陕西洛南县景村钼矿地质特征及成因浅析

Geological characteristics and genesis of Jingcun molybdenum mine,Luonan County,Shaanxi Province

景村钼矿位于秦岭褶皱系北缘的北秦岭加里东褶皱带的纸房-永丰褶皱束东段中部,主体由中元古界宽坪群变质火山岩系和浅海相泥砂质碳酸岩夹中基性火山岩系组成,区内构造活动强烈,钼矿体主要分布蟒岭花岗岩体西侧外接触带的中元古界宽坪群广东坪岩组第一岩性段透闪石化斜长阳起片岩中。已找到了数条隐伏钼矿体,矿床达到中型规模。分析了景村钼矿区域地质背景、矿区地质特征及矿床成因,认为该钼矿床与岩浆热液有成因联系,属于岩浆后期高~中温热液矿床。

Jingcun molybdenum mine is located in the middle part of the east section of Zhifang Yongfeng fold bundle in the Caledonian fold belt of the northern Qinling Mountains on the northern margin of the Qinling fold system.It is mainly composed of the Middle Proterozoic KUANPING group metamorphic volcanic rock series and the shallow marine argillaceous carbonate rock with the middle basic volcanic rock series.The tectonic activity in the area is strong.The molybdenum ore body is mainly distributed in the Guanping group of the Middle Proterozoic outside the contact zone on the west side of the mangling granite body The first lithologic member of the petrofabric is diorite plagioclase Yangqi schist.Several concealed molybdenum ore bodies have been found and the deposit has reached a medium scale.Based on the analysis of the regional geological background,geological characteristics and genesis of Jingcun molybdenum deposit,it is considered that the molybdenum deposit is related to magmatic hydrothermal solution and belongs to the late magmatic high middle temperature hydrothermal deposit.