基于Aster数据的遥感蚀变信息提取——西藏珠勒地区为例

Remote Sensing Alteration Information Extraction Based on Aster Data——Zhule Region,Tibet

西藏地区是我国重要的矿产资源存储地区,研究区西藏珠勒地区火山-岩浆作用发育,为火山岩覆盖地区。研究区热液蚀变类型丰富,绿泥石化、绿帘石化、碳酸盐化等蚀变信息,采用ASTER数据可提取多种蚀变矿物信息。通过对分析研究区蚀变信息,圈定出三个找矿靶区,以期减小找矿工作量以及提升找矿效率,为下一步的找矿预测活动提供更多支持。

The Tibetan region is an important mineral resource storage area in China. The volcanic-magmatic interaction is developed in the study area, the Tibetan Jhule area, which is covered by volcanic rocks. The study area is rich in hydrothermal alteration types, chloritization, chlorite, carbonatization and other alteration information, and a variety of alteration mineral information can be extracted by using ASTER data. By analysing the alteration information in the study area, three target areas were identified, with a view to reducing the search workload and improving the efficiency of the search, and providing more support for the next search and prediction activities.