安徽南陵桂山地区铜铅锌矿地质特征及成因机理探讨

A discussion on the geological characteristics and genetic mechanism of the Cu-Pb-Zn deposit in the Guishan area, Nanling County, Anhui Province

安徽省南陵县桂山铜铅锌矿,位于铜陵矿集区东部边缘沙滩角矿田,南与姚家岭特大型锌金多金属矿毗邻。矿体主要赋存于二叠系-三叠系碳酸盐岩与青山岩体接触带附近及层间裂隙中,部分分布于火山凝灰岩中。矿体受火山碎屑岩盖层、戴公山背斜南东翼、青山岩体及青山推覆构造共同作用控制,呈脉状、似层状、透镜体状。本文综合分析矿区和矿体地质特征,初步探讨了该矿床的成因机制。

The Guishan Cu-Pb-Zn deposit in Nanling County, Anhui Province is located in the Shatanjiao ore field on the eastern edge of the Tongling ore cluster area, and adjacent to the Yaojialing super-large zinc-gold polymetallic ore deposit in the south. Most of the ore bodies occur near the contact zone between the Permian-Triassic carbonate rocks and the Qingshan pluton, and in interlayer fissures, and some of them are hosted in the volcanic tuff. The ore bodies are veined, stratified and lenticular, and are jointly controlled by the pyroclastic rock cover, the southeast flank of the Daigongshan anticline, the Qingshan pluton and the Qingshan nappe structure. This paper comprehensively analyzes the geological characteristics of the ore deposit area and ore bodies, and preliminarily discusses the genetic mechanism of the deposit.