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      Geothermal sweetspots identified in a volcanic lake integrating bathymetry and fluid chemistry

      research-article
      1 , 2 , , 1 , 1 , 3
      Scientific Reports
      Nature Publishing Group UK
      Geology, Tectonics

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          Abstract

          We investigate fluid pathways beneath volcanic lakes using bathymetry and geochemical measurements to locate best-possible drilling sites. Highly permeable structures, such as faults, provide fluid channels that are the most suitable access points to the geothermal resource. Accurate mapping of these structures therefore guides the successful targeting of wells. Lakes, rivers or ocean, can hide surface footprints of these permeable structures, such as in our case beneath Lake Linau. High-resolution bathymetry identifies linear and conical discontinuities, which are linked to offshore tectonic structures as confirmed by surrounding outcrops and hot springs. Geochemical measurements document inflow of hot saline acidic water into the lake verifying bathymetry-located highly permeable structures. Integrating onshore well data, our bathymetry and chemical results locates an ideal drilling site into the geothermal reservoir beneath the western shore line of Lake Linau.

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          Most cited references28

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          Satellite remote sensing of earthquake, volcano, flood, landslide and coastal inundation hazards

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            Structural settings of hydrothermal outflow: Fracture permeability maintained by fault propagation and interaction

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              The significance of pockmarks to understanding fluid flow processes and geohazards

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                Author and article information

                Contributors
                brehme@gfz-potsdam.de
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                6 November 2019
                6 November 2019
                2019
                : 9
                : 16153
                Affiliations
                [1 ]ISNI 0000 0000 9195 2461, GRID grid.23731.34, Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Geoenergy, Telegrafenberg, ; 14473 Potsdam, Germany
                [2 ]ISNI 0000 0001 2097 4740, GRID grid.5292.c, TU Delft, Department of Geoscience and Engineering, Stevinweg 1, ; 2628CN Delft, The Netherlands
                [3 ]Upstream Technology Center Pertamina, Jl. MedanMerdeka, Timur no. 6 Jakarta, Indonesia
                Author information
                http://orcid.org/0000-0003-1862-2767
                Article
                52638
                10.1038/s41598-019-52638-z
                6834849
                31695114
                b47633d5-632c-419d-8a45-84bbd13b3ae9
                © The Author(s) 2019

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 28 February 2019
                : 9 October 2019
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                © The Author(s) 2019

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                geology,tectonics
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                geology, tectonics

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