知识与财富的链接
基于ETM+/TM数据提取矿化蚀变遥感异常已趋于成熟,而利用ASTER(先进星载热发射和反射辐射仪)遥感数据提取矿化蚀变遥感异常鲜有报道.本研究利用USGS波谱数据库中典型蚀变矿物反射率数据,重建其在ASTER数据中波谱曲线.研究表明,ASTER遥感数据可以提取Mg-OH、Al-OH、CO32-和Fe3+离子(基团)信息.热液矿床的蚀变围岩通常含有上述4种离子(基团),它们的波谱特征是蚀变遥感异常提取的理论依据.本研究利用改进"去干扰异常主分量门限技术流程",以河北省承德地区和太行山区为例,上述离子(基团)信息提取结果与野外实际分布相一致,表明利用ASTER遥感数据提取上述4种离子(基团)信息是可靠的.
Mineralization alteration remote sensing anomaly has been perfected based on ETM+/TM data, but al-teration remote sensing anomaly extraction achievement is very poor based on ASTER(Advanced Spaceborne Thermal Emission and Reflection Radiometer) remote sensing data. In the study, we have rebulit alteration miner-alization spectral curves on ASTER remote sensing data based on representative alteration minerals reflectivity data in USGS standard spectral database. We think that four types ions information which are Mg-OH, Al-OH, CO32? and Fe3+ can be extracted. In the paper, a practical application example for Chengde area and Taihang-shang area in Hebei province as example, we have used modifying “de-interfered anomalous principal component thresholding technique flow” to extract the four types of ions information. The results of four types of ions infor-mation be extracted are same to the investigation in the field, which shows extracting the four types of ions infor-mation based on the ASTER remote sensing can be accepted.
