品位对鞍山式铁矿反射光谱特征的影响研究  

Effect of Grade on Reflectance Spectra of Anshan Iron Mine

作　　者：王东 刘善军[1] 毛亚纯[1] 李恒宇 祁玉馨 WANG Dong;LIU Shan-jun;MAO Ya-chun;LI Heng-yu;QI Yu-xin(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《光谱学与光谱分析》2020年第10期3193-3198,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(41771404,71790614)资助。

摘　　要：矿物与岩石的可见光-近红外光谱特性与内在理化特性紧密相关,岩矿反射光谱的决定因素是其成分及含量。为明确鞍山式铁矿反射光谱与铁品位之间的关系,采用SVC HR-1024便携式地物光谱仪对不同品位的鞍山式铁矿进行光谱测试,分析铁品位对试样反射光谱的影响规律,明确试样铁品位与反射光谱相关性较显著的敏感波段,并基于此建立铁品位定量反演模型。结果表明,铁品位对赤铁矿、磁铁矿反射光谱的影响规律不尽一致,赤铁矿铁品位的变化不仅会影响试样反射光谱的高低,还会影响试样反射光谱的形态;而磁铁矿铁品位的变化不会影响试样反射光谱的形态,仅会对试样反射光谱的高低产生影响。赤铁矿铁品位在不同的波段处对试样反射光谱影响规律不尽一致,在350~1000 nm波段,试样反射率大小对铁品位反应敏感,该波段光谱反射率与赤铁矿铁品位呈现显著线性负相关关系;在1000~1250 nm波段,反射光谱的斜率对铁品位反应敏感,二者呈现显著线性正相关关系;而在1250~2500 nm波段,试样反射光谱受铁品位影响较微弱。对磁铁矿铁品位与其反射光谱之间的关系进行定量分析,发现铁品位与反射率呈现显著指数函数负相关关系,且这种关系在350~2500 nm波段近乎一致。然后,基于铁品位与赤铁矿、磁铁矿试样反射光谱之间的定量关系,分别建立了赤铁矿、磁铁矿铁品位定量反演模型,并对模型进行了验证。结果表明,模型预测的铁品位绝对误差均小于1%,结果比较理想。该研究揭示了鞍山式铁矿品位对反射光谱的影响规律,并建立了铁品位定量反演模型,为应用光谱分析技术进行铁品位的定量反演提供了新方法。The visible-near infrared spectra of minerals and rocks are closely related to their intrinsic physicochemical properties.The determinants of the reflectance spectra are the composition and the content.The study is focused on the relationship between reflectance spectrum and the grade of Anshan iron mine.The visible-near infrared spectrum of Anshan iron mine with different grade was obtained by SVC HR-1024.The influence of grade on reflectance spectra was analyzed.The sensitive band between the grade and the spectra of the samples were determined.The model for predicting grade of experimental samples was established.The results show that,the effects of grade on the spectra of hematite and magnetite are different.The grade of hematite not only affects the reflectance spectra of samples,but also affects the shape of the reflectance spectra of samples.The grade of magnetite does not affect the shape of reflectance spectra of samples.It only affects the reflectance spectra of samples.The influence of hematite grade on reflectance spectra is not uniform at different bands.In 350~1000 nm band,the reflectivity of samples is sensitive to grade.There is a significant linear negative correlation between reflectance and grade of hematite in this band.In 1000~1250 nm band,the slope of reflectance spectrum is sensitive to grade.There is a significant linear positive correlation between them.However,in 1250~2500 nm band,the reflectance spectra are slightly affected by grade.The quantitative relationship between the reflectance spectra and the grade of magnetite was analyzed.There is a significant negative correlation between grade and reflectance with the exponential function.The relationship is almost the same in the 350~2500 nm band.Then,the grade inversion model of hematite and magnetite had been established.We tested and verified the practicality of the model.The error of these models is less than 1%.The prediction results of these models are ideal.In this paper,the influence of grade on reflectance spectra was clarified.T

关 键 词：鞍山式铁矿 铁品位 可见光-近红外光谱 定量反演 

分 类 号：P237[天文地球—摄影测量与遥感]