干旱区生态环境知识资源中心(Arid): Climate-ocean control on the depositional watermass conditions and organic matter enrichment in lower cambrian black shale in the upper Yangtze Platform

Arid

DOI	10.1016/j.marpetgeo.2020.104570
	Climate-ocean control on the depositional watermass conditions and organic matter enrichment in lower cambrian black shale in the upper Yangtze Platform
	Wang, Ning; Li, Meijun; Tian, Xingwang; Hong, Haitao; Wen, Long; Wang, Wenzhi
通讯作者	Li, MJ
来源期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
EISSN	1873-4073
出版年	2020
卷号	120
英文摘要	The lower Cambrian sediments including the Qiongzhusi and Maidiping formations in the Sichuan Basin are generally considered as the main source rocks of Precambrian-Cambrian petroleum system. A comprehensive study integrated with multiple geochemical methods was conducted on 119 lower Cambrian drillcore samples collected from the upper Yangtze Platform. The results show that the fluctuation of sea level and climate during the deposition of the Qiongzhusi and Maidiping formations act as the critical factors controlling the watermass conditions and thus OM accumulation. During the deposition of upper Maidiping Formation (epsilon(1)m), the paleo-climate was arid and sea level was relatively low in the study area. The depositional environment indexes (U-EF-Mo-EF, gammacerane index, beta-camtane and V-EF) suggested that the upper epsilon(1)m was deposited in a strong restricted marine setting with high water salinity and anoxic water conditions in Ziyang-Weiyuan area. However, during the early Qiongzhusi Formation period, the paleoclimate became humid and sea level rose in the study area. High paleoproductiviy caused by high concentrations of nutrients brought by seawater and freshwater plays an important role in OM accumulation in the basal part of the Qiongzhusi Formation (epsilon(1)q). Furthermore, the model of paleopmductivity promotion caused by the coordinated control of climate and extensive transgression in the lower part of Gig may also be applicable to interpret the origin of high organic carbon abundance in the strata deposited in the same period with the epsilon(1)q (such as Shiyantou, Shuijingtuo and Niutitang formations) in other parts of the upper Yangtze Platform.
英文关键词	Black shale Depositional environment Primary paleoproductivity Paleoclimate condition
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000569012400001
WOS关键词	PB ZIRCON AGES ; NIUTITANG FORMATION ; SICHUAN BASIN ; CARBON ISOTOPE ; SOUTH CHINA ; GEOCHEMISTRY ; ACCUMULATION ; TRACE ; PRODUCTIVITY ; ENVIRONMENT
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/2XILL650/326263
作者单位	[Wang, Ning; Li, Meijun] Yangtze Univ, Coll Resources & Environm, Key Lab Explorat Technol Oil & Gas Resources, Minist Educ, Wuhan 430100, Peoples R China; [Wang, Ning; Li, Meijun] China Univ Petr, Coll Geosci, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China; [Tian, Xingwang; Hong, Haitao; Wen, Long; Wang, Wenzhi] Southwest Oil & Gas Field Co, Explorat & Dev Res Inst, PetroChina, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ning,Li, Meijun,Tian, Xingwang,et al. Climate-ocean control on the depositional watermass conditions and organic matter enrichment in lower cambrian black shale in the upper Yangtze Platform[J],2020,120.
APA	Wang, Ning,Li, Meijun,Tian, Xingwang,Hong, Haitao,Wen, Long,&Wang, Wenzhi.(2020).Climate-ocean control on the depositional watermass conditions and organic matter enrichment in lower cambrian black shale in the upper Yangtze Platform.MARINE AND PETROLEUM GEOLOGY,120.
MLA	Wang, Ning,et al."Climate-ocean control on the depositional watermass conditions and organic matter enrichment in lower cambrian black shale in the upper Yangtze Platform".MARINE AND PETROLEUM GEOLOGY 120(2020).