云南元阳大坪金矿床成因及找矿方向  

Metallogenesis and Prospecting Direction of the Daping Gold Deposit in Yuanyang County,Yunnan Province

作　　者：李兴俭[1] 张达[1] 张垚垚[1] 狄永军[1] 刘军 卜星辰 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]元阳县华西黄金有限公司,云南红河662406

出　　处：《金属矿山》2016年第3期113-118,共6页Metal Mine

摘　　要：大坪金矿床为哀牢山金矿带的典型矿床之一,被视为产于碰撞造山环境下的金多金属矿床。为进一步查明矿床成因类型,结合区域成矿背景,以云南省元阳县大坪金矿床地质勘查成果为依据,深入分析了典型矿床的地质特征、矿物组合特征、围岩蚀变特征,划分了成矿期次,并对成矿物质基础研究成果和控矿构造特征进行了总结,结果表明:1矿床主要受左行走滑剪切作用控制,矿体主要赋存于张扭性-压扭性空间过渡部位。2矿床成矿物质来源多样,受多期次构造成矿作用、多成因热流体综合作用叠加改造,属中温热液脉型金多金属矿床。在上述研究成果的基础上,对区内找矿标志及找矿方向进行了讨论,认为区内找矿工作应在富碱斑岩发育和构造活动叠加的地区进行,重点找矿部位为煌斑岩和花岗斑岩出露地带,另外应注意多金属硫化物的富集部位。上述研究成果对于矿区深部找矿预测有一定的参考价值。Daping gold deposit is one of the typical deposits in the Ailaoshan metallogenic belt,it is regarded as the veintype gold poly-metallic sulfide deposit that is commonly developed in close association with the product of collision orogenic environment. In order to analyze the deposit genesis types of the Daping gold deposit in Yuanyang county,Yuannan province,based on the regional metallogenic background and the geological exploration results of the Daping gold deposit in Yuanyang county,Yunnan province,the typical deposit geological characteristics,mineral assemblage characteristics and wall rock alteration characteristics are discussed in depth,the metallogenic period is divided,besides that,the basic research results of the oreforming materials and ore-controlling tectonic characteristics are also analyzed in detail. The results show that： 1the gold deposit is controlled by sinistral strike-slipping shear,the main ore-bodies are developed in the transition part of tense-compression shearing space. 2the metallogenic material source is varied,they are affected by multi-phase tectonic mineralization and superposition reconstructed by poly-genetic thermal fluid combination,so,the Daping gold deposit in Yuanyang county,Yunnan province is a vein-type poly-mental deposit with middle temperature. Based on the above research results,the prospecting indicators and prospecting direction in the mining area are discussed,the result show that the prospecting work in the mining area should be conducted in the area where the alkali-rich porphyry is developed and tectonic activities superposition,the key prospecting portion is the area where the lamprophyre and granite porphyry are exposed,in addition,the poly-metallic sulfide enrichment places should also be paid attention. The above research results can provide reference for the further deep prospecting and prediction in the mining area.

关 键 词：矿体特征 矿床成因 围岩蚀变 成矿期次 找矿标志 找矿方向 深部找矿 

分 类 号：P612[天文地球—矿床学]