研究者総覧

堀 利栄 (ホリ リエ)

  • 大学院理工学研究科 数理物質科学専攻 教授
Last Updated :2020/11/10

研究者情報

通称等の別名

    HORI S. Rie

学位

  • 理学博士(大阪市立大学)

論文上での記載著者名

  • Rie S. Hori
  • Rie Hori

ホームページURL

J-Global ID

プロフィール

  • 愛媛大学の堀です。堀は仕事名です。専門は、地質学、微化石・層序学で中生代を主に研究しています。

研究キーワード

  • 層位・古生物学   地質学   Stratigraphy and Paleontology   Geology   

研究分野

  • 自然科学一般 / 地球生命科学 / 微化石・層序学
  • 自然科学一般 / 固体地球科学 / 付加体地質

経歴

  • 2018年04月 - 現在  愛媛大学学長特別補佐
  • 2017年04月 - 現在  愛媛大学評議員
  • 2017年04月 - 現在  愛媛大学女性未来育成センターセンター長
  • 2014年10月 - 現在  愛媛大学理工学研究科教授
  • 2018年12月 - 2018年12月  リール大学(フランス)Invited Research speaker
  • 2015年04月 - 2017年03月  愛媛大学理学部地球科学科学科長
  • 2007年 - 2014年10月  - 愛媛大学大学院理工学研究科准教授
  • 2011年04月 - 2011年10月  ルンド大学(スウェーデン)客員教授
  • 2005年 - 2007年  愛媛大学大学院理工学研究科Graduate School of Science and Engineering助教授
  • 2005年 - 2007年  Department of Earth Sciences, Faculty of Science, Graduate School of Science and Engineering, Ehime University
  • 2007年  - Department of Earth Sciences, Faculty of Science, Graduate School of Science and Engineering, Ehime University
  • 1994年 - 2005年  愛媛大学理学部地球科学教室Faculty of Science助手
  • 1994年 - 2005年  愛媛大学理学部 地球科学科
  • 1994年 - 1997年  東雲短期大学非常勤講師
  • 1994年 - 1997年  Shinonobe University
  • 1996年 - 1996年  文部省研究開発動向調査研究員
  • 1992年 - 1994年  愛媛大学教養部非常勤講師
  • 1992年 - 1994年  Department of liberal studies, Eheime University
  • 1990年 - 1992年  日本学術振興会特別研究員
  • 1990年 - 1992年  JSPS
  • 1990年 - 1991年  通産省工業技術院地質調査所地質部
  • 1990年 - 1991年  Geological Survey of Japan

所属学協会

  • International Association of Radiolarian Palaeontologists   ニュージーランド王立協会   ニュージーランド地質学会   日本古生物学会   日本地質学会   The Geosciences Society of New Zealand   Palaeontological Society of Japan   Geological Society of Japan   

研究活動情報

論文

  • SIMS analysis of Si isotope for radiolarian test in Mesozoic bedded chert, Inuyama, central Japan
    Maximilien BÔLE, IKEDAMasayuki, Peter O. BAUMGARTNER, HORI S. Rie, Anne-Sophie BOUVIER
    Bulletin of the Geological Survey of Japan 71 4 2020年 [査読有り]
     研究論文(学術雑誌)
  • Masayuki Ikeda, Rie S. Hori, Minoru Ikehara, Ren Miyashita, Masashi Chino, Kazuyoshi Yamada
    GLOBAL AND PLANETARY CHANGE 170 163 - 171 2018年11月 [査読有り]
     研究論文(学術雑誌) 
    One of the most profound environmental changes in the Mesozoic occurred during the Pliensbachian-Toarcian (Pl/To) time interval, including massive black shale deposition across Pl/To boundary and early Toarcian Oceanic Anoxic Event (T-OAE). These events are associated with negative carbon isotope excursions (CIEs), but their temporal link with C-12-rich carbon injection, possibly related with Karoo-Ferrar volcanisms and carbon cycle feedbacks, such as terrestrial methanogenesis and methane hydrate dissociation, is still debated. Here we present a new chemostratigraphy of the carbon isotopic ratio of organic matter (delta C-13(org)) from Pl/To deep-sea successions, in conjunction with bio-astrochronology. The deep-sea successions are located at the Katsuyama and Sakahogi outcrops in the Inuyama area, Japan, and contain two black bedded chert intervals named T-BBCs 1 and 2, which have astrochronologic ages of 183.25-183.01 +/- 0.2 Ma and 183.55-182.80 +/- 0.2 Ma. Negative CIEs of similar to 2 parts per thousand and similar to 5 parts per thousand are recognized across the base of T-BBCs 1 and 2, respectively, which are correlated with Pl/To boundary and classical T-OAE in shallow marine sections based on biostratigraphy. Astrochronologic ages of the onset of T-BBCs 1 and 2 are within the errors of the oldest high-precision U-Pb ages of Karoo and Ferrar LIPs, respectively. These temporal relations suggest a link between the C-12-rich carbon injection associated with Karoo and Ferrar volcanism, and CIEs associated with widespread black shale deposition across the Pl/To and T-OAE, respectively. Obliquity cycles in classic T-OAE CIE could have linked with terrestrial methanogenesis and methane hydrate dissociation in high-latitudes areas, whereas 405-kyr pacing of termination of T-CIE and T-BBCs deposition would be related with decreased chemical weathering and nutrient supply under weaker monsoon intensity, and possibly suppressed methane cycle across the termination of Pl/To and T-OAE periods.
  • Yasuhide Nakamura, Rei Somiya, Masaru Kanda, Atsushi Yamaguchi, Akihiro Tuji, Rie S. Hori
    JOURNAL OF EUKARYOTIC MICROBIOLOGY 65 6 923 - 927 2018年11月 [査読有り]
     研究論文(学術雑誌) 
    A phaeodarian morphotype, characterized by the feet surrounded with forked pedal spines with anchor-like structures, was collected in the subtropical North Pacific. Considering the morphological and phylogenetic uniqueness, this morphotype is described as Gazelletta kashiwaensis sp. nov. The distribution of this new species is possibly affected by the Kuroshio Current. The feeding behavior of living phaeodarians was first filmed: the present new species floated in the water column stretching "protoplasmic webs" and collected diatoms by repeating the expansion and retraction of "pseudopodium-like tentacles".
  • Yasuhide NAKAMURA, Izumi IWATA, Rie S. HORI, Naomi UCHIYAMA, Akihiro TUJI, Masaki J. FIJITA, Daiske HONDA, Hiroaki OHFUJI
    Journal of Structural Biology 204 1 45 - 51 2018年10月 [査読有り]
     研究論文(学術雑誌) 
    Cross-sections were prepared by ultramicrotome (UM) and focused ion beam (FIB) system in order to examine the skeletal structure of ecologically and geologically important shell-bearing protists: phaeodarians and radiolarians. The elemental composition of the skeleton was clarified by the energy dispersive X-ray spectroscopy, suggesting that the skeletons of both groups are mainly made of amorphous silica (SiO2 center dot nH(2)O) with other minor elements (Na, Mg, Al, Cl, K, Ca and Fe) and that these two groups have similar elemental composition, compared with other siliceous organisms (diatoms and sponges). However, the structural difference among the two groups was confirmed: phaeodarian skeletons are porous, unlike radiolarians with solid skeletons. It was also revealed that the phaeodarian skeleton contains concentric layered structure with spaces, presumably related to the ontogenetic skeleton formation. The distinction in the skeletal ultrafine structure (porous/solid and non-dense/dense) would reflect the ecological difference among the two groups and could be an effective criterion to determine whether microfossils belong to Radiolaria or Phaeodaria. The UM and FIB combined method presented in this study could be a useful approach to examine the chemical and structural characteristics of unculturable and/or rare microorganisms.
  • Carbon cycle dynamics linked with Karoo-Ferrar volcanism and astronomical cycles during Pliensbachian-Toarcian (Early Jurassic)
    責任著者, 池田 昌之, 共著者, 堀利栄, 池原実, 山田和芳, 宮下怜, 千野将史
    Global Planetary Change 410 (num) 134 - 142 2018年08月 [査読有り]
  • Onoue Tetsuji, Hori Rie S., Kojima Satoru
    Science reports of Niigata University. (Geology) = Science reports of Niigata University. (Geology) 32 32 29 - 69 新潟大学理学部 2017年10月 
    The field trip will focus on the radiolarian response to global catastrophic events (e.g., bolide impact, large-scale volcanism, and anoxia) recorded in Triassic and Jurassic radiolarian chert of the Mino Belt, central Japan. The radiolarian chert of the Mino Belt records the sedimentary history of an oceanic plate in the Panthalassa Ocean prior to accretion at the trench. The topics presented and discussed in the field are: (1) the end-Permian mass extinction and recovery from the event; (2) Early Triassic anoxia and subsequent recovery in the Middle Triassic; (3) paleoenvironmental changes across the Early–Late Carnian boundary (Carnian Pluvial Event); (4) collapse of marine ecosystems triggered by a Norian impact event; (5) ocean acidification at the Triassic–Jurassic boundary; and (6) Early Jurassic (Toarcian) anoxia and the formation of black chert. In addition to these topics, this trip will consider aspects of the accretion process of oceanic plate sediments during the Middle to Late Jurassic.
  • Alexandra Abrajevitch, Lubov M. Kondratyeva, Evgeniya M. Golubeva, Kazuto Kodama, Rie S. Hori
    GEOPHYSICAL JOURNAL INTERNATIONAL 206 2 1340 - 1351 2016年08月 [査読有り]
     研究論文(学術雑誌) 
    Understanding the contribution of biogenic magnetic particles into sedimentary assemblages is a current challenge in palaeomagnetism. It has been demonstrated recently that magnetic particles produced through biologically controlled mineralization processes, such as magnetosomes from magnetotactic bacteria, contribute to the recording of natural remanent magnetization in marine and lacustrian sediments. Contributions from other, biologically induced, mineralization types, which are known from multiple laboratory experiments to include magnetic minerals, remain largely unknown. Here, we report magnetic properties of iron minerals formed by a community of iron- and manganese-reducing bacteria isolated from a natural groundwater deposit during a 2 yr long incubation experiment. The main iron phases of the biomineralized mass are lepidocrocite, goethite and magnetite, each of which has environmental significance. Unlike the majority of the previous studies that reported superparamagnetic grain size, and thus no remanence carrying capacity of biologically induced magnetite, hysteresis and first-order reversal curves measurements in our study have not detected significant superparamagnetic contribution. The biomineralized mass, instead, contains a mixture of single-domain to pseudo-single-domain and multidomain magnetite particles that are capable of carrying a stable chemical remanent magnetization. Isothermal remanent magnetization acquisition parameters and first-order reversal curves signatures of the biomineralized samples deviate from previously proposed criteria for the distinction of extracellular (biologically induced) magnetic particles in mixtures. Given its potential significance as a carrier of natural remanent magnetization, environmental requirements, distribution in nature and the efficiency in the geomagnetic field recording by biologically induced mineralization need comprehensive investigation.
  • Masayuki Ikeda, Rie S. Hori, Yuki Okada, Ryoichi Nakada
    PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 440 725 - 733 2015年12月 [査読有り]
     研究論文(学術雑誌) 
    The end-Triassic extinction event marks one of the "big five" mass extinction events of the Phanerozoic. The ultimate cause of the extinction is considered to be volcanic activity at the Central Atlantic magmatic province (CAMP), yet the underlying nature of global environmental changes that accompanied the biotic turnover remains elusive. Here we present chemical and mineralogical studies across the end-Triassic extinction level of the deep-sea chert sequence (Inuyama, Japan). Depleted hematite content normalized by terrigenous material predated the end-Triassic extinction level with significant rock color change from brick red to purple, which is consistent with the rock magnetic records of hematite reported. This suggests the loss of authigenic hematite possibly due to the acidification of bottom-water and the underlying sediment pore-water. This timing is consistent with the initial eruption of CAMP volcanism, suggesting a catastrophic release of greenhouse gases as a cause of deep-ocean acidification. Across the end-Triassic extinction interval, MgO/Al2O3, Fe2O3/Al2O3, and Al2O3/SiO2 increased with change in color from purple to dusty red. This trend became close to those of weathered CAMP basalts in arid area, implying that it became the considerable source of aeolian dust in cherts after the end-Triassic extinction event. These temporal relations support the synchrony among the initial eruption of CAMP, deep-ocean acidification, and the end-Triassic extinction. Similar rock color changes of cherts might have potential information for the volcanisms and deep-ocean acidification in other geologic events. (C) 2015 Elsevier B.V. All rights reserved.
  • 日野愛奈, 佐野栄, 堀利栄
    愛媛大学理学部紀要 20 i‐xiii  2015年
  • Rie S. Hori, Koji Takayama, Jack A. Grant-Mackie, Bernhard K. Spörli, Yoshiaki Aita, Toyosaburo Sakai, Atsushi Takemura, Kazuto Kodama
    Revue de Micropaleontologie 58 1 13 - 28 2015年01月 [査読有り]
     研究論文(学術雑誌) 
    Two new species and one new subspecies of genus Capnuchosphaera, (. Capnuchosphaera tumida nov. sp., C.waihekeensis nov. sp. and C.texensis australis nov. ssp.) are described herein from phosphatic nodules included in mudstone and sandstone beds of the Waipapa Terrane, Waiheke Island, New Zealand. The phosphatic nodules yielded a rich Late Triassic (Carnian-Norian) radiolarian fauna, with a high abundance of spumellarian taxa including numerous species of the genera Capnuchosphaera, Vinassaspongus, Kahlerosphaera, Sarla and Dumitricasphaera. Waiheke Island Capnuchosphaera are characterized by a large cortical shell and a distinctively low ratio of spine length to cortical shell diameter. These features differ significantly from those of Capnuchosphaera in the Tethyan Realm and are considered to be the result of adaptation to an Austral-New Zealand peripheral ocean of Gondwanaland in the Mesozoic Southern Hemisphere.
  • Atsushi Takemura, Rie S. Hori
    Revue de Micropaleontologie 58 1 1 - 2 2015年01月 [招待有り]
     研究論文(学術雑誌)
  • Junichiro Kuroda, Natsuko Ihoriya, Rie S. Hori, Nanako O. Ogawa, Minoru Ikehara, Masaharu Tanimizu, Naohiko Ohkouchi
    Special Paper of the Geological Society of America 511 305 - 328 2015年 [査読有り]
     研究論文(学術雑誌) 
    We present a comprehensive data set of organic and inorganic geochemistry from a lower Cretaceous pelagic bedded chert succession of the Shimanto accretionary belt in the Yokonami Peninsula (Kochi, Japan). Based on stable isotopic composition of total organic carbon (δ< sup> 13< /sup> C< inf> org< /inf> ), in conjunction with radiolarian biostratigraphic data, we propose that a 1.3-m-thick interval within the examined section is correlative with Tethyan Selli Level (Apennines, Italy), a sedimentary expression of oceanic anoxic event (OAE) 1a. Specifi cally, the δ< sup> 13< /sup> C< inf> org< /inf> record illustrates a discernible negative shift and subsequent positive excursions upsection, a pattern that resembles the typical δ< sup> 13< /sup> C< inf> org< /inf> pattern across OAE 1a reported from various sites such as the Mediterranean Tethys and Pacifi c seamount fl anks. Our δ< sup> 13< /sup> C< inf> org< /inf> record from the deep Pacifi c basin supports the idea that the δ13C variation across OAE 1a was induced by a signifi cant perturbation of global carbon cycle. The slight increase in total organic carbon contents of sediment deposited during OAE 1a suggests slight or no expansion of oxygendefi cient water mass in the overlying water column. Rare earth elements and lead isotopic compositions indicate relatively higher contributions of volcanic or hydrothermally altered components before and after OAE 1a. The volcanic or hydrothermal source may be associated with emplacement of the Ontong Java Plateau during the early Aptian, or tectonically induced hydrothermal alteration associated with the formation of the accretionary complex.
  • パンサラッサ海深海堆積物における三畳系—ジュラ系境界層の地球化学的検討.
    岡田 有希, 堀 利栄, 池田昌之, 池原 実
    大阪微化石研究会誌 特別号 第15号, 15 219 - 232 2015年 [査読有り]
     研究論文(研究会,シンポジウム資料等)
  • Kaoru Ogane, Noritoshi Suzuki, Akihiro Tuji, Rie S. Hori
    JOURNAL OF MICROPALAEONTOLOGY 33 143 - 148 2014年09月 [査読有り]
     研究論文(学術雑誌) 
    The secretion process of the siliceous skeleton in polycystine radiolarians has drawn a great deal of interest during the last century; however, little is known about the actual physiological process of silica deposition. Recently, the PDMPO (2-(4-pyridyl)-5-[(4-(2-dimethylaminoethylaminocarbamoyl) methoxy)-phenyl] oxazole) method for staining silica deposition sites in polycystines was developed. In the present study we examined over 30 polycystine cells with PDMPO and found that both the skeletons and pseudopodia of three species (Lithelius sp., Rhizosphaera trigonacantha and Arachnosphaera hexasphaera) were stained and emitted green fluorescent light. Staining of the skeleton was probably the result of skeletal thickening growth, whereas staining of the pseudopodia may indicate that siliceous matter is assimilated within pseudopodia. We refer to this hypothesis as the 'pseudopodial silica absorption hypothesis' (PSA hypothesis). If this hypothesis is correct, PSA is an intermittent process, and the absorbed silica within pseudopodia is quickly transferred to the cytokalymma where it is deposited on the skeleton. To date, the PSA process has been observed in only the three species cited above; therefore we are unable to evaluate whether the PSA process is unique to these species or a common process that occurs in all polycystines; further investigation is necessary.
  • Masayuki Ikeda, Rie S. Hori
    PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 410 134 - 142 2014年09月 [査読有り]
     研究論文(学術雑誌) 
    One of the most profound environmental changes in the Mesozoic took place during Pliensbachian-Toarcian (Early Jurassic), including oceanic anoxia (Toarcian Oceanic Anoxic Event; T-OAE). The T-OAE is thought to have been caused by increased atmospheric CO2 triggered by Karoo-Ferrar volcanism. This idea, however, remains debated, primarily due to uncertainties in their age constraints of the relevant sedimentary sequences. To examine their temporal relationships, herein, we provide the astronomical time scale of the Lower Jurassic deep-sea bedded chert sequences from the pelagic Panthalassa superocean, which are exposed in the Inuyama area, central Japan. A 405-kyr tuned astrochronology, anchored to the end-Triassic extinction as 201.4 +/- 0.2 Ma (Ikeda and Tada, 2013), allows us to constrain the ages of two black bedded cherts (T-OAE1 and T-OAE2). The ages of these T-OAEs overlap U-Pb ages of Karoo volcanic rocks. T-OAE in the European region is also synchronous with the Karoo-Ferrar volcanism, based on radiolarian and ammonite biostratigraphic correlation. These temporal relationships support the potential impact of Karoo-Ferrar volcanism on T-OAEs on a global scale. On the other hand, the onset of T-OAEs occur at the maxima of similar to 40 kyr, similar to 100 kyr, and 405 kyr cycles of chert thickness variation. The termination of T-OAEs and the recovery to oxic conditions in pelagic ocean coincide with the minima of similar to 40 kyr, similar to 100 kyr, and 405 kyr cycles of chert thickness. Moreover, the termination of final black chert and grey chert deposition coincide with the minima of similar to 1800 kyr cycles of chert thickness. These temporal relationships imply that orbital-scale productivity cycles were important in controlling the onset and termination of T-OAEs through the carbon cycle dynamics, which have been already amplified by Karoo-Ferrar volcanism. (C) 2014 Elsevier B.V. All rights reserved.
  • J. A. Grant-Mackie, S. Yamakita, T. Matsumoto, R. S. Hori, A. Takemura, Y. Aita, S. Takahashi, H. J. Campbell
    NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS 57 3 295 - 299 2014年 [査読有り]
     研究論文(学術雑誌) 
    The ornament on a small external cast in pink chert shows considerable similarity with that of various Middle Palaeozoic and Triassic fish genera. It comes from the Permian-Triassic Oruatemanu Formation of Arrow Rocks, Whangaroa area, eastern Northland. Conodont faunas from a few metres above and below the sample allow correlation with the Neospathodus pakistanensis zone of the Early Triassic, which is assigned to the late Dienerian (late Induan), with adjacent conodont zone faunas in their correct stratigraphic association. The cast is assumed to be that of a small fragment of fin spine, most likely from the junction area of the crown and root on the right-hand side of a dorsal fin spine, possibly anterior, of a marine ctenacanthoid shark, a basal shark order not previously recorded from New Zealand.
  • Tomohiro Tsuji, Masayuki Sakakibara, Rie S. Hori
    JOURNAL OF ASIAN EARTH SCIENCES 79 31 - 41 2014年01月 [査読有り]
     研究論文(学術雑誌) 
    Understanding the primary relationships between basaltic rocks and fossiliferous sedimentary rocks provides direct information on the timing and geologic setting of past oceanic igneous activity. Though the basalts associate with cherts in the Northern Chichibu Belt have been petrographically identified as OIA/OIT or MORB, such primary relationships of them are not well understood.This paper provides the primary intrusive relation of basaltic rocks contact with chert and calcareous siliceous shale of Sugyo area in the Northern Chichibu Belt on Shikoku Island. The sediments are included within the basalt as xenoliths and in the contact zone with the basalt they have been recrystallized and contain metamorphic minerals possibly produced by contact metamorphism due to the basalt intrusion. These indicate that the basalts are sills or dykes that have intruded the sediments. The cherts are radiolarian chert which alternate with the calcareous siliceous shale and include minerals of oceanic volcanic origins. Asselian radiolarian fossils are yielded from a subangular chert xenolith that was intruded by the basalt possibly before the chert had undergone complete diagenesis. The petrography of the sills indicates they are alkali basalts. X-ray fluorescence analyses indicate that the basaltic rocks include subalkaline basalts and oceanic island tholeiite or oceanic island alkaline basalts.We have concluded that the basaltic dykes and sills were products of Asselian or younger intra-plate volcanism at an oceanic area covered by a pile of pelagic siliceous sediments. These Asselian cherts are earlier than the Sakmarian, Wordian and Capitanian limestones that overlie intra-plate basalts of Ohnogahara part of the Northern Chichibu Belt. The basalt sills may therefore represent the early stages of intra-plate igneous activity in the paleo-Pacific Ocean. (C) 2013 Elsevier Ltd. All rights reserved.
  • Spela Gorican, Elizabeth S. Carter, Jean Guex, Luis O'Dogherty, Patrick De Weyer, Paulian Dumitrica, Rie S. Hon, Atsushi Matsuoka, Patricia A. Whalen
    PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 386 620 - 636 2013年09月 [査読有り]
     研究論文(学術雑誌) 
    Recent studies on the global distribution of Pliensbachian and Toarcian polycystine radiolarians allowed us to examine faunal turnovers and the biogeography through this critical time interval around a major ecologic and biotic crisis. The analysis is based on the distribution of 167 species belonging to 69 genera. Significant variations in the ratio between the number of originating and extinct species have been recognized. During the early Early Pliensbachian FADs greatly exceeded LADs and the maximum diversity was reached in the late Early Pliensbachian. The trend then reversed with the number of LADs exceeding FADs throughout the Late Pliensbachian and Early Toarcian (extinction interval). Recovery started in the Middle and Late Toarcian, when the number of FADs again surpassed the number of LADs. Three differing evolutionary patterns are observed amongst radiolarian genera through the studied time interval. The largest group diversified rapidly in the Early Pliensbachian and experienced higher extinction rates in the Late Pliensbachian and Early Toarcian; a second group exhibited no major changes; and a third group of mainly spongy spumellarians was successful during the extinction interval. The overall trend of radiolarian diversity is in a fairly good agreement with that of other marine faunas (ammonites and also benthos), but shows an inverse correlation with diversity trends of phytoplankton. Correlation with concomitant environmental changes indicates that radiolarian radiation/extinction rates were not consistently linked with temperature fluctuations or sea-level changes. It is also evident that the diversity decrease started well before the Early Toarcian negative delta C-13 peak and the Oceanic Anoxic Event (OAE). The extinction interval corresponds well to the duration of a short-term anomaly in the strontium-isotope record, including the rapid decrease of Sr-87/Sr-86 values in the Late Pliensbachian as well as the rapid increase in the Early Toarcian. This coincidence supports the hypothesis that the predominance of extinctions over originations was caused by a series of climate and environmental changes related to intensified magmatic activity. Some distinct biogeographic differences have been observed. Generic differences are most strongly displayed by the presence or absence of a particular genus or by changes in abundance while species differences range from greater variability to having completely different species in separate palaeolatitudinal realms. Two groups of genera are distinguished: those that are common to abundant in the Tethys (low latitudes) and rare to absent in mid to high latitudes, and those common to abundant in mid to high latitudes and rare to absent in the Tethys. (C) 2013 Elsevier B.V. All rights reserved.
  • Alexandra Abrajevitch, Rie S. Hori, Kazuto Kodama
    GEOLOGY 41 7 803 - 806 2013年07月 [査読有り]
     研究論文(学術雑誌) 
    The end-Triassic mass extinction event is regarded as one of the five largest extinction events of the Phanerozoic. The emerging consensus points to volcanic activity at the Central Atlantic Magmatic Province (CAMP) as the ultimate cause of the extinction, yet the underlying mechanisms and the nature of global environmental changes that accompanied the biotic turnover remain elusive. We present a rock magnetic study of the extinction interval found within a continuous chert sequence that provides an uninterrupted record of pelagic sedimentation in the Panthalassa Ocean. The variations in the relative abundances and characteristics of authigenic magnetic phases indicate that the Triassic-Jurassic transition progressed in two stages. The initial stage, characterized by a disappearance of the previously ubiquitous magnetofossils, started a few tens of thousands of years to 100 k.y. prior to the formal Triassic-Jurassic boundary as identified by the diagnostic radiolarian species. The second stage, defined by significant changes in optical and magnetic properties of hematite pigment, lasted a few tens of thousands of years. The stepwise change in magnetic properties is suggestive of the protracted environmental deterioration, likely prompted by the early episodes of the CAMP volcanism, which was followed by a sudden ocean acidification event, perhaps triggered by a catastrophic release of gas hydrates.
  • Satoshi Takahashi, Kunio Kaiho, Rie S. Hori, Paul Gorjan, Takahiro Watanabe, Satoshi Yamakita, Yoshiaki Aita, Atsushi Takemura, K. Bernhard Spoerli, Takeshi Kakegawa, Masahiro Oba
    GLOBAL AND PLANETARY CHANGE 105 68 - 78 2013年06月 [査読有り]
     研究論文(学術雑誌) 
    Mesozoic accretionary complexes in Japan and New Zealand contain Panthalassic low latitude and southern mid-latitude deep-water sedimentary rock respectively. These sedimentary rocks record environmental changes in the pelagic Panthalassic Ocean during the transition associated with the severe Permian-Triassic mass extinction. This study presents sulfur isotope records of sulfide from continuous deep-sea Permian-Triassic boundary sections located in northeast Japan (the Akkamori section-2, the most continuous section among other previously reported deep-sea sections) and North Island of New Zealand (the Waiheke-1 section, providing the first sulfur isotopic record from a southern hemisphere deep-sea section). Both sections show sharp similar to 15 parts per thousand drops of the sulfur isotope ratio coupled with a negative shift of organic carbon isotope ratio. Similar decreases in sulfur isotope ratio of carbonate-associated sulfates by similar to 10 parts per thousand accompanied with a negative shift of inorganic carbon isotope ratio at the end-Permian mass extinction horizon have been reported in some shallow water Paleotethyan sections. These sulfur isotope changes suggest that a massive release of S-32-enriched sulfur from the H2S-rich water to the oxic surface-waters coincided with the end-Permian mass extinction. (C) 2013 Elsevier B.V. All rights reserved.
  • Rie S. Hori, Satoshi Yamakita, Minoru Ikehara, Kazuto Kodama, Yoshiaki Aita, Toyosaburo Sakai, Atsushi Takemura, Yoshihito Kamata, Noritoshi Suzuki, Satoshi Takahashi, K. Bernhard Spörli, Jack A. Grant-Mackie
    Palaeoworld 20 2-3 166 - 178 2011年08月 研究論文(学術雑誌) 
    This study examines a Triassic deep-sea sequence consisting of rhythmically bedded radiolarian cherts and shales and its ifcmplications for early Induan radiolarian fossils. The sequence, obtained from the Waipapa terrane, Waiheke Island, New Zealand, is composed of six lithologic Units (A-F) and, based on conodont biostratigraphy, spans at least the interval from the lowest Induan to the Anisian. Unit A (the basal unit) consists of black chert and shale beds containing fine pyrite minerals this corresponds to the oceanic anoxic event described at Arrow Rocks further north in New Zealand. The δ13Corg values of Unit A show a pronounced negative shift between the pale-green chert and black shale/chert, which may represent the negative excursion across the Permian-Triassic boundary that has been documented worldwide. The black cherts, which give minimum C-isotopic ratios (around -30‰), are early Induan, and contain a rich radiolarian fauna characterized by Entactinosphaera? crassispinosa Sashida and Tonishi, E.? spoerlii Takemura and Aono, Bistarkum martiali Feng, Entactinia cf. itsukaichiensis Sashida and Tonishi, Ellipsocopicyntra? sp., and rare Nassellaria. A new Induan nassellarian species, Tripedocorbis? blackae n. sp., from the black chert bed, is described herein. Its presence indicates that Triassic-type Nassellaria had already appeared in the early Induan in the pelagic realms of southern hemisphere Panthalassa. © 2011 Elsevier Ltd and Nanjing Institute of Geology and Palaeontology, CAS.
  • Junichiro Kuroda, Masaharu Tanimizu, Rie S. Hori, Katsuhiko Suzuki, Nanako O. Ogawa, Maria L. G. Tejada, Millard F. Coffin, Rodolfo Coccioni, Elisabetta Erba, Naohiko Ohkouchi
    EARTH AND PLANETARY SCIENCE LETTERS 307 1-2 126 - 134 2011年07月 [査読有り]
     研究論文(学術雑誌) 
    We present initial isotopic ratios of lead for Early Cretaceous (Barremian-Aptian) sections from Shatsky Rise (Pacific) and Gorgo a Cerbara (Italy). Our Pb isotopic data track an interval representing Oceanic Anoxic Event (OAE)-1a, which is characterized by quasi-global deposition of organic carbon-rich black shale. Pb isotopic compositions of sediments from Shatsky Rise decrease at the end of Barremian time, from radiogenic continental values to unradiogenic values, and subsequently remained less radiogenic until the end of early Aptian time. We explain the isotopic shift by a significant increase in supply rate of unradiogenic Pb, most likely due to massive volcanism. In contrast, the Pb isotopic compositions from the Italian section, which was situated at the western end of Tethys, are mostly identical to those of upper continental crust, showing no significant change in supply rate of unradiogenic Pb. The discrepancy between two sites is attributed to quiescent deep-submarine eruptions of Pacific large igneous provinces (LIPs) such as the Ontong Java Plateau (OJP), which severely limited dispersion of Pb-carrying particles out of the Pacific Ocean. Published Os isotopic data from the Italian section indicate two episodes of massive eruptions of OJP or contemporaneous Manihiki and Hikurangi plateaus starting from earliest Aptian time, slightly later than that indicated by the sedimentary Pb isotopic record from Shatsky Rise. Differences in isotopic variations between Pb and Os likely reflect differences in their chemical behaviors in the oceans, i.e., Pb isotopic compositions would have varied in response to local or regional changes in sediment provenances, whereas large-scale changes in Os inputs are required to explain variations in seawater Os isotopic compositions. Our Pb isotopic data, together with the published Os isotopic record, provide new evidence for the eruptive history of OJP together with contemporaneous Pacific plateaus and its environmental consequences, starting from end-Barremian time and extending through early Aptian time. (c) 2011 Elsevier B.V. All rights reserved.
  • Alexandra Abrajevitch, Rie S. Hori, Kazuto Kodama
    EARTH AND PLANETARY SCIENCE LETTERS 305 1-2 135 - 142 2011年05月 [査読有り]
     研究論文(学術雑誌) 
    Bedded chert is the only sediment type representative of the Paleozoic to early Mesozoic pelagic marine environment. Because of their association with ophiolites and island arc rocks, presence of datable microfossils and paleohorizontal reference provided by well-developed bedding surfaces, bedded chert sequences are often targeted for paleomagnetic tectonic studies. However, processes of magnetization acquisition in biosiliceous sediments, and consequently, the significance of their magnetic record, are not well understood. Our rock magnetic study of a Triassic-Jurassic radiolarian chert sequence, the Mino Terrane, Central Japan, shows that the ferrimagnetic assemblage of the gray chert units is of detrital origin, while the red chert's assemblage is dominated by authigenic phases - pigmentary hematite and biogenic magnetite - which contribute to the natural remanent magnetization. The presence of magnetofossils places red oxic chert in the category of prospective environmental archives. Magnetite-producing magnetotactic bacteria were apparently able to tolerate elevated concentrations of dissolved silica as well as a steep redox gradient in sedimentary pore-waters during the deposition of red chert layers. A strong uniaxial anisotropy due to chain-alignment of the biogenic magnetite grains likely contributes to the acquisition of anomalously stable partial thermoviscous magnetization by chert even at low metamorphic temperatures. (C) 2011 Elsevier B.V. All rights reserved.
  • An open marine record of the Toarcian oceanic anoxic event
    European Geosciences UnionSolid Earth Discussion 3 385 - 410 2011年
  • D. R. Groecke, R. S. Hori, J. Trabucho-Alexandre, D. B. Kemp, L. Schwark
    SOLID EARTH 2 2 245 - 257 2011年 [査読有り]
     研究論文(学術雑誌) 
    Oceanic anoxic events were time intervals in the Mesozoic characterized by widespread distribution of marine organic matter-rich sediments (black shales) and significant perturbations in the global carbon cycle. These perturbations are globally recorded in sediments as carbon isotope excursions irrespective of lithology and depositional environment. During the early Toarcian, black shales were deposited on the epi- and pericontinental shelves of Pangaea, and these sedimentary rocks are associated with a pronounced (ca. 7 parts per thousand) negative (organic) carbon isotope excursion (CIE) which is thought to be the result of a major perturbation in the global carbon cycle. For this reason, the lower Toarcian is thought to represent an oceanic anoxic event (the T-OAE). If the T-OAE was indeed a global event, an isotopic expression of this event should be found beyond the epi- and pericontinental Pangaean localities. To address this issue, the carbon isotope composition of organic matter (delta C-13(org)) of lower Toarcian organic matter-rich cherts from Japan, deposited in the open Panthalassa Ocean, was analysed. The results show the presence of a major (>6 parts per thousand) negative excursion in delta C-13(org) that, based on radiolarian biostratigraphy, is a correlative of the lower Toarcian negative CIE known from Pangaean epi- and pericontinental strata. A smaller negative excursion in delta C-13(org) (ca. 2 parts per thousand) is recognized lower in the studied succession. This excursion may, within the current biostratigraphic resolution, represent the excursion recorded in European epi-continental successions close to the Pliensbachian/Toarcian boundary. These results from the open ocean realm suggest, in conjunction with other previously published datasets, that these Early Jurassic carbon cycle perturbations affected the active global reservoirs of the exchangeable carbon cycle (deep marine, shallow marine, atmospheric).
  • Kaoru Ogane, Akihiro Tuji, Noritoshi Suzuki, Atsushi Matsuoka, Toshiyuki Kurihara, Rie S. Hori
    MARINE MICROPALEONTOLOGY 77 3-4 137 - 144 2010年12月 [査読有り]
     研究論文(学術雑誌) 
    Skeletogenesis in polycystine radiolarians was detected, using a fluorescent compound called PDMPO (2-(4-pyridyl)-5-[(4-(2-dimethylaminoethylaminocarbamoyl)methoxy)-phenyl] oxazole). This compound binds under acidic conditions with silica in the silica deposition vesicle (SDV) of radiolarians, and only newly added silica emits a green fluorescence under ultraviolet light. We used cells fixed with formaldehyde of two species of spherical Spumellaria (Hexacontium philosophica and Rhizosphaera trigonacantha) and three species of cyrtid Nassellaria (Anthocyrtidium angulare, Clathrocyclas (?) cassiopeiae, and Lophophaena hispida), in which green fluorescence occurred in the entire skeleton outside the endoplasm. In contrast, the conical nassellarian species Eucyrtidium hexagonatum emitted green fluorescence only on the cephalo-thorax-abdominal part of the skeleton, and on part of the inner ring at the segmental suture, and the margins of pores, suggesting partial biological silicification. Two flat spumellarian species (Dictyocoryne profunda and Rhopalastrum elegans) showed bright green fluorescence over the full skeleton in some cells, but other cells did not fluoresce at all, even though young cells in good condition were tested, suggesting that intermittent growth occurs in these species, as known from a controlled incubation experiment. We did not observe development of new skeletons, but "skeletal thickening growth" (STG), defined as silica deposition over the surface of an existing skeleton, occurred to varying degrees in the polycystines, and may result in the formation of lamellar structures, as observed in sectioned skeletons of polycystines. (C) 2010 Elsevier B.V. All rights reserved.
  • Junichiro Kuroda, Rie S. Hori, Katsuhiko Suzuki, Darren R. Groecke, Naohiko Ohkouchi
    GEOLOGY 38 12 1095 - 1098 2010年12月 [査読有り]
     研究論文(学術雑誌) 
    The Triassic-Jurassic (T-J) boundary ca. 200 Ma represents one of the major mass extinction events of the Phanerozoic; however, the cause of this event remains controversial because of a paucity of geological evidence. In this study we present an isotopic record of osmium extracted from a bedded chert succession across the T-J boundary in the Kurusu section of Japan, deposited within a Paleo-Pacific (Panthalassa) deep basin. The data show a gradual decrease in seawater Os-187/Os-188 values during the Rhaetian, followed by a sharp increase in the latest Rhaetian, and a subsequent stable phase across the T-J boundary. The decreasing trend of Os-187/Os-188 values during the Rhaetian indicates a gradual increase in the relative supply rate of unradiogenic Os from the mantle associated with emplacement of the Central Atlantic Magmatic Province. The subsequent shift toward radiogenic values reflects an increased supply of radiogenic Os due to enhanced continental weathering. This interval marks more negative isotopic values of organic carbon, the onset of radiolarian faunal turnover, and conodont extinctions, indicating that the rapid increase in continental weathering rate was closely linked to the perturbation of the carbon cycle and the T-J biotic crisis.
  • Elizabeth S. Carter, Spela Gorican, Jean Guex, Luis O'Dogherty, Patrick De Wever, Paulian Dumitrica, Rie S. Hori, Atsushi Matsuoka, Patricia A. Whalen
    PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 297 2 401 - 419 2010年11月 [査読有り]
     研究論文(学術雑誌) 
    Jurassic radiolarians from 220 samples in Queen Charlotte Islands, B.C., Williston Lake, B.C., east-central Oregon, Baja California Sur, southern Spain, Austria, Slovenia, Turkey, Oman, Japan and Argentina were studied in order to construct global zonation for the Pliensbachian, Toarcian and Aalenian stages. Well-preserved faunas from continuous stratigraphic sections in Queen Charlotte Islands provide the most detailed record for this time interval, and all collections are tied to North American ammonite zones or assemblages. Collections from nearly all other areas lack independent dating except for early Toarcian carbon-isotope dating in Slovenia and late Aalenian ammonites in Spain.A database of 197 widely distributed updated taxonomic species was used to construct a Unitary Association (UA) zonation for the interval. A global sequence of 41 UAs was obtained for the top of the Sinemurian to the base of the Bajocian. The first and the last UAs represent the Late Sinemurian and the Early Bajocian respectively. The remaining 39 UAs were merged into nine zones (four Early Pliensbachian, one Late Pliensbachian, one Early Toarcian, one Middle-Late Toarcian, and two Aalenian) according to prominent radiolarian faunal breaks and ammonite data. The new zones are the Canutus tip pen - Katroma clara Zone (latest Sinemurian/earliest Pliensbachian); Zartus mostleri - Pseudoristola megaglobosa, Hsuum mulleri - Trillus elkhornensis and Gigi fustis - Lantus sixi zones (Early Pliensbachian); Eucyrtidiellum nagaiae - Praeparvicingula tlellensis Zone (Late Pliensbachian); Napora relica - Eucyrtidiellum disparile Zone (Early Toarcian); Elodium pessagnoi - Hexasaturnalis hexagonus Zone (Middle and Late Toarcian); Higumastra transversa - Napora nipponica Zone (early Aalenian); and Mirifusus proavus - Transhsuum hisuikyoense Zone (late Aalenian). These zones can be correlated worldwide and link previously established UA zonations for the Hettangian-Sinemurian and the Middle to Upper Jurassic. The new zonation allows high-resolution dating in the studied interval and provides a solid basis for analyzing faunal turnovers and the paleobiogeography of Jurassic radiolarians. (C) 2010 Elsevier B.V. All rights reserved.
  • Kenichi Akikuni, Rie S. Hori, Vivi Vajda, Jack A. Grant-Mackie, Minoru Ikehara
    STRATIGRAPHY 7 1 7 - 24 2010年 [査読有り]
     研究論文(学術雑誌) 
    We have examined the stable carbon isotope stratigraphy, bio- and litho-stratigraphy of the Upper Triassic (Otapirian) - Lower Jurassic (Aratauran) boundary strata from the Awakino gorge and Kawhia coast sections, Murihiku Terrane, North Island, New Zealand. Successive occurrences of species of the bivalve genus Otapiria, O. dissimilis, O. marshalli and O. aff. marshalli, and also of age diagnostic ammonites indicate that the Hettangian strata in both sections are very thin compared with the Rhaetian sequences. Lamination structures are well developed at the Tr-Jr (Rhaetian-Hettangian) boundary transition interval. The delta C-13 values of organic matter from siltstone and carbonate nodules in the sedimentary rocks range from -28.5 to -25.5 parts per thousand and there is no correlation between delta C-13(org) and C/N ratios. The excursion patterns of delta C-13(org) from both sections are similar, showing a negative spike at the uppermost Rhaetian and a positive spike immediately below the Tr-Jr boundary. A long-lived positive shift is also recognized in the Awakino gorge section, which coincides in pattern with those reported in Tr-Jr boundary successions from the Queen Charlotte Islands, British Columbia, Canada. These results suggest that although magnitude and absolute values are slightly different, the integrated pattern of stable carbon isotope signatures over the Tr-Jr boundary could be a valuable tool for correlation, at least between sedimentary rocks from similar depositional settings in the Panthalassa.
  • 内野 隆之, 堀 利栄
    地質学雑誌 116 8 441 - 446 一般社団法人 日本地質学会 2010年 
    Early Jurassic radiolarian faunae were extracted from mudstone samples collected at three localities (Se1, Ik1, and Jo2) in an accretionary complex within the Ashio Terrane in the Kambara Mountains, Niigata Prefecture, Japan. The faunae of both Se1 and Ik1 are dominated by Canoptum species, in association with two characteristic species belonging to Gorgansium (G. sp. A and G. sp. B) for Se1, and species belonging to Parahsuum, Lantus, and Helvetocapsa for Ik1. The fauna in Jo2 consists mainly of the species of Parvicingula, Zhamoidellum, and gen. et sp. indet. B.
    Based on a comparison of these radiolarians with those from North America, Europe, and Southwest Japan, the ages of the faunae from Se1, Ik1, and Jo2 are Hettangian, Late Pliensbachian, and Middle to Late Toarcian/Aalenian?, respectively.
    This is the first report of radiolarian fossils from terrigenous clastic rocks (mudstone) in the Kambara Mountains; thus, this result contributes to reconstructions of oceanic plate stratigraphy in the region and to correlating the area with other accretionary complexes in the Ashio Terrane.
  • 榊原正幸, 大森優子, HA Nguyen, Thi Hoang, 佐野栄, 世良耕一郎, 堀利栄
    Proc Symp Geo-Environ Geo-Tech 19th 93 - 96 2009年12月
  • SAKAKIBARA Masayuki, HARADA Aki, SANO Sakae, HORI Rie S
    地質汚染-医療地質-社会地質学会誌 5 1/2 1 - 9 2009年06月 [査読有り]
     研究論文(学術雑誌)
  • Hori Rie S., Yamakita Satoshi, Dumitrica Paulian
    Paleontological research 13 1 53 - 63 Palaeontological Society of Japan 2009年04月 
    A new genus (Triassiphaeodina gen. nov.) and two new species (Medusetta japonica sp. nov. and Triassiphaeodina niyodoensis sp. nov.) of Late Triassic (Rhaetian) phaeodarian Radiolaria are described from a phosphatic nodule found in melange rocks of the Northern Chichibu Belt, Shikoku, Japan. The Rhaetian age of the nodule and of the phaeodarian new taxa is based on co-occurring Polycystina Radiolaria, including Bipedis acrostylus Bragin, Livarella densiporata Kozur and Mostler, Fontinella primitiva Carter, and Ferresium sp. A of Carter (1993). This finding shows that phaeodarian Radiolaria were already represented in Late Triassic oceans, with morphologies similar to those known in the Late Cretaceous and Cenozoic, from which they have previously been reported. The new taxa described herein represent the oldest known phaeodarian fossils.
  • Nguyen Thi Hoang Ha, Masayuki Sakakibara, Sakae Sano, Rie S. Hori, Koichiro Sera
    CLEAN-SOIL AIR WATER 37 3 203 - 208 2009年03月 [査読有り]
     研究論文(学術雑誌) 
    Phytoremediation, a plant-based and cost-effective technology for the cleanup of contaminated soil and water, is receiving increasing attention. In this study, the aquatic macrophyte Eleocharis acicularis was examined for its ability to take up multiple heavy metals and its potential application for phytoremediation at an abandoned mining area in Hokkaido, Japan. Elemental concentrations were measured in samples of F. acicularis, water, and soil collected from areas of mine tailing and drainage. The results reveal that Pb, Fe, Cr, Cu, Ni, and Mn accumulation in the plants increased over the course of the experiment, exceeding their initial concentrations by factors of 930, 430, 60, 25, 10, and 6, respectively. The highest concentrations of Fe, Pb, Zn, Ni, Cr, Cu, and Ni within the plants were 59500, 1120, 964, 388, 265, 235, and 47.4 mg/kg dry wt., respectively, for plants growing in mine drainage after 11 months of the experiment. These results indicate that E. acicularis is a hyperaccumulator of Pb. We also found high Si concentrations in E. acicularis (2.08%). It is likely that heavy metals exist in opal-A within cells of the plant. The bioconcentration factors (BCF; ratio of metal concentration in the plant shoots to that in the soil) obtained for Cr, Cu, Zn, Ni, Mn, and Pb were 3.27, 1.65, 1.29, 1.26, 1.11, and 0.82, respectively. The existence of heavy metals as sulphides is thought to have restricted the metal-uptake efficiency of E. acicularis at the mine site. The results of this study indicate that E. acicularis shows great potential in the phytoremediation of mine tailing and drainage rich in heavy metals.
  • 紀伊半島西部黒瀬川からのペルム紀古世放散虫化石の産出
    大阪微化石研究会編集委員会大阪微化石研究会誌 特別号 特別号 14 537 - 544 2009年 [査読有り]
  • 四国中西部の北部秩父帯中の炭酸塩ノジュールから産出した前期ジュラ紀放散虫化石
    大阪微化石研究会誌編集委員会大阪微化石研究会誌特別号 特別号 14 497 - 505 2009年
  • 四万十帯白亜系層状チャートにおけるOAE1a無酸素水塊の深度予測とD13Corg・微量元素変動
    大阪微化石研究会編集委員会大阪微化石研究会誌 特別号 特別号 14 297 - 315 2009年
  • Sugiyama Kazuhiro, Hori Rie S., Kusunoki Yoshitaka, MATSUOKA ATSUSHI, Department of Earth Sciences Graduate School of Science and Engineering Ehime University, Department of Earth Sciences Graduate School of Science and Engineering Ehime University, Department of Geology Faculty of Science Niigata University
    Paleontological research 12 3 209 - 222 Palaeontological Society of Japan 2008年09月 
    Light microscopic studies, using both video imaging and normal camera, were made on living nassellarian radiolarians Eucyrtidium hexagonatum Haeckel, Pterocorys zancleus (Muller) and Dictyocodon prometheus Haeckel from the East China Sea off Okinawa Island, Japan. Continuous and careful observations revealed pseudopodial activity related mostly to feeding behavior. The results are presented in detail with the definition of 11 descriptive terms for nassellarian pseudopodia. Among them, terminal projections (TP) extending as straight projections from the aperture of the shell body and forming a conical structure (terminal cone: TC) and axial projections (XP) prolonged outward from the center of the aperture and proximally surrounded by TP are used for feeding. Although there are some minor differences, feeding activities of the three species can be subdivided into the following three cyclic phases; Phase 1 characterized by gradual extension of TP and XP from the aperture, Phase 2 marked by an abrupt withdrawal of TP and XP toward the aperture to engulf captured prey, and Phase 3 during which entangled TP used for capturing prey are completely retracted into the aperture. These lines of evidence suggest that the shell aperture plays the same role of a feeding apparatus as does a mouth. Interestingly, XP of E. hexagonatum sometimes shows abnormal branching, fusion and separation, which is different from the spumellarian axoflagellum.
  • Susumu Shibutani, Rie S. Hori
    Micropaleontology Project, Inc, New YorkStratigraphy 5 1 83 - 98 2008年07月 
    Well-preserved Lower Jurassic (Hettangian-Sinemurian) radiolarian fossils were obtained from black chert and shale of the Wakai complex in the Ikuno, area, Tamba Terrane, Southwest Japan. These faunas are dominated by the genera Natoba, Canoptum, Ovumella, and Droltus. We define a Natoba-rich Assemblage as one containing >10% Natoba in the nassellarian assemblage. This assemblage is also characterized by relatively high abundance of Canoptum and Ovumella (combined abundance >15% nassellarian assemblage) and a low nassellarian/spumellarian ratio (<0.2). Based on data from Lower Jurassic radiolarian faunas from Japan, the Natoba-rich Assemblage is very similar to the Canoptum Assemblage. These two assemblages both contain common Natoba and occur exclusively in fine-grained silicielastic rocks and black cherts. Considering the global distribution of Natoba, the Natoba-rich Assemblage appears to be restricted to oceanic regions peripheral to the western Panthalassa and Tethys.
  • Susumu Shibutani, Rie S. Hori
    STRATIGRAPHY 5 1 83 - 98 2008年 [査読有り]
     研究論文(学術雑誌) 
    Well-preserved Lower Jurassic (Hettangian-Sinemurian) radiolarian fossils were obtained from black chert and shale of the Wakai complex in the Ikuno area, Tamba Terrane, Southwest Japan. These faunas are dominated by the genera Natoba, Canoptum, Ovumella, and Droltus. We define a Natoba-rich Assemblage as one containing >10% Natoba in the nassellarian assemblage. This assemblage is also characterized by relatively high abundance of Canoptum and Ovumella (combined abundance >15% nassellarian assemblage) and a low nassellarian/spumellarian ratio (<0.2). Based on data from Lower Jurassic radiolarian faunas from Japan, the Natoba-rich Assemblage is very similar to the Canoptum Assemblage. These two assemblages both contain common Natoba and occur exclusively in fine-grained siliciclastic rocks and black cherts. Considering the global distribution of Natoba, the Natoba-rich Assemblage appears to be restricted to oceanic regions peripheral to the western Panthalassa and Tethys.
  • Phytoremediation potential of Eleocharis acicularis in a mining site of Hokkaido,Japan
    Ha,N.T.H, M.Sakakibara, S.Sano, R.S.Hori, D.takehara, K.Sera
    Proceedings from the Fourth International Conference on Environmental Science and Technology 216 - 221 2008年
  • Phytoextraction of heavy metal contaminated sediments and water bymacrophytes Eleocharis acicularis
    M.Sakakibara, S.Sano, R.S.Hori, A.Harada
    Proceedings from the Fourth International Conference on Environmental Science and Technology 215  2008年
  • Sakae Sano, Masayuki Sakakibara, Etsuko Chiba, Rie Hori
    Contaminated Soils 12 149 - 158 2007年12月 
    The ionic migration of antimony in various weathered and country rocks during chemical weathering was studied The Ichinokawa abandoned mine of Shikoku Island, Japan is famous for the production of stibnite. The antimony deposits are mainly in Sambagawa metamorphic rocks and the brecciated rocks (Ichinokawa breccia) formed through a hydro-fracturing process associated with hydrothermal fluid related to Tertiary igneous activity around the area. Antimony content in stream water around the mine was extremely high (over 200 □g/L), which indicates that antimony dissolves into the water from the country rocks by chemical weathering. We examined the antimony contents in variously weathered and altered country rocks in the streambed, to understand the transfer of the element into the stream water. Consequently, antimony content in brown-colored, strongly weathered and altered part of the rocks was higher than that in the unweathered (or weakly weathered) part. The antimony content in the strongly weathered part was several tens to hundreds ppm, although the content in unweathered part was significantly low, sometimes under the detection of XRF. This may indicate that the antimony in the stream water is adsorbed selectively in the strongly weathered and altered part of the streambed rock. The strongly weathered and altered rocks contain many iron hydroxides, which may trap antimony ion from the water. A similar phenomenon was observed in the other area. This suggests that a high distribution of antimony ion into the strongly weathered and altered rocks including iron hydroxides against the water is ubiquitous.
  • Rie S. Hori, Toru Fujiki, Eriko Inoue, Jun-Ichi Kimura
    PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 244 1-4 391 - 406 2007年02月 [査読有り]
     研究論文(学術雑誌) 
    Micropalaeontological and geochemical analyses were performed on samples from a continuous sequence of bedded chert from the Kurusu (KU) section, Inuyama area, southwest Japan. The sequence contains the Triassic-Jurassic (T-J) boundary and is representative of deep-sea sediments from Panthalassa. The succession records a rapid, stepwise extinction pattern of radiolarian faunas, and the disappearance of conodonts at the T-J boundary. Comparison of micropalaeontological results and geochemical data reveals anomalously high abundances of platinum group elements (PGEs) in the latest Rhaetian, at the beginning of the radiolarian extinction at the T-J boundary. The PGE anomaly suggests that the radiolarian ooze of Panthalassa was contaminated by siderophile-rich materials during the late Rhaetian. The rare earth element (REE) pattern shows no distinct change across the T-J boundary, except for one significant positive Ce anomaly immediately below the PGE anomaly. These geochemical signatures imply the anomalous input of PGE-rich materials, but no obvious anoxic event in deep-sea sediments during latest Triassic time. The PGE anomaly at the end of the Triassic may be linked to the first phase of marine plankton extinction, but would not have been directly connected with the main radiolarian extinction at the T-J boundary. (c) 2006 Elsevier B.V. All rights reserved.
  • Late Induan (Dienerian) Permian Nassellarians from Arrow Rocks, Northland, New Zealand
    GNS Science, New ZealandGNS Science Monograph 24 109 - 116 2007年
  • A conodont biostratigraphic framework of a Permian/Triassic ocean-floor sequence in the accretionary Waipapa Terrane at Arrow Rocks, Northland, New Zealand
    GNS Science, New ZealandGNS Science Monograph 24 69 - 86 2007年
  • The depositional environment of the Induan(Early Triassic) biosiliceous sequence(Units2b and 3 of the Oruatemanu Formation), Arrow Rocks, New Zealand
    GNS Science, New ZealandGNS Science Monograph 24 45 - 68 2007年
  • Results of multidisciplinary studies of the Permian/Triassic ocean floor sequence (Waipapa Terrane) at Arrow Rocks, Northland, New Zealand
    GNS ScienceGNS Science Monograph 24 219 - 229 2007年
  • Paleomagnetic results from Arrow Rocks in the framework of Paleomagnetism in Pre-Neogene Rocks from New Zealand
    GNS Science, New ZealandGNS Science Monograph 24 177 - 196 2007年
  • Geochemistry of the Oruatemanu Formation, Arrow Rocks, Northland, New Zealand
    GNS ScienceThe oceanic permian/triassic boundary sequence at arrow rocks(oruatemanu island), northland, new zealand: geology and paleontogy GNS Science Monograph 24 24 123 - 156 2007年
  • Preliminary report on early Triassic acritarchs from Arrow Rocks, Northland, New zealand
    GNS ScienceThe oceanic permian/triassic boundary sequence at arrow rocks(oruatemanu island), northland, new zealand: geology and paleontogy GNS Science Monograph 24 24 117 - 121 2007年
  • Lithostratigraphy of the oruatemanu formation, waipapa terrance, arrow rocks, northland, new zealand
    The oceanic permian/triassic boundary sequence at arrow rocks(oruatemanu island), northland, new zealand: geology and paleontogy GNS Science Monograph 24 17 - 44 2007年
  • ES Carter, RS Hori
    CANADIAN JOURNAL OF EARTH SCIENCES 42 5 777 - 790 2005年05月 [査読有り]
     
    Precise comparison of the change in radiolarian faunas 3.5 m above a U-Pb zircon dated 199.6 +/- 0.3 Ma tuff and approximately coincident with a negative delta C-13 anomaly in the Queen Charlotte Islands, B.C. (Canada) with Inuyama (Japan) sequences indicates that major global changes occurred across the Triassic-Jurassic (T-J) boundary. Nearly 20 genera and over 130 Rhaetian species disappeared at the end of the Triassic. The index genera Betraccium and Risella disappear and the final appearance of Globolaxtorum tozeri, Livarella valida, and Pseudohagiastrum giganteum sp. nov. are also diagnostic for the end of the Triassic. The low-diversity Hettangian survival fauna immediately above the boundary is composed mainly of small, primitive spumellarians with spongy or irregularly latticed meshwork and rod-like spines, and new genera Charlottea, Udalia, and Parahsuum s.l. first appear in the lowest Hettangian in both localities. Irrespective of different sedimentation rates and sedimentary environments, such as shelf to upper slope (Queen Charlotte Islands) and deep sea below carbonate compensation depth (CCD; Inuyama), radiolarians show a similar turnover pattern at the T-J boundary.
  • 堀 利栄, ヘーミッシュ キャンベル
    地質學雜誌 = THE JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN 110 12 758 - 764 日本地質学会 2004年12月 
    四国東部秩父累帯中の三畳系中部 (Lower Anisian) 層状チャートよりLingularia sp. (腕足類) の化石が産出した. 産出層準は、砥石型珪質粘土岩から頁岩とチャートの等厚互層への漸移部であり、堆積環境が還元状態から回復する過程の貧酸素状態を示す部分である. 本標本と類似するLingularia sp.は、ロシア極東シホテアリン山地の下部~中部三畳系 (Spathian-Lower Anisian) 層状チャート層の頁岩部やニュージーランド付加体中の層状チャートに伴う中期三畳紀の半遠洋性堆積岩からも見つかっている. この発見は、ペルム紀/三畳紀境界イベントに伴うOAE (海洋貧酸素事変) からの回復過程でいわゆる “Lingula ” (本研究でのLingularia も含む) が大繁栄したという見解を支持し、かつその影響が、古太平洋の深海域まで及んだ可能性を示唆している.
  • Radiolarian fossils from the Ikuno district, Hyogo Prefecture
    News of Osaka Micropaleontologists, Special Volume 13 59 - 68 2004年
  • 兵庫県生野地域から産出する放散虫化石
    大阪微化石研究会放散虫研究集会論集 13 59 - 68 2004年
  • Lithofacies of Middle to Late Permian pelagic sedimentary rocks at Arrow Rocks, North Island, New Zealand
    大阪微化石研究会 13 21 - 28 2004年
  • モエジマシダによる砒素を溶出する泥岩のファイトレメディエーション
    第14回環境地質学シンポジウム論文集 255 - 258 2004年
  • 愛媛県砥部町万年地域における砒素に富む変質安山岩の風化作用と地表水の砒素濃度の関係
    第14回環境地質学シンポジウム論文集 129 - 134 2004年
  • 硫砒鉄鉱を含む変質安山岩のモエジマシダによるファイトレメディエーションに関する基礎的実験
    第14回環境地質学シンポジウム論文集 11 - 20 2004年
  • RS Hori, JD Campbell, JA Grant-Mackie
    JOURNAL OF THE ROYAL SOCIETY OF NEW ZEALAND 33 1 39 - 55 2003年03月 [査読有り]
     研究論文(学術雑誌) 
    Triassic Radiolaria are documented from phosphatic nodules obtained from the Karoro Formation and Potiki Siltstone from Kaka Point Structural Belt, Otago, New Zealand. There are abundant Glomeropyle and Spumellaria, and rare Nassellaria and Entactinaria. By comparison with radiolarian faunas from Japan, Thailand, European Tethys, and other Triassic strata in New Zealand, the Karoro Formation is correlated with upper Lower Triassic (Olenekian), older than the Potiki Siltstone. We believe that the fauna is strongly affected by non-Tethyan radiolarians based on the abundance of Glomeropyle, rare occurrence of Tethyan taxa, and the presence of many undescribed forms. Three new species are described herein: Glomeropyle bispinosa, G. campbelli, and Poulpus (?) caveaformis.
  • ヒ素に富む変質安山岩の環境岩石学的研究
    第13回環境地質学シンポジウム論文集 199 - 204 2003年
  • 環境岩石学によるファイトレメディエーション技術の実用化への展開-ヒ素に富む安山岩地域の開発を例として-
    第13回環境地質学シンポジウム論文集 205 - 210 2003年
  • A Takemura, Y Aita, RS Hori, Y Higuchi, KB Sporli, HJ Campbell, K Kodama, T Sakai
    NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS 45 3 289 - 296 2002年09月 [査読有り]
     研究論文(学術雑誌) 
    Triassic radiolarians are reported from two horizons in Waipapa Terrane at Arrow Rocks, Whangaroa area, Northland. This relatively undisturbed succession represents an ocean-floor sequence, consisting (in ascending order) of basalt with limestone layers, bedded chert, black shale, and red, maroon and green siliceous mudstone. The age of the lower part of the section is Middle-Late Permian. The radiolarian assemblages reported here indicate Early or Middle Triassic and Middle Triassic (Anisian) ages for maroon siliceous mudstones in the upper part of the section. Between strata of known Permian and Triassic age there is a thin potential Permian/Triassic boundary interval consisting of alternating black shale and grey chert. Radiolarian paleogeography indicates that the Arrow Rocks sequence experienced long distance plate tectonic displacement from a position of relatively low latitude in the Middle Permian and to a high latitude in mid-Triassic time.
  • 榊原正幸, 堀利栄, 大野一郎, 小松正幸
    安全工学研究発表会講演予稿集 34th 47 - 50 2001年11月
  • Unlooking the radiolarian record from the Mesozoic terranes of New Zealand: Investigating the southern high latitude paleoceanographic history
    The Palaeontological Society of JapanTopics in Paleontology 2 1 - 16 2001年
  • ニュージーランドの中生代テレーンに残された放散虫記録 ー南半球高緯度域の古海洋環境の解明をめざしてー
    日本古生物学会古生物学トピックス 2 1 - 16 2001年
  • ニュージーランド北島、ワイパパテレーンの放散虫化石
    日本古生物学会古生物学トピックス 2 17 - 24 2001年
  • 堀 利栄, 藤木 徹, 樋口 靖
    地質学論集 55 55 43 - 59 日本地質学会 2000年01月 
    付加体中に頻繁に含有される層状チャートの化学組成や同位体比は, チャートが堆積した場の環境や続成過程, また過去の大陸表面の化学組成や付加後のテクトニックなイベントを反映している.本論では層状チャートの化学組成や同位体比の解析例を示し, その問題点や将来性について議論した.REEやいくつかの主成分元素組成は, 層状チャートの珪質部と泥質部が濃度の差こそあれ同起源物質を含有していることを示しており, 珪質部は泥質部がSiO_2で希釈された部分とみなされる.さらに珪質部は, Sr同位体比による解析の結果, より初生的な情報を保持し易いことが示唆された.特に堆積場の酸化・還元状態は, 珪質部における一部の元素組成やS同位体比を用いることで解析可能であり, その一例としてFe^<2+>, Fe^<3+>の量比, AlやTi濃度で規格したMn, U, V比やS含有量をあげた.このような付加体堆積岩の環境解析において欠けてならない点は, 地球科学的な制約条件との整合性であり, 地球化学だけでなく他分野との総合的な議論が必要である.
  • 榊原 正幸, 堀 利栄, 木村 学, 池田 倫治, 甲本 智之, 加藤 宏海
    地質学論集 52 1 - 15 日本地質学会 1999年09月
  • Permian Albaillellaria(Radiolaria)from a limestone lens at the Arrow Rocks in the Waipapa Terrane(North land, New Zealand)
    Geodiversitas 21 4 751 - 765 1999年 [査読有り]
  • 酒井 豊三郎, 相田 吉昭, 樋口 靖, 堀 利栄, 小玉 一人, 竹村 厚司, 竹村 厚司, GRANT-MACKIE Jack, HOLLIS Chris, SPORLI K. Bernhard
    地質學雜誌 104 2 V - VI 日本地質学会 1998年02月 
    ニュージーランドには日本とよく似たチャート・砕屑岩を含む中・古生代の地質体が広く分布するが, 放散虫化石による生層序学的研究はようやく端緒に着いたばかりある. 我々は1995, 96年の2年にわたり, 国際学術研究 (代表: 酒井豊三郎)による, ニュージーランドの中生界を中心とした含放散虫岩の調査を行った. その結果のうち, ワイパパ, ムリヒク両テレーンの, 中生代南半球の極めて保存のよい放散虫化ヨを産するノジュールの産状を紹介する.
  • Preliminary report on the lithostratigraphy of the Arrow Rocks, and geologic age of the northern part of the Waipapa Terrane, New Zealand
    大阪微化石研究会放散虫研究集会論集 11 47 - 57 1998年
  • Masayuki Sakakibara, R. S. Hori, Michiharu Ikeda, Misa Umeki
    Journal - Geological Society of Japan 103 953 - 961 1997年12月 
    Green rock including chert xenoliths has been found in an outcrop of the Pippu area, central Hokkaido, Japan. It is petrologically divided into two types: massive hornblende basalt and picritic basaltic hyaloclastite. The former structurally overlies the latter. The hornblende basalt includes a large amount of chert xenoliths and was subjected to the high-P/T Kamuikotan metamorphism. Radiolarian fossils indicating late Callovian have been obtained from xenoliths of red chert in the hornblende basalt. The picritic basaltic hyaloclastite displays mineral assemblages corresponding to the prehnite-pumpellyite facies. The hornblende basalt is alkalic and rich in TiO2 and P2O5, being similar to oceanic island baslat, whereas picritic basalt is tholeiitic, but very poorer in TiO2 and P2O5 than oceanic ridge basalt. These data suggest that the hornblende basalt belongs to the Kamuikotan complex, whereas the picritic basaltic hyaloclastite is correlative with with Sorachi Group. The Kamuikotan green rocks is inferred to have been generated as intra-plate volcanism after late Calluvian.
  • 榊原 正幸, 堀 利栄, 池田 倫治, 梅木 美妙
    地質學雜誌 103 10 953 - 961 日本地質学会 1997年10月
  • RS Hori, JD Campbell, JA GrantMackie
    NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS 40 3 397 - 399 1997年09月 研究論文(学術雑誌) 
    Lower Jurassic Radiolaria are documented from Aratauran strata of the Murihiku Supergroup at the northern end of Sandy Bay, south of Nugget Point, Otago, New Zealand. The fossils were extracted from small carbonate nodules in fine grey sandstone in the middle part of the Aratauran sequence. The following genera were identified: Eptingium(?), Gigi, Hsuum, Orbiculiforma, Pantanellium, Paronaella(?), Poulpus(?), Saitoum, Spongostaurus(?), and Thetis. Comparison with radiolarian faunas of Europe, southwest Japan, and North America suggests that the study fauna is of Pliensbachian age, probably Early Pliensbachian, indicating the possibility that the Aratauran local stage, previously equated approximately with Hettangian-Sinemurian internationally, extends into the Early Pliensbachian.
  • 竹村 厚司, 相田 吉昭, 堀 利栄, SPORLI K. b., CAMPBELL H. j., 坂井 豊三郎
    形の科学会報 12 1 32 - 32 1997年06月
  • RS Hori
    MARINE MICROPALEONTOLOGY 30 1-3 159 - 169 1997年03月 研究論文(学術雑誌) 
    A drastic faunal turnover of radiolarians in the early Toarcian, termed the Toarcian Radiolarian Event (TRE), recognized in bedded chert sequences of southwestern Japan, is marked by the first co-appearance of the genus Praeparvicingula and Mesosaturnalis hexagonus and by high diversity among multicyrtids. The event resulted in the replacement of latest Triassic through earliest Jurassic taxa by Late Jurassic to Early Cretaceous taxa. At TRE levels in bedded cherts in southwestern Japan, the size of radiolarians decreased drastically, reworked conodont fossils appeared, and anoxic sediments (black cherts with FeS2 nodules) were deposited. The lithologic and faunal changes suggest that global marine environmental changes, including the occurrence of anoxia, caused the TRE.
  • 堀 利栄
    月刊地球 19 3 145 - 150 海洋出版 1997年03月
  • 池田 倫治, 掘 利栄, 榊原 正幸
    地質學雜誌 103 2 167 - 169 日本地質学会 1997年02月
  • Original relationship between basic rocks and chert of the Kmuikotan Complex in central Hokkaido, Japan
    2 107 - 115 1997年
  • 層状チャートの化学組成と堆積環境
    月刊地球 19 3 145 - 150 1997年
  • R. S. Hori, Y. Aita, J. A. Grant-Mackie
    Island Arc 5 2 104 - 113 1996年 研究論文(学術雑誌) 
    Well-preserved radiolarians from the Newcastle Group in southwest Kawhia, New Zealand, constitute the first record of Lower Jurassic radiolarians from in situ deposits in high latitudes of the Southern Hemisphere on the margin of Gondwana. The radiolarians were extracted from carbonate nodules from five horizons in the Rewarewa Formation and the lower part of the Arawhero Formation, in the Murihiku Terrane. The radiolarian-bearing sequence, which lies within the upper part of the type section of the local Aratauran Stage, is roughly datable as Hettangian-Sinemurian from rare ammonite occurrences. The radiolarian assemblages consist, on average, of 80-90% spumellarians and 10-20% nassellarians. Spumellarians include species of the following genera: Archaeotriastrum, Cnicella, Emiluvia (?) Homeoparonaella, Orbiculiforma, Pantanellium, Paronaella (?), Pseudocrucella, Pseudoheliodiscus, Spongostaurus and Spongotrochus. Nassellarians are composed of species of Bagotum, Bipedis, Droltus, Jacus (?) Perispyridium (?) Raoultius, Riedelius, Saitoum and Thetis. From data of Lower Jurassic radiolarian faunas of Europe, North America and Japan, the New Zealand fauna shows stronger affinity with those of the European Tethys such as Turkey (e.g. De Wever 1982) and the Northern Alps (Kozur & Mostler 1990) than with faunas from other areas of the circum-Pacific. This connection between the European Tethyan and New Zealand faunas is not well explained by presently accepted continental reconstructions (Smith et al. 1994) for the Early Jurassic.
  • 堀 利栄, 樋口 靖
    愛媛大学理学部紀要 2 27 - 36 愛媛大学 1996年
  • 吉崎正, 田村 洋子, 佐野 栄, 堀 利栄, 小松 正幸
    愛媛大学理学部紀要 2 15 - 25 愛媛大学 1996年
  • 樋口靖, 堀 利栄
    愛媛大学理学部紀要 2 1 - 14 愛媛大学 1996年
  • 堀 利栄, 榊原 正幸
    地質學雜誌 100 8 575 - 583 日本地質学会 1994年08月
  • Sakakibara Masayuki, Hori Rie S., Murakami Takayoshi
    地質學雜誌 99 10 831 - 833 日本地質学会 1993年10月 
    The Mikabu greenrocks extend more than 800 km in length in the outer zone of Southwest Japan. They are composed mainly of volcanic sedimentary rocks, basalts, dolerite, gabbro, and ultrabasic rocks, and are associated with minor limestone and chert. Recently, the Mikabu greenrocks have been interpreted to be accreted oceanic plateaus or seamounts. Red radiolarian chert xenoliths have been found in the Mikabu dolerite, Okuki area, western Shikoku. The paper discusses the geological significance of the fossil evidence constraining the formative age of the Mikabu greenrocks. -from Authors
  • 堀 利栄
    地質調査所月報 44 9 p555 - 570 経済産業省産業技術総合研究所地質調査所 1993年09月
  • Toarcian Oceanic Event in deep-sea sediments
    Geological Survey of JapanBulletin of the Geological Survey of Japan 44 9 555 - 570 1993年
  • ジュラ系下部におけるPantanelliidae科の産出頻度
    大阪微化石研究会誌 特別号 9号 101 - 108 1993年
  • G. Kimura, J. N. Ludden, J-P. Desrochers, R. Hori
    LITHOS 30 3-4 337 - 355 1993年 研究論文(学術雑誌) 
    One of the keys to understanding the origin of Archaean greenstone belts lies in the geological relationships between mafic and ultramafic greenstones, felsic to intermediate volcanic rocks and terrigenous sediments. Traditional models for greenstone belt evolution have been based on in-situ stratigraphic relationships. Most of these models, for example an oceanic island-arc developed on oceanic basement, back-arc basins, and the recently popular plume model, predict concordant stratigraphic relationships among the various greenstone belt lithologies. However, rather than being depositional in nature, several authors have indicated that many of the relationships between the different lithologies in greenstone belts are in fact tectonic, suggesting an allochthonous origin for most greenstone sequences. All of these latter models make analogies to Phanerozoic tectonic processes involving accretion of oceanic materials with volcanism related to both plate subduction and rifting. In this paper, we have evaluated the geological relationships between volcanic rocks and sediments in three regions in the Superior province, where the accretion of oceanic material can be documented, and direct comparisons are made to geological processes in Phanerozoic accretionary complexes. In the Malartic area in the southeastern Abitibi Subprovince, 3 to 4 km thick slices of komatiite and tholeiite, with intercalated terrigenous sediment, are tectonically imbricated and are overlain by calc-alkaline volcanics which postdate tectonic stacking. In both the Larder Lake region of the southwestern Abitibi belt and in the Beardmore-Geraldton belt, at the south-eastern limit of the Wabigoon belt, slices of iron-rich tholeiite and chemical sediments of an oceanic origin are tectonically imbricated with terrigenous sediment. The Malartic-Val d'Or area is considered to be an example of accretion of an Archaean oceanic plateau, while the Larder Lake and the Beardmore-Geraldton regions are potentially typical of accretion of normal oceanic crust in an arc-environment. Phanerozoic accretion of oceanic crust is accompanied by a step-back in subduction, and in this paper we suggest that oceanic crust accretion may have been the principal mechanism by which the locus of subduction migrated towards the south of the Superior province. Asthenospheric upwelling associated with the isolated sinking plate may have been responsible for widespread late-magmatism. This scenario requires that magmas be erupted through previously accreted volcanic, plutonic and sedimentary material. Furthermore, later ridge subduction will result in transpressional tectonics and eruption of mafic sequences over mature and immature volcano-plutonic sequences. The combined result of the plate tectonic scenario envisaged would result in the well-described "cyclic stratigraphy" of many granite greenstone sequences. © 1993.
  • Katsumi Kimura, Rie Hori
    Journal of Structural Geology 15 2 145 - 161 1993年 研究論文(学術雑誌) 
    Detailed structural and biostratigraphical analysis of the Jurassic Inuyama Sequence, a coherent chert-clastic complex in the Mino-Tamba Belt, central Japan, clarifies the evolution of accretionary processes at shallow structural levels. The Inuyama Sequence is characterized by a series of stacked thrust sheets. Each sheet consists of an Early Triassic to Middle Jurassic oceanic plate stratigraphy composed of four lithologic units which are, in ascending order: siliceous claystone ribbon chert siliceous mudstone and clastic rocks. The structural features of the Inuyama Sequence demonstrate a four-stage progressive deformation. (1) A décollement was initiated within the siliceous mudstone when this sequence was just seaward of the deformation front. Clastic dikes and sills formed at the horizon just above the décollement at this time. (2) The stratigraphic section above the décollement was imbricated by in-sequence thrusting in the frontal part of the wedge. This initial stage of thrusting and imbrication was followed by (3) the formation of duplex structures with fault-related folds within the lower stratigraphic section as the décollement stepped down-section to the lowest siliceous claystone interval. Finally, (4) these thrust packages were overprinted by secondary prism thickening in the form of out-of-sequence thrust faulting. © 1993.
  • 深海堆積物中のToarcian事変
    地質調査所地質調査所月報 44 9 555 - 570 1993年
  • Rie S. Hori, Chang‐Fee Cho, Hiroyuki Umeda
    Island Arc 2 3 170 - 180 1993年 研究論文(学術雑誌) 
    Abstract The abundance of magnetic microspherules in a Triassic‐Jurassic continuous sequence of alternating chert and shale beds in the Mino accretionary complex, central Japan, was measured systematically. Depending on time, the magnetic microspherules extracted from shale beds change in abundance considerably from the minimum 0.9ppm/cm3 at latest Triassic (ca 208Ma) and the maximum 75ppm/cm3 at late Early Jurassic (ca 187Ma) however, the abundance is always higher approximately 10–100 (average 70) times than those from adjacent chert bed at any stratigraphic horizon. Such systematic difference reveals the origin of radiolarian bedded chert as cyclic‐rapid accumulation of biogenic SiO2 under extremely slow accumulative environments of shale with probable aeolian dust in origin. The accumulation data for individual shale and chert beds were obtained based on the microspherule abundance and radiolarian biostratigraphy, i.e., ca 0.018g/cm2Ka for lower Jurassic shale beds and ca 1.9g/cm2Ka for adjacent chert beds. Duration time to make a chert‐shale couplet corresponds to a dominantly 15–20Ka interval (average 23 Ka) in Upper Triassic bedded cherts with a low paleolatitude, whereas a 40–45 Ka interval (average 42 Ka) in Lower Jurassic ones which may been formed in higher latitude than Triassics before the final accretion to the Asian continental margin. Depending on paleolatitude, the cyclicity of 23 and 42 Ka may correspond to Milankovitch cycles which have been well documented in deep‐sea sediments. Copyright © 1993, Wiley Blackwell. All rights reserved
  • R. Hori
    Journal of Geosciences, Osaka City University 35 Art.4 53 - 65 1992年12月 
    Vertical distribution of microfossils such as radiolarians and conodonts across the Triassic/Jurassic (T/J) boundary were clarified through the biostratigraphic study of two continuous sequences of bedded cherts in the Inuyama area, central Japan. Three types of taxons were recognized around the T/J boundary, (1) Upper Triassic type such as Squinabolella, (2) Upper Triassic-Lower Jurassic type such as Canoptum, and (3) transition type (possibly earliest Jurassic tye) such as Parahsuum and Bipedis. The radiolarian fossils changed gradually, not drastically, from Triassic type into Jurassic ones during the interval (c7 m.y.) from the extinction of conodonts to the first appearance of a species of Bagotum. -Author
  • The Batinah Olistostrome of the Oman Mountains and Mesozoic radiolarians
    News of Osaka Micropaleontologists, Special Volume 8 21 - 34 1992年
  • オマーン山地のバテナオリストストロームと中生代放散虫化石
    大阪微化石研究会大阪微化石研究集会論集 8 21 - 34 1992年
  • 層状チャートのリズムとその起源について
    月刊地球 13 8 543 - 551 1991年
  • 地球史を通じた大陸の平均化学組成の変化と超大陸の形成・分裂
    月刊地球 13 6 428 - 440 1991年
  • 丸山 茂徳, 磯崎 行雄, 堀 利栄
    科学 60 10 p628 - 637 岩波書店 1990年10月
  • 堀 利栄
    日本古生物学會報告・紀事 新編 1990 159 562 - 586 日本古生物学会 1990年 
    西南日本のチャート及び泥岩からなる連続層序断面において放散虫化石の垂直分布を調査し, 4群集帯と4亜群集帯を最上部トリアス系から中部ジュラ系下部の間に設定・記載した。記載した化石帯は, 下位よりParahsuum simplum群集帯及びその4亜群集帯(Subzones I-IV)と, Mesosaturnalis hexagonus群集帯(新提唱), Parahsuum (?) grande群集帯, Hsuum hisuikyoense群集帯である。アンモナイト化石帯と直接対応のつく北米やトルコのデータとの比較により, 各群集帯の年代は, Rhaetian/HettangianからBajocianまでの間にそれぞれ位置づけられる。新たに設定したMesosaturnalis hexagonus群集帯は, Parvicingula属(広義)の出現や多様な小型塔状Nassellariaの産出で特徴づけられ, 西南日本だけでなく北米においても本群集帯に対応する化石帯が識別される。
  • Hori Rie, Otsuka Tsutomu
    Journal of geosciences Osaka City University 32 32 175 - 199 大阪市立大学 1989年03月 
    This paper focuses on the late early Jurassic radiolarian assemblage of bedded cherts and siliceous mudstones in the Mt. Norikuradake area, central Japan. Nine multi-segmented nassellarians of the assemblage including two new species, are described herein. They belong to the genera Hsuum, Parahsuum and Parvicingula and are characterised by forms possessing features of both Parahsuum and Hsuum, with also a form of Parvicingula having small tests. The assemblage containing these taxa, recognisable in various localities in Southwest Japan and North America, is regarded as a fauna of the transitional period from early Jurassic to middle Jurassic forms. This assumption is based on a consideration of the morphology of its component species. On the basis of its biostratigraphic position and faunal content, the assemblage is probably to be dated to a certain time in the late Early to early Middle Jurassic, at least including Toarcian time. -Authors
  • Some characteristic radiolarians from Lower Jurassic bedded cherts of the Inuyama area, Southwest Japan
    Transactions and proceedings of the Palaeontological Society of Japan, New Series 151 543 - 563 1988年
  • R. Hori, A. Yao
    Journal of Geosciences, Osaka City University 31 Art.3 47 - 61 1988年01月 
    Parahsuum is a characteristic genus of Jurassic Radiolaria. In this paper, four species of Parahsuum, Parahsuum simplum Yao and three new species, are described from chert sequences of the Inuyama area, central Japan. From the stratigraphic horizons of their first occurrences and their morphologic features, the phylogenic relationships among P. simplum and two of the three new species are considered.-Authors
  • 堀 利栄
    日本古生物学會報告・紀事 新編 1988 151 543 - 563 日本古生物学会 1988年 
    Syringocapsidae科3属に属する4種を犬山地域の下部ジュラ系チャート層より記載した。これら4種の属するKatroma属, Syringocapsa属, Gigi属は, 形態上の共通点が多い。本論では, それぞれの相違を明確にした上で3属の系統関係を考察した。記載した種は, Katroma kurusuensis, Syringocapsa coliformeの2新種とKatroma sp. N, Gigi sp. aff. G. fustisである。K. kurusuensisとS. coliformeの産出範囲は, 共産するコノドントや放散虫化石からそれぞれSinemurianからPliensbachian, RhaetianからSinemurian?と推定される。下部ジュラ系に産するKatroma属は, 北米, ギリシア, トルコ, ソ連東部などから報告されており, 西南日本ではParahsuum simplum群集帯(Lower Jurassic)の上部に産する。よって, この属に属する種は, 化石帯の国際対比をする上で重要である。Parahsuum simplum群集帯上部は, これらの産出層準から判断すれば, 北米のPessagnoら(1987)のZones 04-01, Murchey (1984)のMH-1, ソ連東部のTikhomirova (1985)によるKatroma (?) cf. bicornus-Lithocampe sichotica Complexにそれぞれ対応し, その年代は少なくともSinemurian後期からPliensbachian後期にわたると推定される。

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受賞

  • 2010年 優秀講演賞
     JPN
  • 2007年 ポスター賞
     JPN
  • 2007年 Poster Award
  • 2006年 学生奨励賞
  • 2006年 Student Award

共同研究・競争的資金等の研究課題

  • 地質時代境界事変のペースメーカーとしての天文周期
    日本学術振興会:科学研究費助成事業 基盤研究(B)
    研究期間 : 2019年04月 -2023年03月 
    代表者 : 池田 昌之, 堀 利栄, 後藤 孝介
  • 四国非火山性温泉組成による地殻変動予測への挑戦
    日本学術振興会:科学研究費助成事業 挑戦的萌芽研究
    研究期間 : 2016年04月 -2020年03月 
    代表者 : 堀 利栄, 山本 明彦
     
    昨年度に引き続き、東道後温泉および道後温泉源泉のpH変動および泉温変動の連続観測を実施した。道後温泉観測については、1年間の継続データを取っている。その結果、温泉水のpH値変動は、昨年度の結果と同様に数ヶ月単位に及ぶ長期的な変動を示した。また、これまでの結果と同様にFFT法、Marple法、存否法などの解析によって、泉温のpH値変動が1日や半日の潮汐振動周期とよく一致することが示されており、その原因解明のための研究方策を検討した。モニタリングしている観測地のデータロガー設置場所の気温についても同様な手法で解析した結果、pH値と同様な周期変動を示していることが判明している。気温の周期的変動要因の解明のため(メカニカルな要因か、自然現象的な要因か、気温センサーの気圧依存性など)、観測室に気圧計を設置することを検討した。設置については、許可の関係上、次年度になる予定である。2019年度には、気圧変動及び、観測地の気温変動、pH値変動、泉温変動を統合して解析し、最終的な検討結果を年度中には得られる事と期待している。 2018年度には、研究協力者を招聘して観測値解析のための会合を2度程愛媛大学にて開催した。また、東道後温泉における観測機器の更新の必要性を確認した。その結果、新たに東道後温泉においてはpH値だけでなく、泉温連続測定も可能な機器を設置する事を検討した。最終的に、地権者の設置許可や機器の選定・納品の関係で、検討していた観測機器設置は2019年度初頭に延期することになった。
  • 日本学術振興会:科学研究費助成事業 基盤研究(A)
    研究期間 : 2015年04月 -2019年03月 
    代表者 : 鈴木 勝彦, 松岡 篤, 堀 利栄, 石川 晃, 尾上 哲治, 黒田 潤一郎, 関根 康人, 澤木 佑介
     
    本研究成果により,(1)顕生代の保存状態のよい堆積岩試料の化石による詳細な解析が進み,年代制約が大きく進展した。例えば,国内で新たなジュラ紀-白亜紀境界層の発見に至るなどの成果が得られた。(2)チャート層を1枚ずつ同位体分析することが可能になり,高年代解像度で変動を追うことが可能となった。その成果の1つとして,後期三畳紀の堆積岩のストロンチウム,オスミウム同位体の上昇から,パレオテチス海の収縮に伴う造山運動が環境変動を引き起こすことが明らかになるなど多くの成果が得られた。(3)上記の成果の融合により,大量絶滅や環境変動などを引き起こす原因となったイベントをより確実に示すことが可能となった。
  • 日本学術振興会:科学研究費助成事業 基盤研究(C)
    研究期間 : 2013年04月 -2016年03月 
    代表者 : 堀 利栄, 小玉 一人, 池田 昌之
     
    過去の海洋酸性化の記録から, どのように海洋が元の状態へ復帰していったかを明らかにするため、本邦美濃帯犬山地域、秩父帯明浜地域、ニュージーランド・ワイパパ帯、トルコ・アンタルヤ地域の遠洋三畳系―ジュラ系境界層を学際的に検討した。その結果、三畳紀最末期の海洋酸性化の後、海洋中和過程を示唆する異常組成層準が発達し、微化石生物相の移り代わりが短期間(<10万年)に起こるという現象が汎世界的に識別され、海洋中和・回復過程に関する新たな知見が得られた。
  • 日本学術振興会:科学研究費助成事業 基盤研究(B)
    研究期間 : 2007年 -2009年 
    代表者 : 榊原 正幸, 井上 雅裕, 佐野 栄, 堀 利栄, 西村 文武
     
    本研究では,カヤツリグサ科ハリイ属マツバイなどの有害金属に対する重金属超集積植物を用いたファイトレメディエーション技術を実用化するため,スクリーニング調査,ラボ実験,室内・温室栽培実験,フィールド実験およびエンジニアリング設計ならびに経済性評価を行った.その結果,マツバイを用いたファイトレメディエーションが重金属汚染された土壌・水環境の浄化に有効であることが明らかになった.
  • 日本学術振興会:科学研究費助成事業 基盤研究(C)
    研究期間 : 2007年 -2009年 
    代表者 : 堀 利栄, 小玉 一人, 池原 実, 黒田 潤一郎
     
    三畳紀は、古生代末の大量絶滅後に海洋環境が大きく中生代型へと変換した時代と考えられている。本研究では、本邦とニュージーランドにおける三畳系の深海堆積物を検討し、従来提唱されている数より多くの海洋貧酸素事変(OAE)が起こっていたことを突き止めた。それらは、三畳紀初期では少なくとも3回、三畳紀後期に1回、発生していた事が明らかになった。また、OAEの発現と持続期間は、同じ海洋でも場所によって異なり、炭素同位体比に記録された炭素循環変動と関係がある事が判明した。
  • 微化石層序に関するグローバルスタンダードの構築 -T/J境界-
    日本学術振興会:科学研究費助成事業 基盤研究(C)
    研究期間 : 2001年 -2002年 
    代表者 : 堀 利栄, 鈴木 紀毅, 松岡 篤
     
    本課題研究では,三畳紀/ジュラ紀(T/J)境界を放散虫微化石層序で決定するためのグローバルスタンダードの構築を目的に,総合研究をおこなった.以下にその結果をまとめる. 1)従来明確に識別できなかったジュラ紀最前期Hettangianの指標種として,Pantanellium tanuenseが最適であることが判明した.また,Archaeocenosphaera laseekensis, Praehexasaturnalis tetraradiatusもよい指標種になりえる. 2)三畳紀末の指標としては,Globolaxtorum tozeriおよびHagiastrid? gen. et sp. indet Aの消滅が指標になることが判明した.また,Risella属の絶滅もよい指標となる. 3)ほとんどの種が絶滅するT/J境界をこえて産出する化石種Spongotrochus sp. (Carter 1994), Canoptum spp.を確認した.Canoptum属は,現生放散虫の観察と形態解析に基づいて、食性の違いによって絶滅に対する耐性を獲得した可能性が示唆される. 4)上記特徴種を含む放散虫フォーナの消滅・出現は,日本(犬山地域)およびカナダ(クイーンシャーロット諸島)において,優先種や含有量の違いがあるにもかかわらず,同様のパターンを示す.その変化パターンは,3段階にわけられることが判明した. 5)日本,フィリピン,ニュージーランド,カナダの4地域の比較検討によって,フィリピンの放散虫フォーナは日本のT/J境界フォーナと類似し,ニュージーランドのフォーナは,カナダのフォーナと類似していることが判明した.
  • ニュージーランドとロシアにおける中生代高緯度帯放散虫群集の起源と進化について
    日本学術振興会:科学研究費助成事業 基盤研究(B)
    研究期間 : 2000年 -2002年 
    代表者 : 相田 吉昭, 山北 聡, 竹村 厚司, 酒井 豊三郎, 小玉 一人, 堀 利栄
     
    ニュージーランド北島及び南島においてペルム紀〜ジュラ紀の放散虫を含む遠洋性-半遠洋性堆積物層について地質調査を行い,高緯度海域を特徴づける放散虫群集を各時代毎に採集して古生物学的研究を行った. 1.ワイパパテレーンに属するアローロックス島の層序の再検討を行い,P/T境界をはさむ上部ペルム系から下部三畳系の詳細な岩相柱状図を作成し単層毎の岩相対比を行った.コノドント化石の検討に基づいて,多数の層準から三畳紀前期のコノドントが確認され,特に最下部Dienerian〜Smithianについては,Ns.kummeli, Ns.cristagalli, Ns.pakistanensis, Ns.waageniなどの各化石帯を特徴づける種の産出が確認された.三畳紀前期から中期の高緯度型放散虫群集がアローロックスセクションから産出することが明らかになった. 2.ワイパパテレーンに属するスティーブンスン島,カバーリ諸島モツカワヌイ島やベイオブアイランズ地域の島々,及びプケティフォレストの地質調査を行い,微化石に基づいてチャートや緑色珪質泥岩層などの岩相-年代関係を検証して高緯度型放散虫群集が新たに産出することを明らかにした. 3.オークランド地域のパキヒ島とポヌイ島の地質調査を複数回実施し,パキヒ島では三畳紀-ジュラ紀(T/J)境界を含む遠洋性の赤色チャート層を多数採集した.ポヌイ島では緑色珪質泥岩層中のリン酸塩ノジュールの数層準からジュラ紀中後期の保存良好な高緯度型放散虫群集を初めて検出する事ができた.ポヌイ島の緑色岩の産状を明らかにして,化学分析用試料を採集した. 4.南半球高緯度型放散虫群集との比較のため,ロシアのモスクワ周辺及びウリアノフスク地域の後期ジュラ紀〜後期暁新世の地層について地質調査を実施して,北半球高緯度型放散虫群集を含む試料を各年代毎に採集した.
  • ニュージーランドにおける中生代および新生代の含放散虫岩の地質学的研究-とくに南半球高緯度帯放散虫の進化と変遷
    日本学術振興会:科学研究費助成事業 国際学術研究
    研究期間 : 1995年 -1996年 
    代表者 : 酒井 豊三郎, HOLLIS Chris, GRANTーMACKIE ジャック エイ, SPORLI K.Ber, 榊原 利栄, 竹村 厚司, 小玉 一人, 相田 吉昭, GRANTーMACKIE ジャック エイ.
     
    放散虫化石群集から汎世界的な古海洋環境や古生物地理区を特定しようとするためには,高緯度帯や低緯度帯のエンドメンバーを示す放散虫群集の特性を明らかにすることが必須である.我々は中生代から新生代にかけての高緯度帯の放散虫化石群集の内容を明らかにすること,また古地磁気学的手法による古緯度の推定を行うことを目的として,現地調査および研究を行ってきた.平成7〜8年度にかけて,三畳紀・ジュラ紀・白亜紀〜古第三紀を中心に下記の地域で調査研究を行っており,その研究結果の概要を報告する. 1.北島のWhangaroa地域(Waipapa Terrane) (1)Mahinepua半島:層状チャートから珪質頁岩,泥岩を経て塊状砂岩に到る地層で,チャートは上部ペルム系から三畳系と推定さ,珪質頁岩の下部には中期三畳紀,珪質頁岩の上部からは後期三畳紀の高緯度型と考えられる放散虫群集がリン酸塩ノジュールから産出した.とくに南島のCaples Tarraneの中部三畳系から知られているpylomeを持つ高緯度帯に固有な種が,北島のWaipapa Terraneからも産出することが初めて明らかになった. (2)Arrow Rocks島:熔岩,インターピロ-石灰岩,珪質擬灰岩・層状チャートから紫色〜緑色珪質頁岩に到る連続性の良い地層で,熔岩とインターピロ-石灰岩は上部ペルム系,層状チャートは上部ペルム系〜三畳系ではないかと考えている.現在,平成8年度11〜12月に採集した試料を分析中であり,詳細な年代と放散虫化石の群集特性に関するデータは今後得られる予定である. 2.北島のWaiheke島(Waipapa Terrane) 北西部海洋(Fossil Bay周辺):三畳系とジュラ系のユニットが,構造的に繰り返して露出していることが判明した.その一つは枕状熔岩,層状チャートから珪質頁岩に到る地層で,層状チャートの上部はジュラ系,下部の黒色チャートから保存良好なSpumellariaからなる放散虫群集が産出した.珪質頁岩からはジュラ系中部の高緯度帯型放散虫群集が多産することが明らかになった.また黒色チャートの古地磁気学的予察結果は高緯度を示すデータが得られている.もう一方のユニットは青灰色泥岩と灰色砂岩で構成され,リン酸塩ノジュールから後期三畳紀の放散虫群集が得られた. 3.北島のKawhia地域(Murihiku Terrane) (1)上部Ururoan階の模式層であるUruroa層はシルト岩・砂岩互層からなり,中部にはDactylioceras bedを挟むことで知られている.このマーカー層から上位70mまでのシルト岩部には随所に径1-2cmの石灰質ノジュールが挟まれ,保存良好なジュラ紀中期の放散虫化石を多産する.コスモポリタンな高緯度型とは言い切れない群集組成の放散虫を産出する. (2)ジュラ系下部のRewarewa層,Arawhero層はシルト岩・砂岩・擬灰岩からなる地層で,径3-4cmの石灰質ノジュールを挟んでいる.擬灰岩層の古地磁気学的予察結果は比較的に高緯度を示すデータが得られている.ジュラ紀初期の放散虫化石群集組成はSpumellariaに属する種が優勢であり,Perispyriium属を多産する. 4.南島のNelson地域(Maitai Terrane) Wairoa River河岸:三畳紀前期(アンモナイトによる)の珪質頁岩中のリン酸塩ノジュールから放散虫が産するが,形態的多様性が少なく群集組成の特性を明らかにするのは今後の課題である. 5.北島のWairarapa地域 上部白亜系〜古第三系の地層について,地質調査及び古生物学的調査を行った.放散虫化石層序を明らかにする目的で,テカウカポイント,フアトキトキ川,カイファタ川の3つのセクションにおいて詳細な柱状図を作成し,放散虫用試料と古地磁気測定用試料を多数採集した.
  • 島孤高温型変成帯の形成過程と上昇テクトニクス
    日本学術振興会:科学研究費助成事業 基盤研究(A)
    研究期間 : 1994年 -1996年 
    代表者 : 小松 正幸, 榊原 利栄, 川嵜 智佑, 柳 哮, 鈴木 和博, 在田 一則, 豊島 剛志
     
    1.日高変成帯の研究.グラニュライト層における砂泥質片麻岩の部分溶融・ト-ナル岩質マグマの形成条件とプロセスが解析され,島弧火成活動帯の下部地殻における熱構造と火成活動-変成作用の交互関係が提案された.これと関連し,地殻の流動と上昇プロセス・地殻規模のデコルマンの形成深度とそれを規制する要因として,どの深さで部分溶融が始まるかが基本的要因であることが提示された. 2.領家変成帯の研究.変成岩の主要分布地域において原岩層序・構造・変形-変成作用の調査研究が推進され,つぎのことが明らかになった.1)原岩はチャート砕屑岩シークエンス,砂泥整然互層,ブロ-クンフォーメイション,メランジュからなり,ジュラ紀付加体の構成に対応するが,部分的に後者には含まれない岩相が存在する.2)D1(flattening),D2(local shearing with prograde metamorphism),D3(local shearing with retrograde),D4(shortening and upright folding)の変形一変成史をもつ.また,変成作用の熱源が古期花崗岩体の貫入によることが熱構造の解析から明らかにされた.一方,CHIMEモナザイトの年代測定によって変成年代(100Ma),花崗岩は95Maから80Maまで連続的に活動したことが明らかにされた.古期と新期の活動は連続的であり,西部から東部へ変成帯は連続的に上昇した. 3.肥後変成帯がグラニュライト相に達し,部分溶融を伴っていることが明らかにされた.さらに,サフィリン・コランダム・シソ輝石をもつ変成岩ブロックが蛇紋岩中に見いだされ地殻下部のレスタイトとして注目された.肥後片麻岩の年代は250Maを示し,さらに100Ma前後に領家変成作用の熱的影響を重複して受けていることが判明した. 4.付加体の堆積岩の後背地と起源,付加体の変形構造と熱構造,付加体形成場の構造条件について新しい進展があった(成果報告書参照)
  • テチス域におけるジュラ紀古世放散虫化石の群集変化
    日本学術振興会:科学研究費助成事業 奨励研究(特別研究員)
    研究期間 : 1990年 -1990年 
    代表者 : 堀 利栄
  • 放散虫化石および深海堆積物における古環境の復元
  • Palaeoenvironmental study of Radiolaria and deep-sea sediments
  • Palaeoenvironmental study of Radiolaria and deep-sea sediments

委員歴

  • 2018年 - 現在   日本地質学会   代議員
  • 2016年 - 現在   日本惑星科学連合   ダイバーシティ推進委員会
  • 2007年 - 2009年   日本地質学会   評議員   日本地質学会
  • 2007年   日本地質学会   男女共同参画委員会委員長   日本地質学会
  • 2005年   日本地質学会   代議員   日本地質学会

担当経験のある科目

  • 地質学入門愛媛大学
  • 最新地球惑星科学愛媛大学
  • 新入生セミナーA, B愛媛大学
  • 地球科学野外実習II愛媛大学
  • 博物館実習I愛媛大学
  • 地質学特論愛媛大学大学院
  • 地質学概論愛媛大学

社会貢献活動

  • 『化石の日』イベント・ギャラートーク
    期間 : 2018年10月15日 - 2018年10月15日
    役割 : 企画
    主催者・発行元 : 愛媛大学理学部・愛媛大学ミュージアム
    イベント・番組・新聞雑誌名 : 「異常巻きアンモナイト ニッポニテス・ミラビリスの謎」
  • 「日本の石」及び「愛媛大学が発見した鉱物」展
    期間 : 2017年08月20日 - 2017年12月12日
    役割 : 企画
    主催者・発行元 : 愛媛大学理学部・愛媛大学ミュージアム
    イベント・番組・新聞雑誌名 : [日本の石」及び「愛媛大学が発見した鉱物」展

その他

  • 2019年05月 - 2019年05月  ダイバーシティ推進のためのJpGUセッション企画・実施 
    JpGUにおいて、AGU-EGU-JpGU Union sessionとして「地球惑星科学分野の ダイバーシティ推進状況~ 国際的な視点から ~」(Gender Topics) をコンビナーの一人として立ち上げ、実施した。
  • 2018年02月 - 2018年02月  日本古生物学会 第167回例会 シンポジウム「ゴンドワナ生物相—その進化と特異性—」 
    日本古生物学会 第167回例会. (2018年2月2日) 愛媛大学城北キャンパス 南加記念ホールで開催された特別シンポジウムを企画しコンビナーとして参加した。

愛媛大学教員活動実績

教育活動(B)

担当授業科目(B01)

  • 2019, 前期, 学部, 地質学概論
  • 2019, 前期, 学部, 地球科学野外実習Ⅰ
  • 2019, 前期, 学部, 地球科学野外研究
  • 2019, 前期, 学部, 地球科学機器分析実習
  • 2019, 前期, 学部, 地球科学特別演習Ⅰ
  • 2019, 前期, 学部, 地球科学特別演習Ⅱ
  • 2019, 前期, 学部, 卒業研究Ⅰ
  • 2019, 前期, 学部, 卒業研究Ⅱ
  • 2019, 前期, 修士, 地質学特論
  • 2019, 前期, 修士, 地球科学高等実験Ⅰ
  • 2019, 前期, 修士, 地球科学高等実験Ⅱ
  • 2019, 前期, 修士, 地球科学高等実験Ⅴ
  • 2019, 前期, 修士, 地球科学高等実験Ⅵ
  • 2019, 前期, 修士, 地球科学フィールド高等実習Ⅰ
  • 2019, 前期, 修士, 地球科学フィールド高等実習Ⅲ
  • 2019, 前期, 修士, 地球科学プレゼンテーション特別実習Ⅰ
  • 2019, 前期, 修士, 地球科学プレゼンテーション特別実習Ⅲ
  • 2019, 前期, 修士, 地球科学ゼミナールⅢ
  • 2019, 前期, 修士, 地球科学プレゼンテーション特別実習Ⅱ
  • 2019, 前期, 修士, 地球科学フィールド高等実習Ⅱ
  • 2019, 前期, 修士, 地球科学高等実験Ⅲ
  • 2019, 前期, 学部, 地質学概論
  • 2019, 前期, 学部, 地球科学野外実習I
  • 2019, 前期, 学部, 地球科学野外研究


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