黔西南戈塘金矿成因再认识  

Genesis of the Getang gold deposit in the southwest Guizhou

作　　者：毛彬吉 冉瑞德 况顺达 吴治君[3] 赵明峰[3] 王小洪 MAO Binji;RAN Ruide;KUANG Shunda;WU Zhijun;ZHAO Mingfeng;WANG Xiaohong(Guizhou University,Guiyang 550025,China;Southwest Energy Group Guizhou,Guiyang 550004,China;Guizhou provincial land mining bureau 117 geological team,Guiyang 550018,China)

机构地区：[1]贵州大学资源与环境工程学院,贵阳550025 [2]西南能矿集团股份有限公司,贵阳550004 [3]贵州省地矿局117地质大队,贵阳550018

出　　处：《地质找矿论丛》2018年第2期168-175,共8页Contributions to Geology and Mineral Resources Research

基　　金：西南能矿集团股份有限公司科研项目"黔西南卡林型金矿成矿规律与矿床模型研究"资助

摘　　要：文章通过对戈塘金矿硅质角砾岩的地质特征、地球化学特征综合分析,认为矿区的角砾硅化灰岩、硅化黏土岩等蚀变地质体为热液成因,其中硅质来源可分为成岩期与成矿期:成岩期硅质来自热泉型生物沉积;成矿期硅质来自成矿流体。成矿流体是来源于深部流体与天水、地层建造水的混合作用形成的混合流体。根据矿石结构构造特征及含金蚀变地质体产状特征,结合在戈塘地区茅口组底部及以下地层中新近发现呈筒状产出的含金蚀变角砾岩,认为戈塘金矿矿区含金角砾岩具有隐爆角砾岩的特征,得出戈塘金矿成因类型可能为隐爆角砾岩型金矿的新认识。此认识可供黔西南金矿成矿理论研究、探讨新的找矿方向和成矿预测提供参考。Based on the comprehensive analysis of geological and geochemical characteristics of siliceous breccia in Getang Au deposit it is considered that the silicified brecciated limestone and the silicified clay rock etc.in mining area are genetically the hydrothermally altered geological masses.The siliceous material was derived during the rock-forming and ore-forming stages.The siliceous material of the rock-forming stage comes from bio-sediments of hot spring water and that of the ore-forming stage from ore fluid.The ore fluid is derived from mixture of deep fluid,meteoric water and water trapped in formations.According to the ore structure and texture and the occurrence of the gold-bearing altered geological bodies and the recently discovered pipe-like gold-bearing altered breccia at bottom of Maokou formation and that in strata beneath the formation in Getang area it is considered that Getang Au deposit is genetically a crypto-explosion pipe type gold deposit.This is a new idea that will provide new metallogenic theory and reference for gold ore prospecting and prediction in the southwest Guizhou province.

关 键 词：戈塘金矿 硅化角砾岩 地球化学特征 矿床成因 黔西南地区 

分 类 号：P618.51[天文地球—矿床学] P611.1[天文地球—地质学]