福建凤山矿区石墨矿地质特征及控矿因素分析

通过对福建省漳平市凤山矿区石墨矿近年来硐探、钻探等地质资料系统的梳理,在分析矿区地质特征和矿体特征的基础上,深入研究了石墨矿的控矿因素。研究认为该区石墨矿是由赋存于中二叠统童子岩组的无烟煤经过高温、高压作用进一步变质而成的。煤层受到岩浆热变质作用使碳物质(煤)分解,重新富集形成以隐晶质(土状)为主的隐晶质石墨矿,因此本区石墨矿的控矿因素是温度和构造。由于过往对福建煤系石墨资源的研究程度不够深入,造成大部分煤系石墨矿划归煤矿,致使石墨矿资源被浪费,本次通过野外地质勘查、采样样品测试等工作,确定了凤山矿区为煤系石墨矿,为下一步勘探工作提供有力依据,为合理开发利用矿产资源指明新的方向。

Analysis of Graphite Ore Geological Features and Ore Control Factors in Fengshan Mine Area,Fujian

Through systematic sorting of recent years tunneling,drilling geological data of graphite ore in the Fengshan mine area,Zhangping City,Fujian Province,on the basis of mine area geological,orebody features analyses have studied graphite ore control factors in detail.The study has considered that the ore is from anthracite hosted in the middle Permian Tongziyan Formation through high temperature and high pressure further metamorphosed into graphite.Anthracite after magmatic thermometamorphic process,carbon material(anthracite)has been decomposed,re-enriched and formed into cryptocrystalline(earthy)graphite ore.Thus graphite ore control factors in the area have temperature and structure.Since the low degree of study on coal measures graphite resources in the Fujian Province has caused most coal measures graphite ores incorporated into coalmines,thus caused graphite ore resources exploitation squander.Through field geological survey,sampling and testing have identified Fengshan mine area is a coal measures graphite ore,thus provided important basis for further exploration works,and pointed out new orientation for mineral resources reasonable exploitation and utilization.