摘要
以陕西凤县地区基础地质资料、煤系石墨矿露头和煤矿资料为依据,通过野外地质调查、煤系石墨矿老硐编录及测试分析,运用地质综合分析方法。研究结果表明,陕西凤县煤系石墨矿为隐晶质石墨,矿石为土状石墨,矿体呈似层状、透镜状。发育上下叠置的Ⅰ号和Ⅱ号两个主要矿层,Ⅰ号矿层矿体厚度0~1.8m,平均固定碳含量67.38%,平均视密度1.87g/cm^3;Ⅱ号矿层矿体厚度0~1.4m。可见矿体出现分叉现象,平均固定碳含量84.64%,平均视密度1.90g/cm^3。陕西凤县石炭系隐晶质石墨矿床,是煤层、碳质泥岩形成后经受岩浆岩侵入体加热发生热接触变质作用形成的变成矿床。
Based on the basic geological data,outcrops of coal-based graphite and coalmine data of Fengxian County,geological survey and cataloging of same discarded caves of the deposit and comprehensive geological analysis had been carried out.The results showed that the coal-based graphite deposit in Fengxian County was aphanitic graphite,the ore was amorphous graphite.The ore bodies were layered and lenticular.SuperimposedⅠ andⅡtwo main ore beds were developed.The orebody thickness ofⅠ ore body was 0～1.8 m,the average fixed carbon content was 67.38% and the mean apparent density was 1.87 g/cm^3.The orebody thickness ofⅡ main ore bed was 0～1.4 m,the average fixed carbon content was 84.64%and the mean apparent density was 1.90 g/cm^3.There was a bifurcation phenomenon in the ore body in Ⅱ main ore bed.The Carboniferous coal-based graphite deposit in Fengxian County was a metamorphogenic deposit,of which the origin rocks were coal bed and carbargilite.The origin rocks undergone thermal contact metamorphism through the process of magmatic intrusion.
作者
冯杨伟
吕录仕
Feng Yangwei;Lv Lushi(Xi＇an Center of Geological Survey, China Geological Survey, Xi＇an, Shaanxi 710054, China;Orogen Research Center of China Geological Survey, Xi＇an, Shaanxi 710054, China;Aerophotography ＆ Remote Sensing of China Coal, Xi＇an, Shaanxi 710199, China)
出处
《中国煤炭》
2018年第7期44-48,81,共6页
China Coal
基金
国家自然科学基金项目(41502081)
关键词
矿床地质特征
煤系石墨
热接触
变成矿床
geological characteristics of deposit
coal-based graphite
thermal contact
metamorphogenic deposit
