| 甘肃小西弓金矿地质特征及成因探讨 |
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| 引用本文： | 郭晓东,金宝义,徐燕夫,陈孝强,李强之.甘肃小西弓金矿地质特征及成因探讨[J].黄金地质,2002,8(3):33-37. |
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| 作者姓名： | 郭晓东 金宝义 徐燕夫 陈孝强 李强之 |
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| 作者单位： | 武警黄金地质研究所,河北,廊坊,065000 |
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| 摘 要： | 根据小西弓金矿矿体产出特点与规律，认为金矿化受韧性剪切带，老地层，后期脆性断裂等多重因素控制，前长城系西尖山群第四岩组的二云片岩，绢云石英片岩是成矿的主要物质来源和直接的赋矿围岩，华力西期的钾长花岗岩和二长花岗岩是成矿的热动力来源，区域性杨圈沟-西尖山-华窑山大断裂和小西弓-乌龙泉韧性剪切带具有切割深，活动时间长的特点，是成矿的导矿构造，发育于小西弓-乌龙泉韧性剪切带之上的3条次级韧性剪切带和叠加其上的脆性断裂提供了流体运移的通道和容矿空间，矿床属与韧性剪切带有关的中低温热液多因复成蚀变岩型金矿。
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| 关 键 词： | 金矿床 韧性剪切带 地质特征 成因 甘肃 成矿作用 蚀变 |
| 文章编号： | 1006-558X(2002)03-0033-05 |
| 修稿时间： | 2001年12月21 |
Geological features and genesis of the Xiaoxigong gold deposit, Gansu |
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| GUO Xiao-dong,JIN Bao-yi,XU Yan-fu,CHEN Xiao-qiang,LI Qiang-zhi.Geological features and genesis of the Xiaoxigong gold deposit, Gansu[J].Gold Geology,2002,8(3):33-37. |
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| Authors: | GUO Xiao-dong JIN Bao-yi XU Yan-fu CHEN Xiao-qiang LI Qiang-zhi |
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| Abstract: | According to the occurrence characteristics and regularity of gold bodies, it's considered that the Xiaoxigong gold deposit is controlled by the ductile shear zone, old strata and succeeding brittle fault, etc. Two-mica schists and sericite-quartz schists in the 4th rock group of the Xijianshan series of Pre-Great-wallnian are the main source and direct host rock of the mineralization, and moyites and adamellites of Variscan are the thermodynamic source of the mineralization. The major fault of the regional Yangquangou-Xijianshan-Huayaoshan and the ductile shear zone of the Xiaoxigong-Wulongquan are all deep cutted and have long period of activity, they belong to structure as passageway for ore fluid of the mineralization. The 3 secondary ductile shear zones which developed in the Xiaoxigong-Wulongquan ductile shear zone and the ductile fault which superimposed on it provides the migratory pathway and host space for mineralizing fluid. The Xiaoxigong gold deposit is meso-epithermal multiple genesis alteration compound type that related to ductile shear zone. |
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| Keywords: | gold deposit ductile shear zone geological feature genesis Gansu |
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