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논문 기본 정보

자료유형
학술대회자료
저자정보
Chang Whan Oh (Jeonbuk National University) Seung Hwan Lee (Korea Institute of Geoscience and Mineral Resources) Youn Soo Lee (Pohang University of Science and Technology) Seung-Gu Lee (Korea Institute of Geoscience and Mineral Resources) Jia-Qi Liu (Chinese Academy of Science)
저널정보
대한지질학회 대한지질학회 학술대회 2021 추계지질과학연합학술대회
발행연도
2021.10
수록면
107 - 107 (1page)

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Baekdu volcano is a Cenozoic composite volcano in northeastern Asia that consists of a basaltic plateau, a basaltic shield, and a trachytic to comenditic stratovolcano. In this study, the petrogenesis and tectonic setting of Baekdu volcano are studied based on the whole-rock geochemistry and Sr-Nd-Pb isotope compositions of the Baekdu volcanic rocks. The K–Ar age and mineral chemistry are also investigated to estimate the evolution of the magma chamber depth beneath Baekdu volcano. The Toudao and Baishan basalts formed ca. 2.5 Ma and 1.1 Ma and erupted from magma chambers located at depths of 11.5 ± 2.2 km and 24.9 ± 3.8 km, respectively. The Xiaobaishan and Middle trachytes and the comendites formed during the Pleistocene from magma chambers located at depths of 2.9±0.2 km, 5.4±0.45 km, and 4.4±0.3 km, respectively. These data suggest that the trachytes and comendites erupted from magma chambers located at depths of approximately 3–5 km. The Baishan basalts have geochemical characteristics comparable with those of ocean island basalt (OIB), whereas the Toudao basalts show enriched mid-ocean ridge basalt (E-MORB) or OIB characteristics. The trends of several components, such as the CaO/Al₂O₃ ratio and the TiO₂ and Sc concentrations, are different betw ... 전체 초록 보기

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