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Geophysical implications for the formation of the Tamu Massif-the Earth's largest single volcano-within the Shatsky Rise in the northwest Pacific Ocean
Zhang, JC; Chen, J; jchen@scsb.gov.cn
2017
发表期刊SCIENCE BULLETIN
卷号62期号:1页码:69-80
摘要Recent geophysical research programs survey the Tamu Massif within the Shatsky Rise oceanic plateau in the northwest Pacific Ocean to understand the formation of this immense volcano and to test the formation hypotheses of large igneous province volcanism. Massive sheet basalt flows are cored from the Tamu Massif, implying voluminous eruptions with high effusion rates. Seismic reflection data show that the Tamu Massif is the largest single volcano on Earth, characterized by a central volcanic shield with low-gradient flank slopes, implying lava flows emanating from its center and spreading massive area on the seafloor. Velocity model calculated from seismic refraction data shows that crustal thickness has a negative correlation with average velocity, implying a chemically anomalous origin of the Tamu Massif. Seismic refraction and reflection data reveal a complete crustal structure across the entire volcano, featured by a deep crust root with a maximum thickness of similar to 30 km, and Moho geometry is consistent with the Airy Isostasy. These recent findings provide evidence for the two end-member formation models: the mantle plume and the plate boundary. Both are supported by some results, but both are not fit with some either. Consequently, plume-ridge interaction could be a resolution that awaits future investigations. (C) 2016 Production Science China Press. Published by Elsevier B.V. and Science China Press.
部门归属[Zhang, Jinchang] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Zhang, Jinchang] Minist Land & Resources, Key Lab Marine Mineral Resources, Guangzhou 510075, Guangdong, Peoples R China; [Chen, Jie] State Ocean Adm, South China Sea Inst Planning & Environm Res, Guangzhou 510310, Guangdong, Peoples R China; [Chen, Jie] State Ocean Adm, Key Lab Ecol Environm Coastal Areas, Dalian 116023, Peoples R China; [Chen, Jie] State Ocean Adm, Key Lab Integrated Marine Monitoring & Appl Techn, Shanghai 200137, Peoples R China
关键词Oceanic Plateau Large Igneous Province Plume-ridge Interaction Marine Geophysics Plate Tectonics
资助项目MSG
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16474
专题中科院边缘海地质重点实验室
通讯作者jchen@scsb.gov.cn
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Zhang, JC,Chen, J,jchen@scsb.gov.cn. Geophysical implications for the formation of the Tamu Massif-the Earth's largest single volcano-within the Shatsky Rise in the northwest Pacific Ocean[J]. SCIENCE BULLETIN,2017,62(1):69-80.
APA Zhang, JC,Chen, J,&jchen@scsb.gov.cn.(2017).Geophysical implications for the formation of the Tamu Massif-the Earth's largest single volcano-within the Shatsky Rise in the northwest Pacific Ocean.SCIENCE BULLETIN,62(1),69-80.
MLA Zhang, JC,et al."Geophysical implications for the formation of the Tamu Massif-the Earth's largest single volcano-within the Shatsky Rise in the northwest Pacific Ocean".SCIENCE BULLETIN 62.1(2017):69-80.
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