Extraction Of Alteration Information Of Dandong-Fengcheng In Liaoning Province Based On Multispectral/Hyperspectral Remote Sensing Data

With the continuous progress of human civilization and the contradiction between economic development and environmental protection,the development of low-carbon economy and green economy has become a development issue in many countries.At the same time,with the development of the society,the traditional energy resources such as coal,oil,natural gas has dried up and caused serious damage to the environment,in the face of a series of ensuing problems,clean energy is particularly important.Geothermal resources refers to the interior of the earth for human use of thermal energy resources as a kind of clean,green,low carbon renewable new energy,the development and utilization of geothermal resources to relieve the energy crisis and the climate warming,energy saving and emission reduction,etc.As a renewable energy source,geothermal resources have gradually replaced the use of other forms of energy and become an important part of future energy.Compared with traditional energy,geothermal resources have more advantages,such as large reserves,renewable and environmental protection,which are not only clean,but can be used on the spot and inexhaustible.Therefore,in recent years,geothermal resources have attracted worldwide attention.As assistant for geothermal energy,based on Dandong-Fengcheng area of remote sensing image data,combined with Dandong-Fengcheng region ground measured mineral samples alteration mineral spectrum information,verification of Dandong region Fengcheng alteration mineral spatial distribution and the relationship between the geothermal energy.This study selects the multispectral ASTER images and hyperspectral Hyperion as a data source,based on remote sensing image processing software ENVI,information research zone alteration mineral characteristics and spectral characteristics of the measured data with the ground comprehensive comparison and analysis,put forward the suitable for research in multispectral and hyperspectral data process of identification and extraction of alteration information,of the raw data obtained in atmospheric correction after a series of pretreatment,can better to eliminate interference of raw data,in order to obtain higher reflectivity data quality,analyzes the spectrum of ASTER image and Hyperion image of reflection and absorption characteristics,respectively using the method of principal component analysis and spectral Angle mapping(SAM)characteristics of study area alteration mineral extraction of white mica,black mica,etc.Area through the study of remote sensing image are extracted to hot spring point alteration minerals and ground measured point data,this paper compares and analyzes the results of the study show that influenced the hot springs area points to form the main alteration mineral form for white mica sericitization,there are also some other mineral alteration,such as white mica,kaolin,etc.In the mineral alteration of the hot points and the surrounding typical extraction using remote sensing data in the study hotspot alteration mineral information can correctly reflect the geothermal features in the study area,also can further speculated that the formation of hot springs and other geothermal energy and the relationship between some of the main mineral alteration.