Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees
<p>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 o...
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doaj-c98ce10192b04bd2bae67dd607ef67342020-11-25T03:18:30ZengCopernicus PublicationsSolid Earth1869-95101869-95292020-09-01111643165110.5194/se-11-1643-2020Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern PyreneesS. Tavani0P. Granado1A. Corradetti2T. Seers3J. M. Casas4J. A. Muñoz5DiSTAR, Università degli Studi di Napoli “Federico II”, Via Cupa Nuova Cintia 21, 80126, Naples, ItalyInstitut de Recerca Geomodels, Departament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, C/Martí i Franquès s/n 08028, Barcelona, SpainDepartment of Petroleum Engineering, Texas A&M University at Qatar, Education City, P.O. Box 23874, Doha, QatarDepartment of Petroleum Engineering, Texas A&M University at Qatar, Education City, P.O. Box 23874, Doha, QatarDepartament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, C/Martí i Franquès s/n, 08028, Barcelona, SpainInstitut de Recerca Geomodels, Departament de Dinàmica de la Terra i de l'Oceà, Universitat de Barcelona, C/Martí i Franquès s/n 08028, Barcelona, Spain<p>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 km<span class="inline-formula">×50</span> km study area. The mapped traces exhibit orientations that are dominantly perpendicular to the trend of the belt (transverse) and, subordinately, parallel to the belt (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 indicate 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, providing evidence of the poor contribution of the forebulge-perpendicular stretching on stress organization.</p>https://se.copernicus.org/articles/11/1643/2020/se-11-1643-2020.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
S. Tavani P. Granado A. Corradetti T. Seers J. M. Casas J. A. Muñoz |
spellingShingle |
S. Tavani P. Granado A. Corradetti T. Seers J. M. Casas J. A. Muñoz Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees Solid Earth |
author_facet |
S. Tavani P. Granado A. Corradetti T. Seers J. M. Casas J. A. Muñoz |
author_sort |
S. Tavani |
title |
Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees |
title_short |
Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees |
title_full |
Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees |
title_fullStr |
Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees |
title_full_unstemmed |
Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees |
title_sort |
transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern pyrenees |
publisher |
Copernicus Publications |
series |
Solid Earth |
issn |
1869-9510 1869-9529 |
publishDate |
2020-09-01 |
description |
<p>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 km<span class="inline-formula">×50</span> km study area. The mapped traces exhibit
orientations that are dominantly perpendicular to the trend of the belt
(transverse) and, subordinately, parallel to the belt (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 indicate 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, providing evidence of the poor
contribution of the forebulge-perpendicular stretching on stress
organization.</p> |
url |
https://se.copernicus.org/articles/11/1643/2020/se-11-1643-2020.pdf |
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