DYNAMIC SIMULATION FOR SPREADING MECHANISM OF SOUTH CHINA SEA

LI Yanzhen; XU Hehua

doi:10.16562/j.cnki.0256-1492.2016.02.009

2016 Vol. 36, No. 2

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LI Yanzhen, XU Hehua. DYNAMIC SIMULATION FOR SPREADING MECHANISM OF SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2016, 36(2): 75-83. doi: 10.16562/j.cnki.0256-1492.2016.02.009

Citation:

LI Yanzhen, XU Hehua. DYNAMIC SIMULATION FOR SPREADING MECHANISM OF SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2016, 36(2): 75-83. doi: 10.16562/j.cnki.0256-1492.2016.02.009

DYNAMIC SIMULATION FOR SPREADING MECHANISM OF SOUTH CHINA SEA

LI Yanzhen^1,2,
XU Hehua¹

1. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049

Received Date: 16 May 2015

Revised Date: 28 August 2015

Abstract

Abstract

The South China Sea is located at the juncture of the Eurasian, Indian-Australian and Pacific plates and complicated in tectonic location and evolution. It has experienced a process from rifting of a passive continent to seafloor spreading, under the affection of both tectonic extrusion and asthenosphere upwelling. Based on the tectonic and dynamic background of South China Sea, a 2D finite element dynamic model with a pre-existing weak zone was prepared to explore the behaviors of the two dynamic forces. The simulation results indicate:(1) The lithosphere where faults or weak zones occur is easier to have stress concentration and crust thinning;(2) The asthenosphere upwelling seems play a more important role in the opening as the tectonic extrusion can hardly cause lithosphere's damage,;(3) The rheological properties may have greater contribution to the opening of South China Sea comparing to the existence of weak zone. The rheological properties of the lower crust may cause a greater crust thinning comparing to the upper crust.
- extension /
- thinning /
- expand /
- simulation /
- South China Sea

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References

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