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http://hdl.handle.net/10773/13025
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Azevedo, M. R. | pt |
dc.contributor.author | Nolan, J. | pt |
dc.date.accessioned | 2014-12-17T15:15:34Z | - |
dc.date.issued | 1998 | - |
dc.identifier.issn | 0024-4937 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/13025 | - |
dc.description.abstract | The Fornos de Algodres Complex (FAC) comprises several intrusions of late-post-tectonic Hercynian granitic rocks ranging in composition from hornblende granodiorites and quartz monzodiorites, through coarse porphyritic biotite granites and two-mica granites (coarse-, medium- and fine-grained), to muscovite-rich leucogranites. Field and regional constraints show that the emplacement of this large, composite, batholithic complex post-dates the main Variscan regional deformation phases (D1 + D2 + D3) and associated metamorphic events. Field, petrographic and geochemical data suggest a strong genetic relationship between most of the members of the FAC. However, their Rb-Sr and Sm-Nd isotopic signatures appear to rule out any genetic process involving a single homogeneous source and/or closed-system fractional crystallization of the same parental magma. A model involving hybridization of mantle-derived basaltic liquids with crustal anatectic melts followed by further contamination and fractional crystallization is proposed to explain the isotopic and geochemical variation trends defined by the FAC granitic rocks. | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.relation | FCT - PRAXIS 2/2.1/CTA/391/94 | pt |
dc.rights | openAccess | por |
dc.subject | Assimilation | pt |
dc.subject | Fractional crystallization | pt |
dc.subject | Granites | pt |
dc.subject | Hybridization | pt |
dc.subject | Iberian Variscan Fold Belt | pt |
dc.subject | Magma mixing | pt |
dc.subject | Portugal | pt |
dc.subject | Hercynian orogeny | pt |
dc.title | Hercynian late-post-tectonic granitic rocks from the Fornos de Algodres area (Northern Central Portugal) | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
ua.event.title | Lithos | - |
degois.publication.firstPage | 1 | pt |
degois.publication.issue | 1-2 | - |
degois.publication.issue | 1-2 | pt |
degois.publication.lastPage | 20 | pt |
degois.publication.title | Lithos | pt |
degois.publication.volume | 44 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.doi | 10.1016/S0024-4937(98)00019-X | pt |
Appears in Collections: | DGeo - Artigos |
Files in This Item:
File | Description | Size | Format | |
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lithos_Azevedo_Nolan_98.pdf | documento principal | 1.7 MB | Adobe PDF | View/Open |
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