| 片钠铝石的成因及其对CO2天然气运聚的指示意义 |
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| 引用本文： | 高玉巧,刘立,曲希玉.片钠铝石的成因及其对CO2天然气运聚的指示意义[J].地球科学进展,2005,20(10):1083-1088. |
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| 作者姓名： | 高玉巧 刘立 曲希玉 |
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| 作者单位： | 吉林大学地球科学学院,吉林,长春,130061 |
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| 摘 要： | 片钠铝石作为胶结物、自生矿物或脉体，不仅分布在海相白云岩、油页岩中，而且还广泛分布在陆源碎屑岩及煤系地层中。大量的实例及人工合成片钠铝石实验表明，片钠铝石的形成需要碳酸溶液或过量的CO2气，片钠铝石的分布往往与CO2天然气藏相伴生。CO2气的来源决定了片钠铝石具有无机和有机两大成因类型，其中，无机成因包括岩浆成因和碳酸盐热解成因。然而，不论源于有机成因CO2气还是无机成因CO2气，片钠铝石均可作为富CO2流体运移或聚集的“示踪矿物”，地质过程中片钠铝石的出现或富集表明该区曾存在大量CO2运移或聚集。
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| 关 键 词： | 片钠铝石成因 CO2天然气运聚 |
| 文章编号： | 1001-8166（2005）10-1083-06 |
| 收稿时间： | 2004-12-14 |
| 修稿时间： | 2005-06-20 |
GEMESIS OF DAWSONITE AND ITS INDICATION SIGNIFICANCE OF CO2 MIGRATION AND ACCUMULATION |
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| GAO Yu-qiao,LIU Li,QU Xi-yu.GEMESIS OF DAWSONITE AND ITS INDICATION SIGNIFICANCE OF CO2 MIGRATION AND ACCUMULATION[J].Advance in Earth Sciences,2005,20(10):1083-1088. |
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| Authors: | GAO Yu-qiao LIU Li QU Xi-yu |
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| Institution: | College of Earth Sciences, Jilin University, Changchun 130061,China |
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| Abstract: | As cement, authigenic mineral or vein, dawsonite is found not only in marine dolomite and oil shale, but also in terrigenous fragmentary rock and coal measures. Abundant instances and experimentations on synthetic dawsonite indicate that carbonic acid or excess carbon dioxide is necessary for generating dawsonite. Therefore, occurrence of dawsonite is always associated with carbon dioxide gas reservoir. Two genetic types of dawsonite, namely inorganic and organic are divided in response to origin of carbon dioxide. Inorganic genesis includes magmatic origin and carbonate decomposition origin. However, dawsonite can be acted as trace mineral suggesting migration or accumulation of fluids with abundant carbon dioxide to whatever origin it belongs. In geological background, occurrence or enrichment of dawsonite indicates that migration or accumulation of carbon dioxide with large scale has happened. |
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| Keywords: | Genesis of dawsonite Carbon dioxide gas Indication significance |
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