贵州省金中镇平安磷矿二矿(扩界)成矿地质特征

Metallogenic Geological Characteristics of No.2 Mine(Extension)of Ping'an Phosphate Mine in Jinzhong Town,Guizhou Province

贵州省开阳地区矿产资源丰富,尤以磷矿最为著名。其中“平安磷矿二矿(扩界)”主要产于震旦系下统陡山沱组中,属中型磷块岩矿床。矿石中的矿物主要以碳氟磷灰石居多,其矿床的成因类型为浅-滨海相沉积的磷块岩矿床类型亚种。本文通过对矿区的成矿地质条件(矿区地层、构造)进行探讨,分析了平安磷矿二矿(扩界)的矿床地质特征(含矿岩系、矿石组构、矿物成分、矿石类型等),不仅为该地区磷矿资源勘查提供相对可靠的参考依据,还可以服务于矿区周边的有利找矿靶区。

Guizhou Kaiyang area is rich in mineral resources,especially phosphate rock.Among them,"Ping'an Phosphate Mine No.2(Extension)"mainly occurs in Doushantuo Formation of Lower Sinian System,which is a medium-sized phosphorite deposit.The minerals in the ore are mainly fluorocarbon apatite,and the genetic type of the deposit is a subspecies of phosphorite deposit type deposited in shallow-coastal facies.This paper discusses the metallogenic geological conditions(strata and structure of the mining area),and analyzes the geological characteristics(ore-bearing rock series,ore fabric,mineral composition,ore type,etc.)of Ping'an Phosphate Mine No.2(extension),which not only provides a relatively reliable reference for the exploration of phosphate resources in this area,but also serves the favorable prospecting target areas around the mining area.