Using in situ REE analysis to study the origin and diagenesis of dolomite of Lower Paleozoic, Tarim Basin

doi:10.1007/s11430-009-0057-4

	Using in situ REE analysis to study the origin and diagenesis of dolomite of Lower Paleozoic, Tarim Basin
	Wang XiaoLin 2; Jin ZhiJun 1; Hu WenXuan 2; Zhang JunTao 2; Qian YiXiong 3; Zhu JingQuan 4; Li Qing 2
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2009-05-01
卷号	52 期号:5 页码:681-693
关键词	dolomite origin diagenesis in situ REE distribution Lower Paleozoic Tarim Basin
ISSN号	1006-9313
DOI	10.1007/s11430-009-0057-4
文献子类	Article
英文摘要	In situ REE concentrations of various dolomites from Tarim Basin were obtained by LA-ICP-MS analysis, and the data were normalized to standard seawater (Seawater Normalized=SWN). Most of the samples have a I REE pound range of less than 20 ppm. All samples show similar REE(SWN) distributions with heavy REE depletion, and positive Ce anomaly, which indicates that they have the same dolomitization fluids (seawater). According to the origin and diagenetic process of dolomite, two types of dolomite are determined and described as follows: 1) syndepositional dolomite, with the highest REE concentrations (more than 20 ppm), the cores of which are more enriched in REE compared with their cortexes, indicating that they underwent the dolomitization of calcareous sediments by hypersaline and subsequent diagenesis decreased the REE content of the cortex because of the low REE concentration of the diagenetic fluids; 2) diagenetic dolomite, which can be subdivided into four groups. (1) burial dolomite which has higher REE concentrations than limestone, but lower than syndepositional dolomite. This shows that pore fluids with high salinity dolomitized the pre-existing limestone; (2) void filling dolomite which has the similar REE patterns with the matrix dolomite. In addition, the Eu anomaly is not obvious, suggesting that the dolomitization fluids originated from the diagenetic fluids; (3) recrystallized dolomite, whose REE concentration was obviously decreased, indicating that the REE concentration was decreased during the recrystallization processes; and (4) hydrothermal altered void-filling dolomite, which has the lowest REE concentration, but obvious positive Eu anomaly, reflecting its hydrothermal activity related origin. Thus, the diverse REE signatures, which were recorded in different dolomites, retain the information of their formation conditions and subsequent diagenetic processes. In situ REE analysis of dolomite is an effective probe into the origin and diagenetic process of dolomite.
WOS关键词	RARE-EARTH-ELEMENT ; PLASMA-MASS SPECTROMETRY ; MID-ATLANTIC RIDGE ; TRACE-ELEMENT ; AQUEOUS GEOCHEMISTRY ; HYDROTHERMAL FLUIDS ; ISOTOPIC VARIATIONS ; SEAWATER REE ; CARBONATES ; SEDIMENTS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000265924500011
资助机构	National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103) ; National Basic Research Program of China(2005CB422103)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70934]
专题	中国科学院地质与地球物理研究所
通讯作者	Jin ZhiJun
作者单位	1.SINOPEC, Petr Explorat & Dev Inst, Beijing 100083, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210093, Peoples R China 3.SINOPEC NW Oil Field Branch, Urumqi 830011, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang XiaoLin,Jin ZhiJun,Hu WenXuan,et al. Using in situ REE analysis to study the origin and diagenesis of dolomite of Lower Paleozoic, Tarim Basin[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(5):681-693.
APA	Wang XiaoLin.,Jin ZhiJun.,Hu WenXuan.,Zhang JunTao.,Qian YiXiong.,...&Li Qing.(2009).Using in situ REE analysis to study the origin and diagenesis of dolomite of Lower Paleozoic, Tarim Basin.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(5),681-693.
MLA	Wang XiaoLin,et al."Using in situ REE analysis to study the origin and diagenesis of dolomite of Lower Paleozoic, Tarim Basin".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.5(2009):681-693.