| 剪切带流体与蚀变和金矿成矿作用 |
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| 引用本文： | 刘忠明.剪切带流体与蚀变和金矿成矿作用[J].地学前缘,2001,8(4):271-275. |
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| 作者姓名： | 刘忠明 |
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| 作者单位： | 湖北省地质科学研究所 |
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| 基金项目： | 国家自然科学基金资助项目 ( 495 72 14 6) |
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| 摘 要： | 剪切带中流体与金矿中交代蚀变作用密切相关。剪切带中往往发育不同期次、不同类型的蚀变及交代蚀变岩 ,第二、三期交代蚀变岩的形成与金矿化关系密切。在含金断裂蚀变带中 ,由于剪切带流体的强烈交代作用 ,交代蚀变岩成为金矿的重要矿石类型。剪切带中的流体往往携带大量成矿物质而成为成矿流体 ,并在金矿形成过程中起着重要。在剪切带中 ,由于压力迅速降低 ,经常导致成矿流体发生沸腾作用 ,从而导致金矿的形成。成矿主要与脆性变形有关 ,韧性剪切变形向脆性剪切变形转变至关重要。从韧性剪切带向脆性剪切带转变的过程中 ,Au ,Ag ,Cu ,Pb发生大规模的活化迁移 ,并在较窄的脆性断裂中明显富集 ,形成矿体或矿化体。岩浆流体是剪切带成矿流体中最为重要的一种流体 ,许多金矿的成矿物质来源于岩浆流体
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| 关 键 词： | 剪切带 流体 蚀变 金矿 |
| 文章编号： | 1005-2321(2001)04-0271-05 |
| 修稿时间： | 2001年4月30日 |
RELATIONSHIP OF ALTERATION,GOLD MINERALIZATION BETWEEN FLUID IN SHEAR ZONES |
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| LIU Zhong\|ming.RELATIONSHIP OF ALTERATION,GOLD MINERALIZATION BETWEEN FLUID IN SHEAR ZONES[J].Earth Science Frontiers,2001,8(4):271-275. |
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| Authors: | LIU Zhong\|ming |
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| Abstract: | Fluid in shear zones is closely related to alteration in gold deposits. There are often metasomatism\|metasomatite of various type\|stages in shear zones, and Au mineralization was closely related to the metasomatite at the second\|third stage. In fault\|alteration belts which bear gold, because of violent alteration of fluid in shear zones, metasomatism is important ore type in gold deposit. The fluids of shear zones often become ore\|forming fluids because of carrying a lot of ore materials. Ore fluids in shear zones play a very important action during gold deposit formation. In shear zones, sudden pressure lowering often leads to ore fluid boiling, and then gold sedimentation occurs. It is very important for the change from ductile to brittle shear strains. During the change, the elements Au, Ag, Cu, Pb are activated and migrate on great\|scale, and are obviously enriched in narrow brittle faults becoming orebodies or mineralized bodies. Magmatic fluid is the most important ore fluid in shear zones, providing ore\|forming materials for most gold deposits. |
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| Keywords: | shear zone fluid alteration gold deposit |
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