南海西部中建南盆地构造格架及形成机制分析

doi:10.11743/ogg20060411

Abstract

Abstract:

Zhongjiannan basin,located in the west of South China Sea,has well developed faults and volcanic rocks,thus the geological conditions are very complex.The influence of the Cenozoic tectonic movement upon the formation and evolution of the basin was huge and is well reflected by its four superposed structural layers with different characteristics in profile,its NNE-NW trending,and its lozenge shape on plane.Both geometrical characteristics of strike-slip basin and geological characteristics of tensional basin can be found in the basin.Centered with a major depression and two secondary depressions,the basin has a structural framework with alternative depressions and upheavals.Extensional structures and strike-slipping structures had been developed in the basin.Different slipping directions brought about completely different effects on the evolution of the basin: sinistral strike caused extrusion while dextral strike slip resulted in extension and subsidence in the basin.The combination of tensile stress and shear stress shaped the area into a strike slip-extensional composite basin after several uplifting and subsidence cycles.

Key words: Cenozoic, tectonic movement, structural framework, strike slip-extension, composite basin, Zhong-jiannan basin

CLC Number:

111.2

Gao Hongfang, Chen Lin. An analysis of structural framework and formation mechanism of Zhongjiannan basin in the west of South China Sea[J]. Oil & Gas Geology, 2006, 27(4): 512-516.

References

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An analysis of structural framework and formation mechanism of Zhongjiannan basin in the west of South China Sea

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