干旱区生态环境知识资源中心(Arid): Depositional model for a salinized lacustrine basin: The Permian Lucaogou Formation, Jimsar Sag, Junggar Basin, NW China

Arid

DOI	10.1016/j.jseaes.2018.08.021
	Depositional model for a salinized lacustrine basin: The Permian Lucaogou Formation, Jimsar Sag, Junggar Basin, NW China
	Yang, Yongqiang 1,2; Qiu, Longwei 1; Wan, Ming 3; Jia, Xiyu 3; Cao, Yingchang 1; Lei, Dewei 3; Qu, Changsheng 1
通讯作者	Qiu, Longwei
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
EISSN	1878-5786
出版年	2019
卷号	178 页码:81-95
英文摘要	Fine-grained sedimentary rocks are well developed in a salinized lacustrine basin in the Junggar Basin, China. Understanding the sedimentary characteristics and process of these fine-grained sediments is essential to find the exploration target for tight oil. In this study, the sedimentary characteristics and forming mechanism of fine-grained sediments in the Permian Lucaogou Formation within the Jimsar Sag were investigated based on core and thin section observation, SEM combined with XRD and geochemical data, and eleven lithofacies were identified, including (1) brecciated dolomitic mudstone, (2) intraclastic conglomerate, (3) mixed siliciclastic and intraclastic grainstone, (4) dolomitic siltstone, (5) Carbonate packstone and grainstone, (6) dolomitic mudstone, (7) laminated algae-bearing tuffaceous mudstone, (8) massive tuffaceous mudstone, (9) turbidite dolomitic mudstone to siltstone, (10) pebbled sandstone, and (11) green mudstone and siltstone. The organic constituents in the fine-grained sedimentary rocks include sapropelic, exinite, vitrinite, inertinite and secondary macerals, which are dominated by unstructured algae and asphaltene. The fine-grained sedimentary rocks are characterized by high-frequency cycles composed of three successive facies associations: profundal, littoral-sublittoral and palustrine, which recorded distinct lacustrine expansion and contraction. Developed mud cracks, paleosols and vertical dissolution fractures in the fine-grained sedimentary rocks indicate that these facies recorded the depositional process in an ephemeral to perennial lake in an arid climate. Fluvio-deltaic and aeolian transport were main modes for transporting the siliciclastic component that ultimately accumulated in a subaqueous and subaerial environment. The dolomite in the littoral zone might develop with the evaporitic concentration of the lake water during the early diagenetic stage. The depositional processes in the profundal zone included suspension and turbidity currents. Multiphase volcanic activities affected the lithofacies and prompted the accumulation of organic matter. Understating the depositional process of the fine-grained sedimentary rocks in the Lucaogou Formation in the Jimsar Sag is helpful to understand the depositional environment in the salinized lacustrine basin in the Junggar Basin.
英文关键词	Depositional model Salinized lacustrine basin Lucaogou Formation Jimsar Sag Junggar Basin
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000470042600007
WOS关键词	GREEN RIVER FORMATION ; TIGHT OIL-RESERVOIR ; WILKINS PEAK MEMBER ; BLACK SHALES ; JIMUSAER SAG ; UINTA BASIN ; SOURCE-ROCK ; EOCENE ; SEDIMENTS ; 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/2XILL650/216808
作者单位	1.China Univ Petr, Sch Geosci, Qingdao 266580, Shandong, Peoples R China; 2.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Shandong, Peoples R China; 3.Xinjiang Oilfield Co, Res Inst Explorat & Dev, Karamay 834000, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yongqiang,Qiu, Longwei,Wan, Ming,et al. Depositional model for a salinized lacustrine basin: The Permian Lucaogou Formation, Jimsar Sag, Junggar Basin, NW China[J],2019,178:81-95.
APA	Yang, Yongqiang.,Qiu, Longwei.,Wan, Ming.,Jia, Xiyu.,Cao, Yingchang.,...&Qu, Changsheng.(2019).Depositional model for a salinized lacustrine basin: The Permian Lucaogou Formation, Jimsar Sag, Junggar Basin, NW China.JOURNAL OF ASIAN EARTH SCIENCES,178,81-95.
MLA	Yang, Yongqiang,et al."Depositional model for a salinized lacustrine basin: The Permian Lucaogou Formation, Jimsar Sag, Junggar Basin, NW China".JOURNAL OF ASIAN EARTH SCIENCES 178(2019):81-95.