EVOLUTIONARY MODEL AND CONTROL FACTORS OF XISHA CARBONATE BUILDUP

MA Yubo; WU Shiguo; DU Xiaohui; LU Yintao; GU Mingfeng; ZHAO Hanting

doi:10.3724/SP.J.1140.2011.04059

2011 Vol. 31, No. 4

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Article navigation > Marine Geology & Quaternary Geology > 2011 > 31(4): 59-67

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MA Yubo, WU Shiguo, DU Xiaohui, LU Yintao, GU Mingfeng, ZHAO Hanting. EVOLUTIONARY MODEL AND CONTROL FACTORS OF XISHA CARBONATE BUILDUP[J]. Marine Geology & Quaternary Geology, 2011, 31(4): 59-67. doi: 10.3724/SP.J.1140.2011.04059

Citation:

MA Yubo, WU Shiguo, DU Xiaohui, LU Yintao, GU Mingfeng, ZHAO Hanting. EVOLUTIONARY MODEL AND CONTROL FACTORS OF XISHA CARBONATE BUILDUP[J]. Marine Geology & Quaternary Geology, 2011, 31(4): 59-67. doi: 10.3724/SP.J.1140.2011.04059

EVOLUTIONARY MODEL AND CONTROL FACTORS OF XISHA CARBONATE BUILDUP

1 MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, AGS, Beijing 100037, China;
2 Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
3 China Geological Library, Beijing 100083, China;
4 Hangzhou Research Institute of Petroleum Geology, Petrochina, Hangzhou 310023, China

Received Date: 12 March 2011

Revised Date: 16 April 2011

Abstract

Abstract

Carbonate buildups started growing up in the Late Oligocene on the edge of the Xisha Islands and structural highs. Sequence analysis and drilling well facies analysis suggest that a carbonate buildup may consist of various facies, such as the lime sand island facies, reef flat facies, bindstone facies, reef framework facies and backreef lagoon facies etc. In seismic profiles, the carbonate platform usually occurs as a positive landform with high amplitude at the top, low amplitude and chaotic reflection inside, and an ambiguous boundary at the bottom. Large scale carbonate buildups usually have high amplitude, continuous reflection and a flat top. We proposed in this study a sedimentary model for the Xisha carbonate buildup with respect to relative sea level changes. The rise of relative sea level leads to the retreat of carbonate buildup toward the structure highs, while dropping of the relative sea level causes the lateral accretion of the carbonate buildup towards the sea, leaving a lagoon behind the buildup. Besides, tectonic movement, terrigenous clastic input and temperature and salinity of sea water also influence the development of the carbonate buildup.
- Carbonate buildup /
- Xisha Islands /
- Sedimentary model /
- Master control factors /
- Relative sea-level

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References

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