Geological Characteristics and Genetic of Cap Carbonates of Doushantuo Formation, Tongren Region
详细信息
- 责任者：He Jinxian (Key Laboratory of Petroleum Resoures Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Zhang Xiaoli
- 刊名：Contributions to Geology and Mineral Resources Research
- 出版年：2013
- 卷期：28(3)
- 关键词：碳酸盐岩 ; carbonate rocks ; 贵州 ; Guizhou Province
- 页码：p.412-418
- 图表：6 illus., 2 tables, 23 refs.
- 分类号：0803
- issnNo：ISSN1001-1412
- isbnNo：CN12-1131/P
摘要
Field observation and microscopic study on thin sections reveal that special sedimentary structures,such as miarolitic structure,tepee-like structure,layer jointed structure and convolute structure,barites and pyrite are widely developed and δ(13C)values were generally significant negative(the average value was-4.73×10-3 and-4.52×10-3 in each study section).The"methane seep"hypothesis can be used to give a good explanation to part of geological characteristics and geochemical characteristics of the cap carbonates so the conclusion is reached that the cap carbonates is formed by"methane seep".
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