中国东部中新生代断陷盆地幕式裂陷过程的动力学响应和模拟模型

林畅松; 张燕梅; 李思田; 任建业; 张英志

Volume 29 Issue 5

Sep. 2004

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Article Navigation > Earth Science > 2004 > 29(5): 583-588

LIN Chang-song, ZHANG Yan-mei, LI Si-tian, REN Jian-ye, ZHANG Ying-zhi, 2004. Episodic Rifting Dynamic Process and Quantitative Model of Mesozoic-Cenozoic Faulted Basins in Eastern China. Earth Science, 29(5): 583-588.

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Episodic Rifting Dynamic Process and Quantitative Model of Mesozoic-Cenozoic Faulted Basins in Eastern China

1.
Geoscience Laboratories Center, China University of Geosciences, Beijing 100083, China
2.
Department of Computer Sciences, China University of Geosciences, Beijing 100083, China
3.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2004-05-12
Publish Date: 2004-09-25

Abstract

Abstract

Integrated analysis of basin filling and tectonic evolution, aimed with computer modeling technique, reveals the dynamic process of basin subsidence, sedimentary infill, structure and thermal evolution in response to the multiple rifting processes of the Mesozoic-Cenozoic rift basins in eastern China. The synrift phases of these basins, such as the Bohaiwan and Jianghan basins, usually include 3 to 4 rifting episodes, and the trends of syndepositional faults, the type of volcanic rocks and the distribution of depocenters and depositional systems changed significantly in different rifting stages. The episodic change in tectonic subsidence rate controls the development and evolution of the regional(the second order)sequences. In intensively rifting subsidence episodes, deep lacustrine basin sequences are usually observed, while during the initial and final rifting episodes shallow lacustrine and fluvial basin sequences commonly form. The process of episodic rifting significantly differs from that of the simple rifting in tectonic subsidence and deep heat flow, and can not be accurately described by a simple(one episode)stretching model. Through correction of the initial stretching condition of each rifting episode and stretching index, we have programmed a multiple uniform instantaneous stretching model to simulate the formation of the basins. This model has been applied to reconstruct the lithosphere structure and to evaluate the deep thermal evolution of the Yinggehai basin. The calculated results are in agreement with geophysical data and geological observation in the basin.
- episodic rifting,
- dynamic process,
- quantitative model,
- eastern China

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References(16)

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