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http://hdl.handle.net/10773/13023
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DC Field | Value | Language |
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dc.contributor.author | Lima, M. N. | pt |
dc.contributor.author | Nogueira Neto, J. A. | pt |
dc.contributor.author | Azevedo, M. R. | pt |
dc.contributor.author | Valle Aguado, B. | pt |
dc.date.accessioned | 2014-12-17T13:02:11Z | - |
dc.date.available | 2014-12-17T13:02:11Z | - |
dc.date.issued | 2010 | - |
dc.identifier.issn | 0367-0449 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/13023 | - |
dc.description.abstract | El macizo de Banabuiú aflora en el Dominio Ceará Central (DCC) de la Provincia de Borborema (NE Brasil) como una intrusión granítica alargada según la dirección N-S, concordante con las estructuras regionales. Está emplazado en rocas del Paleoproterozoico intensamente deformadas y transformadas en gneises y migmatitas durante la Orogenia Brasiliense (~600 Ma). Con base en dataciones U-Pb de circones, la edad de cristalización del granito de dos micas de Banabuiú es estimada en 578,6 ± 6,5 Ma. El granito es fuertemente peraluminoso y presenta una signatura geoquímica de tipo-S. Los valores de ε Nd 580 son marcadamente negativos (ε Nd 580 = –19 a –23) y se sobreponen parcialmente con los del Complejo Gnéisico Migmatítico del DCC (ε Nd 580 = –12 a –26), sugiriendo que el magma parental del granito ha sido generado a través de la fusión parcial de materiales corticales semejantes a los que se encuentran en el DCC. | pt |
dc.description.abstract | The Banabuiú massif crops out in the Central Ceará Domain (DCC) of the Borborema Province (NE Brasil), as an N-S elongate granite intrusion, concordant with the regional structures. It was emplaced into basement rocks of Paleoproterozoic age, extensively transformed into gneisses and migmatites during the Brasilian orogeny (∼600 Ma). Using U-Pb zircon dating, the crystallization age of the Banabuiúsyn-kinematic two-mica granite was estimated at 578.6 ± 6.5 Ma. The granite is strongly peraluminous (A/CNK = 1,098 - 1,134) and shows a typical S-type geochemical signature. The ΣNd580 values are strongly negative (ΣNd580 = -19 a -23) and partially overlap with those of the Paleoproterozoic gneissmigmatite complex (ΣNd580 = -12 to -26), suggesting that the parental magmas of the Banabuiú granite could have been produced by partial melting of similar crustal materials. | pt |
dc.language.iso | spa | pt |
dc.publisher | CSIC-UCM | pt |
dc.relation | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) - Proceso nº 478313/2006-3 | pt |
dc.relation | Programa Alban (EO6M103314BR) | pt |
dc.rights | openAccess | por |
dc.subject | Orogenia Brasiliense | pt |
dc.subject | Granitos de dos micas | pt |
dc.subject | Geocronología U-Pb | pt |
dc.subject | Brasiliano Orogeny | pt |
dc.subject | Two-mica granites | pt |
dc.subject | U-Pb geochronology | pt |
dc.subject | Granite | pt |
dc.subject | Migmatite | pt |
dc.subject | Partial melting | pt |
dc.subject | Borborema | pt |
dc.subject | Brazil | pt |
dc.subject | Ceará Central Domain | pt |
dc.title | Geología y geocronología U-Pb del granito de Banabuiú, Noreste de Ceará, Brasil | pt |
dc.title.alternative | Geology and U-Pb geochronology of the Banabuiú granite, Northeastern Ceará, Brazil | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
ua.event.title | Estudios Geologicos | |
degois.publication.firstPage | 35 | pt |
degois.publication.issue | 1 | |
degois.publication.issue | 1 | pt |
degois.publication.lastPage | 44 | pt |
degois.publication.title | Estudios Geológicos | pt |
degois.publication.volume | 66 | pt |
dc.identifier.doi | 10.3989/egeol.40196.113 | pt |
Appears in Collections: | DGeo - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Estudios_Geol_Lima et al_10.pdf | Documento principal | 334.08 kB | Adobe PDF | View/Open |
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