Gas Hydrate Accumulation Related to Pockmarks and Faults in the Zhongjiannan Basin, South China Sea

doi:10.3389/feart.2022.902469

IOCAS-IR > 海洋地质与环境重点实验室

	Gas Hydrate Accumulation Related to Pockmarks and Faults in the Zhongjiannan Basin, South China Sea
	Zhang, Guangxu 1,2,7; Wang, Xiujuan 2,3,8; Li, Lin 4; Sun, Luyi 1,2,7; Guo, Yiqun 5; Lu, Yintao4 ; Li, Wei 6; Wang, Zhaoqi 4; Qian, Jin 1,2,7; Yang, Taotao 4; Wang, Wenlong 1,2,7
	2022-06-17
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	10 页码:18
通讯作者	Wang, Xiujuan(wangxiujuan@ouc.edu.cn) ; Li, Lin(lilin_hz@petrochina.com.cn)
摘要	The amplitude and coherence attributes of three-dimensional (3D) seismic data are used to confirm gas hydrate occurrence and to delineate its distribution in the Zhongjiannan basin, South China Sea. High amplitude anomalies (HAAs) are distributed above or below the regional base of gas hydrate stability zone (BGHSZ), which intersect with the bottom simulating reflectors (BSRs) or are interrupted by different types of pockmarks. The maximum amplitude attribute extracted along T1 (5.5 Ma) horizon is controlled by the widely distributed faults. The layer-bound polygonal faults (PFs) show networks of small normal faults, and the dominant orientations of PFs are similar or orthogonal to the regional tectonic faults, which provide the fluid migration pathways for gas and fluids to form HAAs. BSR shows the strong amplitude and continuous reflection where the faults or PFs can reach the BGHSZ without the influence of the pockmarks. Most of the pockmarks are related to the reactivation of faults and magmation, and some pockmarks are caused by the dissociation of gas hydrate. Around the matured pockmark, the BSR is discontinuous, and HAAs locally appear within the pockmarks. The inverted acoustic impedance profile shows obviously high values of HAAs except in pockmark zones. Partial HAAs occur above BGHSZ, and the continuity is interrupted by the pockmarks with only high values around the pockmarks. We propose that BSR, HAAs, pockmarks, and different types of faults are closely related to the occurrence and distribution of gas hydrates in the study area. This work allows us to understand the relationship between gas hydrate occurrence and accumulation with pockmarks, faults, and magmatic activities.
关键词	gas hydrate high amplitude anomalies polygonal fault pockmarks Zhongjiannan basin
DOI	10.3389/feart.2022.902469
收录类别	SCI
语种	英语
资助项目	Shandong Special Fund of Pilot National Laboratory for Marine Science and Technology (Qingdao)[2021QNLM020002] ; National Natural Science Foundation of China[42076219] ; China Academy of Petroleum Exploration and Development[2019B-4909] ; CAS Pioneer Hundred Talents Program
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000819865300001
出版者	FRONTIERS MEDIA SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/179671
专题	海洋地质与环境重点实验室
通讯作者	Wang, Xiujuan; Li, Lin
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Ocean Univ China, MOE, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, Qingdao, Peoples R China 4.Petrochina Hangzhou Res Inst Geol, Hangzhou, Peoples R China 5.China Geol Survey, Haikou Marine Geol Survey Ctr, Haikou, Peoples R China 6.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou, Peoples R China 7.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 8.Ocean Univ China, MOE, Qingdao, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhang, Guangxu,Wang, Xiujuan,Li, Lin,et al. Gas Hydrate Accumulation Related to Pockmarks and Faults in the Zhongjiannan Basin, South China Sea[J]. FRONTIERS IN EARTH SCIENCE,2022,10:18.
APA	Zhang, Guangxu.,Wang, Xiujuan.,Li, Lin.,Sun, Luyi.,Guo, Yiqun.,...&Wang, Wenlong.(2022).Gas Hydrate Accumulation Related to Pockmarks and Faults in the Zhongjiannan Basin, South China Sea.FRONTIERS IN EARTH SCIENCE,10,18.
MLA	Zhang, Guangxu,et al."Gas Hydrate Accumulation Related to Pockmarks and Faults in the Zhongjiannan Basin, South China Sea".FRONTIERS IN EARTH SCIENCE 10(2022):18.