Remote sensing alteration anomalies information has been widely used and obtained good results in mineral exploration. However,it is very difficult to make the remote sensing information extraction of alteration anomalies due to complex topography and geomorphology and heavy surface coverage in southwestern China. Exemplified by the Jiufang region in Yunnan,the present paper deals with the main problems for the remote sensing information extraction of alteration anomalies in southwestern China,including the removal of interference information on the topographical and geomorphological features;the selection of the types of the remote sensing information extraction on the basis of geological background and metallogenic conditions,and the post-processing of abnormal information on the basis of existing geological data. The remote sensing anomalies in the Jiufang region appear dominantly in the southeastern part,and subordinately in the central and southwestern parts. The distribution of the remote sensing anomalies is found to be consistent with that of the geochemical anomalies,and associated with the fault distribution. The above-mentioned techniques are proven to be helpful to the improvement of the remote sensing information extraction associated with the mineralization in the local parts of southwestern China.%遥感蚀变异常信息现已广泛的用于矿产勘查,并在一些地区取得了良好的效果,但由于西南地区地形地貌复杂,地表覆盖严重,给遥感蚀变异常提取带来了很大的困难.如何因地制宜的进行西南地区遥感蚀变异常信息提取工作是我们面临的重要问题.本文以云南酒房地区为例,探讨了西南地区遥感蚀变异常信息提取中遇到的主要问题,结合地形地貌特征进行干扰信息的去除;结合地质背景、成矿条件进行遥感异常信息提取类别的选择;以及结合化探异常进行异常信息后处理等几个方面完善了异常提取的方法,使得遥感蚀变异常提取方法更加具有针对性,通过与现有地质资料的分析,证明本文异常提取方法可以有效的提取西南地区与矿相关的蚀变信息.
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