Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province
International audience The Tireo Group in the eastern Central Cordillera (Dominican Republic) is part of the Jarabacoa Block, composed of a Pacific-type Jurassic ocean floor (Loma La Monja, overlain by the El Aguacate ribbon Chert), intruded and overlain by an early CLIP (Carribean Large Igneous Pro...
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ftunivnantes:oai:HAL:hal-01380981v1 2023-05-15T18:01:10+02:00 Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province Sandoval, M. Isabel Baumgartner, Peter O. Escuder-Viruete, J. Gabites, J. Mercier de Lépinay, Bernard Institut des Sciences de la Terre Université de Lausanne = University of Lausanne (UNIL) Instituto Geológico y Minero de España (IGME) Pacific Center for Isotopic and Geochemical Research Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) 2015-04 https://hal.archives-ouvertes.fr/hal-01380981 https://doi.org/10.1016/j.revmic.2015.02.002 en eng HAL CCSD Elsevier Masson info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revmic.2015.02.002 hal-01380981 https://hal.archives-ouvertes.fr/hal-01380981 doi:10.1016/j.revmic.2015.02.002 ISSN: 0035-1598 Revue de Micropaléontologie https://hal.archives-ouvertes.fr/hal-01380981 Revue de Micropaléontologie, Elsevier Masson, 2015, 58 (2), pp.85 - 106. ⟨10.1016/j.revmic.2015.02.002⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1016/j.revmic.2015.02.002 2022-09-07T00:25:30Z International audience The Tireo Group in the eastern Central Cordillera (Dominican Republic) is part of the Jarabacoa Block, composed of a Pacific-type Jurassic ocean floor (Loma La Monja, overlain by the El Aguacate ribbon Chert), intruded and overlain by an early CLIP (Carribean Large Igneous Province)-type plateau, the Duarte Complex, which is in turn unconformably overlain by arc-type rocks of the Tireo Group. This group exhibits a 3-km thick sequence of arc-related volcanic and volcano-sedimentary rocks, including tuffaceous chert and mudstone studied for radiolarians in this paper. The Siete Cabezas Formation, considered to be the last Campanian–Maastrichtian CLIP-type volcano-sedimentary sequence, overlies the Tireo Group. A controversy about earlier radiolarian dating of the Tireo Group, considered until now as part of the Siete Cabezas Formation, encouraged us to study a well-exposed section located 3 km NE of Pedro Brand village. Seven samples of laminated siliceous mudstones and cherts yielded around 40 common and well-preserved radiolarian taxa. Based on maximum ranges of taxa published in several regional zonations and on a comparison with a Turonian–Coniacian sample calibrated by planktonic foraminifera (the Deva Beds from Romania), we determine a Turonian–Coniacian age for the Pedro Brand section. A 40Ar–39Ar whole rock age of 75.1 ± 1.1 Ma, obtained in a basalt dyke crosscutting the radiolarian bearing rocks, provides a Late Campanian consistent minimum age for the pelagic–hemipelagic Pedro Brand section. Including the re-interpretation of earlier radiolarian work, we conclude that the studied rocks of the Tireo Group are older than the Maastrichtian 40Ar–39Ar ages on plagioclase of the Siete Cabezas Formation. The studied dyke in the Pedro Brand section geochemically resembles the overlying Siete Cabezas and Pico Duarte basalts and could be a feeder dyke of those. However, a tectonic superposition of the Siete Cabezas cannot be excluded, since earlier 40K–40Ar basalt ages of this unit are ... Article in Journal/Newspaper Planktonic foraminifera Université de Nantes: HAL-UNIV-NANTES Duarte ENVELOPE(-60.950,-60.950,-64.200,-64.200) Loma ENVELOPE(-58.983,-58.983,-62.267,-62.267) Pacific Revue de Micropaléontologie 58 2 85 106 |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Sandoval, M. Isabel Baumgartner, Peter O. Escuder-Viruete, J. Gabites, J. Mercier de Lépinay, Bernard Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The Tireo Group in the eastern Central Cordillera (Dominican Republic) is part of the Jarabacoa Block, composed of a Pacific-type Jurassic ocean floor (Loma La Monja, overlain by the El Aguacate ribbon Chert), intruded and overlain by an early CLIP (Carribean Large Igneous Province)-type plateau, the Duarte Complex, which is in turn unconformably overlain by arc-type rocks of the Tireo Group. This group exhibits a 3-km thick sequence of arc-related volcanic and volcano-sedimentary rocks, including tuffaceous chert and mudstone studied for radiolarians in this paper. The Siete Cabezas Formation, considered to be the last Campanian–Maastrichtian CLIP-type volcano-sedimentary sequence, overlies the Tireo Group. A controversy about earlier radiolarian dating of the Tireo Group, considered until now as part of the Siete Cabezas Formation, encouraged us to study a well-exposed section located 3 km NE of Pedro Brand village. Seven samples of laminated siliceous mudstones and cherts yielded around 40 common and well-preserved radiolarian taxa. Based on maximum ranges of taxa published in several regional zonations and on a comparison with a Turonian–Coniacian sample calibrated by planktonic foraminifera (the Deva Beds from Romania), we determine a Turonian–Coniacian age for the Pedro Brand section. A 40Ar–39Ar whole rock age of 75.1 ± 1.1 Ma, obtained in a basalt dyke crosscutting the radiolarian bearing rocks, provides a Late Campanian consistent minimum age for the pelagic–hemipelagic Pedro Brand section. Including the re-interpretation of earlier radiolarian work, we conclude that the studied rocks of the Tireo Group are older than the Maastrichtian 40Ar–39Ar ages on plagioclase of the Siete Cabezas Formation. The studied dyke in the Pedro Brand section geochemically resembles the overlying Siete Cabezas and Pico Duarte basalts and could be a feeder dyke of those. However, a tectonic superposition of the Siete Cabezas cannot be excluded, since earlier 40K–40Ar basalt ages of this unit are ... |
author2 |
Institut des Sciences de la Terre Université de Lausanne = University of Lausanne (UNIL) Instituto Geológico y Minero de España (IGME) Pacific Center for Isotopic and Geochemical Research Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) |
format |
Article in Journal/Newspaper |
author |
Sandoval, M. Isabel Baumgartner, Peter O. Escuder-Viruete, J. Gabites, J. Mercier de Lépinay, Bernard |
author_facet |
Sandoval, M. Isabel Baumgartner, Peter O. Escuder-Viruete, J. Gabites, J. Mercier de Lépinay, Bernard |
author_sort |
Sandoval, M. Isabel |
title |
Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province |
title_short |
Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province |
title_full |
Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province |
title_fullStr |
Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province |
title_full_unstemmed |
Late Cretaceous radiolarian biochronology of the Pedro Brand section, Tireo Group, eastern Central Cordillera, Dominican Republic: A contribution to the stratigraphy of the Caribbean Large Igneous Province |
title_sort |
late cretaceous radiolarian biochronology of the pedro brand section, tireo group, eastern central cordillera, dominican republic: a contribution to the stratigraphy of the caribbean large igneous province |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01380981 https://doi.org/10.1016/j.revmic.2015.02.002 |
long_lat |
ENVELOPE(-60.950,-60.950,-64.200,-64.200) ENVELOPE(-58.983,-58.983,-62.267,-62.267) |
geographic |
Duarte Loma Pacific |
geographic_facet |
Duarte Loma Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 0035-1598 Revue de Micropaléontologie https://hal.archives-ouvertes.fr/hal-01380981 Revue de Micropaléontologie, Elsevier Masson, 2015, 58 (2), pp.85 - 106. ⟨10.1016/j.revmic.2015.02.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revmic.2015.02.002 hal-01380981 https://hal.archives-ouvertes.fr/hal-01380981 doi:10.1016/j.revmic.2015.02.002 |
op_doi |
https://doi.org/10.1016/j.revmic.2015.02.002 |
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Revue de Micropaléontologie |
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58 |
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