Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba
The sedimentary rocks intercalated in volcanic and metavolcanic sections of Mayarí-Baracoa and Sierra del Purial Mountains (Eastern Cuba), yielded Cretaceous through Danian microfossils. In the Mayarí Mountains the Téneme Fm consists of basalts and hyaloclastites with minor intercalations of well-be...
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ftraco:oai:raco.cat:article/82392 2023-05-15T18:01:08+02:00 Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba Iturralde-Vinent, Manuel A. Díaz-Otero, Consuelo Rodríguez Vega, Antonio Díaz-Martínez, Roberto 2006-01-11 text/html application/pdf http://www.raco.cat/index.php/GeologicaActa/article/view/82392 cat cat Universitat de Barcelona http://www.raco.cat/index.php/GeologicaActa/article/view/82392/107036 http://www.raco.cat/index.php/GeologicaActa/article/view/82392/107496 Geologica Acta; 2006: Vol.: 4 Núm.: 1-2; 89 info:eu-repo/semantics/article Article revisat per persones expertes info:eu-repo/semantics/publishedVersion 2006 ftraco 2014-03-19T00:59:46Z The sedimentary rocks intercalated in volcanic and metavolcanic sections of Mayarí-Baracoa and Sierra del Purial Mountains (Eastern Cuba), yielded Cretaceous through Danian microfossils. In the Mayarí Mountains the Téneme Fm consists of basalts and hyaloclastites with minor intercalations of well-bedded foliated limestone and shaly limestone that in the type area contain a Turonian or early Coniacian planktonic foraminifera assemblage. In the Morel area (Moa-Baracoa massif), back-arc pillow basalts with ribbon cherts include a late Turonian or Coniacian limestone bed intercalated with interbedded organic-rich calcareous shales near the top. The upper part of the Coniacian (?)-Campanian Santo Domingo Fm crops out west of Moa and it consists of finegrained well-bedded volcaniclastic rocks with two intercalated lenses of coarse-grained impure biocalcirudites to biocalcarenites. These rocks yielded a mixed penecontemporaneous planktonic and benthonic microfossil assemblage attributed to the lower part of the late Campanian (Globotruncanita calcarata Zone). At Sierra del Purial, crystalline limestones embedded within the metavulcano-sedimentary Río Baracoa section (Purial metamorphic complex) yielded Campanian microfossils. The Maastrichtian Yaguaneque (=Cañas) limestones crop out extensively in both Mayarí-Baracoa and Purial Mountains. All the formations previously mentioned unconformably overlie and tectonically intermingle with the late Maastrichtian-early Danian clastic rocks of the Mícara and La Picota Fms. Our new dates demonstrate that in the Greater Antilles the PIA (Primitive Island Arc-tholeiite) recorded by the Téneme Fm would be Late Cretaceous in age in opposition to the Lower Cretaceous age proposed for the PIA basalts. The protolith of the Purial metamorphic complex is probably Maastrichtian-early Danian, but certainly Campanian and older in age. This fact suggests that the metamorphism that affected the Purial rocks took place probably in the late Maastrichtian and was coeval with the detachment, exhumation and emplacement of mafic-ultramafic thrust-sheet bodies. This event recorded in Eastern Cuba/Western Hispaniola and Guatemala might have been related to the insertion of thick oceanic ridges into the subduction zone. Article in Journal/Newspaper Planktonic foraminifera RACO: Revistes Catalanes amb Accés Obert |
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RACO: Revistes Catalanes amb Accés Obert |
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Catalan |
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The sedimentary rocks intercalated in volcanic and metavolcanic sections of Mayarí-Baracoa and Sierra del Purial Mountains (Eastern Cuba), yielded Cretaceous through Danian microfossils. In the Mayarí Mountains the Téneme Fm consists of basalts and hyaloclastites with minor intercalations of well-bedded foliated limestone and shaly limestone that in the type area contain a Turonian or early Coniacian planktonic foraminifera assemblage. In the Morel area (Moa-Baracoa massif), back-arc pillow basalts with ribbon cherts include a late Turonian or Coniacian limestone bed intercalated with interbedded organic-rich calcareous shales near the top. The upper part of the Coniacian (?)-Campanian Santo Domingo Fm crops out west of Moa and it consists of finegrained well-bedded volcaniclastic rocks with two intercalated lenses of coarse-grained impure biocalcirudites to biocalcarenites. These rocks yielded a mixed penecontemporaneous planktonic and benthonic microfossil assemblage attributed to the lower part of the late Campanian (Globotruncanita calcarata Zone). At Sierra del Purial, crystalline limestones embedded within the metavulcano-sedimentary Río Baracoa section (Purial metamorphic complex) yielded Campanian microfossils. The Maastrichtian Yaguaneque (=Cañas) limestones crop out extensively in both Mayarí-Baracoa and Purial Mountains. All the formations previously mentioned unconformably overlie and tectonically intermingle with the late Maastrichtian-early Danian clastic rocks of the Mícara and La Picota Fms. Our new dates demonstrate that in the Greater Antilles the PIA (Primitive Island Arc-tholeiite) recorded by the Téneme Fm would be Late Cretaceous in age in opposition to the Lower Cretaceous age proposed for the PIA basalts. The protolith of the Purial metamorphic complex is probably Maastrichtian-early Danian, but certainly Campanian and older in age. This fact suggests that the metamorphism that affected the Purial rocks took place probably in the late Maastrichtian and was coeval with the detachment, exhumation and emplacement of mafic-ultramafic thrust-sheet bodies. This event recorded in Eastern Cuba/Western Hispaniola and Guatemala might have been related to the insertion of thick oceanic ridges into the subduction zone. |
format |
Article in Journal/Newspaper |
author |
Iturralde-Vinent, Manuel A. Díaz-Otero, Consuelo Rodríguez Vega, Antonio Díaz-Martínez, Roberto |
spellingShingle |
Iturralde-Vinent, Manuel A. Díaz-Otero, Consuelo Rodríguez Vega, Antonio Díaz-Martínez, Roberto Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba |
author_facet |
Iturralde-Vinent, Manuel A. Díaz-Otero, Consuelo Rodríguez Vega, Antonio Díaz-Martínez, Roberto |
author_sort |
Iturralde-Vinent, Manuel A. |
title |
Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba |
title_short |
Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba |
title_full |
Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba |
title_fullStr |
Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba |
title_full_unstemmed |
Tectonic implications of paleontologic dating of Cretaceous-Danian sections of Eastern Cuba |
title_sort |
tectonic implications of paleontologic dating of cretaceous-danian sections of eastern cuba |
publisher |
Universitat de Barcelona |
publishDate |
2006 |
url |
http://www.raco.cat/index.php/GeologicaActa/article/view/82392 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Geologica Acta; 2006: Vol.: 4 Núm.: 1-2; 89 |
op_relation |
http://www.raco.cat/index.php/GeologicaActa/article/view/82392/107036 http://www.raco.cat/index.php/GeologicaActa/article/view/82392/107496 |
_version_ |
1766170478725038080 |