2026-09-14T06:54:48Zhttps://gredos.usal.es/oai/requestoai:gredos.usal.es:10366/1699282026-02-21T01:01:16Zcom_10366_138651com_10366_4512com_10366_3823com_10366_4128com_10366_4055com_10366_3946col_10366_138661col_10366_4129
Gestión del Repositorio Documental de la Universidad de Salamanca
author
Santamaría-Barragán, Alberto
author
Calvín, Pablo
author
Bentué Lalueza, Lorena
author
Casas Sainz, Antonio
2026-02-20T08:34:13Z
2026-02-20T08:34:13Z
2026
Santamaría Barragán, A., Calvín, P., Bentué Lalueza, L., & Casas Sainz, A. (2026). Fracture-controlled water flow in a granitic, high-mountain aquifer: the Panticosa massif (Axial Zone, Pyrenees). Journal of the Geological Society, 183(2). https://doi.org/10.1144/jgs2025-112
0016-7649
http://hdl.handle.net/10366/169928
10.1144/jgs2025-112
2041-479X
[EN]The detailed analysis of the fracture geometry in the Panticosa granitoid (Axial Zone, Pyrenees) highlights the key role of structural analysis studies in characterizing water flow within fractured aquifers. Several fracture sets (striking ENE–WSW, NW–SE and north–south) were identified through photogrammetry (with nearly 30 000 mapped fractures) and fieldwork. A hierarchical classification of the fracture systems was established based on their continuity along-strike. The most prominent set, comprising individual faults that extend over several kilometres and exhibiting normal displacements of 10–50 m, also coincides with the dominant ENE–WSW orientation observed across multiple scales. These large, continuous structures probably result from recent tectonic activity or gravitational collapse. A second-order system includes NE–SW and NW–SE fractures ranging from metres to hundreds of metres in length. The distribution of the third-order set is more scattered and links longer fractures. Additionally, a set of dykes (mostly west–east striking) displays discontinuity contacts with the granite. We interpret that the studied fault sets are responsible for the upflow of thermal water (c. 45°C at the sources) of the deep aquifer from depths of 2 km. The higher continuity and transmissivity of the recent ENE–WSW fault system (showing thicker fault zones) made them more relevant for conditioning water flow.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Panticosa Massif
Pyrenees
Geothermal resources
Granites
Fracture analysis
Fracture-controlled water flow in a granitic, high-mountain aquifer: the Panticosa massif (Axial Zone, Pyrenees)
info:eu-repo/semantics/article
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URL
https://gredos.usal.es/bitstream/10366/169928/1/santamar%c3%ada-barrag%c3%a1n-et-al-2026-fracture-controlled-water-flow-in-a-granitic-high-mountain-aquifer-the-panticosa-massif.pdf
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santamaría-barragán-et-al-2026-fracture-controlled-water-flow-in-a-granitic-high-mountain-aquifer-the-panticosa-massif.pdf
URL
https://gredos.usal.es/bitstream/10366/169928/4/santamar%c3%ada-barrag%c3%a1n-et-al-2026-fracture-controlled-water-flow-in-a-granitic-high-mountain-aquifer-the-panticosa-massif.pdf.txt
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santamaría-barragán-et-al-2026-fracture-controlled-water-flow-in-a-granitic-high-mountain-aquifer-the-panticosa-massif.pdf.txt