Application of remote sensing technique to the identification of geothermal anomaly in Tengchong area, southwest China

Abstract

Geothermal anomaly in the Tengchong volcanic-geothermal area of southwest China is studied by means of remote sensing technique with application of probability distribution theories to the identification of land surface temperature(LST)anomaly.The LST anomaly in the areas is delineated with the help of elevation information and the spatial distribution of geothermal anomaly is determined according to the combined information of LST anomaly,geologic structure,and hydrothermally altered rocks.A total of eight geothermal anomalies are recognized,in which three of them are identified by this study.Assessments show that the final results are rational in comparison with other geothermal fields,hot springs,and volcanoes documented in references.It suggests thatthe spatial distribution of geothermal anomaly in Tengchong area is controlled by geological structures,and related closely to remote sensing retrieval information of the surface high temperature anomalies and the surrounding alterated rocks.