Study on the Strontium Isotopic Composition of Large Devonian Barite Deposits from Zhenning, Guizhou
详细信息
- 责任者：Gao Junbo (College of Resources and Environmental Engineering ; Guizhou University ; Guiyang 550025 ; China) ; Yang Ruidong
- 刊名：Geochimica
- 出版年：2013
- 卷期：42(4)
- 关键词：重晶石矿床 ; barite deposit ; 锶同位素 ; strontium isotopes ; 贵州 ; Guizhou Province
- 页码：p.385-392
- 图表：illus., 2 tables, 35 refs.
- 分类号：1002
- issnNo：ISSN0379-1726
- isbnNo：CN44-1398/P
摘要
Large Devonian barite deposits were controlled by a fault depression of Shuicheng-Ziyun-Nandan during the late Palaeozoic.Determined 87Sr/86Sr compositions of 11 samples with different ore textures and types from the deposits vary from 0.70863-0.70898,with an average value of 0.70877,higher than the average value(0.70829) of the coeval seawater,but significantly lower than the 87Sr/86Sr ratios of the Earth’s crust,showing a mixed source of ore-forming fluids.Combined research on location of paleogeography,forming environmental and geochemistry of the barite deposits,the hydrothermal fluid of the barite deposits might be mixed by the coeval seawater and deep hydrothermal water.This study of strontium isotopic composition could provide new evidences for the submarine hydrothermal exhalative genesis of Zhenning large barite deposits.
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