气候变化领域集成服务门户(CCPortal): Seismic geomorphology of three types of deepwater fans and their relationship with slope morphology: Qiongdongnan Basin, northern South China Sea

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DOI	10.1016/j.marpetgeo.2020.104814
	Seismic geomorphology of three types of deepwater fans and their relationship with slope morphology: Qiongdongnan Basin, northern South China Sea
	Li, Chao; Chen, Guojun; Zhou, Qianshan; Yang, Haizhang; Lyu, Chengfu; Guo, Shuai; Sun, Rui; Ma, Ming
通讯作者	Zhou, QS (通讯作者)，382 West Donggang Rd, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0264-8172
EISSN	1873-4073
卷号	124
英文摘要	Analyses of high-resolution seismic reflection, drilling, and well-log data were combined to identify and investigate deepwater fans developed in the eastern part of the Qiongdongnan Basin, South China Sea, during the Middle Miocene and their relationship to slope morphology. We identified three types of deepwater fans that developed on the northern continental margin of the South China Sea during the Middle Miocene: (1) those consisting of small canyons and depositional lobes; (2) those consisting of large canyons and depositional lobes; and (3) those consisting of distributary channels without depositional lobes. Sourced from deltaic sediments deposited on the northern continental shelf margin, the lithologies of the sediments in all fans are dominated by siltstone. The scale of development and the internal features are mainly controlled by the slope topography. The deepwater fans consisting of small canyons and depositional lobes developed on slopes with low gradient, caused by the continuous progradation of the shelf-edge towards the basin centre due to sediment transport in high-speed flows. The canyon heads developed in this setting are located below the shelf-break; these canyons are narrower, shallower, and shorter than those of the deepwater fans consisting of large canyons. Thus, the scale of the depositional lobes deposited by gravity flow through such canyons is smaller than that of deepwater fans with large depositional lobes. Deepwater fans consisting of large canyons and depositional lobes developed on steep narrow slopes, caused by rising shelf-edge trajectories due to the equilibrium between the sediment supply and subsidence rates. The canyon heads developed in this setting are located upon the shelf-break and extend toward the toe of the slope, incising the shelf-break; these canyons are wider, deeper, and longer than those of the deepwater fans consisting of small canyons. The scale of the depositional lobes deposited by gravity flows transported through such canyons is correspondingly larger than that of deepwater fans with small depositional lobes. Deepwater fans consisting of distributary channels without depositional lobes developed on gentler and wider slopes than slopes where small canyons and depositional lobes formed, owing to the low sediment supply. The deepwater distributary channels have a long transportation distance and wider distribution area, enabling the formation of large-scale deepwater fans. Depositional models for all three types of deepwater fans were postulated.
关键词	MASS-TRANSPORT COMPLEXES ESPIRITO-SANTO BASIN SUBMARINE FANS YINGGEHAI BASIN SHELF-MARGIN ARCHITECTURE SYSTEM EVOLUTION PATTERNS SEDIMENTATION
英文关键词	Deepwater fan; Seismic geomorphology; Depositional model; Qiongdongnan basin; Northern South China Sea
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000605736200001
来源期刊	MARINE AND PETROLEUM GEOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254047
作者单位	[Li, Chao; Chen, Guojun; Zhou, Qianshan; Lyu, Chengfu; Ma, Ming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Li, Chao; Chen, Guojun; Zhou, Qianshan; Lyu, Chengfu; Ma, Ming] Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China; [Yang, Haizhang; Guo, Shuai; Sun, Rui] Res Inst China Natl Offshore Oil Corp, Beijing 100028, Peoples R China
推荐引用方式 GB/T 7714	Li, Chao,Chen, Guojun,Zhou, Qianshan,et al. Seismic geomorphology of three types of deepwater fans and their relationship with slope morphology: Qiongdongnan Basin, northern South China Sea[J]. 中国科学院西北生态环境资源研究院,2021,124.
APA	Li, Chao.,Chen, Guojun.,Zhou, Qianshan.,Yang, Haizhang.,Lyu, Chengfu.,...&Ma, Ming.(2021).Seismic geomorphology of three types of deepwater fans and their relationship with slope morphology: Qiongdongnan Basin, northern South China Sea.MARINE AND PETROLEUM GEOLOGY,124.
MLA	Li, Chao,et al."Seismic geomorphology of three types of deepwater fans and their relationship with slope morphology: Qiongdongnan Basin, northern South China Sea".MARINE AND PETROLEUM GEOLOGY 124(2021).