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Formation of saddle dolomites in Upper Cambrian carbonates, western Tarim Basin (northwest China): Implications for fault-related fluid flow

文献类型：期刊论文

作者Zhang, Juntao1; Hu, Wenxuan1; Qian, Yixiong2; Wang, Xiaolin1; Cao, Jian1; Zhu, Jingquan3; Li, Qing1; Xie, Xiaomin1
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2009-09-01
卷号26期号:8页码:1428-1440
关键词Saddle dolomite Fault-related fluid flow The Upper Cambrian The western Tarim Basin
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2009.04.004
文献子类Article
英文摘要The saddle dolomites occur more intensely in cores closely to fault than that in cores far away from the fault in Upper Cambrian carbonate of western Tarim basin, suggesting that formation of the saddle dolomites is likely related to fault-controlled fluid flow. They partially fill in fractures and vugs of replacement dolomite. The saddle dolomites exhibit complex internal textures, commonly consisting of core and cortex. In comparison with the matrix dolomites, the saddle dolomites show lower Sr-content and (87)Sr/(86)Sr ratios, higher Fe- and Mn-content, and more negative delta(18)O values. Combined with high Th (100-130 degrees C) of primary fluid inclusions, it is suggested that the saddle dolomites precipitated from hydrothermal fluid derived from the deep evaporite-bearing Middle Cambrian strata, and the magnesium source may be due to dissolution of host dolomite during hydrothermal fluid migration. Fault activity resulted in petrographic and geochemical difference of the core and cortex of the saddle dolomites. The cores precipitated from the formation water mixed by deep brines at the early stage of fault activity, and the cortexes precipitated from the deep fluid with higher temperatures through the Middle Cambrian later. In summary, the formation of the saddle dolomites implies a hydrothermal fluid event related to fault activity, which also resulted in high porosity in Upper Cambrian carbonate in western Tarim Basin. (C) 2009 Elsevier Ltd. All rights reserved.
WOS关键词CANADA SEDIMENTARY BASIN ; SILURIAN SAYABEC FORMATION ; HYDROTHERMAL DOLOMITES ; MONTEREY FORMATION ; FORMATION MIOCENE ; NORTHERN GASPE ; DOLOMITIZATION ; RESERVOIRS ; EVOLUTION ; RECRYSTALLIZATION
WOS研究方向Geology
语种英语
WOS记录号WOS:000270330300008
出版者ELSEVIER SCI LTD
资助机构China's 973 National Key Research and Development Program(2005CB422103) ; China's 973 National Key Research and Development Program(2005CB422103) ; National Natural Science Foundation of China(40602014 ; National Natural Science Foundation of China(40602014 ; 40872086) ; 40872086) ; China's 973 National Key Research and Development Program(2005CB422103) ; China's 973 National Key Research and Development Program(2005CB422103) ; National Natural Science Foundation of China(40602014 ; National Natural Science Foundation of China(40602014 ; 40872086) ; 40872086) ; China's 973 National Key Research and Development Program(2005CB422103) ; China's 973 National Key Research and Development Program(2005CB422103) ; National Natural Science Foundation of China(40602014 ; National Natural Science Foundation of China(40602014 ; 40872086) ; 40872086) ; China's 973 National Key Research and Development Program(2005CB422103) ; China's 973 National Key Research and Development Program(2005CB422103) ; National Natural Science Foundation of China(40602014 ; National Natural Science Foundation of China(40602014 ; 40872086) ; 40872086)
源URL[http://ir.iggcas.ac.cn/handle/132A11/71462]  
专题中国科学院地质与地球物理研究所
通讯作者Zhang, Juntao
作者单位1.Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing 210093, Peoples R China
2.Res Inst Explorat & Dev, Northwest Branch, SINOPEC, Urumqi 830011, Peoples R China
3.China Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Juntao,Hu, Wenxuan,Qian, Yixiong,et al. Formation of saddle dolomites in Upper Cambrian carbonates, western Tarim Basin (northwest China): Implications for fault-related fluid flow[J]. MARINE AND PETROLEUM GEOLOGY,2009,26(8):1428-1440.
APA Zhang, Juntao.,Hu, Wenxuan.,Qian, Yixiong.,Wang, Xiaolin.,Cao, Jian.,...&Xie, Xiaomin.(2009).Formation of saddle dolomites in Upper Cambrian carbonates, western Tarim Basin (northwest China): Implications for fault-related fluid flow.MARINE AND PETROLEUM GEOLOGY,26(8),1428-1440.
MLA Zhang, Juntao,et al."Formation of saddle dolomites in Upper Cambrian carbonates, western Tarim Basin (northwest China): Implications for fault-related fluid flow".MARINE AND PETROLEUM GEOLOGY 26.8(2009):1428-1440.

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来源：地质与地球物理研究所

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