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The morphologies and genesis of mega-pockmarks near the Xisha Uplift, South China Sea

文献类型：期刊论文

作者Sun, Qiliang1,2; Wu, Shiguo1; Hovland, Martin3,4; Luo, Peng5; Lu, Yintao6; Qu, Tailai7; Sun, QL (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China, Peoples R China
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2011-06-01
卷号28期号:6页码:1146-1156
关键词Mega-pockmarks Bottom Currents Fluid Flow Crescentic Pockmarks South China Sea
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2011.03.003
文献子类Article
英文摘要Pockmarks are normally regarded to be manifestations of fluids escape through the seabed. Kilometer-wide depressions, here called mega-pockmarks occur as widespread features near the Xisha Uplift, northern South China Sea. Most of the pockmarks observed in this area are multi-kilometers and much larger than normal-pockmarks reported worldwide. The maximum diameter observed is 3210 m and the maximum depth observed is 165.2 m based on multibeam data and 2D seismic data. The pockmarks are circular, elliptical and crescentic in plan view. Seismic profiles show that the genesis of pockmarks is related to fluid (gas and/or pore water) escape. According to the fluids pathways, the pockmarks fall into four types: (1) gas chimney-related; (2) depositional boundary-related; (3) gas chimney and inclined structure (fault)-related; (4) inclined structure-related. Bottom currents are strong and complex in the study area. The multibeam data and seismic profiles indicate that they may play an important role on extension, maintenance and shaping of pockmarks. The research of the study area is in its initial stage, and the identification of these features as indicators of fluid flow is probably useful for hydrocarbon exploration. (C) 2011 Elsevier Ltd. All rights reserved.; Pockmarks are normally regarded to be manifestations of fluids escape through the seabed. Kilometer-wide depressions, here called mega-pockmarks occur as widespread features near the Xisha Uplift, northern South China Sea. Most of the pockmarks observed in this area are multi-kilometers and much larger than normal-pockmarks reported worldwide. The maximum diameter observed is 3210 m and the maximum depth observed is 165.2 m based on multibeam data and 2D seismic data. The pockmarks are circular, elliptical and crescentic in plan view. Seismic profiles show that the genesis of pockmarks is related to fluid (gas and/or pore water) escape. According to the fluids pathways, the pockmarks fall into four types: (1) gas chimney-related; (2) depositional boundary-related; (3) gas chimney and inclined structure (fault)-related; (4) inclined structure-related. Bottom currents are strong and complex in the study area. The multibeam data and seismic profiles indicate that they may play an important role on extension, maintenance and shaping of pockmarks. The research of the study area is in its initial stage, and the identification of these features as indicators of fluid flow is probably useful for hydrocarbon exploration. (C) 2011 Elsevier Ltd. All rights reserved.
学科主题Geology
URL标识查看原文
语种英语
WOS记录号WOS:000290199300002
公开日期2012-07-03
源URL[http://ir.qdio.ac.cn/handle/337002/11544]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Sun, QL (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China, Peoples R China
作者单位1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Univ Bergen, Ctr Geobiol, N-5014 Bergen, Norway
4.Statoil ASA, Stavanger, Norway
5.Supervis & Technol Co, CNOOC Energy Technol & Serv Ltd, Tianjin 300452, Peoples R China
6.PetroChina Hangzhou Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China
7.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Qiliang,Wu, Shiguo,Hovland, Martin,et al. The morphologies and genesis of mega-pockmarks near the Xisha Uplift, South China Sea[J]. MARINE AND PETROLEUM GEOLOGY,2011,28(6):1146-1156.
APA Sun, Qiliang.,Wu, Shiguo.,Hovland, Martin.,Luo, Peng.,Lu, Yintao.,...&Sun, QL .(2011).The morphologies and genesis of mega-pockmarks near the Xisha Uplift, South China Sea.MARINE AND PETROLEUM GEOLOGY,28(6),1146-1156.
MLA Sun, Qiliang,et al."The morphologies and genesis of mega-pockmarks near the Xisha Uplift, South China Sea".MARINE AND PETROLEUM GEOLOGY 28.6(2011):1146-1156.

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来源：海洋研究所

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