2026-08-05T03:58:04Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:78822026-06-10T10:26:31ZDOIDBDOIDB.GFZ

false4DOIDB.GFZ 10.5880/GFZ.3.1.2024.006 Wilke, Franziska D. H. Franziska D. H. Wilke 0000-0002-3463-6176 GFZ German Research Centre for Geosciences, Potsdam, Germany Mahecho, Albano Albano Mahecho Tanzania Geothermal Development Company (TDGC), Dar es Salaam, Tanzania Regenspurg, Simona Simona Regenspurg 0000-0002-4327-1439 GFZ German Research Centre for Geosciences, Potsdam, Germany Zimmer, Martin Martin Zimmer 0000-0002-8848-2336 GFZ German Research Centre for Geosciences, Potsdam, Germany Jentsch, Anna Anna Jentsch 0000-0001-7552-507X GFZ German Research Centre for Geosciences, Potsdam, Germany Kreitsmann, Timmu Timmu Kreitsmann 0000-0001-8516-3535 School of Science, Constructor University, Bremen, Germany Department of Geology, University of Tartu, Estonia Bau, Michael Michael Bau 0000-0002-7746-3762 School of Science, Constructor University, Bremen, Germany Schröder, Birgit Birgit Schröder 0000-0003-4807-6357 GFZ German Research Centre for Geosciences, Potsdam, Germany Vieth-Hillebrand, Andrea Andrea Vieth-Hillebrand GFZ German Research Centre for Geosciences, Potsdam, Germany Niedermann, Samuel Samuel Niedermann 0000-0003-1626-5284 GFZ German Research Centre for Geosciences, Potsdam, Germany Stammeier, Jessica Jessica Stammeier 0000-0002-3603-3272 GFZ German Research Centre for Geosciences, Potsdam, Germany GFZ Data Services 2024 Elements and Minerals of the Earth Laboratory (ElMiE-Lab, GFZ German Research Centre for Geosciences, Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Microprobe Lab (GFZ German Research Centre for Geosciences, Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Noble Gas Lab (GFZ German Research Centre for Geosciences, Gernany) GFZ German Research Centre for Geosciences, Potsdam, Germany Laboratory for Stable Isotopes (Sediments and Water) (GFZ German Research Centre for Geosciences, Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Laboratory for Compound-specific Isotope Analysis (GFZ German Research Centre for Geosciences, Gernany) GFZ German Research Centre for Geosciences, Potsdam, Germany Gas Geochemistry Lab (GFZ German Research Centre for Geosciences, Germany) GFZ German Research Centre for Geosciences, Potsdam, Germany Wilke, Franziska D. H. GFZ German Research Centre for Geosciences, Potsdam, Germany Dataset DOI of paper when available 10.1180/DHZ http://georem.mpch-mainz.gwdg.de 10.1046/j.1365-2494.1998.53202081.x-i1 10.1144/jgs2014-072 10.1016/S0016-7037(97)00102-6 10.1016/j.lithos.2020.105381 10.1007/bf00470631 CC BY 4.0 In autumn 2022, an expedition to Tanzania was undertaken within the framework of the research project “CRM-geothermal” and Scintific Priority Program (SPP) 2238 “Dynamics of Ore Metal Enrichment”. Within „CRM-geothermal“ we are looking for an environmentally friendly co-production of critical raw materials together with the provision of geothermal energy. In the EARS, high levels of rare earth elements (REE), Sr, Ba and Mg are expected in waters and solids in areas with alkaline volcanic rocks, while other critical elements, including helium, have been sought in other localities. In particular, the eastern branch is the most juvenile sector and has increased geothermal potential related to hot fluids migrating along permeable faults.
Tanzania was crossed from north to south, along the eastern arm of the EARS, to collect gas, water, rock and sediment samples associated with natural hot springs, lakes and vents. On site, physical and chemical parameters were measured in-situ and documented together with the geology, infrastructure and the domestic use of the hot site. In the south, existing drill sites and geothermal development areas were visited and gas and water samples were taken from boreholes and rocks sampled from drill cores. The survey covered 13 sites, from Lake Natron in the north to Lake Malawi in the south (see map).

Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659