干旱区生态环境知识资源中心(Arid): Sedimentary cycles of evaporites and their application in sequence division in the upper member of the Xiaganchaigou Formation in Yingxi Area, Southwestern Qaidam Basin, China

Arid

DOI	10.1007/s13146-020-00603-7
	Sedimentary cycles of evaporites and their application in sequence division in the upper member of the Xiaganchaigou Formation in Yingxi Area, Southwestern Qaidam Basin, China
	Xu, Bin; Li, Jianming; Wu, Zhiping; Zhang, Yongshu; Cui, Jun
通讯作者	Li, JM
来源期刊	CARBONATES AND EVAPORITES
ISSN	0891-2556
EISSN	1878-5212
出版年	2020
卷号	35 期号:3
英文摘要	The upper member of the Xiaganchaigou Formation in the Yingxi Area of the Southwestern Qaidam Basin is a set of evaporite-bearing lacustrine series. In this study, petrographic analyses of rock thin sections, cores, drillings, logging as well as geochemistry were used to study the characteristics of the sedimentary cycles of the series. Concurrently, this study adopts a transgressive-regressive (T-R) cycle sequence theory, based on lithology, logging curves, the stacking pattern of the subsequences, and unconformity and seismic reflection terminal relations. This approach uses evaporites as the primary marker layer for identifying the initial lake flood surface and dividing the sequence of the evaporite-bearing series in the upper member of the Xiaganchaigou Formation. Results show a zonal distribution of evaporites transitioning laterally from the center to the margin of the basin to mixed carbonate rocks and then to clastic rocks. Vertically, there are two third-order sedimentary cycles and six fourth-order sedimentary cycles. Five types of evaporite lithofacies combinations were identified. Evaporites were formed by evaporative crystallization at a particular depth beneath lake water during a lacustrine regression during an arid paleo-climate and rapid subsidence of the basin basement. It has been established based on the asymmetric sedimentary cycle development model that during the lacustrine transgression stage, the mixed carbonate rocks were transformed into mudstone upward, and during the lacustrine regression stage, the mixed carbonate rocks transformed into gypsum rocks, glauberite, and halite, upward, while a delta and reef flat limestones developed at the edge of the basin. There is a one-to-one correspondence between the T-R cycle sequence division and the sedimentary cycle division.
英文关键词	Southwestern Qaidam basin Yingxi area Xiaganchaigou Formation Evaporites Sedimentary cycles Sequence division
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000542579100001
WOS关键词	STRUCTURAL BELT ; GENESIS
WOS类目	Geology
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/2XILL650/324820
作者单位	[Xu, Bin; Wu, Zhiping] China Univ Petr East China, Sch Geosci, Qingdao 266580, Peoples R China; [Li, Jianming] Yangtze Univ, Sch Geosci, Wuhan 430100, Peoples R China; [Li, Jianming] Hubei Cooperat Innovat Ctr Unconvent Oil & Gas, Wuhan 430100, Peoples R China; [Zhang, Yongshu; Cui, Jun] Qinghai Oilfield Co, PetroChina, Explorat & Dev, Res Inst, Dunhuang 736202, Peoples R China
推荐引用方式 GB/T 7714	Xu, Bin,Li, Jianming,Wu, Zhiping,et al. Sedimentary cycles of evaporites and their application in sequence division in the upper member of the Xiaganchaigou Formation in Yingxi Area, Southwestern Qaidam Basin, China[J],2020,35(3).
APA	Xu, Bin,Li, Jianming,Wu, Zhiping,Zhang, Yongshu,&Cui, Jun.(2020).Sedimentary cycles of evaporites and their application in sequence division in the upper member of the Xiaganchaigou Formation in Yingxi Area, Southwestern Qaidam Basin, China.CARBONATES AND EVAPORITES,35(3).
MLA	Xu, Bin,et al."Sedimentary cycles of evaporites and their application in sequence division in the upper member of the Xiaganchaigou Formation in Yingxi Area, Southwestern Qaidam Basin, China".CARBONATES AND EVAPORITES 35.3(2020).