U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation
The provenance of the Permo-Triassic series of the Talayuelas anticline (Iberian Ranges) have been studied using UPb geochronology (laser ablation inductively coupled plasma mass spectrometry) of detrital zircons. These intracontinental siliciclastic series were formed by extensive sandy braided flu...
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University of Chicago Press
2012
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Online Access: | http://hdl.handle.net/10261/48414 https://doi.org/10.1086/663983 |
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ftcsic:oai:digital.csic.es:10261/48414 2024-02-11T10:06:42+01:00 U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation Sánchez Martínez, S. Horra, Raúl de la Arenas, Ricardo Gerdes, A. Galán, A. B. López-Gómez, José Barrenechea, J. F. Arche, Alfredo 2012-03 http://hdl.handle.net/10261/48414 https://doi.org/10.1086/663983 en eng University of Chicago Press http://dx.doi.org/10.1086/663983 Journal of Geology, 2012, 120(2), March : 135-154 0022-1376 http://hdl.handle.net/10261/48414 doi:10.1086/663983 open eolian deposit fluvial deposit geochronology Hercynian orogeny lacustrine deposit Permian-Triassic boundary provenance rift zone sedimentary basin uranium-lead dating zircon Iberian Cordillera artículo http://purl.org/coar/resource_type/c_6501 2012 ftcsic https://doi.org/10.1086/663983 2024-01-16T09:37:15Z The provenance of the Permo-Triassic series of the Talayuelas anticline (Iberian Ranges) have been studied using UPb geochronology (laser ablation inductively coupled plasma mass spectrometry) of detrital zircons. These intracontinental siliciclastic series were formed by extensive sandy braided fluvial systems associated with ephemeral lake deposits and aeolian sediments, with paleocurrents suggesting constant NW-SE transport directions. Upper Permian reddish sandstones from the Upper Alcotas Formation (Lopingian) contain a dominant Variscan zircon population (290-360 Ma), which indicates source areas located in the axial zone of the Variscan belt, in the core of the Ibero-Armorican arc. However, in the Lower Triassic sandstones of the Can ̃izar Formation (Olenekian), the Variscan zircon population is almost completely replaced by Cadomian zircons (520-750 Ma), with important Avalonian (390-520 Ma), Mesoproterozoic (900-1750 Ma), Eburnian (1.78-2.35 Ga), and post-Eburnian and Archaean (>12.4 Ga) zircon populations. This detrital zircon content now suggests source areas located more to the NW, in the Avalonian microcontinent, although a limited supply coming from the southern part of Laurentia cannot be ruled out. Finally, in the Middle Triassic (Anisian), the source areas returned to the Variscan axial zone, since the Variscan zircon population is again highly dominant during this period. The changes detected in the source areas of the Permo-Triassic series are related to the development and propagation of the Iberian rift, one of the large extensional structures that determined the generation of the sedimentary basins and finally caused the breakup of Pangea. The methodology followed in this article is very useful to understand the generation and evolution of these intracontinental basins and also the relationships between the different rift systems generated in the North Atlantic realm during the Permo-Triassic times. Peer reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) The Journal of Geology 120 2 135 154 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
eolian deposit fluvial deposit geochronology Hercynian orogeny lacustrine deposit Permian-Triassic boundary provenance rift zone sedimentary basin uranium-lead dating zircon Iberian Cordillera |
spellingShingle |
eolian deposit fluvial deposit geochronology Hercynian orogeny lacustrine deposit Permian-Triassic boundary provenance rift zone sedimentary basin uranium-lead dating zircon Iberian Cordillera Sánchez Martínez, S. Horra, Raúl de la Arenas, Ricardo Gerdes, A. Galán, A. B. López-Gómez, José Barrenechea, J. F. Arche, Alfredo U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation |
topic_facet |
eolian deposit fluvial deposit geochronology Hercynian orogeny lacustrine deposit Permian-Triassic boundary provenance rift zone sedimentary basin uranium-lead dating zircon Iberian Cordillera |
description |
The provenance of the Permo-Triassic series of the Talayuelas anticline (Iberian Ranges) have been studied using UPb geochronology (laser ablation inductively coupled plasma mass spectrometry) of detrital zircons. These intracontinental siliciclastic series were formed by extensive sandy braided fluvial systems associated with ephemeral lake deposits and aeolian sediments, with paleocurrents suggesting constant NW-SE transport directions. Upper Permian reddish sandstones from the Upper Alcotas Formation (Lopingian) contain a dominant Variscan zircon population (290-360 Ma), which indicates source areas located in the axial zone of the Variscan belt, in the core of the Ibero-Armorican arc. However, in the Lower Triassic sandstones of the Can ̃izar Formation (Olenekian), the Variscan zircon population is almost completely replaced by Cadomian zircons (520-750 Ma), with important Avalonian (390-520 Ma), Mesoproterozoic (900-1750 Ma), Eburnian (1.78-2.35 Ga), and post-Eburnian and Archaean (>12.4 Ga) zircon populations. This detrital zircon content now suggests source areas located more to the NW, in the Avalonian microcontinent, although a limited supply coming from the southern part of Laurentia cannot be ruled out. Finally, in the Middle Triassic (Anisian), the source areas returned to the Variscan axial zone, since the Variscan zircon population is again highly dominant during this period. The changes detected in the source areas of the Permo-Triassic series are related to the development and propagation of the Iberian rift, one of the large extensional structures that determined the generation of the sedimentary basins and finally caused the breakup of Pangea. The methodology followed in this article is very useful to understand the generation and evolution of these intracontinental basins and also the relationships between the different rift systems generated in the North Atlantic realm during the Permo-Triassic times. Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Sánchez Martínez, S. Horra, Raúl de la Arenas, Ricardo Gerdes, A. Galán, A. B. López-Gómez, José Barrenechea, J. F. Arche, Alfredo |
author_facet |
Sánchez Martínez, S. Horra, Raúl de la Arenas, Ricardo Gerdes, A. Galán, A. B. López-Gómez, José Barrenechea, J. F. Arche, Alfredo |
author_sort |
Sánchez Martínez, S. |
title |
U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation |
title_short |
U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation |
title_full |
U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation |
title_fullStr |
U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation |
title_full_unstemmed |
U-Pb ages of detrital zircons from the Permo-Triassic series of the Iberian Ranges: A record of variable provenance during rift propagation |
title_sort |
u-pb ages of detrital zircons from the permo-triassic series of the iberian ranges: a record of variable provenance during rift propagation |
publisher |
University of Chicago Press |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/48414 https://doi.org/10.1086/663983 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.1086/663983 Journal of Geology, 2012, 120(2), March : 135-154 0022-1376 http://hdl.handle.net/10261/48414 doi:10.1086/663983 |
op_rights |
open |
op_doi |
https://doi.org/10.1086/663983 |
container_title |
The Journal of Geology |
container_volume |
120 |
container_issue |
2 |
container_start_page |
135 |
op_container_end_page |
154 |
_version_ |
1790604587351146496 |