An Anomalous Seamount on the Southwestern Mid-Ridge of the South China Sea  

作　　者：WANG Yanlin WANG Jun YAN Pin QIU Yan 

机构地区：[1]CAS Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,CAS [2]Laboratory for Marine Geology,Qingdao National Laboratory for Marine Science and Technology [3]Guangzhou Marine Geological Survey

出　　处：《Acta Geologica Sinica(English Edition)》2017年第6期2340-2341,共2页地质学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (grants No.91328205, 41376062 and 41206039);the Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology (grant No.MGQNLMKF201708);726 Plan (grant No.GZH201100205)

摘　　要：Objective The development of continental rifting and seafloor spreading can be predominated by magmatic upwelling （magma-rich） or tectonic stretching （magma-poor）. Located in the terminal portion of propagating seafloor spreading of the South China Sea （SCS）, the southwestern mid-ridge of the southwest sub-basin （SWSB） of the SCS was found with much thin crust and numerous faulted blocks coupling with magma-poor continental margins along its flanks. Therefore, the southwestern part of the SWSB is most likely to be a tectonic-dominated basin. To justify the hypothesis with further evidence, we investigated the nature of seamounts on the southwestern mid-ridge of the SWSB which may inherit seafloor spreading.Objective The development of continental rifting and seafloor spreading can be predominated by magmatic upwelling （magma-rich） or tectonic stretching （magma-poor）. Located in the terminal portion of propagating seafloor spreading of the South China Sea （SCS）, the southwestern mid-ridge of the southwest sub-basin （SWSB） of the SCS was found with much thin crust and numerous faulted blocks coupling with magma-poor continental margins along its flanks. Therefore, the southwestern part of the SWSB is most likely to be a tectonic-dominated basin. To justify the hypothesis with further evidence, we investigated the nature of seamounts on the southwestern mid-ridge of the SWSB which may inherit seafloor spreading.

关 键 词：Southwestern Mid-Ridge the South China Sea 

分 类 号：P736[天文地球—海洋地质]