煤田地质与勘探2017，Vol.45Issue(1)：20-25,30,7.DOI:10.3969/j.issn.1001-1986.2017.01.004
晋中南地区铝土矿矿物特征及其成因
Mineral features and genesis of bauxite deposits in central and southern Shanxi Province
摘要
Abstract
The mineral features of bauxite in central and southern Shanxi Province were studied by polarization mi-croscope, X-ray diffraction (XRD), infrared spectroscopy (IR), differential scanning calorimetry (DSC), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Experimental results show that the major min-erals in bauxite are diaspore and kaolinite, with a few of illite, chlorite, hematite, goethite, anatase, rutile, quartz, flint, potassium feldspar and calcite. Diaspore is divided into three tyes: cryptocrytal-microcrystal, allotriomorphic granular and short columnar crystal with a lower endothermal temperature, anda=0.441546 nm,b=0.945445 nm, c=0.285250 nm, mainly formed by desiliconization of kaolinite, a little was transformed from crystallization. Kaolinite was formed during the weathering process in warm and humid climate and a part of kaolinite was the porduct of silica replacement Anatase was formed in low temperature and low pressure environments with abundant TiO2 supply. Hematite came from dehydration of hydrous ferric oxide mineral, small part from early metallogenic swamp facies or marine deposit; Quartz, potash feldspar and some other heavy minerals are the terrigenous clastic.关键词
铝土矿/晋中南/矿物组成/矿物成因Key words
bauxite/central and southern Shanxi/mineral composition/mineral genesis分类
天文与地球科学引用本文复制引用
王森,何广武,李阔,崔先健,李晓光,刘钦甫..晋中南地区铝土矿矿物特征及其成因[J].煤田地质与勘探,2017,45(1):20-25,30,7.基金项目
北京市共建项目(20121141301) （20121141301）
湖南科技大学页岩气资源利用湖南省重点实验室开放基金项目(E21530) Beijing Joint-Construction Project(20121141301) （E21530）
Funded By Open Research Fund Program of Hunan Provincial Key Labo-ratory of Shale Gas Resource Utilization, Hunan University of Science and Technology(E21530) （E21530）
