Fluid Origin of Cave-Filling Giant Crystalline Calcites in the Early Paleozoic in Tahe Oilfield, Tarim Basin and the Model of the Fluid Action

• 责任者：Li Kaikai (Key Laboratory of Intergrative Researches on Geophysics for Petroleum ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Cai Chunfang
• 刊名：Chinese Journal of Geology
• 出版年：2010
• 卷期：45(2)
• 关键词：方解石 ; calcite ; 岩溶充填 ; karst filling ; 新疆 ; Xinjiang
• 页码：p.595-605
• 图表：5 illus., 3 tables, 33 refs.
• 分类号：0803
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

Trace elements, δ¹³C, δ¹⁸O and ⁸⁷Sr/⁸⁶Sr of cave-filling giant crystalline calcites and fluid inclusion homogenization temperatures (HTs) were analyzed from each formation in the Eopalaeozoic carbonate reservoirs. The result shows that the giant crystalline calcite samples in different wells may have various fluid origins.  The characters of ⁸⁷Sr/⁸⁶Sr-rich and low δ¹⁸O values suggest that this low temperature fluid should be derived from meteoric water.