Identification of geothermal anomalies with thermal infrared remote sensing and field applications

Date

2024-7-23

Author

Cambazoğlu, Selim

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Western Anatolia, Türkiye is among the most important geothermal regions in the world. In search of new and blind geothermal fields where abundant additional potential is present, this study focuses on combining satellite based alteration mineral, lineament and geothermal anomaly mapping with field and laboratory applications. Alteration mineral maps were generated by utilizing different methodologies and thermal anomaly map was generated through correction of non-geothermal effects by utilizing ASTER satellite images. DEM and ASTER images were used to generate lineament map of the study area. In order to compare the results of generated maps, each application was matched with field applications where XRD analyses were performed for identification of alteration minerals, long term temperature measurements were collected through data loggers developed as part of this study and drone based orthophotographs were collected along with scanline surveys to identify area based fracture system. Finally, GIS based Multi-criteria decision analysis (MCDA) was performed to assess geothermal favorability and compare the results with field measurements. The results have shown that alteration mineral mapping is compatible with the results of the XRD analyses. Satellite based thermal anomaly mapping have presented inconclusive results due to climatic conditions and shallow groundwater presence masking anomalies to be detected at the surface. Field temperature measurements have provided results compatible with decreasing reservoir depth, underlining the importance of field applications in exploration of blind geothermal fields. GIS based MCDA have shown that known deep geothermal wells and locations with highest thermal gradient are located in most favorable class.

Subject Keywords

Thermal Remote Sensing, GIS, Geothermal, Alteration Mineral Mapping, Büyük Menderes Graben

URI

https://hdl.handle.net/11511/110951

Collections

Graduate School of Natural and Applied Sciences, Thesis