摘要
通过地质调查与钻探施工,在安徽省金寨县张店地区发现了石墨矿床,在总结和分析矿床地质特征的基础上,对矿区内与石墨矿床有成因联系的侵入岩体进行取样分析。结果表明:区内邻近矿体的花岗闪长岩的碱度率平均值AR=2.10,属钙碱性酸性花岗岩,与成矿关系密切。结合矿床地质特征和控矿规律,认为含炭质地层Cz1-3岩性段为石墨矿的形成提供了物质基础;酸性岩浆侵入提供成矿时的温压条件;地层与侵入体之间的接触界面呈犬齿交错状,地层倾角在20°~40°之间易于成矿。研究成果为指导和发现本地区同类型矿床提供参考。
A graphite deposit has been found through geological survey and drilling project in Zhangdian area of Jinzhai County,Anhui Province.The samples of intrusive rock mass associated with the genesis of graphite deposit are analyzed on the basis of summary and analysis of the geological characteristics of the deposit in the mining area.The result shows that the average alkalinity ratio of granodiorites near the orebodies in the area is AR =2.10.They are calci-alkali acid granites,which is closely related to the mineralization.With the combination of geological characteristics of the deposit and the ore-controlling regularity,it is considered that the Cz1-3 lithologic section of the carbonaceous stratum provides a material basis for the formation of graphite deposit.The acid magma intrusion provides the temperature and pressure conditions during mineralization.The contact interface between the stratum and intrusive body is canine-tooth-staggered,and it is easy for the mineralization when the inclination angle of the stratum is between 20°and 40°.The research result provides a reference for guiding and discovering the same type of deposits in this area.
作者
王西荣
李绍侠
WANG Xirong;LI Shaoxia(Institute of geology and experiment of Anhui,Bureau of Geology and Mineral Exploration of Anhui Province,Hefei 230001,Anhui,China;School of Distance Education,Nanjing University,Nanjing 210093,Jiangsu,China)
出处
《矿产与地质》
2019年第6期1034-1040,共7页
Mineral Resources and Geology
基金
安徽省国土资源厅公益性项目“金寨地区晶质石墨矿远景调查”(皖国资第2016-g-3-27)
安徽省国土资源厅战略性矿产资源勘查项目“安徽省金寨县银水寺-皂河富铅锌矿普查”(皖国资第2003-6)共同资助。
关键词
石墨矿
酸性花岗岩
含炭质地层
碱度率
地质特征
控矿规律
graphite deposit
acid granite
carbonaceous stratum
alkalinity ratio
geological characteristics
ore-controlling regular
