REE geochemistry of marine oil shale from the Changshe Mountain area, northern Tibet, China

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	REE geochemistry of marine oil shale from the Changshe Mountain area, northern Tibet, China
	Fu, XG (Fu, Xiugen); Wang, J (Wang, Jian); Zeng, YH (Zeng, Yuhong); Tan, FW (Tan, Fuwen); Feng, XL (Feng, Xinglei)
刊名	INTERNATIONAL JOURNAL OF COAL GEOLOGY
	2010
卷号	81 期号:3 页码:191-199
关键词	Marine oil shale Rare earth elements Qiangtang basin China
ISSN号	0166-5162
英文摘要	The Shengli River-Changshe Mountain oil shale zone, located in the North Qiangtang depression, northern Tibet plateau, represents a potentially large marine oil shale resource in China. The contents and distribution patterns of rare earth elements (REEs) in selected oil shale and micritic limestone samples from the Changshe Mountain area were studied by inductively-coupled plasma mass spectrometer (ICP-MS). Analyzed oil shale samples from the Changshe Mountain area are characterized by high total organic carbon (TCC) contents (7.02-16.32%) and ash yields (53.22-82.12%) with shale oil contents from 3.85% to 11.76%. The total rare earth element (Sigma REE) contents in oil shale samples are 68.19 mu g/g, close to those of US coals, and higher than those of micritic limestone samples (37.69 mu g/g) from the Changshe Mountain area, but lower than those of world-wide black shales, common Chinese coals, and North American Shale Composite. There are two types, A and B, of distribution patterns of REEs in the Changshe Mountain oil shale samples. Type A shows negligible Ce anomalies (0.97-1.01), with slightly higher Sigma REE concentrations (36.87-118.38 mu g/g) and LREE/HREE (6.79-10.74) and (La/Yb)(n) (6.68-8.36) ratios, whereas type B exhibits a slightly negative Ce anomaly (0.84-0.88), with slightly lower Sigma REE concentrations (13.73-15.31 mu g/g) and LREE/HREE (5.54-6.34) and (La/Yb)(n) (5.03-6.65) ratios. Both types A and B oil shales are characterized by distinctly sloping LREE trends (La(n)/Sm(n) 3.60-5.44) accompanied by flat HREE trends, with distinct Eu negative anomalies (0.51-0.69). The vertical variations of Sigma REE contents are similar to those of ash, Si, Al, K, Na, Ti and Fe, and show a negative correlation with organic sulfur and organic carbon, indicating that the REE contents in oil shale seams are mainly controlled by land-derived detritus. (C) 2009 Elsevier B.V. All rights reserved.
学科主题	变质岩岩石学
WOS关键词	RARE-EARTH-ELEMENTS ; TRACE-ELEMENTS ; SOUTHWESTERN CHINA ; INNER-MONGOLIA ; COAL ; COALFIELD ; MINERALOGY ; DISTRICT ; DEPOSIT ; LIGNITE
WOS研究方向	Energy & Fuels ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000275741300006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39107]
专题	中国地质调查局
作者单位	Sichuan Univ, Coll Chem, Chengdu 610065, Peoples R China
推荐引用方式 GB/T 7714	Fu, XG ,Wang, J ,Zeng, YH ,et al. REE geochemistry of marine oil shale from the Changshe Mountain area, northern Tibet, China[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2010,81(3):191-199.
APA	Fu, XG ,Wang, J ,Zeng, YH ,Tan, FW ,&Feng, XL .(2010).REE geochemistry of marine oil shale from the Changshe Mountain area, northern Tibet, China.INTERNATIONAL JOURNAL OF COAL GEOLOGY,81(3),191-199.
MLA	Fu, XG ,et al."REE geochemistry of marine oil shale from the Changshe Mountain area, northern Tibet, China".INTERNATIONAL JOURNAL OF COAL GEOLOGY 81.3(2010):191-199.