云南耿马县老厂铅锌矿特征及找矿标志

THE FEATURE AND PROSPECTING CRITERIA OF LAOCHANG PB-ZN DEPOSIT IN GENGMA,YUNNAN

耿马县老厂铅锌矿矿体呈脉状、透镜状、局部为囊状产于晚古生界孟定岩群的浅变质岩系层间构造破碎带中,矿体主要受构造破碎带控制。围岩蚀变主要为硅化、黄铁矿化、褐铁矿化、绢云母化、矽卡岩化,矿床成因属热液型脉状铅锌矿床。矿体露头及物、化探异常高值区是主要的找矿标志。

The orebody of Laochang Pb-Zn deposit in Gengma is Veined,lenticular,locally chambered in the interbed structural fracture zone of Later Paleozoic Mengding rock group epirock.The ore body is controlled mainly by the structural fracture zone.The alteration of wall rock sre mainly silicification,pyritization,limonitization,sericitization,skarnization.It belongs to the hydrothermal veined Pb-Zn deposit in genesis.The main prospecting criteria are the outcrop,high value area of geophysical-geochemical exploration anomaly.