蒙城县西贾庄铁金多金属矿床成因新认识  

New Understanding of the Genesis of Xijazhuang Iron-gold Polymetallic Deposit in Mengcheng County

作　　者：李永杰[1] 刘彬 闫李军 LI Yongjie;LIU Bin;YAN Lijun(Anhui Institute of Geophysical and Geochemical Prospecting Techniques)

机构地区：[1]安徽省地球物理地球化学勘查技术院,安徽省合肥市230000

出　　处：《现代矿业》2022年第6期28-32,共5页Modern Mining

基　　金：安徽省地质勘查基金项目(编号:2014-1-8)。

摘　　要：蒙城县西贾庄矿床位于华北陆块南缘(Ⅰ级)徐淮地块(Ⅱ级)蚌埠隆起(Ⅲ级)的中段,为小型铁金铅锌矿产地。前人分析区域成矿模式,认为该矿床为沉积变质热液叠加改造型,本次通过对矿床原有成果进行重新分析,发现该区存在多期成矿。早期花岗闪长岩侵入与庄子里组大理岩发生接触交代作用,形成矽卡岩型铁矿床;后期石英二长岩携金多金属含矿热液,沿北东向构造带侵入,形成热液型金多金属矿床。The Xijiazhuang deposit in Mengcheng County is located in the middle section of the southern margin of the North China block(grade I)Xuhuai block(grade II)and the Bengbu uplift(grade III).It is a small iron-gold-lead-zinc mine.The predecessors analyzed the regional metallogenic model and believed that the deposit was a sedimentary metamorphic hydrothermal superimposed transformation type.This time,by re-analyzing the original results of the deposit,it was found that there were multiple periods of metallogenicity in this area.The early granodiorite intrusion had contact metasomatism with the marble of the Zhuangzili Formation,forming a skarn-type iron deposit.In the later period,the quartz monzonite carried gold polymetallic ore-bearing hydrothermal fluid,intruded along the NE trending tectonic belt,and formed hydrothermal gold polymetallic deposits.

关 键 词：矽卡岩型铁矿 热液型金多金属矿 矽卡岩化大理岩 

分 类 号：P618.2[天文地球—矿床学]