The Latest Spreading Periods of the South China Sea: New Constraints From Macrostructure Analysis of IODP Expedition 349 Cores and Geophysical Data
文献类型：期刊论文
| 作者 | Sun, Zhen; Ding, Weiwei; Zhao, Xixi; Qiu, Ning; Liu, Jian; Li, Chun-Fcng |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2019 |
| 卷号 | 124期号:10页码:9980 |
| 关键词 | macrostructure analysis marine gravity anomaly marine magnetic anomaly latest spreading history IODP Expedition 349 South China Sea |
| DOI | 10.1029/2019JB017584 |
| 英文摘要 | Macrostructures preserved in deformed rocks are essential for the understanding of their evolution, especially when the deformation is weak and hard to discriminate in regional scale or purely through geophysical data. In order to resolve the inconsistency between NS trending fracture zones and NE oriented spreading fabrics of the South China Sea during the latest spreading stage, we analyzed macrostructures identifiable from the basalt and consolidated sediment samples of the Integrated Ocean Drilling Program (IODP) Sites U1431 and U1433. These two sites are close to the East and Southwest relict spreading ridges and provide critical information on the latest spreading stages. The structures in the basalt of both sites suggest two dominant orientations of NS and NE. At U1431, sediments show mainly WNW trending slickensides, different from that of basalt. At U1433, no structures were found in postspreading sediment. Thus, NE and NS trending structures in basalt are most possibly formed by seafloor spreading. Crosscutting relationship suggests that NE trending structures formed first, followed by NS and finally WNW trending structures. These observations are consistent with geophysical features. Magnetic anomalies and ocean bottom seismometer velocity suggest that the latest relict ridge of the East Subbasin coincides with the EW trending seamount chain. Located between the relict ridges of East and Southwest Subbasins, NS trending Zhongnan-Liyue Fracture Zone had acted as the latest transform fault. Based on the above evidences, we proposed that the South China Sea may have experienced a short period of NS oriented spreading after earlier SE spreading. These results resolve the previous inconsistencies. |
| 资助机构 | Guangdong NSF research team project [2017A030312002]; K. C. Wong Education Foundation [GJTD-2018-13]; IODP-China Foundation; NSFCNational Natural Science Foundation of China (NSFC) [91628301, 41376027, 41576070, 41576068, 41430962, 41674069, 91528302, 20153410]; U.S. National Science FoundationNational Science Foundation (NSF) [EAR-1250444]; Guangdong Province Foundation [41576068]; Joint Foundation of the Natural Science Foundation of China (NSFC) and Guangdong Province [U1301233] ; Guangdong NSF research team project [2017A030312002]; K. C. Wong Education Foundation [GJTD-2018-13]; IODP-China Foundation; NSFCNational Natural Science Foundation of China (NSFC) [91628301, 41376027, 41576070, 41576068, 41430962, 41674069, 91528302, 20153410]; U.S. National Science FoundationNational Science Foundation (NSF) [EAR-1250444]; Guangdong Province Foundation [41576068]; Joint Foundation of the Natural Science Foundation of China (NSFC) and Guangdong Province [U1301233] |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18261]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Sun, Zhen,Ding, Weiwei,Zhao, Xixi,et al. The Latest Spreading Periods of the South China Sea: New Constraints From Macrostructure Analysis of IODP Expedition 349 Cores and Geophysical Data[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(10):9980, 9998. |
| APA | Sun, Zhen,Ding, Weiwei,Zhao, Xixi,Qiu, Ning,Liu, Jian,&Li, Chun-Fcng.(2019).The Latest Spreading Periods of the South China Sea: New Constraints From Macrostructure Analysis of IODP Expedition 349 Cores and Geophysical Data.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(10),9980. |
| MLA | Sun, Zhen,et al."The Latest Spreading Periods of the South China Sea: New Constraints From Macrostructure Analysis of IODP Expedition 349 Cores and Geophysical Data".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.10(2019):9980. |
入库方式： OAI收割
来源：南海海洋研究所
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