应用多光谱ASTER数据对ETM遥感异常的定性判别研究-以东昆仑五龙沟为例

Application study of multi-spectral ASTER data for determination of ETM remote sensing anomaly property: Taking Wulonggou region of eastern KunLun mountain range as example.

文中讨论了新的找矿参数——蚀变遥感异常的地质基础和光谱前提,在矿床地质学和蚀变矿物光谱参数特征的基础上,编制了一张用于遥感异常提取及对其地质解释的表格。ETM遥感异常提取技术已在全国推广,ASTER数据可以在三个方面对已推广的ETM起到重要的补充作用:1.利用短波红外增设的波段,对某些矿致异常区分其矿化(矿床)类型;2.利用增设的热红外波段区分某些岩性;3.可有助于解决ETM因第7波段太宽而产生的许多疑难问题。本文以东昆仑五龙沟为例讨论了ASTER对于解决ETM遥感异常性质判别困难方面的作用。

The geological basis and the spectral, presupposition for the alteration anomalies, as the new parameter for the prediction of the mineral resources, are discussed. On the basis of deposit geology and spectral characteristics of altered minerals a table for extraction of remote sensing anomaly and geological interpretation was constructed. The multi-spectra-remote sensing techniques for extraction of ETM (Enhanced Thematic Mapper) anomalies were already popularized for the whole country. The ASTER (Advanced Space-borne Thermal Emission and Reflection radiometer) data can play important auxiliary role for ETM data in 3 aspects: 1. for determination of the mineralization types for several types of deposits, using the added new SWIR channels; 2. for determination of several rock types, using the added TIR channels; 3. for resolving several problems with ETM RS anomaly due to the big width of the 7(th) channel. This work shows the study results of ASTER data for Wulonggou region of eastern Kunlun mountain range in solving of the problems with determination of the property of the ETM RS anomaly.