黔西南廖基金矿地质特征及金的赋存状态研究  

Study on geological characteristics and occurrence state of Liaoji gold mine in Southwestern Guizhou

作　　者：李俊海[1] 吴秀坤[1] 张丞[1] 刘万龙 LI Junhai;WU Xiukun;ZHANG Cheng;LIU Wanlong

机构地区：[1]贵州省地质矿产勘查开发局一0五地质大队,贵州贵阳550018 [2]贵州一零五地矿工程有限公司,贵州贵阳550018

出　　处：《中国矿山工程》2021年第4期29-33,共5页China Mine Engineering

基　　金：贵州省科技计划项目(黔科合平台人才[2018]5765);贵州省地质矿产勘查开发局地质科研项目(黔地矿科合[2016]12号)资助。

摘　　要：廖基金矿位于滇黔桂"金三角"北部晴隆-罗平成矿带之碧痕营穹窿北东翼,根据黔西南地区金矿找矿建立的以构造蚀变体(SBT)为核心的成矿模式,通过钻探工程验证,发现了赋存于构造蚀变体(SBT)中的金矿体,初步探获金资源量为小型矿床规模,容矿岩石主要为角砾状凝灰岩、角砾状凝灰质玄武岩、角砾状灰岩及角砾状黏土岩,与金矿成矿关系密切的热液蚀变主要有褐铁矿化、硅化、黄铁矿化,金主要以包裹金形式存在于硅酸盐矿物和硫化物中,其平均占有率分别为37.52%、35.90%,强风化至中风化矿石中的金主要以游离金形式存在。Liaoji gold mine is located in the northeast wing of Bihenying dome in the Qinglong-Luoping mineralization belt in the northern Golden Triangle of Yunnan,Guizhou and Guangxi. According to the mineralization model with structural alteration variant( SBT) as the core established by gold prospecting in southwestern Guizhou,the gold orebodies occurring in SBT have been found through drilling engineering verification. The gold resources preliminarily discovered are in small deposits. The host rocks are mainly breccia tuff,breccia tuffaceous basalt,breccia limestone and breccia claystone. The hydrothermal alteration closely related to gold mineralization mainly includes limonitization,silicification and pyritization. Gold mainly exists in silicate minerals and sulfides in the form of encapsulated gold,with an average share of 37. 52% and 35. 90% respectively. The gold in strongly weathered to moderately weathered ores mainly exists in the form of free gold.

关 键 词：地质特征 赋存状态 金矿 黔西南 

分 类 号：TD163[矿业工程—矿山地质测量]