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Record: oai:ARNO:505938

AuthorsA.A. Soares de Andrade, Conceição L. Vieira
TitleThe Odivelas gabbro complex (Alentejo, Portugal): a Hercynian synorogenic layered intrusion
JournalLeidse Geologische Mededelingen
AbstractThe ultramafic-mafic zone of the Hercynian Beja Massif includes 1) the Quintos amphibolite-diorite-serpentinite Complex, 2) the Odivelas layered gabbro Complex, and 3) the Peroguarda (meta) basalt-andesite Complex.
The rhythmic and cryptic zoning of the Odivelas Complex is described, as well as its sedimentary structures and cumulate textures. The gabbros are of the high-alumina type; they have tholeiitic affinities at lower levels and alkalic affinities (due to a Nametasomatism) at upper levels. The Odivelas Complex has probably crystallized under conditions of the granulite facies.
Document typearticle
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