干旱区生态环境知识资源中心(Arid): Rift-related sedimentary evolution and its response to tectonics and climate changes: A case study of the Guaizihu sag, Yingen-Ejinaqi Basin, China

Arid

DOI	10.1016/j.jseaes.2020.104370
	Rift-related sedimentary evolution and its response to tectonics and climate changes: A case study of the Guaizihu sag, Yingen-Ejinaqi Basin, China
	Hou, Yunchao; Wang, Hongyu; Fan, Tailiang; Zhang, Hongan; Yang, Runze; Li, Yifan; Long, Shengfang
通讯作者	Wang, HY
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2020
卷号	195
英文摘要	Distinguished from most existing rift basin evolutionary models, the succession of deep-water deposits in the Guaizihu sag were mainly developed during rift initiation instead of the greatest tectonic subsidence phase. This paper focuses on the detailed analysis of rift-related sequence stratigraphy and sedimentary evolution in this continental rift sag, and discusses tectonic and climatic controls on filling patterns. The deposits of the Guaizihu sag can be ascribed to four major depositional systems: alluvial fan and fan delta, braided delta, sublacustrine fan and shallow to deep lacustrine deposits. They are in part contemporaneous and some succeeding each other, forming five sequence units and corresponding substages of basin evolution: (i) rift initiation, (ii) early rift climax, (iii) middle rift climax, (iv) late rift climax, and (v) late syn-rift substages. With the onset of fault movement and hot-humid climate conditions, the first substage is characterized by a number of poorly linked depocenters, which consist of alluvial fan, fan delta and deep lacustrine deposits with organic-rich mudstones. The second substage is associated with an enhanced activity of border faults and block rotation. This unit is dominated by lacustrine deposits, but fan or braided delta and sublacustrine fans also can be observed. The third substage is marked by the maximum subsidence rate and shallow lakes fringed by fan and braided deltas. The arid environment is likely to be the main factor controlling the lithofacies and filling characteristics of this unit. During the fourth substage two early sub-sags gradually converged to form a uniform one. The relative tectonic quiescence and climate fluctuations (sub-humid to sub-arid) favored carbonate deposition. The late syn-rift unit, which is dominated by fine-grained deposits, is a consequence of degradation of source area (mostly tectonic). This study shows that the effects of tectonics and climate on lacustrine sedimentation are intimately interwoven. Tectonism determines the sag structure, stratigraphic architecture, and spatial distribution pattern of depositional systems. Climatic conditions superimposed on tectonics tends to be the major control on sediment supply, lithofacies types and sedimentary features.
英文关键词	Continental rift basin Depositional systems Sequence stratigraphy Controlling factors Tectonic evolution Guaizihu sag
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000536141200021
WOS关键词	BOHAI BAY BASIN ; DENSITY TURBIDITY CURRENTS ; HALF-GRABEN ; DEBRIS-FLOW ; FAN-DELTAS ; SEQUENCE STRATIGRAPHY ; DEPOSITIONAL SYSTEMS ; ALLUVIAL DEPOSITS ; TAMTSAG BASIN ; BRAID DELTAS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324565
作者单位	[Hou, Yunchao; Wang, Hongyu; Fan, Tailiang; Li, Yifan] China Univ Geosci, Beijing 100083, Peoples R China; [Hou, Yunchao; Wang, Hongyu; Fan, Tailiang; Li, Yifan] China Univ Geosci, Key Lab Marine Reservoir Evolut & Hydrocarbon Acc, Minist Educ China, Beijing 100083, Peoples R China; [Zhang, Hongan] SINOPEC Zhongyuan Oilfield Co, Puyang 457001, Peoples R China; [Yang, Runze] PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China; [Long, Shengfang] PetroChina Bohai Drilling Engn Co, Tianjin 300280, Peoples R China; [Hou, Yunchao] PetroChina Changqing Oilfield Co, Xian 710018, Peoples R China
推荐引用方式 GB/T 7714	Hou, Yunchao,Wang, Hongyu,Fan, Tailiang,et al. Rift-related sedimentary evolution and its response to tectonics and climate changes: A case study of the Guaizihu sag, Yingen-Ejinaqi Basin, China[J],2020,195.
APA	Hou, Yunchao.,Wang, Hongyu.,Fan, Tailiang.,Zhang, Hongan.,Yang, Runze.,...&Long, Shengfang.(2020).Rift-related sedimentary evolution and its response to tectonics and climate changes: A case study of the Guaizihu sag, Yingen-Ejinaqi Basin, China.JOURNAL OF ASIAN EARTH SCIENCES,195.
MLA	Hou, Yunchao,et al."Rift-related sedimentary evolution and its response to tectonics and climate changes: A case study of the Guaizihu sag, Yingen-Ejinaqi Basin, China".JOURNAL OF ASIAN EARTH SCIENCES 195(2020).