Assessing Seferihisar-İzmir (Türkiye) geothermal energy prospects through marine seismic and field geology data modelling

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dc.authoridGürçay, Savaş / 0000-0003-3402-787X
dc.contributor.authorKılınç, Gizem
dc.contributor.authorÇifci, Günay
dc.contributor.authorOkay Günaydın, Seda
dc.contributor.authorHasözbek, Altuğ
dc.contributor.authorGürçay, Savaş
dc.contributor.authorGüngör, Talip
dc.contributor.authorDemirkiran, Zülfü
dc.date.accessioned2025-05-29T02:58:00Z
dc.date.available2025-05-29T02:58:00Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractSeferihisar (Izmir) is one of the most significant geothermal regions in the Aegean of Western Anatolia, Turkiye, due to its high geothermal gradient, extensive fault systems, and unique interaction between marine and meteoric waters that create distinct geothermal reservoirs. This study evaluates the geothermal potential and geological characteristics of the Seferihisar area by integrating marine seismic data with onshore geological observations. Specifically, this study combines: (i) geological and geochemical data from geothermal wells along the Tuzla Fault, (ii) high-resolution multichannel seismic reflection data from the Sigacik and Kusadasi Bays, and (iii) correlated onshore and offshore geological and geophysical datasets to develop a 2D conceptual cross-section and a 3D fault model. Geochemical analyses, including water geochemistry, XRF, and isotope studies, reveal that geothermal fluids in the region originate from a mix of meteoric and marine sources. Chloride concentrations in geothermal wells reach approximately ranging from 11,692 to 12,000 ppm, confirming significant seawater intrusion, while geothermometers estimate reservoir temperatures in the range of 220-280 degrees C. Isotopic data, such as He-3/He-4 ratios (similar to 0.9 Ra), suggest minor mantle involvement, and Ar-40/Ar-36 ratios ranging 301 that indicate crustal contributions to the geothermal fluids. These isotopic signatures provide critical insights into the sources and circulation dynamics of geothermal systems. Through integrated 2D conceptual cross-sections and 3D fault modeling, the study identifies the marine extension of the Tuzla Fault and its role in fluid dynamics, including up-flow and out-flow processes. The fault's continuities are linked to geothermal gradients and active fluid pathways, making the Tuzla Fault a critical target for geothermal exploration. The harmonized models suggest three potential drilling sites with high thermal gradients and fault-controlled fluid flow, optimizing the exploration strategy. Scaling and corrosion challenges in production wells are addressed through the application of inhibitors, which are integral to ensuring sustainable operation and long-term system performance. These multidisciplinary findings provide likely actionable insights into optimizing resource extraction, reducing environmental impact, and improving the long-term performance of geothermal systems. The study supports sustainable geothermal energy development in the Seferihisar region by addressing production challenges and guiding effective resource management.
dc.description.sponsorshipEMODnet Geology 5 [2003K120360]
dc.description.sponsorshipWe would like to express our gratitude to EMODnet Geology 5 for the research experience it provided to the corresponding author and to the State Planning Organization Project (Project Code: 2003K120360) for supporting the establishment of SeisLab. We also thank Landmark and Seamap-Mind Technology Inc. for their contri-butions to data acquisition and processing, and ESRI-ArcGIS for providing the tools used for mapping the data. Additionally, we extend our thanks to IHS for the Kingdom seismic and geological interpretation software. We are deeply grateful to the SeisLab Team and the captains and crew of the research vessel R/V K. Piri Reis for their invaluable efforts in collecting the data. We also thank RSC Electricity Generation Inc. and NTU Geothermal Consulting Ltd. for granting permission to use their onshore data. Finally, we sincerely thank the two anonymous reviewers for their insightful comments and suggestions, which greatly improved the quality of this manuscript.
dc.identifier.doi10.1016/j.geothermics.2025.103295
dc.identifier.issn0375-6505
dc.identifier.issn1879-3576
dc.identifier.scopus2-s2.0-85218862083
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.geothermics.2025.103295
dc.identifier.urihttps://hdl.handle.net/20.500.12428/30233
dc.identifier.volume129
dc.identifier.wosWOS:001438313300001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofGeothermics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250529
dc.subjectTuzla fault
dc.subjectGeothermal energy
dc.subject3D modelling
dc.subjectOnshore-offshore integration
dc.subjectIsotope geochemistry
dc.subjectFluid dynamics
dc.titleAssessing Seferihisar-İzmir (Türkiye) geothermal energy prospects through marine seismic and field geology data modelling
dc.typeArticle

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