The CRM-geothermal project investigates the potential for the combined use of geothermal energy and the recovery of Critical Raw Materials (CRMs) from geothermal systems. A cornerstone of this effort is the CRM-geothermal database, which provides a consolidated, harmonised, and openly accessible repository of information on the occurrence and behaviour of CRMs and associated elements in geothermal environments across Europe and East Africa. This deliverable builds upon Deliverable 1.1 by advancing from data collection to data publication. It documents the process of making the CRM-geothermal database publicly available, ensuring compliance with the FAIR principles (Findable, Accessible, Interoperable, Reusable) and adopting international standards for metadata and licensing. The published database integrates two complementary categories of data: - Existing data, gathered from scientific literature, reports, and legacy project databases (REFLECT, PERFORM), as described in D1.1 (Seres et al. 2024). These datasets provide an essential baseline of knowledge, spanning a wide geographic range and covering diverse geothermal environments. - New data, generated during the implementation of the project through systematic sampling and analysis of geothermal fluids, rocks, scales, and gases in selected sites across Europe and East Africa. These include chemical analyses, mineralogical characterisations, and experimental leaching studies, which enrich the database with high-quality, up-to-date measurements. Data collection within CRM-geothermal is a continuous process throughout the project lifetime. Newly created data are regularly validated, harmonised, and integrated into the CRM-geothermal database, ensuring that the published resource is dynamic, progressively expanding, and constantly improving in quality and coverage. The database is accessible through the dedicated online platform (https://crmgeothermal.iit.uni-miskolc.hu/), which provides search, filter, and visualisation functionalities, and allows users to download datasets in standard formats. The status of the database as of April 2026 is published in a data publication: Seres, Anna; Hartai, Éva; Kieling, Katrin; Regenspurg, Simona (2026): CRM-geothermal Database: Geoscientific and Geochemical Data on Geothermal Systems, with Emphasis on Fluids and Critical Raw Materials in Europe and Eastern Africa. GFZ Data Services. (https://doi.org/10.5880/fidgeo.2026.012). Persistent identifiers (DOIs) and an open access license (CC-BY 4.0) ensure that the datasets can be properly cited, reused, and preserved beyond the lifetime of the project. The publication of the CRM-geothermal database marks a significant milestone: it transforms a heterogeneous collection of legacy and newly generated datasets into a coherent, transparent, and sustainable resource. This database serves as the foundation for the CRM-geothermal Fluid Atlas and will support ongoing scientific research, industrial innovation, and policy-making on the sustainable co-production of heat and critical raw materials.
Seres et al. (Thu,) studied this question.