航空热红外高光谱在岩性识别中的应用——以甘肃柳园地区TASI数据为例

Application of Airborne Thermal Infrared Hyperspectroscopy in Lithology Identification:A case study of TASI Data in Liuyuan,Gansu

航空热红外高光谱遥感作为近年新发展起来的对地观测技术,同时具有高空间分辨率和高光谱分辨率的技术特点,具备从空间大尺度上精细探测和分析地表造岩矿物成分的能力。基于航空热红外高光谱TASI数据,在分析常见矿物发射波谱特征的基础上,开展了柳园研究区岩性识别和分类研究,充分发掘TASI数据图谱合一特点,图像分类,光谱定性,从每种岩体、地层岩性单元的光谱角度对所属岩性进行判定。结合研究区花岗岩地质背景,系统分析标型矿物SiO2受岩石共生矿物影响的光谱规律变化特性,进行岩性识别和评价试验。结果表明:航空热红外高光谱可全面提高遥感岩矿识别的种类和精度,为大区域的矿物识别和岩性分类提供了一种新的快速有效的手段。

Aerial thermal infrared hyperspectral remote sensing,as a newly developed Earth observation technology in recent years,has the characteristics of high spatial resolution and high spectral resolution,and has the ability to finely detect and analyze the composition of surface rock forming minerals on a large spatial scale.This study is based on aviation thermal infrared hyperspectral TASI data.On the basis of analyzing the emission spectrum characteristics of common minerals,a study on lithology recognition and classification in Liuyuan study area was conducted.The integration characteristics of TASI data spectrum,image classification,and spectral qualitative analysis were fully explored,and the attributes of rock units were judged from the perspective of each stratigraphic unit spectrum.Based on the geological background of the granite type in the study area,systematic analysis of the spectral variation characteristics of standard mineral SiO2 affected by rock associated minerals,and conduct lithology identification and evaluation experiments.This study indicates that aerial thermal infrared hyperspectral imaging can comprehensively improve the types and accuracy of remote sensing rock and mineral identification,providing a new fast and effective means for mineral identification and lithology classification in large regions.