江西大石笏金矿床地质特征及矿化富集规律

来源期刊：有色金属科学与工程2012年第2期

论文作者：徐国才

文章页码：80 - 86

关键词：卡林型金矿床；地质特征；矿化富集规律；江西大石笏

Key words：Carlin-type gold deposit; geological features; mineralization and enrichment regularity; Dashihu

摘    要：江西大石笏金矿床是一个小型卡林型(微细浸染型)金矿床，通过对矿床地质特征的分析，指出矿床严格受层间破碎带或断裂破碎带控制，呈层状、似层状、透镜状产出，且矿体上部品位好，矿化强，下部弱；通过对矿化富集规律的研究，认为两个大地构造单元过渡地带是金矿成矿的有利环境，区域性的晚古生代一中生代坳陷区、古裂谷环境、坳陷区内的次级坳陷为金矿化富集的有利环境，一般性主干断裂或几组一般性主干断裂交汇处为控制矿化带或矿床的有利构造，与金矿化富集有利的层位主要是下石炭统华山岭组、下二叠统茅口组，为今后在该区找矿指明了方向，对其它地区找寻微细粒浸染型金矿床具有参考价值。

Abstract: By analyzing the deposit geological characteristics of the small-scaled Carlin-type (micro-disseminated) Dasihu Gold deposit, this paper points out that the gold deposit is strictly controlled by inter-laruinar fracture zone or f'ault fracture zone, showing layered, simulating layered or lenticular output. The upper part of the ore body has good grade and strong mineralization. The mineralization enrichment regularity reveals that two tectonic units in their transition zone is favorable to gold mineralization. The regional late Paleozoic -Mesozoic down-warping, ancient rift environment, secondary depression is favorable for gold enrichment. The general main fault or the confluences of several general main faults are favorable mineralization structures for mineralized zone or deposit. Gold mineralization enrichment favorable horizons are mainly in the lower Carboniferous Huashanlin formation and Maokou Formation Permian. It is of great significance to prospect Carlin-type gold deposit in other areas.