奈曼旗大束龙沟金矿地质特征及找矿标志

Geological features and prospecting criteria of Dashulonggou gold deposit in Naiman Banner

大束龙沟金矿位于阴山隆起东部,金厂沟梁—大黑山金、铁成矿带上。本文在分析大束龙沟金矿地质特征的基础上,对矿床成因进行了探讨,总结了找矿标志。认为成矿物质来源为中太古界乌拉山岩群,金、银元素在华力西晚期岩浆作用下富集,沿华力西晚期、燕山期构造部位沉淀成矿;成因类型为破碎蚀变岩型;断层破碎带、含硫化物石英脉、化探异常为找矿标志。

Dashulonggou gold deposit is located in the Jinchanggouliang—Daheishan gold and iron metallogenic belt in the east of Yinshan uplift.Based on analysis of geological features of Dashulonggou gold deposit,the genesis of the deposit was discussed and the prospecting criteria were summarized in this paper.It was considered that the ore-forming materials were derived from the Wulashan rock group of Mesoarchean Era.The gold and silver elements were enriched by the late-Varician magmatism and precipitated along the structure of late-Varician and Yanshanian.The genetic type was broken-altered-rock-type.Fault fracture zone,sulfide-bearing quartz vein,and geochemical anomaly were the prospecting indicators.