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Crustal thinning and extension in the northwestern continental margin of the South China Sea
Zhu, Junjiang; Li, Jian; Sun, Zongxun; Li, Sanzhong; Zhu, JJ (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China.
2016
发表期刊GEOLOGICAL JOURNAL
卷号51页码:286-303
摘要Multichannel seismic data on the continental shelf have been used to image the rift-related shallow structural units of the Pearl River Mouth Basin across the northwestern margin of the South China Sea. The Hainan Uplift, Zhu 3 Depression and Shenhu-Ansha Uplift zones are bounded by normal faults or listric-normal faults, which suggest lithospheric extension on the continental shelf. Graben structures10-15km wide are imaged on the Wanshan Uplift and Northern Fault Terrace from the reflection data. The thinned continental crust and anomaly rift-related crust in the depression zone and the transitional crust indicated by the wide-angle OBS velocity model dominate the crustal structure of the continental shelf in the continental margin of the South China Sea. The different total crustal stretching factors in different shallow structural units suggest that non-uniform horizontal stretching controls the crustal thinning. The total crustal stretching factor is ca. 1.4-1.6 at the coast area, ca. 1.67-1.8 in the rift-depression zone and ca. 1.7-1.75 in the transitional crustal domain. Pure-shear crustal thinning controls the crustal extension in the rift-depression zone. The high heat flow anomaly in the vicinity of the seismic lines and anomaly rift-depression velocity structure suggest that the crustal thinning on the continental shelf of the South China Sea can be produced by lateral mantle flow within the hotter regional lithospheric background. Copyright (c) 2015 John Wiley & Sons, Ltd.
部门归属[Zhu, Junjiang; Li, Jian; Sun, Zongxun] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China; [Li, Sanzhong] Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China ; 边缘海地质
关键词Crustal Thinning Rifting Pearl River Mouth Basin Continental Shelf South China Sea Continental Margin
学科领域Geology
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/15329
专题中科院边缘海地质重点实验室
通讯作者Zhu, JJ (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China.
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GB/T 7714
Zhu, Junjiang,Li, Jian,Sun, Zongxun,et al. Crustal thinning and extension in the northwestern continental margin of the South China Sea[J]. GEOLOGICAL JOURNAL,2016,51:286-303.
APA Zhu, Junjiang,Li, Jian,Sun, Zongxun,Li, Sanzhong,&Zhu, JJ .(2016).Crustal thinning and extension in the northwestern continental margin of the South China Sea.GEOLOGICAL JOURNAL,51,286-303.
MLA Zhu, Junjiang,et al."Crustal thinning and extension in the northwestern continental margin of the South China Sea".GEOLOGICAL JOURNAL 51(2016):286-303.
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