Session Details
[2poster54-85]T13. Regional geology and stratigraphy: Progress and Review
Mon. Sep 15, 2025 1:30 PM - 3:00 PM JST
Mon. Sep 15, 2025 4:30 AM - 6:00 AM UTC
Mon. Sep 15, 2025 4:30 AM - 6:00 AM UTC
T13_poster(General Edu. Build.C, 1-2F)
[T13-P-1]Paleosol study in the Indus Group, Ladakh Himalaya, NW India: Reconstruction of paleoclimate records in the Asia-India collision zone
Kohki Yoshida1, Subhadeep Kumar3, Masaaki Shimada4, *Haruki Sugiyama2 (1. Faculty of Science, Shinshu University, 2. Graduate School of Medicine, Science and Technology, 3. DMT Consulting Private LTD, 4. Graduate School of Science and Technology)
[T13-P-2]Sedimentary environment and paleoclimate record in paleosols since the Miocene to Pleistocene period in the Thakkhola region, southern Tibetan Plateau, Nepal
Masaaki SHIMADA1, *Nozomi Hatano2, Bishow Silwal3, Babu Ram Gyawali4, Shoji Mizuki1, Kohki Yoshida3 (1. Shinshu University Graduate School of Science and technology, 2. Faculty of Science, Niigata University, 3. Faculty of Science, Shinshu University, 4. Pokhara University)
[T13-P-3]Sedimentary process of Triassic limestone conglomerates in the Phetchabun area, central Thailand.
*Yoshihito KAMATA1, Naomi MARUYAMA2, Katsumi UENO3, Thasinee CHAROENTITIRAT4, Apsorn SARDSUD5 (1. Institute of Life and Environmental Sciences, University of Tsukuba, 2. Graduate School of Science and Technology, Master's Program in Geosciences, 3. Department of Earth System Science, Faculty of Science, Fukuoka University, 4. Department of Geology, Faculty of Science, Chulalongkorn University, 5. Department of Mineral Resources, Thailand)
[T13-P-4]Sedimentological Comparisons among the Birimian Volcanic Sequences Occurred in the Southern Ashanti Greenstone Belt, Southwestern Ghana
*Satoshi Yoshimaru1, Shoichi Kiyokawa1, Takashi Ito2, Kwabina Ibrahim3, George M. Tetteh4, Frank K. Nyame3 (1. Kyushu Univ., 2. Ibaraki Univ., 3. The University of Ghana, 4. University of Mines and Technology)
[T13-P-5]Provenance change of Permian clastic rocks in the southwestern South Kitakami belt, Northeast Japan
*Keisuke SUZUKI1, Hiroki TAKIGAWA2 (1. Geological Survey of Japan, Research Institute of Geology and Geoinformation, AIST, Tsukuba, Japan, 2. Department of Geology, Faculty of Science, Niigata University, Niigata, Japan)
[T13-P-6]Whole-rock major elements composition of the Kumenan body of the Yakuno Ophiolite
*Keiichiro MAE1, Yousuke Noumi2, Yuta Tsuchiya2 (1. Okayama University of Science Department of Life Science and Engineering research, 2. Okayama University of Science)
【ハイライト講演】 舞鶴帯には古生代後期に形成された「夜久野オフィオライト」が知られているが，この形成史や古生代末期の東アジア周辺発達史については未解明な部分が多い．この研究では久米南岩体に産する変斑れい岩，ドレライト・玄武岩，トーナル岩の全岩化学分析にもとづいてマグマの起源や系列について論じるものである． ※ハイライト講演とは．．．
[T13-P-7]Re-examination of the Ichinose Group of the Maizuru Southern Terrane in the Maizuru area, northern part of Kyoto Prefecture, Southwest Japan
*Yoshiaki SUGAMORI1, Mayuka YANAGISAWA1 (1. Tottori University)
[T13-P-8]Discovery of a mega-fossil assemblage from the Lower Carboniferous Kakisako Formation in Izumi Town, Kumamoto Prefecture, Japan.
*Yuuki SEKITANI1, Gengo TANAKA1 (1. Kumamoto Univ.)
[T13-P-9]Zircon U–Pb geochronology of the Hida Belt, Japan: Continental growth history at the margin of East Asia
*Raiki YAMADA1, Mitsuhiro NAGATA2, Hikaru SAWADA3, Sota NIKI4, Yasuhiro OGITA5, Wataru OUCHI6, Shinnosuke AOYAMA6, Takafumi HIRATA7 (1. National Institute of Advanced Industrial Science and Technology, 2. Nihon University, 3. University of Toyama, 4. Nagoya University, 5. Japan Atomic Energy Agency, 6. Niigata University, 7. University of Tokyo)
[T13-P-10]Timing of mylonitization based on zircon U–Pb ages of the Ryoke Plutonic Rocks in the eastern Kii Peninsula: A case study in the Tsukide area, Mie Prefecture
*Makoto TAKEUCHI1,2, Sakurako YABUTA1, Qi LI2, Yoshihiro ASAHARA2 (1. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 2. Graduate School of Environmental Studies, Nagoya University)
[T13-P-11]Timing of mylonitization based on zircon U–Pb ages of the Ryoke Plutonic Rocks in the eastern Kii Peninsula: Geological structure of 75 Ma mafic to intermediate rocks and granite rocks in the southern Misugi area, Mie Prefecture
*Yuto HIGAKI1, Makoto TAKEUCHI1,2, Qi LI1, Yoshihiro ASAHARA1 (1. Graduate School of Environmental Studies, Nagoya University, 2. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST))
【ハイライト講演】 中央構造線そいの領家深成岩類のマイロナイト化形成史はK-Ar年代で復元されてきたが，新規貫入岩による若返りがありえるため複数回のマイロナイト化は検出しそこなう可能性がある．この研究では若返りを拾いにくいジルコンU-Pb年代を測定することによって高精度の火成活動史や変形史を考察するものである． ※ハイライト講演とは．．．
[T13-P-12]Timing of mylonitization based on zircon U–Pb ages of the Ryoke Plutonic Rocks in the eastern Kii Peninsula: A case study in the Iinan area, Mie Prefecture
*Qi LI1, Makoto takeuchi1,2, Yoshihiro ASAHARA1 (1. Graduate School of Environmental Studies, Nagoya University, 2. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST))
【ハイライト講演】 紀伊半島東部の領家変成帯は，延性・脆性変形を被った火成岩と低P /T 型変成岩から構成されており，この変形履歴は，後期白亜紀ユーラシア大陸東縁の火山弧隆起の地殻変動過程を理解する鍵となる．この研究では年代測定を実施し，変形の産状区分と組み合わせることによりマイロナイト化の回数や時期について新たな制約を与えるものである． ※ハイライト講演とは．．．
[T13-P-13]Tectonostratigraphy and structural evolution of the Shimanto Accretionary Complex in the Kawaragou District, SW Japan
*Yusuke SHIMURA1 (1. Geological Survey of Japan, AIST)
[T13-P-14]Lithofacies and geological significance of limestone clasts from the Upper Cretaceous Takatsuo Formation (Wakino Subgroup) in the Kurogawa area, Moji Ward, Kitakyushu City, Japan
*Yusaku HOSHIKI1,2, Mie HOSHIKI1,2 (1. Geostack Co., Ltd., 2. Natural History Society of Kitakyushu Museum of Natural History and Human History)
[T13-P-15]Studies on sedimentary environments and tuff in the Ohyamashimo Formation in the Lower Cretaceous Sasayama Group, Southwest Japan
*Mitsuhiko Tsuji1, Yoshihiro Sawada2, Tomonori Tanaka3,4, Mototaka Saneyoshi5 (1. Graduate School of Science and Engineering, Okayama University of Science, 2. Institute of Paleontology and Geochronology, Okayama University of Science, Okayama, Japan,, 3. Institute of Natural & Environmental Sciences, University of Hyogo, Sanda, Japan,, 4. Museum of Nature and Human Activities, Hyogo, 5. Faculty of Biosphere-Geosphere Science, Okayama University of Science, Okayama, Japan)
[T13-P-16]Examination of the stratigraphic relationship between the 'Sarashi-kubi Bed' and the Muro and Kumano Groups, and the origin of the 'Sarashi-kubi Bed'
*Hitomi KAWANAMI1, Shigehiro FUJINO1, Shunsuke HARADA1 (1. University of Tsukuba)
【ハイライト講演】 サラシ首層は紀伊半島南部に分布する奇妙な地層である．径数メートルの巨礫を含む特異な含角礫泥岩層で帰属や成因についてこれまで多様な意見が提出され議論されてきた．この研究では現地の緻密な産状観察と堆積相解析によりこの問題を解決しようとするものである． ※ハイライト講演とは．．．
[T13-P-17]Radiolarian fossils and geological ages from red-colored mudstones and goethite concretions in the Kumage Group distributed in the central parts of Tanegashima Island, Kagoshima, SW Japan
*Akihide KIKUKAWA1,2, Noboru FURUKAWA3, Yoshiaki AITA4 (1. Natural History Museum and Institute, Chiba, 2. Nagoya University, 3. Chiba University, 4. Utsunomiya University)
[T13-P-18]Distribution and stratigraphy of the forearc basin fills on the Otaki district (1:50,000 quadrangle series), Boso Penincula, central Japan
*Masayuki UTSUNOMIYA1, Taku Komatsubara1, Terumasa Nakajima2, Shuichi Tokuhashi2 (1. Geological Survey of Japan, AIST, 2. Former Researcher of Geological Survey of Japan, AIST)
[T13-P-19]Correlation of the Miocene to Quaternary caldera ejecta in the southern part of NE-Japan and the tephras of marine core based on chemical compositions of apatite.
*Kotomi TOGASHI1, Reishi TAKASHIMA2, Yuji ORIHASHI3, Yoshihiro ASAHARA4, Kouki NAGAHASHI5, Takumi KITAMI6, Azumi KUROYANAGI2 (1. Department of Earth Science, Tohoku University, 2. The Center for Academic Resources and Archives Tohoku University Museum, 3. Graduate School of Science and Technology, Hirosaki University, 4. Department of Earth and Environmental Sciences, Graduate School of Environmental Studies, Nagoya University, 5. ITOCHU ENEX Co., Ltd., 6. Nippon Koei Co., Ltd.)
【ハイライト講演】 奥羽脊梁地域には新生代後期の大規模陥没カルデラが多数分布しているが，それぞれのテフラ物質の識別・対比は不十分である．この研究ではアパタイトの微量分析とジルコン年代測定にもとづいて陸上のカルデラ噴出物と三陸沖の海洋コアとの対比を試みるものである．このような基礎データを蓄積することで広域テフラの指標を中新世まで押し広げることができる． ※ハイライト講演とは．．．
[T13-P-20]Discovery of a Middle Miocene widespread tephra from the Kumano caldera in the Shimokita Peninsula.
*Daiki TSUJIMOTO1, Reishi TAKASHIMA2, Hiroyuki HOSHI3, Hironao SHINJOE4, Azumi KUROYANAGI2 (1. Department of EARTH SCIENCE, Tohoku University, 2. The Center for Academic Resources and Archives Tohoku University Museum, 3. Aichi University of Education, 4. Tokyo Keizai University)
[T13-P-21]Geological and petrological characteristics of the Early Miocene felsic volcanic rocks in the Motegi district, Tochigi, Japan.
*Hinako KOSAKA1, Jun HOSOI1 (1. Graduate School of Science and Engineering, Ibaraki University)
[T13-P-22]Age and lithology of volcanic rocks on Kwanmuri Island, Wakada Bay, Kyôto Prefecture, SW Japan
*Taqumi Tuzino1 (1. Geological Survey of Japan/AIST)
[T13-P-23]Microfossils and paleoenvironment of the Miocene Tari Formation, Tottori Prefecture
*Takeru NAKAI1, Toshiaki IRIZUKI1, Akira TSUJIMOTO1, Hiroki HAYASHI1, Yuichiro TANAKA2, Koji SETO1 (1. Shimane University, 2. National Institute of Advanced Industrial Science and Technology)
[T13-P-24]Geology and microfossils of the Miocene Bihoku Group in Tessei Town, Niimi City, Okayama Prefecture, Japan
*Keita KAWATA1, Toshiaki IRIDUKI1, Hiroki HAYASHI1, Akira TSUJIMOTO1, Yuichiro TANAKA2 (1. Shimane Univ., 2. National Institute of Advanced Industrial Science and Technology)
[T13-P-25]Slump folds and formation process in Tayu area, Kashima Town, Matsue City, Shimane Prefecture
*Hiroto HOTTA1, Tetuya SAKAI2 (1. Graduate School of Natural Science and Technology, Shimane University(Master course), 2. Shimane Univ.)
[T13-P-26]The features of uncofomities, sedimentary structures, and the paleoenvironment of sandstone of the Miocene Kawai Formation in Tamayu Town, Matsue City
*Ryuki UEOKA1, Tetsuya SAKAI2 (1. Shimane University Graduate School of Science and Technology, 2. Shimane University)
【ハイライト講演】 本研究でとりあげる川合層は中部中新統で日本海拡大に伴う海進期の地層とされる．この研究では野外調査と堆積相の記載を行い，海進期の地層がどのような環境変化・堆積過程をたどったかを明らかにするとともに，基盤との高角の不整合・層理と平行な不整合がそれぞれ海食崖・波食棚であることなどを示すものである ※ハイライト講演とは．．．
[T13-P-27]The divercity of features in sandstone of the Miocene Kawai and Kuri Formations around Isotake Town, Oda City, Shimane Prefecture
*Shogo HIBINO1, Tetsuya SAKAI2 (1. Shimane Univ. Graduate School of Natural Science and Technology Science of Engineering Systems Major Course of Earth Science, 2. Shimane Univ.)
【ハイライト講演】 本研究は島根県大田市の中新統の砕屑岩・火山砕屑岩の産状観察にもとづいて従来は曖昧であった砕屑岩，とくに砂岩を成因的に区別し，それらが陸側あるいは水底火山からの堆積物供給の中で複雑な形成過程を経たことを示そうとするものである． ※ハイライト講演とは．．．
[T13-P-28]Provenance study of the Neogene sandstones in the northern Fossa Magna region, Central Japan
*Shuta HASHIMOTO1, Hayato UEDA2, Koki YOSHIDA1 (1. Shinshu University, 2. Niigata University)
[T13-P-29]Structural Geological Investigation of the Area West of Mount Wakura, Eastern Matsue City, Shimane Prefecture, Japan
*Kenshiro IZUMI1, Hideki MUKOYOSHI1 (1. Shimane University)
[T13-P-30]Geology of the upper Quaternary distributed in Shirahama Town,Himeji City,Hyogo Prefecture,SW Japan
*Motoki MOURI1 (1. The Inspection for the Geological Committee in Okayama(IGCO) secretariat)
[T13-P-31]A preliminary study of the subsurface Pleistocene stratigraphy beneath the Holocene sediments of the Okayama Plain
*Tomonori Naya1, Susumu Tanabe1, Kiyohide Mizuno1, Misao Hongo2, Haruo Koami3, Shigeyuki Suzuki4 (1. AIST, GSJ, 2. Alps Technical Research Laboratory Co., Ltd., 3. Okayama Prefectural Okayama Asahi Senior High School, 4. Okayama University)
[T13-P-32]New viewer for the Seamless Geological Map of Japan 1:200,000 V2 released for testing
*Yoshiharu NISHIOKA1 (1. AIST)