Structural characteristics and tectonic division of the Zambezi Delta basin in the offshore East Africa: evidences from gravity and seismic data

doi:10.1007/s13131-024-2338-3

IOCAS-IR > 海洋地质与环境重点实验室

	Structural characteristics and tectonic division of the Zambezi Delta basin in the offshore East Africa: evidences from gravity and seismic data
	Fan, Guozhang 1; Li, Wen 2; Ding, Liangbo 1; Wang, Wanyin 2,3,4; Wang, Hongping 1; Wang, Dingding 2,5; Li, Lin 1; Wang, Hao 2; Wang, Chaofeng1 ; Wang, Qingluan 2; Zhang, Ying 1
	2024-04-01
发表期刊	ACTA OCEANOLOGICA SINICA
ISSN	0253-505X
卷号	43 期号:4 页码:105-118
通讯作者	Wang, Wanyin([email protected])
摘要	The Zambezi Delta basin is a passive marginal basin located on the East African coast that has good oil and gas exploration potential. Due to the special geological evolutionary background of the Beira High in the Zambezi Delta basin, it has a low gravity anomaly, and the existing seismic survey lines do not cover the whole basin; therefore, it is difficult to interpret the structural characteristics of the whole basin based solely on gravity or seismic data. Based on satellite altimetry gravity anomaly data, this study infers the distribution characteristics of faults in the Zambezi Delta basin by using the normalized vertical derivative of the total horizontal derivative (NVDR-THDR) technique. Then, constrained by seismic data, the gravity anomaly at the Moho interface is extracted by using the fast forward method of the double-interface model of the gravity anomaly, and this anomaly is then removed from the Bouguer gravity anomaly to obtain the sedimentary layer gravity anomaly. The thickness of the sedimentary strata is obtained by inversing the sedimentary basement depth of the whole basin. Then, uplifts and depressions are divided based on a sedimentary layer thickness of 3 km. This research demonstrates that the Zambezi Delta basin mainly features nearly SN-trending and NE-trending faults and that these faults exhibit east-west partitioning. The nearly SN-trending strike-slip faults controlled the sedimentary development of the basin, and the NE-trending tensile faults may have acted as migration channels for oil, gas and magma. The "overcompensation" effect of the Moho interface gravity anomaly on the gravity anomaly of the sedimentary layer is caused by the depression of the Moho interface beneath the Beira High, which results in a low gravity anomaly value for the Beira High. The pattern of uplifts and depressions trends NE and has the structural characteristics of east-west blocks.
关键词	Zambezi Delta basin satellite altimetry gravity anomaly Beira High fault division uplift and depression pattern
DOI	10.1007/s13131-024-2338-3
收录类别	SCI
语种	英语
资助项目	Petrochina Basic Prospective Science and Technology Research Project-Overseas deepwater ultra-deepwater oil and gas exploration technology research topic[2021DJ2403]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001269641500008
出版者	SPRINGER
WOS关键词	POTENTIAL-FIELD DATA ; CRUSTAL STRUCTURE ; BREAK-UP ; MOZAMBIQUE ; MAGMATISM ; INSIGHTS ; MARGIN
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186261
专题	海洋地质与环境重点实验室
通讯作者	Wang, Wanyin
作者单位	1.PetroChina, Hangzhou Res Inst Petr Geol, Hangzhou 310023, Peoples R China 2.Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Peoples R China 3.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 4.Natl Engn Res Ctr Offshore Oil & Gas Explorat, Beijing 100028, Peoples R China 5.Univ Naples Federico II, Dept Earth Environm & Resources Sci, I-80138 Naples, Italy
推荐引用方式 GB/T 7714	Fan, Guozhang,Li, Wen,Ding, Liangbo,et al. Structural characteristics and tectonic division of the Zambezi Delta basin in the offshore East Africa: evidences from gravity and seismic data[J]. ACTA OCEANOLOGICA SINICA,2024,43(4):105-118.
APA	Fan, Guozhang.,Li, Wen.,Ding, Liangbo.,Wang, Wanyin.,Wang, Hongping.,...&Zhang, Ying.(2024).Structural characteristics and tectonic division of the Zambezi Delta basin in the offshore East Africa: evidences from gravity and seismic data.ACTA OCEANOLOGICA SINICA,43(4),105-118.
MLA	Fan, Guozhang,et al."Structural characteristics and tectonic division of the Zambezi Delta basin in the offshore East Africa: evidences from gravity and seismic data".ACTA OCEANOLOGICA SINICA 43.4(2024):105-118.