干旱区生态环境知识资源中心(Arid): Geochemical characteristics, depositional environment, and provenance attitude of the Middle Jurassic Yangye Formation lacustrine mudstones in Kashi Sag, south-western Tarim Basin

Arid

DOI	10.1002/gj.3556
	Geochemical characteristics, depositional environment, and provenance attitude of the Middle Jurassic Yangye Formation lacustrine mudstones in Kashi Sag, south-western Tarim Basin
	Wang, Jingbin 1,2,3; He, Zhiliang 1,2,3; Zhu, Dongya 2,3; Ding, Qian 2,3
通讯作者	Wang, Jingbin
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2020
卷号	55 期号:4 页码:2976-2994
英文摘要	Middle Jurassic mudstones from the Yangye Formation are widely exposed in the Kashi Sag and regarded as significant potential source rocks. Geochemical characteristics of mudstones in the Keziletao Depression have been analysed to decipher their source-area weathering, provenance, tectonic setting, and depositional environment that have received significantly little attention. Mudstones are characterized by high Ca, U, Th, and REE contents when compared to those of PAAS. Their total REE abundances range from 155.2 to 234.2 ppm, with the enrichment of LREEs and distinct negative Eu anomalies, implying a principal felsic provenance. Various indicators (e.g., CIA, Th/Sc, ICV, and Rb/Sr) and A-CN-K ternary diagram suggest parental rocks experienced a moderate to intense chemical weathering degree and simple recycling and sorting. Furthermore, paleoenvironmental indexes (e.g., B, S, Sr/Ba, C, Sr/Cu, and V/(V + Ni)) indicate that they were likely deposited in a suboxic to anoxic freshwater setting, with semi-arid to semi-humid paleoclimatic conditions during the deposition of Yangye Formation. The geochemical data also demonstrate that the provenances were derived predominantly from the unroofing of felsic rocks with a minor intermediate supply. These parental rocks were commonly formed in the continental island arc, active continental margin, and/or collision tectonic settings. The results of this study, combined with published data, suggest the West Kunlun Orogen and thrusting zone to the west and south-west of the basin were probably arrested to provide substantial detritus for sediments, stimulating a better understanding for the formation mechanism of the Yangye Formation sediments (especially for potential source rocks) in the Kashi Sag.
英文关键词	depositional environment Kashi Sag provenance tectonic setting Yangye Formation
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000475828100001
WOS关键词	EARTH-ELEMENT GEOCHEMISTRY ; RARE-EARTH ; SEDIMENTARY-ROCKS ; NORTHWEST CHINA ; KUNLUN OROGEN ; CLASTIC ROCKS ; OIL-SHALE ; TRACE ; CONSTRAINTS ; ORIGIN
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/2XILL650/215964
作者单位	1.China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China; 2.SINOPEC, State Key Lab Shale Oil & Gas Enrichment Mech & E, Beijing, Peoples R China; 3.SINOPEC, Petr Explorat & Prod Res Inst, Lab Struct & Sedimentol Reservoir Geol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jingbin,He, Zhiliang,Zhu, Dongya,et al. Geochemical characteristics, depositional environment, and provenance attitude of the Middle Jurassic Yangye Formation lacustrine mudstones in Kashi Sag, south-western Tarim Basin[J],2020,55(4):2976-2994.
APA	Wang, Jingbin,He, Zhiliang,Zhu, Dongya,&Ding, Qian.(2020).Geochemical characteristics, depositional environment, and provenance attitude of the Middle Jurassic Yangye Formation lacustrine mudstones in Kashi Sag, south-western Tarim Basin.GEOLOGICAL JOURNAL,55(4),2976-2994.
MLA	Wang, Jingbin,et al."Geochemical characteristics, depositional environment, and provenance attitude of the Middle Jurassic Yangye Formation lacustrine mudstones in Kashi Sag, south-western Tarim Basin".GEOLOGICAL JOURNAL 55.4(2020):2976-2994.