| 南海北部陆坡天然气水合物区地质灾害类型及其分布特征 |
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| 引用本文： | 何健,梁前勇,马云,石要红,夏真.南海北部陆坡天然气水合物区地质灾害类型及其分布特征[J].中国地质,2018,45(1):15-28. |
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| 作者姓名： | 何健 梁前勇 马云 石要红 夏真 |
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| 作者单位： | 中国地质调查局广州海洋地质调查局, 广东 广州 510760;国土资源部海底矿产资源重点实验室, 广东 广州 510760,中国地质调查局广州海洋地质调查局, 广东 广州 510760;国土资源部海底矿产资源重点实验室, 广东 广州 510760,长江师范学院土木建筑工程学院, 重庆 涪陵 408100,中国地质调查局广州海洋地质调查局, 广东 广州 510760;国土资源部海底矿产资源重点实验室, 广东 广州 510760,中国地质调查局广州海洋地质调查局, 广东 广州 510760;国土资源部海底矿产资源重点实验室, 广东 广州 510760 |
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| 基金项目： | 中国地质调查局项目“南海天然气水合物环境效应评价”（DD20160217）资助。 |
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| 摘 要： | 南海北部陆坡区存在着有利天然气水合物的成藏条件,综合调查及钻探结果揭示南海北部陆坡区蕴藏着丰富的天然气水合物资源,天然气水合物多发育在构造活动复杂地区,同时也是灾害地质因素高发区,潜在的灾害地质因素对水合物的赋存及商业开发是极大的威胁。本文基于广州海洋地质调查局多年来在南海北部天然气水合物发育区采集的大量2D、3D、浅地层剖面及多波束测深资料对南海北部水合物发育区进行海底灾害地质研究,对研究区地形地貌特征、灾害地质因素类型、特征、成因及分布特征进行了综合分析,同时阐述了灾害地质因素与水合物的形成与分解之间的关系,研究结果对南海北部陆坡区天然气水合物区成矿预测、试采井布置及未来灾害风险评价提供了基础数据和决策依据。
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| 关 键 词： | 南海北部陆坡 天然气水合物 灾害地质 海底滑坡 |
| 收稿时间： | 2018/1/24 0:00:00 |
| 修稿时间： | 2018/2/5 0:00:00 |
Geohazards types and their distribution characteristics in the natural gas hydrate area on the northern slope of the South China Sea |
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| HE Jian,LIANG Qianyong,MA Yun,SHI Yaohong and XIAO Zhen.Geohazards types and their distribution characteristics in the natural gas hydrate area on the northern slope of the South China Sea[J].Chinese Geology,2018,45(1):15-28. |
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| Authors: | HE Jian LIANG Qianyong MA Yun SHI Yaohong and XIAO Zhen |
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| Affiliation: | Guangzhou Marine Geological Survey, CGS, Guangzhou 510760, Guangdong, China;MLR Key Laboratory of Marine Mineral Resources, Guangzhou 510760, Guangdong, China,Guangzhou Marine Geological Survey, CGS, Guangzhou 510760, Guangdong, China;MLR Key Laboratory of Marine Mineral Resources, Guangzhou 510760, Guangdong, China,Civil and Architectural School of Yangtze Normal University, Chongqing 408100, China,Guangzhou Marine Geological Survey, CGS, Guangzhou 510760, Guangdong, China;MLR Key Laboratory of Marine Mineral Resources, Guangzhou 510760, Guangdong, China and Guangzhou Marine Geological Survey, CGS, Guangzhou 510760, Guangdong, China;MLR Key Laboratory of Marine Mineral Resources, Guangzhou 510760, Guangdong, China |
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| 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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| Keywords: | northern slope of SCS gas hydrate geohazards submarine landsides |
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