Landsat-8数据的矿化蚀变信息提取及找矿预测
Extraction of Altered Mineral Information and Prospecting Prediction Based on Landsat-8 Image

地质勘查是遥感技术的传统应用领域。招平断裂带中段大尹格庄、姜家窑、夏甸等金矿富集，具有很好的构造蚀变–矿化分带。结合前期相关研究基础，本文将泥化蚀变作为研究区主要遥感蚀变找矿标志，铁化蚀变作为辅助性找矿标志，通过对Landsat-8数据的预处理、主成分变换，提取了研究区泥化和铁化蚀变信息。结果显示泥化蚀变信息与铁化蚀变信息空间分布套合不明显，前者与已有金矿空间耦合性较高。基于蚀变信息分布情况，圈定了9处找矿远景区，为研究区找矿勘查提供技术支撑。
Geological prospecting is a traditional application field of remote sensing technology. The gold deposits in the middle section of the Zhaoping fault belt, such as Dayingezhuang, Jiangjiayao-anXiadian, have a good structural alteration-mineralization zone. Based on the previous research basis, this paper takes argillic alteration as the main remote sensing alteration prospecting indi-cator in the study area. Iron alteration is used as an auxiliary prospecting criterion. All the altera-tion information is extracted by the pretreatment and principal component transform from Land-sat-8 image. The results show that the spatial distribution of argillic alteration and iron alteration is not obvious, and the former has higher coupling with existing gold ore. Based on the distribution of alteration information, nine prospective areas were determined, which could provide technical support for further mineral exploration in the study area.