Solid Earth Sciences (S)
Session Sub-category Mineralogy & Petrology(MP)
Session ID S-MP25
Title Oceanic and Continental Subduction Processes
Short Title Oceanic & Cont. Subduc. Proc.
Main Convener Name HAFIZ REHMAN
Affiliation Kagoshima University
Co-Convener 1 Name Takeshi Imayama
Affiliation Research Institute of Frontier and Science Technology, Okayama University of Science
Co-Convener 2 Name Kaushik Das
Affiliation Hiroshima University
Session Language
E
Scope
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 rock and minerals enables us to understand water-rock/fluid interaction in the formation of new minerals, growth, and recrystallization. Moreover, 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-2025, a continuation from the last (> ten years) sessions, aims to bring together earth scientists from Japan and overseas to present their research related to the processes of subduction, collision, and metamorphism of crustal rocks, formation of oceanic/continental arcs, and accretion/tectonic erosion of material along subduction boundaries and related topics. In addition, newly obtained data from geochemical and geophysical methodologies, modeling and interpretation will be focus of the session.
Presentation Format Oral and Poster presentation
Invited Authors Jian-wei Lin (Institute of Earth Sciences, Academia Sinica, Taiwan)
Time Presentation No Title Presenter
Oral Presentation May 26 PM2
15:30 - 15:45 SMP25-01 Supra-subduction zone magmatism and extreme mantle depletion in the Early Cretaceous Nidar Ophiolite Complex, NW India Takeshi Imayama
15:45 - 16:00 SMP25-02 Prograde P-T evolution of eclogites from the Song Ma suture zone, northern Vietnam Tadashi Usuki
16:00 - 16:15 SMP25-03 Characterization of diverse thermal trends in Western Himalayan Metamorphic rocks deduced from the Raman spectroscopy of carbonaceous material Nasir Ahmad
16:15 - 16:30 SMP25-04 Role of phyllosilicates on slip direction reversals in Himalayan Frontal Fold Thrust Belt Dyuti Prakash Sarkar
16:30 - 16:45 SMP25-05 The geological evolution of the north-eastern Arunachal Himalaya, India: a testament to erstwhile subduction and ongoing collision between Indian and Eurasian plates TOKU OMEN ATTE
16:45 - 17:00 SMP25-06 Amphibole-albite rock in a metasomatic zone: a record of subduction metamorphism at the slab-mantle interface and its tectonic implications Dominikus Deka Dewangga
Presentation No Title Presenter
Poster Presentation May 26 PM3
SMP25-P01 How fast is too fast? Izanagi's roll back on the run Daniel Pastor-Galan
SMP25-P02 Petrographic and geochemical study of apatite in carbonatites of the Peshawar Plain Alkaline Igneous Province, NW Himalayas, Pakistan Mehboob ur Rashid
SMP25-P03 Cenozoic terrane accretion from East China Sea to South China Sea margins: a perspective of detrital zircon U-Pb geochronology Jian-wei Lin
SMP25-P04 Geochemistry and geochronology of Cretaceous volcanic rocks from the Dalat Zone, Southeastern Vietnam: implications for the subduction process and crustal evolution Kenta Kawaguchi
SMP25-P05 Young boninitic lavas from the northern Tonga fore-arc unrelated to subduction initiation Bora Myeong