国土资源遥感Issue(3)：54-60,7.
基于ASTER影像的蚀变异常提取方法研究——以赞比亚谦比希铜矿床地区为例
Research on the Methods for Extraction of Alteration Information by Using ASTER Data: A Case Study of the Chambishi Copper Deposit in Zambia
摘要
Abstract
Based on several altered rocks in the Chambishi copper deposit and the spectral characteristics of the rocks existing in VNIR - SWIR bands of ASTER data, the authors adopted the methods of Relative absorption -Band Depth ( RBD) and band ratio to enhance the mineral alteration information in this paper. The band ratio of ASTER 2/ASTER 1 and the RBD of ASTER 3 were used to enhance the chalcopyrite and pyrite information, the RBD of ASTER 8 was used to enhance biotite and calcite information, and the RBD of ASTER 6 was used to enhance the sericite information. To improve the existing method of Crosta principal component analysis, the authors applied the combination of the enhanced band ratio and RBD to Crosta method with the purpose of extracting the alteration information of the copper deposit and neighborhood areas in Chambishi. As proved by known copper deposit locations and geological analysis, the methods mentioned above can effectively extract the alteration information and distinguish the main minerals in the study area. The results are reliable, thus supplying references to the extraction of alteration information.关键词
ASTER/SWIR/蚀变异常/谦比希/相对波段吸收深度(RBD)Key words
ASTER/ SWIR/ Alteration anomalies/ Chambishi/ Relative absorption - Band Depth (RBD)分类
信息技术与安全科学引用本文复制引用
余健,董玉森,张志,杨日红..基于ASTER影像的蚀变异常提取方法研究——以赞比亚谦比希铜矿床地区为例[J].国土资源遥感,2011,(3):54-60,7.基金项目
科技部项目(编号:2008AA121103-3)资助. （编号:2008AA121103-3）
