广西凌云县红卜楼金矿床地质特征及找矿标志

摘要

红卜楼金矿床属于微细浸染型金矿床，位于凌云县弄广—沙里环台大断裂带上。矿区构造相对简单，出露地层主要为碳酸盐岩和浊流沉积碎屑岩。对矿床地质特征、矿床成因进行了分析，并归纳总结了找矿标志。研究表明，古岩溶剥蚀面上的层间断裂带为成矿有利部位；中三叠统百逢组第二段的浊流沉积碎屑岩是金矿床的控矿围岩及矿源层；硅化、黄（褐）铁矿化、高岭土化等围岩蚀变较好的地段金品位相对较好；土壤地球化学测量显示有Au、Ag、As、Sb综合异常的地段往往能找到金矿（化）体。应加大对矿床中深部的地质找矿工作，有望进一步增加储量。%Hongbulou Gold Deposit belongs to a micro-fine disseminated gold deposit,located on Nongguang-Shali great fault in Lingyun County.The structure of the deposit is relatively simple,the outcropping strata are mainly carbonatite and clastic sedimentary turbidite.Analysis of geological characteristics of the deposit and deposit genesis is made and the prospecting indicators are summarized.The study shows that the interlayer fracture zone in denudation surface of fossil karst is the favorable mineralization point;the main ore-controlling surrounding rocks and ore source bed of the gold deposit is the clastic sedimentary turbidite of Member 2 of Baifeng Formation of middle Triassic;sec-tions with favorable silicification,pyritization( ferritization) and kaolinization are rich in gold;soil geochemical survey indicates sections with comprehensive anomaly of Au,Ag,As and Sb are favorable for gold( body) mineralization.Me-dium deep exploration in the deposit should be intensified which will serve reserve increase.