日本鉱物科学会年会講演要旨集
日本鉱物科学会 2007年度年会
セッションID: G4-09
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G4:深成岩及び変成岩
ベトナム北部Sam Nua Depression Zoneにおける堆積岩及び火成岩の地球化学
Trung NguyenSajeev Krishnan*板谷 徹丸
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The Sam Nua Depression Zone is a NW-SE trending tectonic unit exposed over 400 km from Northern Vietnam through Laos to Southwestern China. It represents the Northern periphery of Indochina block contiguous to South China block by Songma fault. It consists of Paleozoic, Mesozoic and Cenozoic sedimentary and igneous rocks with various chemical compositions. The Paleozoic passive continental margin sediments and the associated mafic-ultramafic rocks represent the remnants of Paleo-oceanic lithosphere that accreted into the northern edge of the Indochina block while the Triassic terrigenous, terrigeno-effusive and igneous rocks are related with continental arc setting. The Jurrasic and Cenozoic igneous rock occurrences preserve chemical characteristics of within plate tectonic setting.
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© 2007 日本鉱物科学会
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