重庆城口高燕锰矿床矿物学特征及成矿环境分析  

Mineralogical characteristics and metallogenic environment of Gaoyan manganese deposit in Chengkou of Chongqing

作　　者：朱明忠 宋志娇[2] 陈翠华[2] 张燕[2] 宋玉坤[2] 张自贤 宋备[2] 

机构地区：[1]重庆市地质矿产勘查开发局205地质队,重庆永川402160 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《矿产与地质》2015年第6期771-775,共5页Mineral Resources and Geology

基　　金：重庆城口高燕锰矿床低品位矿石工艺矿物学研究(省级);高等教育质量工程项目(编号:XJC1105)资助

摘　　要：重庆城口高燕锰矿床是我国第五大锰矿床,矿体以层状、似层状产出于早震旦系陡山沱组中上部,矿石品位低,矿物组成复杂。通过光学显微镜、电感耦合等离子体发射光谱仪等分析手段对高燕锰矿床矿石化学成分及矿物学特征等进行研究,结果表明矿石中主要矿物为菱锰矿、锰白云石;主要脉石矿物为石英、白云石、黄铁矿、以及少量石墨、闪锌矿等;并且矿物种类及含量在空间上有一定的差异性。根据分析结果对矿床的沉积环境进行了初步分析,认为该矿床形成于一具有盆地斜坡性质、从酸性向碱性转化的还原沉积环境中。Gaoyan manganese deposit in Chengkou of Chongqing is the fifth largest manganese deposit in China.The orebody occurs as bedded and stratoid in form inside the middle-upper Doushantuo Formation of early Sinian system with low-grade ores and complicated mineral composition.Through the study on the chemical composition and mineralogical characteristics of the ores from Gaoyan manganese deposit by analytical methods such as optical microscope and inductively coupled plasma emission spectrometer,it shows that the main minerals in the ore are rhodochrosite and kutnahorite,while the main gangue minerals include quartz,dolomite,pyrite,with lesser graphite and sphalerite,and there are some differences in the type and content of minerals in space.According to the results of the preliminary analysis on the sedimentary environment of the deposit,it indicates that the deposit is formed in a reduction sedimentary environment which has the nature of basin slope and changes from acid to alkaline.

关 键 词：锰矿床 矿物学特征 成矿环境 高燕 重庆 

分 类 号：P618.32[天文地球—矿床学]