A Study of Methane Inclusions of the Danzhai Mercury Ore Field in Guizhou Province and Its Geological Significance
详细信息
- 责任者：Li Baohua (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Li Wenxia
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(1)
- 关键词：汞矿 ; mercury ores ; 流体包裹体 ; fluid inclusions ; 贵州 ; Guizhou Province
- 页码：p.55-63
- 图表：illus., 3 tables, 19 refs.
- 分类号：1001
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Based on the microscopic observation and inclusion homogenization temperature determination,a number of high-density methane inclusions are discovered in the Danzhai mercury field.Their homogenization temperatures vary between-92.7 and-118.2 ℃.The densities range from 0.278 to 0.350 g/cm3.The homogeneous temperatures of aqueous inclusion associated with methane inclusions are mainly 170~230 ℃.Using homogenization temperatures of aqueous inclusions as trap temperature of methane inclusions,it is calculated that trap pressure of methane inclusion varies from 106.8 to 233.3 MPa.The results indicate that methane inclusions were trapped in an overpressured environment.The methane inclusions provide important information for the study of pressure conditions of oil thermal cracking gas reservoir and for the discussion on the relationship between mercury mineralization and accumulation of oil and gas.
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