气候变化领域集成服务门户(CCPortal): Organic Geochemical Characteristics of Saline Lacustrine Source Rocks: A Case Study from the Yingxi Area, Qaidam Basin, China

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DOI	10.1134/S0016702921150015
	Organic Geochemical Characteristics of Saline Lacustrine Source Rocks: A Case Study from the Yingxi Area, Qaidam Basin, China
	Xing, Lan-tian; Xu, Li; Zhang, Ping-zhong; Zhang, Jing; Wang, Peng
通讯作者	Xing, LT (通讯作者)，Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Gansu, Peoples R China. ; Xing, LT (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2022
ISSN	0016-7029
EISSN	1556-1968
起始页码	92
结束页码	108
卷号	60 期号:1
英文摘要	Based on the systematic analyses of samples collected from the western Qaidam basin, the organic geochemical characteristics of representative Paleogene saline lacustrine carbonate source rocks were synthetically studied. The results show that the carbonate source rocks are characterized by total organic carbon (TOC) content varied in the range of 0.07 to 1.57%, with an average of 1%, and hydrocarbon generation potential (S-1 + S-2) is range from 0.2 to 9.61 mg HC/g rock with an average of 4.6 mg HC/g rock, and organic matters of Types II1 and Type I, which indicated that it belongs to high-quality carbonate source rocks. Meanwhile, the T-max of source rock range from 409 to 438 degrees C and productivity index (PI) varied in the range of 0.09 to 0.38, which imply that the source rock in immaturity to low-maturity phase. The biomarker compositions are characterized by the Pr/Ph ratio of the source rocks is 0.36, and the gammacerane/alpha beta-C-30 hopane ratio up to 1.25, these data reflect that the presence of a highly reducing saline environment. Meanwhile, a high abundance of C-27 sterane and bicyclic terpane indicates that aquatic algae are the main organic parent material. The identification of microscopic organic components of samples also reveals an abundance of the Botryococcus braunii fossil of up to 30% with strong yellow fluorescence. These results, together with comparison research of crude oil and source rocks, show that the saline lacustrine carbonate source rocks from the Yingxi area deposited under an anoxic and saline environment at the stage of low maturity. This study provides guidance for predicting the distributions of high-quality source rocks in the western Qaidam basin.
关键词	CARBONATE SOURCE ROCKS DEPOSITIONAL ENVIRONMENT OIL GENERATION PRISTANE PHYTANE PYROLYSIS SEDIMENTS TERTIARY COAL
英文关键词	continental saline lacustrine; carbonate source rocks; geochemical characteristics; hydrocarbon generation; biomarker; Qaidam Basin
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000756837600008
来源期刊	GEOCHEMISTRY INTERNATIONAL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254114
作者单位	[Xing, Lan-tian; Zhang, Ping-zhong; Wang, Peng] Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Gansu, Peoples R China; [Xing, Lan-tian] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China; [Xu, Li] Petrol China, Res Inst Petr Explorat & Dev Northwest, Lanzhou 730000, Gansu, Peoples R China; [Zhang, Jing] Petrolchina Qinhai Oilfield, Res Inst Explorat & Dev, Dunhuang 736202, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xing, Lan-tian,Xu, Li,Zhang, Ping-zhong,et al. Organic Geochemical Characteristics of Saline Lacustrine Source Rocks: A Case Study from the Yingxi Area, Qaidam Basin, China[J]. 中国科学院西北生态环境资源研究院,2022,60(1).
APA	Xing, Lan-tian,Xu, Li,Zhang, Ping-zhong,Zhang, Jing,&Wang, Peng.(2022).Organic Geochemical Characteristics of Saline Lacustrine Source Rocks: A Case Study from the Yingxi Area, Qaidam Basin, China.GEOCHEMISTRY INTERNATIONAL,60(1).
MLA	Xing, Lan-tian,et al."Organic Geochemical Characteristics of Saline Lacustrine Source Rocks: A Case Study from the Yingxi Area, Qaidam Basin, China".GEOCHEMISTRY INTERNATIONAL 60.1(2022).