首页> 中文期刊> 《有色矿冶》 >辽宁省新宾县沃谷斑岩型钼矿床地质特征及成因探讨

辽宁省新宾县沃谷斑岩型钼矿床地质特征及成因探讨

         

摘要

Wogu molybdenum deposit is hosted in granodiorite body and its external contact zone of mixed granite . It is controlled by both volcanic apparatus annular fracture structure and regmagenesis structure crevasse nearly east -westward . Molybdenum mineralization is closely related to the crack growth degree in the rock . The molybdenum ore is often branch lenticular , lenticular and vein in clusters and zonations . Molybdenum orebodies mainly consists of filling in the cracks in the rock , the parallel or reticulate molyb-denum containing quartz veinlet .The mineralization type is mainly veinlets and disseminated blocks .The ore mineral consists of molybdenite , pyrite , chalcopyrite , sphalerite , galena and magnetite . Hydrothermal alteration in the mining area are well developed , widely distributed , with obvious planar alteration zona-tion ,deposit of wall rock alteration type in turn outward from the center of silicification zone , silicification- potassium ,silicification - pyritization ,epidotization - chloritization . Through analysis of ore genesis , it is believed that WoGu molybdenum deposit is a porphyry type related to volcanic apparatus .%沃谷钼矿床赋存于花岗闪长岩体及其外接触带的混合花岗岩中,受火山机构环状断裂构造与近东西向断裂构造裂隙共同控制,钼矿化与岩石中裂隙发育程度关系密切,钼矿体多呈分枝扁豆状、透镜状及脉状成群成带产出。钼矿体主要由充填于岩石节理、裂隙中的平行或网状含钼石英细脉组成,矿化类型主要为细脉浸染状。矿石矿物为辉钼矿、黄铁矿、黄铜矿、闪锌矿、方铅矿和磁铁矿等。矿区内热液蚀变十分发育、分布广泛,具有明显的面状蚀变分带现象,矿床的围岩蚀变类型从中心向外依次为硅化带、硅化-钾化带、硅化-黄铁矿化带、绿帘石化-绿泥石化。通过对矿床成因进行分析,认为沃谷钼矿床是与火山机构有关的斑岩型钼矿床。

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