甘肃省成县龙洞湾多金属矿床矿体特征及成因浅析

龙洞湾多金属矿床大地构造处于昆仑秦岭褶皱区秦岭褶皱系礼县-柞水-海西地槽褶皱带中部。属秦岭东西向构造体系与武都弧形构造东翼的复合部位,即西成矿田东部,吴家山背斜的北翼,厂坝、李家沟两大型铅锌矿床的北西延长部位。大地构造位置极为特殊,具有良好的成矿环境及成矿条件。文章通过对本区矿床地质特征、矿体特征、矿石特征等的阐述及矿床成因的浅要分析,认为变质热液充填交代作用是成矿的主要因素,断裂构造是控矿、容矿的主要因素。矿床严格受接触带、岩石组合、角岩化带、北西向、近东西向张扭性断裂的控制,具有多成矿物质来源,多期次成矿等特点,指出矿床类型属与岩浆侵入活动有关的变质热液充填交代型矿床。

Gansu Province Chengxian Longdongwan Polymetallic Ore Deposit Ore Body Characteristic and Origin Brief Analysis

The Longdongwan polymetallic ore deposit geostructure is in middle the Kunlun Mountains Qinling folded region Qinling system of fold Li xian-Zashui Haixi geosyncline belt of folded strata.Is the Qinling thing to east the structural system and the Wudu arc structure wing's compound spot,it's east mine field of Xicheng,the Wujiashan anticline northern,the Changba,Lijiagou two large-scale lead-zinc mine bed's north west lengthens the spot.The geostructure position is extremely special,has the good mineralization environment and the mineralization condition.The article through to the home court ore deposit geological feature,the ore body characteristic,the ore characteristic and so on elaboration and the ore deposit origin shallow must analyze,thought that the deterioration hydrothermal filling metasomatosis is the mineralization primary factor,the faulted structure is controls the ore,mineralization the primary factor.The ore deposit strictly the contact strip,the rock association,the angle lithification belt,north to west,near thing the control which breaks to opens curving,has the multi-mineralization material to originate,characteristics and so on many phase of mineralization,pointed out that the ore deposit type is with the magmatic intrusion related deterioration hydrothermal filling confession ore deposit.