江西彭山锡铅锌多金属矿床成矿特征与成因浅析

彭山地区燕山晚期形成的钙碱性花岗岩体与区内有色金属矿产的形成具有直接成因上的联系。四个典型矿床的地质特征及控岩控矿特点反映出矿床均受到了穹窿体系中层间滑动断裂及次级断裂的控制。矿田中部分矿床的硫同住素、铅同住素的分析数据表明，矿床的Sn，Pb，Zn矿物质与岩体具有同源性，岩体的侵位过程为矿床的形成带来大量的矿物质。对成矿机制的研究显示板块作用产生的剪切力是造成区内深部岩石重熔的源动力，而早期形成的断裂体系及后期形成穹窿构造为矿物质的运移提供了有利的通道，在完善的循环对流机制配合下，成矿物质在迁移过程中发生较为充分的分异作用，各类矿物质在相应的物化环境中结晶沉淀，并在有利的构造部位富集成矿。

Study on Metallogenic Characteristics and Genesis of Sn,Pb and Zn Polymetallic Deposits in Penshan region,Jiangxi Province

There is a close relationship between nonferrous metallic deposits and calc-alkaline granitets which formed in late Yanshanian period in Penshan region. The geological characteristics and ore, rock-controling factors indicate those deposits are controlled by the detachment faults in layers and secondary faults. The sulfur and lead isotopic geochemical characteristics of some deposits show that the ore materials mainly came from buried pulton. The invasion of pulton brings a great number of materials. The study of ore-forming rules indicates that the shearing force came from interaction of plate-plate is the initial force, which result in remelting of deep rock. Early formed faults and later dome structures provide favourable passage-way for ore-material migrating. Finally due to complete circulate convection, ore-material experience a process of complete differentation and begin to crystal and settle in certain circumstance. In some favourable tectonic zone ore-forming material enriched to deposit.