CASI／SASI航空高光谱遥感矿物技术研究--以甘肃北山柳园地区为例

摘要

能源勘查、岩石矿物识别、矿物丰度制图以及成矿远景区圈定是高光谱技术发展和应用的主要方向。 CASI／SASI航空高光谱数据可以在同一平台下同时获取覆盖可见光⁃近红外⁃短波红外光谱段的光谱信息，且光谱分辨率和空间分辨率远远优于多光谱及星载高光谱数据，所以在矿物蚀变信息提取中具有广泛的应用前景。以柳园研究区为研究对象，对CASI／SASI航空高光谱遥感矿物过程中的关键技术进行了实验研究，确定出航空高光谱矿物蚀变信息提取流程，并对研究区蚀变矿物进行识别、填图。通过与研究区地质资料和前人实地勘探资料对比得出，研究区CASI／SASI航空高光谱遥感蚀变异常结果与现实状况相当吻合。%Energy exploration, rock identification, minerals mapping, and metallogenic delineation are the main directions of hyperspectral technology. The spectral information of visible, near⁃infrared and short⁃wave infrared can be obtained under the same platform in CASI/SASI airborne hyperspectral data which has higher spectral resolution and spatial resolution than multi⁃spectral data and spaceborne hyperspectral data and gains broader use in extraction of mineral alteration information. The paper studies the key technologies of mineral extraction and develops the flow of mineral mapping with CASI/SASI airborne hyperspectral data by extracting mineral alteration information such as chlorite, muscovite, montmorillonite, and illite in Liuyuan, Gansu. By comparing geological data and previous exploration data, the extraction results of mineral alteration information are anastomosed to the facts.