Strontium Isotope Composition and Characteristic Analysis of Cambrian-Ordovician Carbonate in the Region of Tazhong, Tarim Basin

	Strontium Isotope Composition and Characteristic Analysis of Cambrian-Ordovician Carbonate in the Region of Tazhong, Tarim Basin
	Huang Wenhui 1; Yang Min 1; Yu Bingsong 1; Fan Tailiang 1; Chu Guangzhen 1; Wan Huan 1; Zhu Jingquan 2; Wang Xu 2; Wu Shiqiang 2
刊名	JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES
	2006-09-01
卷号	17 期号:3 页码:246-257
关键词	Tarim Basin Carbonate Rock Strontium Element Strontium Isotope Diagenesis
ISSN号	1002-0705
文献子类	Article
英文摘要	The research on the trace elements of Ordovician carbonates plays an important part in the whole work on reservoir in Tazhong (sic) area. This paper systematically studies the characteristics and sedimentary settings of Ordovician dolomites in Tazhong area, Tarim basin, and debates their enrichment of mechanisms and different element existing patterns. The study makes use of ICP-MS analysis technology to test the strontium and manganese content of 109 samples from four wells in the Tazhong area, Tarim basin and strontium isotope composition tests have also been done on 25 samples from wells Zhong-1 and Zhong-4 on VG354 solid isotope mass spectrograph. By means of analyzing contents of strontium and manganese elements, doing research on the strontium isotope composition characteristics from wells Zhong-1 and Zhong-4 and comparing the results of strontium analysis to the global Ordovician marine carbonate and its evolution trend, in the combination of sedimentary facies characteristics of isolated wells in this area, we can come to the following cognitions: (1) The marine carbonate strontium isotope curve in the Tazhong area of Tarim basin is consistent to the global evolution trend which is overall descending with time, the direct reason of which is the evolution of paleogeographic environment. The Ordovician paleogeographic environment goes through restricted platform to open platform and then shallow marine shelf in Tazhong area, Tarim basin. Dolomitization is another subordinate reason and the inversion of fluid with high manganese can lead to heavy strontium; (2) The fact that the (87) Sr/(86) Sr ratios of the Upper Ordovician in Tazhong area have an apparent mono-decline trend with the time going by, which is similar to the global strontium isotope ratio, is suggesting that the variation of the Upper Ordovician sea level is starting, the overall trend of which is the rising of the sea level; (3) Compared to the global seawater strontium ratios, the (87) Sr/(86) Sr ratio of the Lower Ordovician is much high, and (87) Sr/(86) Sr ratio of the Lower Ordovician is overall increasing with its maximum value reaching 0. 709 727, the reasons of which are dolomitization, evaporation of the supratidal and the reflux of high manganese haline, those reasons can lead to the increasing amount of the strontium and the rising of the (87) Sr/(86) Sr ratio; (4) The manganese element content changes little. Dolomitization has little impact on it; (5) Big variation occurs in the strontium values of Ordovician carbonate in the region of Tazhong. Apart from paleogeographic environment and petrography, the factors which can affect the values of strontium are the content of the terrestrial clastics and the diagenesis modification which may result in the further changing of the strontium values.
WOS研究方向	Geology
语种	英语
出版者	CHINA UNIV GEOSCIENCES
WOS记录号	WOS:000205885500008
资助机构	973 Project of China(2005CB422103) ; 973 Project of China(2005CB422103) ; China Petrochemical Corporation ; China Petrochemical Corporation ; 973 Project of China(2005CB422103) ; 973 Project of China(2005CB422103) ; China Petrochemical Corporation ; China Petrochemical Corporation ; 973 Project of China(2005CB422103) ; 973 Project of China(2005CB422103) ; China Petrochemical Corporation ; China Petrochemical Corporation ; 973 Project of China(2005CB422103) ; 973 Project of China(2005CB422103) ; China Petrochemical Corporation ; China Petrochemical Corporation
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/66106]
专题	中国科学院地质与地球物理研究所
通讯作者	Huang Wenhui
作者单位	1.China Univ Geosci, Sch Energy Resources, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Huang Wenhui,Yang Min,Yu Bingsong,et al. Strontium Isotope Composition and Characteristic Analysis of Cambrian-Ordovician Carbonate in the Region of Tazhong, Tarim Basin[J]. JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES,2006,17(3):246-257.
APA	Huang Wenhui.,Yang Min.,Yu Bingsong.,Fan Tailiang.,Chu Guangzhen.,...&Wu Shiqiang.(2006).Strontium Isotope Composition and Characteristic Analysis of Cambrian-Ordovician Carbonate in the Region of Tazhong, Tarim Basin.JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES,17(3),246-257.
MLA	Huang Wenhui,et al."Strontium Isotope Composition and Characteristic Analysis of Cambrian-Ordovician Carbonate in the Region of Tazhong, Tarim Basin".JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES 17.3(2006):246-257.