[S-MP21] Oceanic and Continental Subduction Processes: petrologic and geochemical perspective

Wed. May 29, 2024 5:15 PM - 6:45 PM Poster Hall (Exhibition Hall 6, Makuhari Messe)

convener:HAFIZ U. REHMAN(Kagoshima University), Takeshi Imayama(Research Institute of Frontier and Science Technology, Okayama University of Science), Sayantani Chatterjee(Earthquake Research Institute, The University of Tokyo), DRIPTA DUTTA(Okayama University of Science)

Major orogenic belts on earth are formed by multi-dynamic processes such as subduction and collision. The resulted belts extend for hundreds of kilometers and the lithological or tectonic units preserve records of the evolutionary events. Investigation of such orogenic belts on a regional scale, rocks and minerals on a macro- and micro-scale, and understanding how, when and under what conditions the rocks and minerals formed allow earth scientists to elucidate geological events that occurred in the earth's interior and/or near the surface. Investigation of stress-strain regimes of rocks and minerals envisage deformation at plate-scale. Similarly, investigating crystallization/recrystallization of minerals from magma or due to metamorphic reactions, we can interpret the past events of the earth's history. Detailed geochemical analysis of bulk rocks and minerals enables us to estimate the water-rock interaction ratios and the role of fluid in the formation of minerals and rocks. Finally, geochronological investigations of specific minerals (such as zircon, garnet, rutile, apatite etc.) give information regarding the time-scale of crustal growth or metamorphic events.
The proposed international session in the JpGU 2024 aims at bringing earth scientists from Japan and overseas to present their research related to the processes of subduction, collision, and metamorphism of crustal rocks, formation of the oceanic/continental arcs, and accretion/ tectonic erosion of material along subduction boundaries.
Topics such as processes in subduction zones, accretion of volcaniclastic or terrigenous sediments along the subduction/collision boundaries, deformation and metamorphism of subducted crust, recycling of material, and geochemical and geophysical methodologies to unravel the geodynamic history preserved in various orogenic belts will be focus of the session. Exchange of ideas among geoscientists related to the theme of the session is most welcome.

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5:15 PM - 6:45 PM

[SMP21-P01] Zircon U-Pb, Hf, and O isotope data reveal a close relationship between the Garhwal Higher Himalayan Crystalline Sequence and the South China Craton during the Neoproterozoic

*Takeshi Imayama¹, Narayan Bose², Keewook Yi³, Yeon-Joong Jeong³, Kenji Horie⁴, Mami Takehara⁴, Ryoichi Kawabata¹ (1.Okayama University of Science, 2.Indian Institute of Technology Kharagpur, 3.Korea Basic Science Institute, 4.National Institute of Polar Research)

5:15 PM - 6:45 PM

[SMP21-P02] Metamorphic evolution of a high-pressure gneiss from the eastern Ngoc Linh Complex of the Kon Tum Massif, Vietnam: Implications for the Indochina-South China collision

*Tadashi Usuki¹, Duc Nam Nguyen¹, Jian-Wei Lin², Yoshiyuki Iizuka², Hao-Yang Lee², Kwan-Nang Pang², Ching-Hua Lo¹ (1.Department of Geosciences, National Taiwan University, 2.Institute of Earth Sciences, Academia Sinica)

5:15 PM - 6:45 PM

[SMP21-P03] Genesis of the enriched volcanic rocks at Sapporo-dake and Soranuma-dake in southwestern Hokkaido: Insights into the formation of the Toyoha polymetallic deposit

*Mizuki Ishida^1,2, Yuki Hieda², Shuhei Araki², Koichiro Fujinaga^3,2, Toru Shimizu⁴, Masaharu Tanimizu¹, Hitomi Nakamura⁴, Hikaru Iwamori⁵, Shiki Machida^3,2, Shigekazu Yoneda⁶, Kentaro Nakamura^2,3, Kato Yasuhiro^2,3 (1.School of Biological and Environmental Sciences, Kwansei Gakuin University, 2.Graduate School of Engineering, The University of Tokyo, 3.Ocean Resources Research Center for Next Generation, Chiba Institute of Techonology, 4.National Institute of Advanced Industrial Science and Technology, 5.Earthquake Research Institute, The University of Tokyo , 6.National Museum of Nature and Science)

5:15 PM - 6:45 PM

[SMP21-P04] Early Neoproterozoic granitoids in the Ereendavaa block, NE Mongolia: A correspondence with Precambrian blocks in the Central Asian Orogenic Belt

*Munkhdelger BOLD¹, Yasuhito OSANAI², Nobuhiko NAKANO², Tatsuro ADACHI², Tatsuki TSUJIMORI^1,3, Otgonbayar DANDAR^4,5, Manzshir BAYARBOLD^4,5, Dolzodmaa BOLDBAATAR⁶ (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University, 3.Center for Northeast Asian Studies, Tohoku University, 4.Graduate School of Environmental Studies, Tohoku University, 5.Geoscience Center, Mongolian University of Science and Technology, 6.Department of Mineral Processing and Engineering, School of Geology and Mining, Mongolian University of Science and Technology)

5:15 PM - 6:45 PM

[SMP21-P05] Structural evolution in southern extension of the Klaeng fault zone, eastern Thailand

*Kittichai Chansom¹, Pitsanupong Kanjanapayont¹ (1.Basin Analysis and Structural Evolution Research Unit, Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand)

Session information

[S-MP21] Oceanic and Continental Subduction Processes: petrologic and geochemical perspective

[SMP21-P01] Zircon U-Pb, Hf, and O isotope data reveal a close relationship between the Garhwal Higher Himalayan Crystalline Sequence and the South China Craton during the Neoproterozoic

[SMP21-P02] Metamorphic evolution of a high-pressure gneiss from the eastern Ngoc Linh Complex of the Kon Tum Massif, Vietnam: Implications for the Indochina-South China collision

[SMP21-P03] Genesis of the enriched volcanic rocks at Sapporo-dake and Soranuma-dake in southwestern Hokkaido: Insights into the formation of the Toyoha polymetallic deposit

[SMP21-P04] Early Neoproterozoic granitoids in the Ereendavaa block, NE Mongolia: A correspondence with Precambrian blocks in the Central Asian Orogenic Belt

[SMP21-P05] Structural evolution in southern extension of the Klaeng fault zone, eastern Thailand

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