华南和南海北部陆缘岩石圈速度结构特征与沉积盆地成因

方念乔; 姚伯初; 万玲; 张振国; 李慧勇

Volume 32 Issue 2

Mar. 2007

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Article Navigation > Earth Science > 2007 > 32(2): 147-154

FANG Nian-qiao, YAO Bo-chu, WAN Ling, ZHANG Zhen-guo, LI Hui-yong, 2007. The Velocity Structure of the Lithosphere and the Origin of Sedimentary Basins in the South China and Northern Margin of the South China Sea. Earth Science, 32(2): 147-154.

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The Velocity Structure of the Lithosphere and the Origin of Sedimentary Basins in the South China and Northern Margin of the South China Sea

1.
Faculty of Marine Science, China University of Geosciences, Beijing 100083, China
2.
Bureau of Guangzhou Marine Geological Survey, Guangzhou 510075, China

Received Date: 2007-02-08
Publish Date: 2007-03-25

Abstract

Abstract

According to the new CT data, in the paper we show some great abnormal low velocity zones occurring in the lithosphere and upper asthenosphere in the South China and northern margin of the South China Sea (SCS), which played a key role in the Cenozoic evolutionary history. Among them, the zones running NW-SE and existing at the interior and bottom of the lithosphere may result not only in forming a cluster of extensional structures and Cenozoic sedimentary basins in the continental margin of the South China but also in earlier spreading the floor of the SCS, while the deeper NNW zone at the upper asthenosphere mirrors the creep of the lithosphere to SSE that caused directly sea-floor spreading of the central basin of the SCS and the persistent split of the marginal region. The characteristics of the velocity structure are the traces left over by historical deep process in the study area. It is likely that the development of the Cenozoic basins in the South China and northern margin of the SCS results from the structure and movement pattern of lithosphere and asthenosphere.
- continental margin,
- lithosphere,
- velocity structure,
- abnormal low velocity zone,
- the South China Sea

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The Velocity Structure of the Lithosphere and the Origin of Sedimentary Basins in the South China and Northern Margin of the South China Sea

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