干旱区生态环境知识资源中心(Arid): Sedimentary environment and the controlling factors of organic-rich rocks in the Lucaogou Formation of the Jimusar Sag,Junggar Basin,NW China

Arid

	Sedimentary environment and the controlling factors of organic-rich rocks in the Lucaogou Formation of the Jimusar Sag,Junggar Basin,NW China
	Qu Changsheng; Qiu Longwei; Cao Yingchang; Yang Yongqiang; Yu Kuanhong
来源期刊	Petroleum Science
ISSN	1672-5107
出版年	2019
卷号	16 期号:4 页码:763-775
英文摘要	The Lucaogou Formation in the Jimusar Sag of the eastern Junggar Basin is an important sedimentary stratum accumulating huge amounts of lacustrine tight oil in China,where organic-rich rocks are commonly observed.Focusing on the Lucaogou Formation,a precise analysis of the inorganic and organic petrology and the inorganic geochemistry characteristics was conducted.The paleoclimate and paleoenvironment during sedimentation of the Lucaogou Formation were established,and the key factors that were controlling the accumulation of organic matter during this time were identified.The results of this study suggest that during the sedimentation of the Lucaogou Formation,the paleoclimate periodically changed from a humid environment to an arid environment.As a result,the salinity of the water and the redox environment fluctuated.During the sedimentation period,the lake showed sufficient nutrient supplies and a high primary productivity.The interval studies in the Lucaogou Formation were divided into five sedimentary cycles,where the first,second,and fifth sedimentary cycles consisted of cyclical paleoclimate fluctuations varied from a humid environment to an arid environment and shifted back to a humid environment with levels of salinity from low to high and decreased again.The third and fourth cycles have cyclical fluctuations from a humid to an arid environment and corresponding salinity variation between low and high levels.During the period when organic-rich rocks in the Lucaogou Formation deposited in the Jimusar Sag,the paleoclimate and the water body were suitable for lower aquatic organisms to flourish.As a result,its paleoproductivity was high,especially during the early period of each cycle.A quiet deep water body is likely to form an anoxic environment at the bottom and is also good for accumulation and preservation of organisms.Fine-grained sediments were accumulated at a low deposition rate,with a low dilution of organic matter.Therefore,high paleoproductivity provided a sufficient volume of organisms in the studied area in a quiet deep water body with an anoxic environment and these were the key factors controlling formation of organic-rich rocks.
英文关键词	Organic-rich rocks Paleoenvironment Lucaogou Formation Jimusar Sag Junggar Basin
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	CSCD
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6669200
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336233
作者单位	Qu Changsheng, School of Geosciences,China University of Petroleum(Qingdao);;Shandong University of Science and Technology, ;;, Qingdao;;Qingdao, Shandong;;Shandong 266580;;266590.; Qiu Longwei, School of Geosciences,China University of Petroleum(Qingdao);;China University of Petroleum(Qingdao), ;;Key Laboratory of Deep Oil and Gas Geology and Geophysics,Ministry of Education, Qingdao;;Qingdao, Shandong;;Shandong 266580;;266580.; Cao Yingchang, School of Geosciences,China University of Petroleum(Qingdao);;China University of Petroleum(Qingdao), ;;Key Laboratory of Deep Oil and Gas Geology and Geophysics,Ministry of Education, Qingdao;;Qingdao, Shandong;;Shandong 266580;;266580.; Yang Yongqiang, School of Geosciences,China University of Petroleum(Qingdao);;China University of Petroleum(Qingdao), ;;Key Laboratory of Deep Oil and Gas Geology and Geophysics,Ministry of Education, Qingdao;;Qingdao, Shandong;;Shandong 266580;;266580.; Yu Kuanhong, School of Geosciences,China University of Petroleum(Qingdao);;Ch...
推荐引用方式 GB/T 7714	Qu Changsheng,Qiu Longwei,Cao Yingchang,et al. Sedimentary environment and the controlling factors of organic-rich rocks in the Lucaogou Formation of the Jimusar Sag,Junggar Basin,NW China[J],2019,16(4):763-775.
APA	Qu Changsheng,Qiu Longwei,Cao Yingchang,Yang Yongqiang,&Yu Kuanhong.(2019).Sedimentary environment and the controlling factors of organic-rich rocks in the Lucaogou Formation of the Jimusar Sag,Junggar Basin,NW China.Petroleum Science,16(4),763-775.
MLA	Qu Changsheng,et al."Sedimentary environment and the controlling factors of organic-rich rocks in the Lucaogou Formation of the Jimusar Sag,Junggar Basin,NW China".Petroleum Science 16.4(2019):763-775.