eprintid: 1844 rev_number: 10 eprint_status: archive userid: 6 dir: disk0/00/00/18/44 datestamp: 2017-03-02 11:08:12 lastmod: 2017-03-02 11:08:12 status_changed: 2017-03-02 11:08:12 type: article metadata_visibility: show creators_name: Geiermann, Johannes creators_name: Schill, Eva corp_creators: Institut für Geothermisches Ressourcenmanagment, ITB gGmbH, Bingen, Germany corp_creators: Institut d’hydrogéologie et géothermie, université de Neuchâtel, Switzerland title: 2-D Magnetotellurics at the geothermal site at Soultz-sous-Forêts: Resistivity distribution to about 3000m depth subjects: O subjects: RF1 subjects: SG divisions: IP4 full_text_status: none keywords: Rhine Graben; Soultz-sous-Forêts (France); Geothermal Site; 2-D Magnetotellurics; Resistivity distribution abstract: With the aim of investigating the possibilities of magnetotelluric methods for the exploration of potential Enhanced Geothermal System (EGS) sites in the Upper Rhine valley, a 2-D magnetotelluric (MT) survey has been carried out on a 13 km long profile across the thermal anomaly in the area of the geothermal power plant of Soultz-sous-Forêts in the winter 2007/08. Despite strong artificial noise, processing using remote referencing and Sutarno phase consistent smoothing revealed significant results from 10 out of 16 sites. Indication for 1-D structures was found in the shortest periods, 2-D effects in the periods up to 40 s, and 3-D effects in the long period range. Since 3-D effects were found in the longer periods, 2-D inversion was carried out for periods smaller than 40 s. The results of the inversion are consistent with the geology of the geothermal site and distinguish well the sediments from the granitic basement including the structures given by the faults. A conductive anomaly with a resistivity of about 3 Ωm has been found at a depth down to 2000 m in the area of the Soultz and Kutzenhausen faults, which is attributed to geothermal processes. date: 2010 date_type: published publication: Comptes Rendus Geoscience volume: 342 number: 7-8 publisher: Elsevier pagerange: 587-599 id_number: doi:10.1016/j.crte.2010.04.001 issn: 1631-0713 official_url: http://doi.org/10.1016/j.crte.2010.04.001 access_IS-EPOS: limited owner: Publisher citation: Geiermann, Johannes and Schill, Eva (2010) 2-D Magnetotellurics at the geothermal site at Soultz-sous-Forêts: Resistivity distribution to about 3000m depth. Comptes Rendus Geoscience, 342 (7-8). pp. 587-599. DOI: https://doi.org/10.1016/j.crte.2010.04.001