Tectonic framework of miniature continental block-narrow oceanic basin revealed by the southern typical profile in the China seas-Western Pacific Ocean
文献类型：期刊论文
| 作者 | Li YuHan2,4; Huang HaiBo2; He EnYuan2; Cao LingMin2; Qiu XueLin2,4; Guo XingWei3; Liu HaiLing2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2020 |
| 卷号 | 63期号:5页码:1938 |
| 关键词 | China seas-western Pacific Ocean Typical profile South China Sea Miniature continental block Narrow oceanic basin Tectonic framework Joint inversion of gravity-magnetic-seismic |
| DOI | 10.6038/cjg2020N0380 |
| 英文摘要 | Due to the need of compiling the newest maps of geological and geophysical results, we integrated the latest geological and geophysical data, and used advanced methods to compile the southern typical profile across the China seas and the western Pacific Ocean area. The compilation is mainly based on wide-angle seismic survey data collected in the South China Sea in recent years, using joint inversion of gravity-magnetic-seismic data, supplemented by dredging, drilling, geothermal data and geological sections, and under the guidance of the theory of Block Tectonics. The southern typical profile trends in NNW-SSE, and starts from the Southern mainland China to the Sulawesi Sea, spanning multiple tectonic units, including three continental margin-discrete continental blocks, e.g., South China block-northern South China Sea margin (crustal thickness of similar to 26-32 km), Zhongsha Block (crustal thickness of similar to 14-25 km), Liyue-north Palawan Block (crustal thickness of similar to 19-23 km); four oceanic basins, e.g., Northwest Sub-basin (crustal thickness of similar to 6-8 km), Central Sub-basin (crustal thickness of similar to 5-6 km), Sulu Sea (crustal thickness of similar to 6-20 km), Sulawesi Sea (crustal thickness of similar to 7-8 km); and two subduction-arc zone, e.g., Cagayan Ridge (crustal thickness of similar to 8 km), and Sulu Ridge (crustal thickness of similar to 15 km).The results of the joint geophysical inversion reveal the crustal nature beneath the miniature continental blocks, the narrow oceanic basins, and the volcanic arcs distributed alternatively. They constitute the unique tectonic framework "Miniature Continental Block-Narrow Oceanic Basin" in the western Pacific margin. This tectonic framework is confined by strike-slip boundaries in the east and the west, and a subduction boundary in the south. Since the ancient-Tethys subducted into the Eurasia plate, this region has undergone a complex tectonic evolution process. The crust is in the dynamic cycle of the constant extinction and formation, and the tectonic stress also changed dynamically. Based on the comprehensive analysis of regional geodynamics, it is concluded that the formation of the Miniature Continental Block-Narrow Oceanic Basin tectonic framework is largely by reason of its unique location where three plates meet together and the effect from complex and abundant subduction in the region. Such a compilation of the typical profiles has advanced the study of tectonic and geophysical characteristics in the China seas-western Pacific Ocean area, providing a good research example for "Look into the South China Sea from outside". At the same time, it inspires us to strengthen the exploration of the adjacent research blank areas in the future. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18549]  |
| 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.Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510301, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li YuHan,Huang HaiBo,He EnYuan,et al. Tectonic framework of miniature continental block-narrow oceanic basin revealed by the southern typical profile in the China seas-Western Pacific Ocean[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(5):1938, 1958. |
| APA | Li YuHan.,Huang HaiBo.,He EnYuan.,Cao LingMin.,Qiu XueLin.,...&Liu HaiLing.(2020).Tectonic framework of miniature continental block-narrow oceanic basin revealed by the southern typical profile in the China seas-Western Pacific Ocean.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(5),1938. |
| MLA | Li YuHan,et al."Tectonic framework of miniature continental block-narrow oceanic basin revealed by the southern typical profile in the China seas-Western Pacific Ocean".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.5(2020):1938. |
入库方式： OAI收割
来源：南海海洋研究所
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