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学科主题: Geosciences, Multidisciplinary
题名: Patterns and Dynamics of Rifting on Passive Continental Margin from Shelf to Slope of the Northern South China Sea: Evidence from 3D Analogue Modeling
作者: Sun, Z ; Zhou, D ; Wu, SM ; Zhong, ZH ; Myra, K ; Jiang, JQ ; Fan, H
通讯作者: smwu@scsio.ac.cn
关键词: passive continental margin ; rifting pattern ; 3D analogue modeling ; South China Sea
刊名: JOURNAL OF EARTH SCIENCE
发表日期: 2009
卷: 20, 期:1, 页:136-146
收录类别: sci
部门归属: [Sun Zhen; Zhou Di; Wu Shimin] Chinese Acad Sci, Key Lab Marginal Sea Geol, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Zhong Zhihong] Shenzhen Branch CNOOC, Dept Sci & Technol, Guangzhou 510420, Guangdong, Peoples R China; [Myra Keep] Univ Western Australia, Tecton Special Res Ctr, Nedlands, WA 6907, Australia; [Jiang Jianqun; Fan Hao] Liaohe Oilfield PetroChina, Hainan Oil & Gas Explorat Co, Panjin 124010, Peoples R China
项目归属: 海洋地质
摘要: Affected by thermal perturbation due to mantle uprising, the rheological structure of the lithosphere could be modified, which could lead to different rifting patterns from shelf to slope in a passive continental margin. From the observed deformation style on the northern South China Sea and analogue modeling experiments, we rind that the rift zone located on the shelf is characterized by half grabens or simple grabens controlled mainly by long faults with large vertical offset, supposed to be formed with normal lithosphere extension. On the slope, where the lithosphere is very hot due to mantle upwelling and heating, composite grabens composed of symmetric grabens developed. The boundary and inner faults are all short with small vertical offset. Between the zones with very hot and normal lithosphere, composite half grabens composed of half grabens or asymmetric grabens formed, whose boundary faults are long with large vertical offset, while the inner faults are relatively short. Along with the thickness decrease of the brittle upper crust due to high temperature, the deformation becomes more sensitive to the shape of a pre-existing weakness zone and shows orientation variation along strike. When there was a bend in the pre-existing weakness zone, and the basal plate was pulled by a clockwise rotating stress, the strongest deformation always occurs along the middle segment and at the transition area from the middle to the eastern segments, which contributes to a hotter lithosphere in the middle segment, where the Baiyun (sic) sag formed. KEY WORDS: passive continental margin, rifting pattern, 3D analogue modeling, South China Sea.
原文出处: 查看原文
WOS记录号: WOS:000264753800014
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4644
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Recommended Citation:
Sun, Z; Zhou, D; Wu, SM; Zhong, ZH; Myra, K; Jiang, JQ; Fan, H.Patterns and Dynamics of Rifting on Passive Continental Margin from Shelf to Slope of the Northern South China Sea: Evidence from 3D Analogue Modeling,JOURNAL OF EARTH SCIENCE,2009,20(1):136-146
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