10.5880/GFZ.3.1.2024.003 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2024-12-19 urn:ogc:def:crs:EPSG:4326 CRM-geothermal - geochemical results of drill core material, scaling and salt precipitates at Tuzla, Seferihisar and Dikili geothermal sites, Eastern Turkey 2024-12-19 revision doi:10.5880/GFZ.3.1.2024.003 Strauch, Bettina GFZ German Research Centre for Geosciences, Potsdam, Germany author Wilke, Franziska D. H. GFZ German Research Centre for Geosciences, Potsdam, Germany author Stammeier, Jessica GFZ German Research Centre for Geosciences, Potsdam, Germany author Ayzit, Tolga Izmir Institute of Technology, Department of International Water Resources, İzmir, Türkiye author Tonkul, Serhat Izmir Institute of Technology, Department of Environmental Engineering, İzmir, Türkiye author Demir, Mustafa Muammer Izmir Institute of Technology, Department of Material Science and Engineering, İzmir, Türkiye author Baba, Alper Izmir Institute of Technology, Department of International Water Resources, İzmir, Türkiye author Ayzit, Tolga Izmir Institute of Technology, Department of International Water Resources, İzmir, Türkiye originator Tonkul, Serhat Izmir Institute of Technology, Department of Environmental Engineering, İzmir, Türkiye originator Demir, Mustafa Muammer Izmir Institute of Technology, Department of Material Science and Engineering, İzmir, Türkiye originator Baba, Alper Izmir Institute of Technology, Department of International Water Resources, İzmir, Türkiye originator Elements and Minerals of the Earth Laboratory (ElMiE-Lab) German Research Centre for Geosciences Potsdam, Germany originator GFZ Data Services publisher The EU funded project CRM-geothermal aims to establish an overview of the potential for critical raw materials (CRM) in geothermal fluids across the EU and third countries (Ref). Within this framework, the geothermal sites of Tuzla, Seferihisar and Dikili in eastern Turkey have been visited in March 2023. To estimate the potential of CRM at these sites, a comprehensive sampling program was performed. Rock samples (drill gravel) of the production borehole and scaling from gas-water separators were obtained. Furthermore, sampling of geothermal fluids (gas and brine) and precipitates (salt) along the production line was performed. Here, the results of the geochemical analyses of solid sample materials (drill gravel, scales and salt) are presented. All analyses were performed in the ElMiE-Lab (Elements and Minerals of the Earth Laboratory) at German Research Centre for Geosciences Potsdam, Germany (https://labinfrastructure.geo-x.net/laboratories/8). For their major and minor element compositions, bulk samples of drill gravel and scales were analyzed with XRF and ICP-MS, respectively. Salt precipitates were analyzed for dry loss and mineral composition using XRD. Strauch, Bettina betti@gfz-potsdam.de https://labinfrastructure.geo-x.net/laboratories/8 informtion pointOfContact critical raw materials geothermal power plant eastern turkey drill gravel scales salt precipitates geochemistry XRF ICP-MS XRD EARTH SCIENCE > HUMAN DIMENSIONS > ECONOMIC RESOURCES > ENERGY PRODUCTION/USE > GEOTHERMAL ENERGY PRODUCTION/USE NASA/GCMD Earth Science Keywords publication energy > energy type > non-conventional energy > geothermal energy GEMET - INSPIRE themes, version 1.0 publication Models/Analyses > CRM GCMD Platforms publication CC BY 4.0 CC BY 4.0 10.5880/GFZ.3.1.2024.002 DOI References 10.1107/S1600576715014685 DOI Cites eng geoscientificInformation Seferihisar Power Plant production well 1 26.9105 26.9105 38.123 38.123 Seferihisar Power Plant production well 2 26.9119 26.9119 38.1267 38.1267 Tuzla Power Plant production well T9 26.173 26.173 39.5659 39.5659 Tuzla Power Plant production well T16 26.1784 26.1784 39.5659 39.5659 Tuzla Power Plant production well T18 26.1726 26.1726 39.5664 39.5664 Dikili Region, geothermal site production well 1 26.968 26.968 39.0691 39.0691 Dikili Region, geothermal site production well 2 26.9732 26.9732 39.0671 39.0671 http://doi.org/10.5880/GFZ.3.1.2024.003 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information Sampling of drill gravel: Drill core gravel from Tuzla geothermal site was obtained from existing samples taken during drilling in 2010. For the analyses, three samples of the geothermal reservoir horizon at different depth and from two different drill holes were chosen. Sampling of scales: Scales were sampled during geothermal power plant maintenance in 2023 in Tuzla and in 2022 in Seferihisar. It was analyzed from all water-gas separators from the three drill holes in Tuzla. For Seferihisar, fresh scales were obtained from inside a tube, a pump and a fitter. Sampling of salt precipitates: During the visits, fresh salt precipitates were taken from outside the pipeline that transports geothermal brine to the power plant. The sampling points were located near the production well. Here, few connectors were slightly leaking which is negligible for the geothermal power production. Over time, the small amounts of brine release causes salt precipitation, due to brine cooling and evaporation. The residual salts occurs in form of fine crystalline precipitations around the pipe connectors or, stalactite-like salt tubings. Sampling of fresh, slightly moist material was performed by either scratching material off the precipitate deposit or breaking off juvenile stalactite outgrowth. The sample were stored and transported in air-tight zipper plastic bags to avoid sample alteration by atmospheric air.