关键词: 蚀变矿物, 光谱测试, 光谱特征谱带, 遥感波段组合, 包古图斑岩铜矿, 新疆

Abstract:

Spectral characteristics of ground objects are the main information for target recognition by remote sensing. Being different special reflection spectra in each object, reflection spectra provide lots of important information for remote sensing information extraction. In this paper，the reflection spectra of altered rocks from intrusions(No.2 and No.5) in Baogutu porphyry copper deposit have been tested by ASD and PIMA. The mineral recognition of samples from surface and drills  has been detailedly studied. Altered mineral assemblages and the special bands of absorptive vale of reflectance spectra have been obtained from ASTER data. Mathematic integral method has been carried on the reflectance spectra and obtained the strong absorptive bands from ASTER data. Based on analyzing reflectance spectra and the mathematic integral, absorptive band assemblages give lots of information for extracting alteration remote sensing anomalies. The results show that alteration remote sensing anomalies and the geological feature have a good comparability.Ascertaining  spectral characteristics of altered minerals is the principle and basis for remote sensing information extraction.

Key words: altered mineral, spectrum analysis, spectrum band on spectral characteristic, remote sensing bands assemblage, Baogutu porphyry copper deposit, Xinjiang