光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
Spectroscopy and Spectral Analysis
2015年
11期
3172-3175
,共4页
稀土%光谱分析%遥感地球化学异常%HJ-1A-HSI
稀土%光譜分析%遙感地毬化學異常%HJ-1A-HSI
희토%광보분석%요감지구화학이상%HJ-1A-HSI
REE%Spectral analysis%Remote sensing geochemical anomaly%HJ-1A-HSI
稀土元素的特征谱带基本不随赋存状态的不同而变化，不能用于矿物种类的探测，却能够证实其自身的存在。通过研究稀土元素及其化合物在遥感可见光‐近红外波段的光谱特征，分析了稀土元素含量与特征谱带吸收指数的定量关系。以内蒙古白云鄂博稀土富集地区为例进行试验，通过采集矿区典型岩矿标本的光谱、测试分析样品中Nd含量，表明Nd含量与各特征谱带的吸收深度、吸收指数均存在明显的正相关线性关系，相关性均在0.778以上。其中，726～772 nm谱带的吸收指数与 Nd含量相关性最好，达到0.937。在此基础上，结合HJ‐1A‐HSI高光谱遥感数据的波段设置，构建了定量反演 Nd含量的最优模型，并以此反演了区域N d元素遥感地球化学异常信息。结果表明：与1∶20万水系沉积物地球化学异常对比，二者总体相关性良好。为快速获取区域稀土元素地球化学异常提供了新的手段。
稀土元素的特徵譜帶基本不隨賦存狀態的不同而變化，不能用于礦物種類的探測，卻能夠證實其自身的存在。通過研究稀土元素及其化閤物在遙感可見光‐近紅外波段的光譜特徵，分析瞭稀土元素含量與特徵譜帶吸收指數的定量關繫。以內矇古白雲鄂博稀土富集地區為例進行試驗，通過採集礦區典型巖礦標本的光譜、測試分析樣品中Nd含量，錶明Nd含量與各特徵譜帶的吸收深度、吸收指數均存在明顯的正相關線性關繫，相關性均在0.778以上。其中，726～772 nm譜帶的吸收指數與 Nd含量相關性最好，達到0.937。在此基礎上，結閤HJ‐1A‐HSI高光譜遙感數據的波段設置，構建瞭定量反縯 Nd含量的最優模型，併以此反縯瞭區域N d元素遙感地毬化學異常信息。結果錶明：與1∶20萬水繫沉積物地毬化學異常對比，二者總體相關性良好。為快速穫取區域稀土元素地毬化學異常提供瞭新的手段。
희토원소적특정보대기본불수부존상태적불동이변화，불능용우광물충류적탐측，각능구증실기자신적존재。통과연구희토원소급기화합물재요감가견광‐근홍외파단적광보특정，분석료희토원소함량여특정보대흡수지수적정량관계。이내몽고백운악박희토부집지구위례진행시험，통과채집광구전형암광표본적광보、측시분석양품중Nd함량，표명Nd함량여각특정보대적흡수심도、흡수지수균존재명현적정상관선성관계，상관성균재0.778이상。기중，726～772 nm보대적흡수지수여 Nd함량상관성최호，체도0.937。재차기출상，결합HJ‐1A‐HSI고광보요감수거적파단설치，구건료정량반연 Nd함량적최우모형，병이차반연료구역N d원소요감지구화학이상신식。결과표명：여1∶20만수계침적물지구화학이상대비，이자총체상관성량호。위쾌속획취구역희토원소지구화학이상제공료신적수단。
The characteristic spectral bands of REE do not vary with the occurrence state ,cannot be used to identify mineral spe‐cies ,but can prove the existence of its own .Here we report the spectrum characteristics of REE and their compounds by remote sensing wave bandfrom visible light‐near infrared ,with the quantitative relationship between the contents of REE and absorption index of characteristic spectral bands .The experimental study was carried out in Bayan Obo area ,Inner Mongolia .Spectrums and Nd contents of typical rock and ore samples were gathered and analyzed .There is positive correlation between the Nd con‐tent ,the absorption depth and absorption index of different spectrum characteristics (correlation coefficient >0.778) .Moreo‐ver ,the correlation between absorption index of 726~772 nm band and Nd content is the best ,at 0.937 .As mentioned above , the quantitative model and the inversion information remote sensing geochemical anomaly of Nd were built by the band of HJ‐1A‐HIS hyperspectral remote sensing data .Our results consistent with 1∶200 000 stream sediment geochemical anomalies of Nd . The model provides a new means for rapid extract regional geochemical anomalies of REE .
