Wide-angle and multi-channel seismic surveys in Zhongsha waters
文献类型：期刊论文
| 作者 | Li YuHan3,4; Huang HaiBo3; Qiu NueLin3,4; Du Feng5; Long GenYuan6; Zhang HaoYu3,4; Chen Han1; Wang Qiang3,4 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020 |
| 卷号 | 63期号:4页码:1523 |
| 关键词 | South China Sea Zhongsha Waters Wide-angle seismic survey Multi-channel seismic survey Ocean Bottom Seismometer Atoll Sedimentary strata |
| DOI | 10.6038/cjg2020N0259 |
| 英文摘要 | Due to the wide-spread shoals and reefs, Zhongsha waters (atoll) has long been a blank area for seismic exploration in the South China Sea. To reveal the crustal structures and the stratigraphic-tectonic characteristics of this area, and to comprehensively depict the Cenozoic extension process of the continental margins in the South China Sea, we carried out one wide-angle seismic profile OBS2017-2 and four multi-channel seismic profiles in the Zhongsha Atoll and its adjacent areas for the first time. The Ocean Bottom Seismometer (OBS) data was processed by format conversion, position relocation, etc. The seismic phases from deep crust were identified and used to simulate the crustal structures by forward modeling approach. Six sets of sedimentary strata were established based on the stratigraphic and tectonic interpretation of the multi-channel seismic profiles. The data processing of the OBS2017-2 shows that the data quality is very high, the deep seismic phases are clear and extend longer on the atoll, reaching over 100 km. The Zhongsha Atoll is characterized by slightly-thinned continental crust, with thickness of about 25 km. Sedimentary layers in the atoll are relatively thin as shown in the multi-channel seismic data. Basically, there is few tectonic-magmatic activities exist within the atoll except for a basement-cutting fault that named Paihong-Meixi Fault in the southwest of the atoll. Extensive magmatic intrusions and volcanoes exist only around the slope toe of the Zhongsha Atoll. The thinned upper crust and the sedimentary characteristics in the Zhongsha Atoll indicate that this area may have experienced strong processes of exposure and denudation. The recent wide-angle and multi-channel seismic surveys in the Zhongsha waters have filled in the blank of geological/ geophysical research in the South China Sea, providing important data for understanding the tectonic-sedimentary evolution in this area. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18561]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Marine Geol Survey Inst Hainan Prov, Haikou 570206, Hainan, Peoples R China 2.Chinese Univ Hong Kong, Faulty Earth & Atmosphere Sci, Hong Kong, Peoples R China 3.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 4.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510301, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Hubei Earthquake Agcy, Hubei Key Lab Earthquake Early Warning, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li YuHan,Huang HaiBo,Qiu NueLin,et al. Wide-angle and multi-channel seismic surveys in Zhongsha waters[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(4):1523, 1537. |
| APA | Li YuHan.,Huang HaiBo.,Qiu NueLin.,Du Feng.,Long GenYuan.,...&Wang Qiang.(2020).Wide-angle and multi-channel seismic surveys in Zhongsha waters.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(4),1523. |
| MLA | Li YuHan,et al."Wide-angle and multi-channel seismic surveys in Zhongsha waters".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.4(2020):1523. |
入库方式： OAI收割
来源：南海海洋研究所
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