安徽岳西矽线石矿地质特征及控矿条件探讨

Disscussion on Geological Characteristics and Ore Controlling Conditions of Sillimanite Deposit in Yuexi County,Anhui Province

通过收集整理相关资料,总结了安徽省岳西县回龙山一带矽线石矿床的一般地质特征。矿体赋存于水竹河岩组第二、四、六岩性段内,矿带总长4800m,共圈出矿体47个,工业矿体12个。矿体呈似层状、透镜状、扁豆状,矿体长20~200m,宽2~10m,最大沿深178m。矿体具明显的层控特征,矽线石含量为10%~26.5%,平均14.8%,矽线石精矿品位为Al2O356.0%。岩浆活动、多期次区域动力变质叠加改造,提供了形成矽线石所需的较高温度和压力条件。本文探讨了寻找同类型矿床必须具备的“水竹河组地层+岩浆岩+变质作用”三个控矿条件,旨在为指导和发现本地区同类型矿床提供借鉴。

Sillimanite deposit of refractory materials is a necessary mineral product for metallurgical industrial technology industries.The nonmetallic mineral resources is rich in Huilongshan area,Yuexi county,Anhui province.The general geological characteristics of sillimanite deposit are understood by collecting and sorting out data:the ore-body occurs in the second,fourth and sixth lithologic sections of Shuizhuhe formation,with a total length of 4800m,47 ore-bodies and 12 industrial ore bodies are circled;the ore-bodies are bedlike,lenticular and lenticular,with a length of 20~200m,a width of 2~10m,and a maximum depth of 178m.The ore-body has obvious characteristics of stratabound.The content of sillimanite is 10%~26.5%,with an average of 14.8%.The grade of sillimanite concentrate is 56.0%Al2O3.Magmatic activity and multi-stage regional dynamic metamorphism superimposed transformation provided high temperature and pressure conditions for sillimanite formation.Three ore controlling conditions of"Shuizhuhe formation strata+magmatic rock+metamorphism"must be possessed in order to find the same type deposits in this area.The purpose of this study is to provide reference for guiding and discovering the same type deposits in this area.