大兴安岭地区花岗岩型稀有稀土金属矿化信息多光谱遥感解译研究:以内蒙古科右中旗阿里乌拉地区为例  

Multispectral remote sensing interpretation of granite-type rare earth metals information in Daxinganling area:case study with Aliura area in Keyouzhongqi,Inner Mongolia

作　　者：张家旺 王建国[1] 张国亮 陶景梅[3] 汤斯琦 赵伍涛 ZHANG Jiawang;WANG Jianguo;ZHANG Guoliang;TAO Jingmei;TANG Siqi;ZHAO Wutao(College of Earth Sciences,Jilin University,Changchun 130061,China;Jilin Key Laboratory of Satellite Remote Sensing Application Technology,Changguang Satellite Technology CO.,LTD,Changchun 130000,China;Geological Museum,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学地球科学学院,长春130061 [2]长光卫星技术有限公司吉林省卫星遥感应用技术重点实验室,长春130000 [3]吉林大学地质博物馆,长春130026

出　　处：《世界地质》2022年第3期536-544,共9页World Geology

基　　金：中国地质调查局发展研究中心项目(WKZB2011BJM300175/019)。

摘　　要：为提高大兴安岭地区潜在的碱性花岗岩型稀有稀土金属矿床找矿潜力,笔者实测与分析内蒙古阿里乌拉地区碱性花岗岩型稀有稀土金属矿化岩石的反射波谱曲线,结合Landsat-8 OLI、ASTER和吉林一号卫星各遥感影像波谱段响应特征,采用波段比值法和复合主成分分析法研究矿化异常信息的遥感地质解译方法,总结大兴安岭地区碱性花岗型稀有稀土元素矿化信息光谱特性和研究方法。结果显示,研究区矿化岩石在1.01μm、2.34μm处的吸收特征和2.26μm处的反射峰是研究区碱性花岗岩类稀有稀土元素矿化岩石区别于常规花岗岩类的显著波谱特征标志,且分别与吉林一号光谱星的Band19和Aster的Band7和Band8波谱段响应;由于具有响应波段,利用ASTER数据和吉林一号光谱星进行矿化异常信息反演具有良好的效果,且吉林一号光谱星解译精度更高;在研究方法上,复合主成分分析法相较波段比值法提取的信息更加集中,精度更高。In order to improve the prospecting potential of alkaline granite-type rare earth metals in Daxinganling area,the reflection spectrum curve of alkaline granite-type mineralized rocks in Aliura area of Inner Mongolia is measured by authors.The spectral response characteristics of Landsat-8 OLI,ASTER and Jilin-1 satellite remote sensing images are used to analyze the band characteristics.Band ratio and composite principal component analysis are used in the remote sensing geological interpretation method of mineralization anomaly information so that the spectral characteristics and research methods of alkaline granite-type rare earth elements mineralization information are summarized.The results show that the absorption characteristics of mineralized rocks at 1.01μm,2.34μm and the reflection peak at 2.26μm in the study area have obviously spectral characteristics,which are different from the conventional granites and respond to band19 of Jilin-1 spectral star,band7 and band8 of ASTER,respectively.The mineralization anomaly information has good effect by using ASTER and Jilin-1 spectral star,especially,Jilin-1 spectral star interpretation accuracy is higher.In terms of research methods,the information extracted by composite principal component analysis is more concentrated and more accurate than that by band ratio method.

关 键 词：花岗岩型 稀有稀土金属 多光谱遥感 大兴安岭地区 

分 类 号：P618.7[天文地球—矿床学] P627[天文地球—地质学]