马尼拉海沟俯冲带增生楔中天然气水合物的流体运移通道

现代地质 ›› 2010, Vol. 24 ›› Issue (3): 441-449.

• 天然气水合物专辑：地质学 • 上一篇下一篇

马尼拉海沟俯冲带增生楔中天然气水合物的流体运移通道

陈志豪^1,2,3,吴能友^1,2,李家彪³

1.中国科学院广州能源研究所可再生能源与天然气水合物重点实验室，广东广州510640；2.中国科学院广州天然气水合物
研究中心，广东广州510640；3.国家海洋局第二海洋研究所海底科学重点实验室，浙江杭州310012

出版日期:2010-06-21 发布日期:2010-08-17
通讯作者: 吴能友，男，研究员， 1965年出生，海洋地质学专业，主要从事海洋地质、天然气水合物、石油天然气资源调查与研究。
作者简介:陈志豪，男，研究实习员，1981年出生，海洋地质学专业，主要从事天然气水合物研究工作。 Email: chenzh@ms.giec.ac.cn.
基金资助:
国土资源部公益性行业科研专项基金项目（200811014）；国家自然科学基金-广东联合基金项目（U0933004）；中国科学院知识创新工程重要方向项目（KGCX2-YW-805）；国家自然科学基金项目（40676024）。

Pathway of Fluid Migration for Gas Hydrate in the Accretionary Wedge of Manila Subduction Zone, Northeastern South China Sea

CHEN Zhi hao ^1,2,3, WU Neng you ^1,2, LI Jia biao ³

1.Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences,
Guangzhou, Guangdong510640,China; 2.Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences,
Guangzhou, Guangdong510640, China; 3.Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography,
State Oceanic Administration, Hangzhou，Zhejiang310012, China

Online:2010-06-21 Published:2010-08-17

摘要/Abstract

摘要：

南海东北部海域水深、沉积厚度大、沉积速率高和有机质含量丰富，为马尼拉增生楔中天然气水合物成藏提供了必要的气源，且相应适宜的温压条件以及构造背景也有利于天然气水合物的形成与赋存，其中马尼拉俯冲带俯冲前缘以及增生楔中的断裂系统成为天然气水合物成藏的非常重要的运移通道。通过对地震剖面中断裂系统和三维地貌图的精细解释，分析了马尼拉海沟俯冲带存在的海沟前缘正断层、海沟轴部的盲断层以及增生楔中的盲冲断层或逆冲断层，直到最后发育成隔断叠瓦状岩片的逆冲断层组，这些断裂系统反映出增生楔上天然气水合物的含气流体的形成、运移及聚集过程，成为天然气水合物成藏的运移通道。

关键词: 天然气水合物, 增生楔, 断裂系统, 运移通道, 马尼拉海沟俯冲带

Abstract:

Great depth of water and thickness of sediment, high rate of deposition and rich content of organic matter in northeastern South China Sea provide the formation of gas hydrate with the necessary gas supply.In addition, the appropriate condition of temperature and pressure and tectonic setting are favorable to the occurrence of gas hydrate.Specially, the fault system in the deformation front and accretionary wedge of Manila subduction zone is proved to be the pathway of gasbearing fluid migration of gas hydrate.Based on the marine geology of northeastern South China Sea or offshore of southwestern Taiwan, multiplechannel seismic profiles and high resolution subbottom 3Dtopographic images interpreted and analyzed, it is found that there are many normal faults in the deformation front, blind faults in the trench axis and (blind) thrusts in the accretionary wedge, which developed into thrust group that divided into the imbricate thrust sheets.The all faults and thrusts make up a fault system, constituting of normal faults, blind faults and (blind) thrusts.The fault system mentioned above not only reflects the process of South China Sea plate diving underneath of Luzon island arc, but also is regarded as the channel of fluid migration, indicating the process of formation, migration and concentration for fluid of gas hydrate in accretionary wedge.

Key words: gas hydrate, accretionary wedge, fault system, migration channel;Manila subduction zone

中图分类号:

P744.4

陈志豪, 吴能友, 李家彪. 马尼拉海沟俯冲带增生楔中天然气水合物的流体运移通道[J]. 现代地质, 2010, 24(3): 441-449.

CHEN Zhi-Hao, Wu Neng-You, LI Jia-Biao. Pathway of Fluid Migration for Gas Hydrate in the Accretionary Wedge of Manila Subduction Zone, Northeastern South China Sea[J]. Geoscience, 2010, 24(3): 441-449.

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马尼拉海沟俯冲带增生楔中天然气水合物的流体运移通道

Pathway of Fluid Migration for Gas Hydrate in the Accretionary Wedge of Manila Subduction Zone, Northeastern South China Sea

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