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Spatio-temporal variation of fluid flow behavior along a fold: The Bóixols-Sant Corneli anticline (Southern Pyrenees) from U–Pb dating and structural, petrographic and geochemical constraints

Muñoz-López, Daniel and Cruset, David and Vergés, Jaume and Cantarero, Irene and Benedicto, Antonio and Mangenot, Xavier and Albert, Richard and Gerdes, Axel and Beranoaguirre, Aratz and Travé, Anna (2022) Spatio-temporal variation of fluid flow behavior along a fold: The Bóixols-Sant Corneli anticline (Southern Pyrenees) from U–Pb dating and structural, petrographic and geochemical constraints. Marine and Petroleum Geology, 143 . Art. No. 105788. ISSN 0264-8172. doi:10.1016/j.marpetgeo.2022.105788.

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This study integrates field structural data, petrographic and geochemical (δ¹⁸O, δ¹³C, Δ₄₇, ⁸⁷Sr/⁸⁶Sr, and elemental composition) analyses and U–Pb dating of calcite veins cutting the Bóixols-Sant Corneli anticline (Southern Pyrenees) in order to date and to investigate the spatio-temporal relationships between fluid flow and fold evolution. This E-W trending anticline grew from Late Cretaceous to Paleocene at the front of the Bóixols thrust sheet deforming pre-growth and growth sedimentary sequences. U–Pb dating reveals Late Cretaceous to late Miocene deformation ages, which agree with the age of growth strata deposition and the sequence of deformation interpreted from field and microstructural data. Dates coeval (71.2 ± 6.4 to 56.9 ± 1.4 Ma) and postdating (55.5 ± 1.2 to 27.4 ± 0.9 Ma) Upper Cretaceous to Paleocene growth strata are interpreted to record: (i) the growth of the Bóixols-Sant Corneli anticline during the Bóixols thrust emplacement, and (ii) the tightening of the anticline during the southern tectonic transport of the South-Central Pyrenean Unit. Other ages (20.8 ± 1.2 to 9.0 ± 4.6 Ma) postdate the folding event and have been associated with the collapse of the Bóixols-Sant Corneli anticline. The geochemistry of calcite veins indicates that the fluid flow behavior varied across the Bóixols-Sant Corneli anticline through its growth, showing a compartmentalized fluid system. In the hinge of the anticline and in the upper Santonian to middle Campanian syn-orogenic sequence along the footwall of the Bóixols thrust, the similar petrographic and geochemical features between all calcite cements and host rocks point towards a locally-derived or well-equilibrated fluid system. Contrarily, along large faults such as the Bóixols thrust, and in the anticline limbs, the geochemistry of vein cements indicates a different scenario. Cements in large faults yielded the lightest δ¹⁸O values, from −8 to −14 ‰VPDB, and variable enrichment in δ¹³C, ⁸⁷Sr/⁸⁶Sr, elemental composition and δ¹⁸O_(fluid). This is interpreted as the migration of fluids, through fault zones, that evolved from distinct fluid origins. Cements in the fold limbs exhibit δ¹⁸O and δ¹³C between −8 and −6 ‰VPDB and between −10 and + 2 ‰VPDB, respectively, the lowest Sr contents and the lowest precipitation temperatures, suggesting that the anticline limbs recorded the infiltration and evolution of meteoric waters. The paleohydrological system in the Bóixols-Sant Corneli anticline was restricted to the Bóixols thrust sheet. The Upper Triassic evaporitic basal detachment likely acted as a lower fluid barrier, preventing the input of fluids from deeper parts of the Pyrenean crustal thrust system. This study provides a well-constrained absolute timing of fracturing and fluid flow during basin inversion and folding evolution and highlights the suitability of U–Pb geochronology to refine the age of fractures and veins and their sequential evolution in orogenic belts.

Item Type:Article
Related URLs:
URLURL TypeDescription
Muñoz-López, Daniel0000-0003-2615-4166
Cruset, David0000-0003-3683-5125
Vergés, Jaume0000-0002-4467-5291
Cantarero, Irene0000-0001-5744-6773
Benedicto, Antonio0000-0002-8222-2744
Mangenot, Xavier0000-0001-8770-6767
Gerdes, Axel0000-0003-3823-2125
Beranoaguirre, Aratz0000-0002-1137-6498
Travé, Anna0000-0002-2735-3733
Additional Information:© 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license ( Received 2 February 2022, Revised 7 June 2022, Accepted 9 June 2022, Available online 13 June 2022. We thank Olivier Lacombe and another anonymous referee for their constructive and detailed reviews, which helped improve the quality of the manuscript. We also thank the excellent editorial guidance of Juliette Lamarche and Massimo Zecchin. This research was carried out within the framework of the DGICYT Spanish project PGC2018-093903-B-C22 (Ministerio de Ciencia, Innovación y Universidades/Agencia Estatal de Investigación/10.13039/501100011033/Fondo Europeo de Desarrollo Regional, Unión Europea), the Grup Consolidat de Recerca “Geologia Sedimentària” (2017-SGR-824) and the Grup Consolidat de Recerca “Modelització Geodinàmica de la Litosfera” (2017SGR-847). This work was also partially funded by ALORBE project (PIE–CSIC–202030E310). The PhD research of DML is supported by the FPI2016 (BES-2016-077214) Spanish program from MINECO. DC acknowledges the Spanish Ministry of Science and Innovation for the “Juan de la Cierva Formación” fellowship FJC2020-043488-I AEI/10.113039/501100011033. We thank Luis Fernando Martínez for helping in the fieldwork during his master's degree at the Universitat de Barcelona. Carbon and oxygen isotopic analyses were carried out at the Centre Científics i Tecnològics of the Universitat de Barcelona. Strontium analyses were performed at the CAI de Geocronología y Geoquímica Isotópica of the Universidad Complutense de Madrid. The elemental composition was analyzed at the geochemistry facility labGEOTOP of Geosciences Barcelona (GEO3BCN–CSIC). U–Pb analyses were performed at the Frankfurt Isotope and Element Research Center (FIERCE) from the Goethe-University Frankfurt (Germany). The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding AgencyGrant Number
Ministerio de Ciencia, Innovación y Universidades (MCIU)PGC2018-093903-B-C22
Ministerio de Ciencia, Innovación y Universidades (MCIU)2017-SGR-824
Ministerio de Ciencia, Innovación y Universidades (MCIU)2017SGR-847
Ministerio de Economía, Industria y Competitividad (MINECO)PIE-CSIC-202030E310
Ministerio de Economía, Industria y Competitividad (MINECO)BES-2016-077214
Ministerio de Ciencia e Innovación (MICINN)FJC2020-043488-I AEI/10.113039/501100011033
Subject Keywords:Fluid flow; Fractures; Calcite veins; U–Pb dating; Bóixols-sant corneli anticline; Bóixols thrust sheet; Southern pyrenees
Record Number:CaltechAUTHORS:20220614-481810000
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Official Citation:Daniel Muñoz-López, David Cruset, Jaume Vergés, Irene Cantarero, Antonio Benedicto, Xavier Mangenot, Richard Albert, Axel Gerdes, Aratz Beranoaguirre, Anna Travé, Spatio-temporal variation of fluid flow behavior along a fold: The Bóixols-Sant Corneli anticline (Southern Pyrenees) from U–Pb dating and structural, petrographic and geochemical constraints, Marine and Petroleum Geology, Volume 143, 2022, 105788, ISSN 0264-8172,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115160
Deposited By: George Porter
Deposited On:15 Jun 2022 17:32
Last Modified:30 Jun 2022 16:57

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