安徽铜陵荷花山铅锌银矿床与密西西比河谷型铅锌矿床特征对比研究  

A comparative study on the characteristics between Hehuashan Pb-Zn-Ag deposit, Tongling, Anhui Province and Mississippi Valley-type Pb-Zn deposit

作　　者：王允 WANG Yun(Comprehensive Geological Brigade,East China Metallurgical Geological Exploration Bureau,Ma’anshan 243000,China)

机构地区：[1]华东冶金地质勘查局综合地质大队

出　　处：《合肥工业大学学报（自然科学版）》2019年第11期1546-1550,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省省级地质勘查基金重点358资助项目(2010-2-18,2013-3-1,2015-1-1,2016-3-1)

摘　　要：近年来经过安徽省地勘基金投资勘查,在铜陵矿集区发现一种新类型类似于密西西比河谷型(Mississippi Valley-type,MVT)型的荷花山铅锌银多金属大型矿床。通过对钻孔中赋矿岩石的深入研究和科研项目的平行推进,发现该矿床有许多与MVT型矿床类似和不同的特征。相似特征为:赋矿围岩特征相似,均为白云岩灰岩地层;矿床中均存在有机质;成矿流体均为盆地卤水。不同特征为:荷花山矿床成矿流体盐度相比MVT铅锌矿床较低;赋矿围岩下伏地层不同。通过从不同角度的对比,揭示了这种新类型矿床的成矿特征,对该新类型矿床的成矿特征有了进一步认识,即其为一个新类型的铅锌矿床,这一认识对在本区寻找相似类型矿床具有借鉴意义。In recent years,a new deposit named Hehuashan Pb-Zn-Ag polymetallic deposit,which is similar to Mississippi Valley-type(MVT)deposit,has been discovered in Tongling ore area based on the geological survey funded by Anhui geological exploration fund.Through the in-depth study of the host rock in the borehole and the parallel advancement of the scientific research project,it is found that the deposit has many similar and different characteristics with typical MVT deposit.The similar characteristics are as follows:the features of the ore-bearing surrounding rock are similar,all are dolomite limestone strata;organic matter is present in the deposit;the ore-forming fluid derives from basin brine.The differences are as follows:the ore-forming fluid salinity of the Hehuashan deposit is lower than that of the MVT Pb-Zn deposit;the underlying strata of the ore-bearing surrounding rock are different.The metallogenic characteristics of the deposit are revealed through the comparison from different angles,and the metallogenic characteristics of this new type of deposit are further understood.It is concluded that the Hehuashan deposit is a new type deposit.This understanding has positive reference significance for searching similar deposits in this area.

关 键 词：荷花山 铅锌矿床 密西西比河谷型(MVT) 矿床地质特征 

分 类 号：P611.22[天文地球—矿床学]