Submarine slide and mud volcanism activities in gas hydrate bearing area on the northeastern slope, South China Sea

Liu Boran; Song Haibin; Guan Yongxian; Bai Yang; Chen Jiangxin; Geng Minghui

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Liu Boran, Song Haibin, Guan Yongxian, Bai Yang, Chen Jiangxin, Geng Minghui. Submarine slide and mud volcanism activities in gas hydrate bearing area on the northeastern slope, South China Sea[J]. Haiyang Xuebao, 2015, 37(9): 59-70.

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Submarine slide and mud volcanism activities in gas hydrate bearing area on the northeastern slope, South China Sea

1.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Marine Geology, Tongji University, shanghai 200092, China
3.
Guangzhou Marine Geology Survey, Guangzhou 510075, China

Received Date: 2014-12-17
Rev Recd Date: 2015-03-16

Abstract

Abstract

In this paper,seabed morphology features related to submarine slide and mud volcanism activities are presented and analyzed,their impacts to gas hydrate formation and decomposition are discussed,and two models of slide driven and slide-mud volcano driven are proposed. Dataset used in this paper including seismic lines,sub-bottom profiler lines and bathymetry data obtained from seabed reflection picking. The study area consists of two main landforms: "regular slide region",and "mud volcanism activities affected region". We identify characteristic features such as mud volcano,mud volcano ridge,groove and pit from the bathymetry map. Submarine slide and mud volcanism activities play significant roles in affecting the morphology of the gas hydrate distribution region on the northeastern slope of South China Sea. Combining the analyses of BSR(Bottom Simulating Reflector) and mud volcanoes' distribution,relations between BSR discontinuity and mud volcano occurrence,we know that BSRs are continuous and gas hydrate reservoir is almost complete one in the regular slide region,while there is less and local destruction for the gas hydrate reservoir in the mud volcanism affected region slide and mud volcanism activities are important for long-term natural gas releasing process in the studied area.
- northeastern slope of South China Sea,
- gas hydrate,
- submarine slide,
- mud volcano ridge,

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References

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