English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/156912
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

The basaltic volcanism of the dumisseau formation in the sierra de bahoruco, sw dominican republic: A record of the mantle plume magmatism of the caribbean large igneous province

Other TitlesEl volcanismo basáltico de la formación dumisseau en la sierra de bahoruco, SO de la República Dominicana: Registro del magmatismo de pluma mantélica de la provincia ígnea caribeña
AuthorsEscuder-Viruete, J.; Abad, M.; Pérez-Valera, F.; Gabites, J.; Pérez-Estaún, Andrés ; Joubert, M.; Joubert, M.
Caribbean large igneous province
Dumisseau formation
Mantle plume magmatism
Issue DateOct-2017
PublisherInstituto Geológico y Minero de España
CitationBoletin Geologico y Minero,128(3): 541-568 (2017)
AbstractThe Dumisseau Fm outcropping in the Sierra de Bahoruco offers the opportunity for studying on land the mantle plume magmatism generator of the Caribbean large igneous province (CLIP) during the Late Cretaceous. It consists of a sequence of about 1.0-1.5 km-thick mainly composed of mafic basaltic flows and pyroclastic deposits, with subordinated volcanogenic sedimentary deposits and syn-volcanic doleritic sills and dikes. All the volcanic rocks were erupted or re-sedimented in relatively deep-marine conditions, as evi-infedenced by the rare interbedded chert and pelagic limestone. On the basis of the MgO, TiO2 and incompatible trace elements contents three geochemical groups have been identified in the Dumisseau Fm: low-Ti tholeiites; high-Ti or transitional basalts; and high-Ti and LREE alkaline basalts. Geochemical modelling indicates a derivation from melts generated and incorporated at different depths in the mantle, which is consistent with the processes that take place during the rise of a mantle plume beneath the oceanic crust. Two 40Ar/39Ar wholerock ages indicate the extrusion of magmas at least in the 92-74. Ma time interval (Turonian-Coniacian boundary to Maastrichtian), resulting coeval with the formation of the CLIP. As a result, the Dumisseau Fm is an emerged fragment of the CLIP, with which it must have continuity through the Beata Ridge. These rocks are unconformably overlain by carbonate red algae facies of the middle-upper Eocene, constituting the volcanic basement of the Sierra de Bahoruco. © 2017, Instituto Geologico y Minero de Espana. All rights reserved.
Publisher version (URL)http://dx.doi.org/10.21701/bolgeomin.128.3.002
Appears in Collections:(ICTJA) Artículos
Files in This Item:
File Description SizeFormat 
PerezEstaun_Boletin_Geologico_Minero_128_3_541.pdf2,13 MBAdobe PDFThumbnail
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.