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Diffuse Helium and Hydrogen Degassing to Reveal Hidden Geothermal Resources in Oceanic Volcanic Islands: The Canarian Archipelago Case Study

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Abstract

We report herein the results of soil gas geochemistry studies, focused mainly on nonreactive and/or highly mobile gases such as He and H2, in five mining licenses at Tenerife and Gran Canaria, Canary Islands, Spain, during 2011–2014. The primary objective was to sort the possible geothermal potential of these five mining licenses, thus reducing the uncertainty inherent to the selection of the areas with highest geothermal potential for future exploration works. By combining the overall information obtained by the statistical–graphical analysis of the soil He and H2 data, the spatial distribution of soil gas concentrations and the analysis of selected chemical ratios of the soil gas to evaluate the influence of deep-seating degassing, two of the five mining licenses (Garehagua and Abeque, both located in Tenerife Island) seemed to show the highest geothermal potential. These results will be useful for future implementation and development of geothermal energy in the Canaries, the only Spanish territory with potential high-enthalpy geothermal resources, thus the most promising area for high-enthalpy geothermal installations.

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Acknowledgments

This work has been partially funded by the Projects GEOTHERCAN (IPT-2011-1186-920000) and GEOHELIO (PTQ-12-05661) of the Spanish National R + D + I Plan 2008–2011, the Instituto Tecnológico y de Energías Renovables (ITER), the Instituto Volcanológico de Canarias (INVOLCAN), Petratherm España, the Cabildo de Tenerife and the D.G. Industry and Energy of the Canary Islands Government. We are especially grateful to D. Nolasco, M. Díaz, R. Antón, D. Aragón, C. Báncora, M. Cordero, P. González, A. González-Santana, D. Mani, A. Nannoni, D. Nieto, R. Pérez, M. Refoyo, P. Rodríguez, A. Toscano and R. Vega for their assistance in the field works and laboratory analysis. We also want to thank Cañadas del Teide National Park and the Municipality of Guía de Isora for the logistic support during the survey periods, as well as to Michael Rycroft and two anonymous reviewers whose useful comments and constructive suggestions greatly improved the manuscript.

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  1. Rayco Marrero

    Present address: Laboratorio Nacional de Energia e Geologia (LNEG), Alfragide, 2610-999, Lisbon, Portugal

Authors and Affiliations

  1. Instituto Volcanológico de Canarias (INVOLCAN), 38400, Puerto de la Cruz, Tenerife, Canary Islands, Spain

    Fátima Rodríguez, Nemesio M. Pérez, Eleazar Padrón, Gladys Melián, Pedro A. Hernández, María Asensio-Ramos, Samara Dionis, Gabriel López, Rayco Marrero, Germán D. Padilla & José Barrancos

  2. Environmental Research Division, Instituto Tecnológico y de Energías Renovables (ITER), 38600, Granadilla de Abona, Tenerife, Canary Islands, Spain

    Nemesio M. Pérez, Eleazar Padrón, Gladys Melián, Pedro A. Hernández, Rayco Marrero, Germán D. Padilla & José Barrancos

  3. EurGeol, La Esperanza 2, pta 9, 21200, Aracena, Huelva, Spain

    Raúl Hidalgo

  4. Agencia Insular de Energía de Tenerife (AIET), 38600, Granadilla de Abona, Tenerife, Canary Islands, Spain

    Nemesio M. Pérez, Eleazar Padrón, Gladys Melián & Pedro A. Hernández

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  1. Fátima Rodríguez
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Correspondence to Fátima Rodríguez.

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Rodríguez, F., Pérez, N.M., Padrón, E. et al. Diffuse Helium and Hydrogen Degassing to Reveal Hidden Geothermal Resources in Oceanic Volcanic Islands: The Canarian Archipelago Case Study. Surv Geophys 36, 351–369 (2015). https://doi.org/10.1007/s10712-015-9320-8

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