Crustal thinning and extension in the northwestern continental margin of the South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Crustal thinning and extension in the northwestern continental margin of the South China Sea
	Zhu, Junjiang; Li, Jian; Sun, Zongxun; Li, Sanzhong
刊名	GEOLOGICAL JOURNAL
	2016
卷号	51 页码:286-303
关键词	crustal thinning rifting Pearl River Mouth Basin continental shelf South China Sea continental margin
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.
中文摘要	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.
学科主题	Geology
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15329]
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	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.(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.