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学科主题: Geosciences, Multidisciplinary
题名: Dynamic Analysis on Rifting Stage of Pearl River Mouth Basin through Analogue Modeling
作者: Sun, Z ; Zhou, D ; Sun, LT ; Chen, CM ; Pang, X ; Jiang, JQ ; Fan, H
通讯作者: ltsun@scsio.ac.cn
关键词: Pearl River Mouth basin ; analogue modeling ; controlling factor of continental rift basin
刊名: JOURNAL OF EARTH SCIENCE
发表日期: 2010
卷: 21, 期:4, 页:439-454
收录类别: sci
部门归属: [Sun Zhen; Zhou Di; Sun Longtao] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Chen Changmin; Pang Xiong] CNOOC, Shenzhen Branch, Dept Technol, Guangzhou 510420, Guangdong, Peoples R China; [Jiang Jianqun; Fan Hao] Hainan Oil & Gas Explorat Co, Liaohe Oilfield PetroChina, Panjin 124010, Peoples R China
项目归属: 海洋地质
摘要: The Pearl River Mouth basin (PRMB) is a marginal sedimentary basin of the South China Sea. It trends NE and is divided into three segments from west to east by two NW-trending faults. Changing dramatically in structures along and across strike, the PRMB is a good example to analyze main factors that might control the process of a continental rift basin's extension. Through five series of analogue experiments, we investigate the role of different factors, such as pre-existing discontinuities of crust, rheological profiles of lithosphere, kinematics of extension and presence of magmatic bodies and strong crustal portions (rigid massifs) on the development of basin's structures. After being compared with the architecture of the natural prototype, the results of the analogue models were compared with the architecture of the natural prototype and used to infer the role of the different factors controlling the formation and evolution of the PRMB. The main conclusions are as follows. (1) Affected by pre-Cenozoic structures, the PRMB was controlled by crosscut NE- and NW-trending initial faults, and the NW-trending Yitong'ansha ((sic)) fault may be a through-going fault along dip and offset the NE-trending rift and faults, while the Enpingdong ((sic)) fault might exist only in the middle and south. (2) The NW-trending faults may orient WNW to be sinistrally transtensional under SE to nearly NS extension. (3) The thickness ratio of brittle over ductile crust in Baiyun ((sic)) sag is less than normal, suggesting an initially hot and weak lithosphere. (4) The magma must have taken part in the rifting process from early stage, it may occur initially upon or slightly south of the divergent boundary in the middle segment. The flow of magma toward rift boundary faults caused extra vertical subsidence above the initial magma reservoir without creating a large extensional fault. (5) The rigid massif contributed to the strain partition along and across basin strike.
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WOS记录号: WOS:000280523200007
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4318
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; Sun, LT; Chen, CM; Pang, X; Jiang, JQ; Fan, H.Dynamic Analysis on Rifting Stage of Pearl River Mouth Basin through Analogue Modeling,JOURNAL OF EARTH SCIENCE,2010,21(4):439-454
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