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Volume 7, issue 3
Solid Earth, 7, 827-841, 2016
https://doi.org/10.5194/se-7-827-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: From orogenesis to geoscience in the service of society: the...

Solid Earth, 7, 827-841, 2016
https://doi.org/10.5194/se-7-827-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 24 May 2016

Research article | 24 May 2016

Basement structure of the Hontomín CO2 storage site (Spain) determined by integration of microgravity and 3-D seismic data

Juvenal Andrés1,3, Juan Alcalde2, Puy Ayarza1, Eduard Saura3, Ignacio Marzán3, David Martí3, José Ramón Martínez Catalán1, Ramón Carbonell3, Andrés Pérez-Estaún2, José Luis García-Lobón4, and Félix Manuel Rubio4 Juvenal Andrés et al.
  • 1Departamento de Geología, Universidad de Salamanca, Salamanca, Spain
  • 2Department of Geology and Petroleum Geology, University of Aberdeen, UK
  • 3Instituto de Ciencias de la Tierra “Jaume Almera” ICTJA-CSIC, Spain
  • 4Instituto Geológico y Minero de España – IGME, Spain

Abstract. A multidisciplinary study has been carried out in Hontomín (Spain) to determine the basement structural setting, its geometry and the geometry of the sedimentary succession of an area aimed to be the first Spanish pilot plant for CO2 storage. An integration of coincident 3-D seismic results, borehole data and unpublished microgravity data were used to reproduce the deep structure and topography of the basement and to quantify the thickness of the Triassic Keuper evaporites. The subsurface structure is characterized by a half-graben setting filled with Keuper evaporites (up to 2000m thick), forming an extensional forced fold. All data sets clearly identify two main fault systems, compartmentalizing the main structural domain into three differentiated blocks. These faults have been interpreted to be reactivated normal faults that have led to the formation of the Hontomín dome.

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