SOURCE REGIONS AND THE SEDIMENTARY PALEOENVIRONMENT OF MARINE OIL SHALE;FROM THE BILONG CO AREA, NORTHERN TIBET, CHINA: AN SR-ND ISOTOPIC STUDY

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	SOURCE REGIONS AND THE SEDIMENTARY PALEOENVIRONMENT OF MARINE OIL SHALE;FROM THE BILONG CO AREA, NORTHERN TIBET, CHINA: AN SR-ND ISOTOPIC STUDY
	Fu, Xiugen; Wang, Jian; Zeng, Yuhong; Tan, Fuwen; Feng, Xinglei
刊名	OIL SHALE
	2012
卷号	29 期号:4 页码:306-321
关键词	marine oil shale Sr-Nd isotope source region paleoenvironmental change Qiangtang basin northern Tibet China
ISSN号	051OR
英文摘要	The Bilong Co oil shale zone is located in the South Qiangtang depression, northern Tibet, southwestern China. This zone, together with the Shengli River-Changshe Mountain oil shale zone in the North Qiangtang depression, northern Tibetan Plateau, potentially represents the largest marine oil shale resource in China. Altogether 18 samples of oil shale and micritic limestone were collected from the Bilong Co area to determine their Sr and Nd isotopic composition, as well as discuss sediment sources and paleoenvironmental changes. The Sm-Nd model ages for the Bilong Co oil shale samples support its derivation from the Nadi Kangra source whose model ages reflect the origin of volcanic rocks from the older continental crust by its melting. The Nd isotopic composition of the Bilong Co oil shale is similar to that of Late Triassic Nadi Kangri Formation volcanic-volcaniclastic rocks, which implies that this oil shale stems from said rocks.;Generally, the vertical variations of epsilon(Nd)(0) values in the Bilong Co oil shale section are relatively homogeneous, suggesting a stable provenance for sediments.;The Sr-87/Sr-86 ratio of the Bilong Co oil shale is much higher than that of contemporary seawater. Such a high Sr-87/Sr-86 ratio reflects the original composition of the deposited sediment, both chemical and clastic. In the Bilong Co oil shale area, micritic limestone generally has a slightly lower Sr-87/Sr-86 ratio than oil shale. The Sr isotopic fluctuation in the Bilong Co oil shale is closely connected with sea level change. Sea level rise and consequent marine incursion may change the aquatic environment of the pre-existing lagoon, lowering the Sr-87/Sr-86 ratio of the precipitation fluid.
学科主题	油气地质
WOS关键词	EVOLUTION ; GEOCHEMISTRY ; CARBONATES ; MONSOON ; ROCKS ; BASIN ; SEA
WOS研究方向	Energy & Fuels ; Engineering, Petroleum
语种	英语
出版者	This work was supported by the National Natural Science Foundation of;China (Grants 41172098, 40972087), the Sichuan Youth Science &;Technology Foundation (No. 09ZQ026-006), and the National Oil and Gas;Special Project (No. XQ-2009-01).
WOS记录号	WOS:000312137400002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39508]
专题	中国地质调查局成都地质调查中心
作者单位	Chengdu Inst Geol & Mineral Resources, Chengdu 610081, Peoples R China.
推荐引用方式 GB/T 7714	Fu, Xiugen,Wang, Jian,Zeng, Yuhong,et al. SOURCE REGIONS AND THE SEDIMENTARY PALEOENVIRONMENT OF MARINE OIL SHALE;FROM THE BILONG CO AREA, NORTHERN TIBET, CHINA: AN SR-ND ISOTOPIC STUDY[J]. OIL SHALE,2012,29(4):306-321.
APA	Fu, Xiugen,Wang, Jian,Zeng, Yuhong,Tan, Fuwen,&Feng, Xinglei.(2012).SOURCE REGIONS AND THE SEDIMENTARY PALEOENVIRONMENT OF MARINE OIL SHALE;FROM THE BILONG CO AREA, NORTHERN TIBET, CHINA: AN SR-ND ISOTOPIC STUDY.OIL SHALE,29(4),306-321.
MLA	Fu, Xiugen,et al."SOURCE REGIONS AND THE SEDIMENTARY PALEOENVIRONMENT OF MARINE OIL SHALE;FROM THE BILONG CO AREA, NORTHERN TIBET, CHINA: AN SR-ND ISOTOPIC STUDY".OIL SHALE 29.4(2012):306-321.