湘西北杨家寨层控型全隐伏铅锌矿床地质特征及找矿前景

Geological Characteristics and Prospecting Prospects of Layer-Controlled Fully Concealed Lead-Zinc Deposits in Yangjiazhai, Northwestern Hunan

湘西北地区龙山–凤凰铅锌成矿带是国内重要的铅锌资源基地。杨家寨铅锌矿床则是该成矿带4大铅锌矿田之一的花垣矿田所属矿床,亦是该成矿带近期新发现、探明的大型铅锌矿床。作者作为该矿床勘查工作的全程参与者,试图从研究和总结该矿床的区域成矿地质背景、矿区地质特征、矿体特征、矿石组构特征、含矿岩层藻灰岩特征及其与铅锌矿化的关系等方面入手,探究此类矿床的成因类型,并就如何取得该类层控型全隐伏矿床的直接的、高效的地质找矿方法进行探讨。利用在勘查杨家寨铅锌矿床过程中所获取的从直接或间接的找矿依据,深入地分析了矿区外围铅锌矿的找矿前景,研究认为本地区铅锌矿的找矿潜力是巨大的。

The Yangjiazhai lead-zinc deposit in western Hunan is one of the recently discovered large-scale lead-zinc deposits. In this article, the metallogenic geological background, mining strata, mining structure, ore body characteristics, ore structure characteristics of algal limestone in ore-bearing strata, the relationship between algal limestone and lead-zinc mineralization are introduced in detail. The geological prospecting method for such layer controlled full concealed deposits is discussed, from the direct basis and indirect basis, the prospecting prospects of the mining area periphery are analyzed, indicating great prospecting potential.