近红外光谱分析技术在桂西地区沉积型铝土矿的找矿应用  

Application of near-infrared spectrum analysis technology in prospecting of sedimentary bauxitedeposit in West Guangxi

作　　者：何卫军[1] 张生 文明[1] 王志星[1] 郑健 黄诚 HE Weijun;ZHANG Sheng;WEN Ming;WANG Zhixing;ZHENG Jian;HUANG Cheng(Remote Sensing Center of Guangxi,Nanning 530023,Guangxi,China;Natural Resources Vocational and Technical College,Nanning 532199,Guangxi,China)

机构地区：[1]广西壮族自治区遥感中心,广西南宁530023 [2]广西自然资源职业技术学院,广西南宁532199

出　　处：《矿产与地质》2022年第4期878-884,共7页Mineral Resources and Geology

基　　金：广西壮族自治区地质矿产勘查开发局2018年部门预算前期地质勘查项目(桂地矿综研[2018]21号)资助。

摘　　要：以桂西地区沉积型铝土矿布泉近红外光谱剖面为例,利用近红外光谱分析仪在良好地段进行NIR光谱剖面测量,并对岩石或土壤的蚀变矿物进行光谱测试分析,通过比对分析以建立典型区岩石或土壤光谱特征参数找矿模式,总结出基于近红外光谱分析技术的沉积型铝土矿遥感找矿标志:高岭石峰位移低值区与含Mg-OH矿物峰位移的高值区呈负相关;硬水铝石结晶程度越高则含H_(2)O矿物的半高宽越小。以此推断找矿有利地段,缩小找矿范围,取得了满意的应用效果。The near-infrared spectrum analyzer is used to measure the NIR spectrum profile in a good condition area to test and analyze the alteration minerals in rock and soil for an example of Buquan near-infrared spectrum profile at the sedimentary bauxite deposit in West Guangxi.The prospecting model of spectral characteristic parameters of rock and soil in typical areas is established.The remote sensing prospecting sign of sedimentary bauxite deposit based on near-infrared spectrum analysis technology is summarized according to the comparison and analysis.The low value area of kaolinite peak displacement is negatively correlated with the high value area of Mg-OH mineral peak displacement.The higher the degree of crystallization of diasporite,the smaller the half-height and half-width of H_(2)O bearing minerals.So the favorable areas can be inferred for ore prospecting in order to narrow the scope of ore prospecting area.It is satisfied to obtain a good application result on the basis of near-infrared spectrum technology.

关 键 词：近红外光谱分析仪 找矿模型 找矿标志 铝土矿 桂西地区 

分 类 号：P575.4[天文地球—矿物学] P618.45[天文地球—地质学]