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Mesozoic subduction-accretion zone in northeastern South China Inferred from geophysical interpretations
Di, Z; Wang, WY; Wang, JL; Pang, X; Cai, DS; Sun, Z; zhoudiscs@scsio.ac.cn
2006
发表期刊SCIENCE IN CHINA SERIES D-EARTH SCIENCES
ISSN1006-9313
卷号49期号:5页码:471-482
摘要A segment of Mesozoic subduction-accretion zone was inferred across the northeastern South China Sea at approximately NE45 degrees orientation. Basic evidence includes the following: A belt of peek gross horizontal Bouguer gravity gradient (PGHGBA) is comparable in size and intensity to that of the Manila subduction-accretion zone. A belt of high positive magnetic anomalies appears to the north and sub-parallel to the PGHGBA, representing the volcanic arc associated to the subduction zone. The PGHGBA crosses obliquely both Cenozoic structures and present seafloor topography, indicating a pre-Cenozoic age. The segment is offset left-laterally by NW-running strike-slip faults, in concord with the Mesozoic stress field of South China. In addition, the existence of the subduction zone is supported by wide-angle seismic data obtained in different years by different institutions. At approximate localities, a north-dipping ramp of Moho surface is indicated by records of ocean-bottom seismometers, and a strong reflector about 8 km beneath the Moho reflector is indicated by both OBS and long-cable seismic records. The identification of a segment of Mesozoic subduction zone in NE South China Sea fills nicely the gap of the Great Late Mesozoic Circum SE Asia Subduction-acrretion Zone, which extended from Sumatra, Java, SE Kalimantan to N Palawan, and from Taiwan, Ryukyu to SW Japan.
部门归属Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Peoples R China; Changan Univ, Coll Geol & Topog Engn, Xian 710054, Peoples R China; Tongji Univ, Key Lab Marine Geol, Shanghai 200092, Peoples R China; China Natl Offshore Oil Co Ltd, Shenzhen Branch, Shenzhen 518067, Peoples R China; China Natl Offshore Oil Co Ltd, Res Ctr, Beijing 100027, Peoples R China
关键词Mesozoic Subduction Zone Se Asia Ne South China Sea Geophysics
学科领域Geosciences, Multidisciplinary
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000238585200003
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4414
专题中科院边缘海地质重点实验室
通讯作者zhoudiscs@scsio.ac.cn
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Di, Z,Wang, WY,Wang, JL,et al. Mesozoic subduction-accretion zone in northeastern South China Inferred from geophysical interpretations[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(5):471-482.
APA Di, Z.,Wang, WY.,Wang, JL.,Pang, X.,Cai, DS.,...&zhoudiscs@scsio.ac.cn.(2006).Mesozoic subduction-accretion zone in northeastern South China Inferred from geophysical interpretations.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(5),471-482.
MLA Di, Z,et al."Mesozoic subduction-accretion zone in northeastern South China Inferred from geophysical interpretations".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.5(2006):471-482.
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