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HE Jian, LIANG Qianyong, MA Yun, SHI Yaohong, XIAO Zhen. 2018. Geohazards types and their distribution characteristics in the natural gas hydrate area on the northern slope of the South China Sea[J]. Geology in China, 45(1): 15-28. doi: 10.12029/gc20180102
Citation: HE Jian, LIANG Qianyong, MA Yun, SHI Yaohong, XIAO Zhen. 2018. Geohazards types and their distribution characteristics in the natural gas hydrate area on the northern slope of the South China Sea[J]. Geology in China, 45(1): 15-28. doi: 10.12029/gc20180102
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Geohazards types and their distribution characteristics in the natural gas hydrate area on the northern slope of the South China Sea

  • 1.

    Guangzhou Marine Geological Survey, CGS, Guangzhou 510760, Guangdong, China

  • 2.

    MLR Key Laboratory of Marine Mineral Resources, Guangzhou 510760, Guangdong, China

  • 3.

    Civil and Architectural School of Yangtze Normal University, Chongqing 408100, China

    • Fund Project: Supported by "Investigation and Evaluation of Environmental Effect of Gas Hydrate in the South China Sea" Program of China Geological Survey (No. DD20160217)
More Information
  • Author Bio: HE Jian, male, born in 1987, master, majors in mineral survey and exploration; E-mail:oilgeo@qq.com
  • Corresponding author: MA Yun, female, born in 1986, doctor, , E-mail:honeysucle0539@126.com 
Received Date:  24 January 2018
Revised Date:  05 February 2018
Publish Date:  25 February 2018
    Abstract

  • Integrated investigation has revealed that the northern slope of the South China Sea (SCS) is a favorable place for gas hydrate accumulation and hence has stored a large amount of hydrate resources. Natural gas hydrates are mostly developed in areas of complex tectonic activity which are also areas of high-risk geological disasters. Potential hazard geological factors constitute great threats to the storage and commercial exploitation of gas hydrate. Based on a large number of 2D, 3D seismic profiles and multi-beam data acquired by the Guangzhou Marine Geological Survey over the years in the gas hydrate development zone in the northern part of the South China Sea, the authors conducted the seabed disaster geological study on the northern slope of the South China Sea. In this paper, the geomorphological features, the types, characteristics, genesis and distribution characteristics of the geohazards related to gas hydrate in the study area were comprehensively analyzed. The relationship between the geohazards and hydrate formation and decomposition was also discussed. The results of the study were used to predict the mineralization of gas hydrates on the northern slope of the South China Sea, thus providing a data basis for future disaster risk assessment and decisionmaking.

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