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https://doi.org/10.5194/se-2020-70
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-2020-70
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 08 May 2020

Submitted as: research article | 08 May 2020

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A revised version of this preprint is currently under review for the journal SE.

Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees

Stefano Tavani1, Pablo Granado2, Amerigo Corradetti3, Thomas Seers3, and Josep Anton Muñoz2 Stefano Tavani et al.
  • 1DISTAR, Università degli Studi di Napoli “Federico II”, Via Cupa Nuova Cintia 21, 80126, Naples, Italy
  • 2Institut de Recerca Geomodels, Departament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, C/Martí i Franques s/n, 08028, Barcelona, Spain
  • 3Department of Petroleum Engineering, Texas A&M University at Qatar. Education City, PO Box 23874, Doha, Qatar

Abstract. Joint systems in the eastern portion of the Ebro Basin of the eastern Pyrenees enjoy near continuous exposure from the frontal portion of the belt up to the external portion of its associated foredeep. Utilizing orthophoto mosaics of these world class exposures, we have manually digitized over 30 000 joints within a 16 × 50 km study area. The mapped traces exhibit orientations that are dominantly perpendicular to the trend of the belt (transverse) and, subordinately, orthogonal to it (longitudinal). In particular, joints systematically orient perpendicular to the trend of the belt both in the frontal folds and in the inner and central portion of the foredeep basin. Longitudinal joints occur rarely, with a disordered spatial distribution, exhibiting null difference in abundance between the belt and the foredeep. Joint orientations in the external portion of the foredeep become less clustered, with adjacent areas dominated by either transverse or oblique joints. Our data indicates that joints in the studied area formed in the foredeep in response to a foredeep-parallel stretching, which becomes progressively less intense within the external portion of the foredeep. There, the minimum stress direction becomes more variable, evidencing poor contribution of the forebulge-perpendicular stretching on stress organization.

Stefano Tavani et al.

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Stefano Tavani et al.

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Latest update: 11 Jul 2020
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Short summary
Using orthophotos we have manually digitized 30 000 joints in the eastern Ebro Basin of the Pyrenees. Joints are perpendicular to the belt both in the frontal portion of the belt and in the inner and central portion of the foredeep basin. Joint orientations in the external portion of the foredeep become less clustered. Joints in the studied area formed in the foredeep in response to foredeep-parallel stretching, which becomes progressively less intense within the external portion of the foredeep.
Using orthophotos we have manually digitized 30 000 joints in the eastern Ebro Basin of the...
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