广东望石银铅多金属矿地质成因特征及找矿前景

On geological genesis characteristics and prospecting potential of the Wangshi Ag-Pb polymetallic deposit,Guangdong Province

广东望石银铅多金属矿属热液充填交代型银铅矿床。通过对该矿床地质特征进行研究,结合前人的研究成果,初步探讨矿床的成矿模式。研究表明,由向斜以及形成于加里东期的望石断裂破碎带构成的控矿构造是该矿的必要成矿要素;矿区的银铅矿体主要赋存于海西期花岗闪长岩中,走向上存在其他矿体的可能性较大,硅化、绿泥石化是重要的蚀变标志,褐铁矿(铁帽)、构造角砾岩是重要的找矿标志。依据矿区矿体的埋深推测可能存在系列矿床,具有一定的找矿潜力。

With reference to previous studies,this paper studies the geological characteristics of the Wangshi Ag-Pb polymetallic deposit of Guangdong Province,a hydrothermal filling metasomatic deposit,and explores its metallogenic model. The result shows that its ore-forming structure consisting of the syncline and the Caledonian Wangshi fracture zone is a key factor in the mineralization of this deposit. The（ silver） lead ore bodies are mainly hosted in Hercynian granodiorite. Their direction of strike indicates probability of other ore bodies occurrence. Silicification and chloritization are important alteration markers,while limonite（ gossan） and tectonic breccias are key prospecting indicators. The burial depth of the ore bodies are such as to indicate a series of deposits,revealing certain prospecting potential of this area.