中钢澳大利亚 Carpentaria 锰矿矿权区 ASTEＲ数据蚀变信息提取研究

应用 ASTEＲ 多光谱卫星遥感数据，根据与锰矿相关的蚀变矿物光谱特征，采用主成份分析算法，提取了中钢集团所属的澳大利亚 Carpentaria 锰矿矿权区铁染、羟基、碳酸盐化、锰和硅化的蚀变信息。ASTEＲ 数据在锰矿化蚀变信息提取中能更好的识别不同类型含羟基蚀变矿物，能更好的提取含三价 Fe 离子的蚀变信息及锰矿物蚀变信息。对这些蚀变信息进行深入分析将有助于矿权区锰矿地质研究和勘查目标的确定。

Alteration information extracting based on ASTER data of Sino steel manganese ore mining area in Carpentaria,Australia

According to the spectral features of alteration minerals associated with manganese ore，the authors use principal component analysis and ASTEＲ data to extract the main alteration information of iron stained minerali- zation，hydroxyl，carbon mineralization，manganese mineralization and silicon mineralization in Sino steel manga- nese ore mining area in Carpentaria area，Australia． ASTEＲ data can identify different types of hydroxyl alteration mineral，and extract trivalent Fe ion alteration information and manganese alteration information． The in- depth analysis of these alteration information will help to study the manganese geology and identify exploration targets．