| 甲烷泄露背景下碳酸盐岩的形成及其地球化学特征 |
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| 引用本文： | 密文天,李德亮.甲烷泄露背景下碳酸盐岩的形成及其地球化学特征[J].安徽农业科学,2010,38(11):5750-5751,5812. |
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| 作者姓名： | 密文天 李德亮 |
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| 作者单位： | |
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| 摘 要： | 甲烷泄露背景下形成的碳酸盐岩,特征上明显区别于正常海相碳酸盐岩。冷泉碳酸盐岩、震旦纪的盖帽碳酸盐岩均被认为是甲烷泄露背景下的产物,其碳同位素值都出现强烈的负漂移。研究认为,成岩中的碳源于天然气水合物分解产生的甲烷。冷泉碳酸盐岩与盖帽碳酸盐岩在结构、构造及矿物组分上很相似。对甲烷泄露背景下的碳酸盐岩的外观构造、岩石矿物特征、地球化学特征进行了分析,并阐述了这类碳酸盐岩的特征与其形成背景、过程、条件之间的关系。
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| 关 键 词： | 甲烷泄露 冷泉碳酸盐岩 盖帽白云岩 地球化学 |
Formation of Carbonatite in the Context of Methane Leaking and Its Geochemistry Characters |
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| Institution: | MI Wen-tian et al (Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu,Sichuan 610059) |
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| Abstract: | The characteristics of carbonatite formed in the context of methane leaking were significantly different from normal carbonatite.Cold seep carbonate and sinian cap carbonate were considered to be the products in the context of methane leaking,and they had the strongly negative δ13C excursions.Studying on this carbonatite,we found that diagenesis of carbon came from methane,which was resolved by gas hydrate.And they had similar structure,construction and mineral composition.The carbonatite’ s surface construction,rock constituents and the feature of geochemistry were discussed,and the relationship between the characteristics of these carbonate rocks and the formation of the background,process,conditions were expounded. |
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| Keywords: | Methane leaking Cold seep carbonate Cap dolostone Geochemistry |
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