Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela
Ultramafic-mafic rocks of ophiolitic affinity crop out along the Venezuelan Caribbean region. They have been interpreted as remnants of the oceanic lithosphere of the Caribbean volcanic arc (135-70 Ma) as well as relicts of proto-Caribbean oceanic lithosphere (Upper Jurassic-Lower Cretaceous) relate...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/233116 |
| Acceso en línea: | http://hdl.handle.net/10261/233116 |
| Access Level: | acceso abierto |
| Palabra clave: | Ophiolite Chromite deposit Platinum-group elements Caribbean Venezuela Ofiolitas Depósito de cromita Elementos del grupo del platino Caribeño |
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España |
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Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela Petrogénesis del cuerpo de cromitita de la ofiolita del Cerro Colorado, península de Paraguaná, Venezuela |
| title |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela |
| spellingShingle |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela Mendi, David J. Ophiolite Chromite deposit Platinum-group elements Caribbean Venezuela Ofiolitas Depósito de cromita Elementos del grupo del platino Caribeño |
| title_short |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela |
| title_full |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela |
| title_fullStr |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela |
| title_full_unstemmed |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela |
| title_sort |
Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, Venezuela |
| dc.creator.none.fl_str_mv |
Mendi, David J. González-Jiménez, José María Proenza, Joaquín A. Urbani, Franco Gervilla, Fernando |
| author |
Mendi, David J. |
| author_facet |
Mendi, David J. González-Jiménez, José María Proenza, Joaquín A. Urbani, Franco Gervilla, Fernando |
| author_role |
author |
| author2 |
González-Jiménez, José María Proenza, Joaquín A. Urbani, Franco Gervilla, Fernando |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Economía y Competitividad (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Ophiolite Chromite deposit Platinum-group elements Caribbean Venezuela Ofiolitas Depósito de cromita Elementos del grupo del platino Caribeño |
| topic |
Ophiolite Chromite deposit Platinum-group elements Caribbean Venezuela Ofiolitas Depósito de cromita Elementos del grupo del platino Caribeño |
| description |
Ultramafic-mafic rocks of ophiolitic affinity crop out along the Venezuelan Caribbean region. They have been interpreted as remnants of the oceanic lithosphere of the Caribbean volcanic arc (135-70 Ma) as well as relicts of proto-Caribbean oceanic lithosphere (Upper Jurassic-Lower Cretaceous) related to Pangea's break-up. The Cerro Colorado ophiolite, located in the Paraguaná Peninsula, together with the case of the Cordillera de la Costa in north-central Venezuela, are a unique case of these Venezuelan ophiolites containing chromitite bodies. However, the petrogenesis of such a mafic-ultramafic complex and associated chromite ore remains are unknown to date. To advance our understanding of chromite ores in the Caribbean region, the genesis of the Cerro Colorado chromitite body is challenged. The Cerro Colorado chromitite body is characterized by a low-Cr content [Cr# =Cr/ Cr+Al= 0.44-0.60] and a distribution of trace elements in chromite as is typical of high-Al chromitites found in the shallower portions of the petrological Moho Transition Zone of Mesozoic ophiolites. The calculated melts in equilibrium with chromite forming this high-Al chromitite body are back-arc basin basalts. These melts were extracted after ~20 % partial melting of moderately depleted peridotites, which resulted in the precipitation of high-Al chromitite relatively impoverished in PGE (≤ 100 ppb total PGE). A comparison of the geochemical signatures of minor and trace elements in chromite and bulk-PGE contents of the Cerro Colorado chromitite with those of other known chromitites in the peri-Caribbean ophiolites show certain similitude with those high-Al described in the Moa-Baracoa ophiolite in eastern Cuba. The obtained results allow us to suggest that the ultramafic rocks of the Cerro Colorado and the chromitite body associated with it are closely related to the formation of a back-arc basin developed between ca. 125-120 Ma in the rear of the Great Antilles Arc. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 2021 2021 2021 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/233116 |
| url |
http://hdl.handle.net/10261/233116 |
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Inglés |
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Inglés |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Sociedad Geológica Mexicana |
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Sociedad Geológica Mexicana |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula, VenezuelaPetrogénesis del cuerpo de cromitita de la ofiolita del Cerro Colorado, península de Paraguaná, VenezuelaMendi, David J.González-Jiménez, José MaríaProenza, Joaquín A.Urbani, FrancoGervilla, FernandoOphioliteChromite depositPlatinum-group elementsCaribbeanVenezuelaOfiolitasDepósito de cromitaElementos del grupo del platinoCaribeñoUltramafic-mafic rocks of ophiolitic affinity crop out along the Venezuelan Caribbean region. They have been interpreted as remnants of the oceanic lithosphere of the Caribbean volcanic arc (135-70 Ma) as well as relicts of proto-Caribbean oceanic lithosphere (Upper Jurassic-Lower Cretaceous) related to Pangea's break-up. The Cerro Colorado ophiolite, located in the Paraguaná Peninsula, together with the case of the Cordillera de la Costa in north-central Venezuela, are a unique case of these Venezuelan ophiolites containing chromitite bodies. However, the petrogenesis of such a mafic-ultramafic complex and associated chromite ore remains are unknown to date. To advance our understanding of chromite ores in the Caribbean region, the genesis of the Cerro Colorado chromitite body is challenged. The Cerro Colorado chromitite body is characterized by a low-Cr content [Cr# =Cr/ Cr+Al= 0.44-0.60] and a distribution of trace elements in chromite as is typical of high-Al chromitites found in the shallower portions of the petrological Moho Transition Zone of Mesozoic ophiolites. The calculated melts in equilibrium with chromite forming this high-Al chromitite body are back-arc basin basalts. These melts were extracted after ~20 % partial melting of moderately depleted peridotites, which resulted in the precipitation of high-Al chromitite relatively impoverished in PGE (≤ 100 ppb total PGE). A comparison of the geochemical signatures of minor and trace elements in chromite and bulk-PGE contents of the Cerro Colorado chromitite with those of other known chromitites in the peri-Caribbean ophiolites show certain similitude with those high-Al described in the Moa-Baracoa ophiolite in eastern Cuba. The obtained results allow us to suggest that the ultramafic rocks of the Cerro Colorado and the chromitite body associated with it are closely related to the formation of a back-arc basin developed between ca. 125-120 Ma in the rear of the Great Antilles Arc.[ES] El margen caribeño de Venezuela se caracteriza por la presencia de algunos afloramientos de rocas máficas y ultramáficas de afinidad ofiolíca. Dichas rocas se han intepretado como fragmentos de la litosfera oceánica del Arco volcánico Caribeano (~135-70 Ma) así como relictos de la litosfera oceánica del proto-Caribe (Jurásico Superior-Cretácico Inferior) relacionados con la ruptura de Pangea. La ofiolita de Cerro Colorado, localizada en la Península de Paraguaná es, conjuntamente con el caso de la Cordillera de la Costa en la parte centro norte de Venezuela, el único caso de esas ofiolitas Venezolanas que contienen cuerpos de cromititas. Sin embargo, se desconoce aún la petrogénesis de dichos complejos de rocas máficas y ultramáficas. Con el objeto de avanzar en el estado del conocimiento de la génesis de menas de cromita en la región del Caribe, en este trabajo se aborda el estudio de la génesis del cuerpo de cromitita de Cerro Colorado. El cuerpo de cromitita de Cerro Colorado está constituido esencialmente por cromita con bajo contenido en Cr [Cr# =Cr/ Cr+Al= 0.44-0.60] y una distribución de elementos trazas similar a la descrita en otras cromititas con alto contenido en Al documentadas en las zonas más someras de la Zona de Transición de la Moho petrológica de otras ofiolitas de edad Mesozoica. Los fundidos calculados en equilibrio con la cromita que forma este cuerpo de cromititas con alto Al son basaltos de trasera de arco. Estos fundidos fueron extraídos de una mantélica formada por peridotitas empobrecidas como resultado de tasas de fusión parcial de ~20 %, lo que dió lugar a la precipitación de cromititas con alto Al relativamente empobrecidas en EGP (≤ 100 ppb suma total de EGP). Una comparación de las firmas geoquímicas de los elementos menores y trazas en la cromita y contenidos de EGP obtenidos a partir del análisis de muestras de roca total de la cromitita de Cerro Colorado con otras cromititas documentadas en el manto de ofiolitas peri-Caribeñas muestra cierta similitud con aquellas altas en Al descritas en la ofiolita de Moa-Baracoa en Cuba oriental. Los resultados obtenidos nos permiten sugerir que las rocas ultramáficas de Cerro Colorado y el cuerpo de cromitita que éstas albergan están íntimamente relacionados con la formación de una cuenca de retro arco desarrollada en un el intervalo temporal 125-120 Ma en la trasera del Arco de las Antillas Mayores.This research was financially supported by FEDER Funds through the projects CGL2015-65824-P and CGL2014-55949-R granted by the Spanish “Ministerio de Economía y Competitividad.” Additional funding was provided by the Ramón y Cajal Fellowship RYC-2015-17596 granted by the Spanish MINECO to JMGJ.Sociedad Geológica MexicanaMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120202021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/233116reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2015-65824-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2014-55949-Rinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/RYC-2015-17596http://dx.doi.org/10.18268/BSGM2020v72n3a280719Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2331162026-05-22T06:33:51Z |
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15,81155 |