| 二氧化碳气成藏的断裂控制作用 |
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| 作者姓名： | 李振生 张文俊 刘德良 吴小齐 |
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| 作者单位： | 1. 合肥工业大学资源与环境工程学院,安徽合肥,230009
2. 中国科学技术大学地球与空间科学学院,安徽,合肥,230026 |
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| 基金项目： | 国家自然科学基金(40702021,40830426,40972134) |
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| 摘 要： | 对二氧化碳(CO_2)气成藏来说,各种级别不同性能断裂的存在是必不可少的条件,按其在成藏过程中功能的不同可以分为成气、疏气、储气和封气四种类型。断裂对幔源-岩浆成因CO_2气最重要的作用是对幔源气的运移疏导作用。幔源CO存在于地下深处,其释放的途径有两种:一是没有岩浆喷发和侵入的情况下,沿深断裂直接释放;二是在岩浆喷溢、侵入过程中冷却时释放的幔源气,断裂作为岩浆喷溢、侵入的通道。岩浆活动为幔源型CO_2成藏提供了主力气源,深大断裂为CO_2提供了运聚的通道和赋存的空间。断裂对变质成因CO_2气的最重要的作用是对CO_2气的生成和疏导作用。在动力变质作用中,断裂活动的构造热使碳酸盐岩分解释放CO_2,压扭性断裂带与张启性断裂的交汇带即成为变质成因CO_2的生成与排放中心;在接触变质作用,断裂不仅作为岩浆或高温热液的通道使得围岩变质释放CO_2,而且也是变质成因CO_2运移释放的通道。
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| 关 键 词： | 二氧化碳 断裂 中国东部 气藏 |
Control Actions of Faults to Form Carbon Dioxide Gas Accumulations |
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| Authors: | LI Zhen-Sheng ZHANG Wen-Jun LIU De-Liang WU Xiao-Qi |
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| Institution: | LI Zhen-Sheng~1,ZHANG Wen-Jun~1,LIU De-Liang~2,WU Xiao-Qi~2 (1 School of resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China,2 School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China) |
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| Abstract: | various grade and mechanical property of faults is absolutely necessary to form Accumulations of large volumes of carbon dioxide (CO_2),which can be divided into four kinds:creating,transmitting,gathering and sealing faults by their control action to CO_2 gas.The transmitting action of faults is the most important to mantle-magma-derived CO_2.There are two kind of mode to release mantle-derived CO_2:first,mantle-derived gas is immediately released along deep faults in the condition of no eruption/intrusion ... |
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| Keywords: | carbon dioxidefaults eastern China gas accumulations |
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