GPR Application on Geothermal Studies: The Case Study of the Thermal Baths of San Xusto (Pontevedra, Spain)

Remote Sensing

Mercedes Solla¹  Juan Luis Rodríguez¹  Ignacio Martín Nieto²  Miguel Ángel Maté-González²  Cristina Sáez Blázquez³ 

[1] CINTECX, GeoTECH Research Group, Universidade de Vigo, 36310 Vigo, Spain;Department of Cartographic and Land Engineering, Higher Polytechnic School of Avila, University of Salamanca, Hornos Caleros 50, 05003 Avila, Spain;Department of Electric, System and Automatic Engineering, Universidad de León, 24004 León, Spain;

关键词: geothermal reservoirs;    near-surface imaging;    ground-penetrating radar;    geophysical prospecting;    thermal structures;   

DOI  :  10.3390/rs14112667

来源: DOAJ

【 摘 要 】

Geophysical studies are frequently used on the geothermal field to define and characterize deep structures. However, shallow investigations are also needed for understanding the origin and local potential structures of a promising geothermal site. In this research, it is intended to present a review of the possibilities of the application of ground-penetrating radar (GPR) on the study of geothermal resources and how this geophysical technique can contribute to improving the energy use of these thermal resources. For this, the specific case of application to the investigation of the thermal baths of San Xusto (Pontevedra, Spain) is included in this work, whose interest for the region makes it necessary to perform an in-depth analysis of the original thermal structure. A GPR survey with frequency antennas of 200 and 500 MHz was conducted. Additionally, chemical analyses were performed to characterize the thermal water in the San Xusto site. As a result, a hot spring was detected by identifying reverberation phenomena in GPR imaging due to the presence of metal compounds and silica. Locating the origin of the thermal springs could allow for a more efficient use of the thermal resources as well as the hydrothermal possibilities of the area.

【 授权许可】

Unknown