北秦岭成矿带蟒岭岩体中萤石矿床地质特征及成矿作用研究  

Study on geological characteristics and mineralization of fluorite deposit in the Mangling rock mass of the north Qinling metallogenic belt

作　　者：廉康 冯伟 王天 LIAN Kang;FENG Wei;WANG Tian(Research Institute No.203,Xi'an 712000,Shaanxi,China)

机构地区：[1]核工业二〇三研究所,陕西西安712000

出　　处：《矿产与地质》2024年第5期895-905,共11页Mineral Resources and Geology

基　　金：陕西省2021—2023年度地质勘查基金项目(陕地勘金字〔2021〕34号)资助。

摘　　要：蟒岭岩体大地构造位于秦岭复合型大陆造山带之北秦岭构造带,属北秦岭牧护关—蟒岭燕山期铁铜钼钨铅锌萤石成矿带。本文在总结蟒岭岩体中萤石矿床地质特征的基础上,对控矿因素、矿石矿物组合及围岩蚀变等特征分析,其结果表明:该区内萤石矿体主要产于燕山期蟒岭岩体似斑状黑云母二长花岗岩中,严格受断裂构造控制,呈近SN向、NNE向、NWW向等方向展布;矿石类型为萤石—花岗石型、萤石—石英—花岗石型、萤石—石英型、萤石型富矿石等;萤石矿脉有明显的分带性,且具有多期次复合成矿的特征。矿床成因类型为中低温热液充填型脉状萤石矿床。The tectonic structure of the Mangling rock mass located in the northern Qinling tectonic belt of the Qinling composite continental orogenic belt,which belongs to the northern Qinling Muhuguan-Mangling Yanshanian iron-copper-molybdenum-tungsten-lead-zinc fluorite metallogenic belt.On the basis of summarizing the geological characteristics of fluorite deposit in Mangling rock mass,this paper analyzes the characteristics of ore-controlling factors,ore mineral assemblage and wall rock alteration.The results show that the fluorite ore bodies in this area are mainly produced in porphyritic biotite monzonitic granite of Mangling rock mass in Yanshan period,which are strictly controlled by fault structure and distributed in near SN direction,NNE direction and NWW direction.The ore types are fluorite-granite type,fluorite-quartz-granite type,fluorite-quartz type,fluorite type rich ore,etc.The fluorite veins have obvious zoning and have the characteristics of multi-stage composite mineralization.The genetic type of the deposit is a medium-low temperature hydrothermal filling vein fluorite deposit.

关 键 词：萤石矿 地质特征 成矿作用 蟒岭岩体 北秦岭成矿带 

分 类 号：TD952[矿业工程—选矿]