GF-5高光谱数据在植被覆盖区的蚀变信息提取研究——以广东省玉水铜矿为例

The Study on Alteration Information Extraction of GF-5 Hyperspectral Datain Vegetation Coverage Area: A Case Study of the Yushui Copper Deposit in Guangdong Province

高分五号卫星是我国第一颗高光谱综合观测卫星,自2018年发射以来,还未见到该卫星数据在蚀变信息提取研究领域的相关报道。本研究以高分五号高光谱数据为主要数据源,采用MNF算法、PPI算法,结合SAM技术的方法,提取广东省玉水铜矿植被覆盖区的蚀变矿物信息。本次提取的蚀变矿物有赤铁矿、针铁矿、高岭石、蒙脱石和白云母。结合已知的地质矿产资料,对提取的异常信息进行了分析验证。验证结果显示,该数据提取的蚀变异常与研究区地质信息吻合较好。上述研究表明,利用高分五号高光谱数据对本地区蚀变矿物信息的提取是可行的,对该区未来矿产勘查具有重要的指导意义,同时也为未来高分五号高光谱数据在蚀变信息提取研究方面提供了参考。

GF-5 satellite is China's first hyperspectral integrated observation satellite.Since the launch of GF-5 satellite in 2018,we did not found any studies reported on alteration information extraction.In this paper,GF-5 hyperspectral data were used as the main data source,and the MNF algorithm,PPI algorithm and SAM technology were used to extract the altered mineral information in the vegetation coverage area of the Yushui copper deposit in Guangdong Province.The altered minerals extracted in this study include hematite,goethite,kaolinite,montmorillonite and muscovite.Based on the known geological and mineral resources,the extracted information was analyzed and verified.The verification results show that the information on the altered minerals extracted from the study area is in good agreement with the geological information.In summary,GF-5 hyperspectral data is feasible for the alteration information extraction in this area,and has important guiding significance for copper exploration.At the same time,this study also provides reference for the future research of alteration information extraction of GF-5 hyperspectral data.