Amphiboles and phyllosilicates in the A-type Mandira granite massif, Graciosa Province, SE Brazil; textures, composition and crystallisation conditions

Amphibole and biotite were the principal mafic minerals precipitated during the magmatic and post-magmatic (including hydrothermal) crystallisation stages of coeval metaluminous to slightly peraluminous syenogranites and peralkaline alkali-feldspar granites of the Mandira Granite Massif, in the post...

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Veröffentlicht in:	Mineralogical magazine 2021-10, Vol.85 (5), p.784-807
Hauptverfasser:	Siachoque, Astrid, Santos, Caio A, Vlach, Silvio R. F
Format:	Artikel
Sprache:	eng
Schlagworte:	A-type granites amphibole group biotite Brazil chain silicates chemical composition crystallization Earth emplacement fluid pressure Geology Graciosa Province Granite granites granosyenite hydrothermal conditions igneous and metamorphic rocks igneous rocks intrusions Mandira Massif metals mica group mineral composition Mineralogy P-T conditions peralkalic composition Petrology plutonic rocks Quartz Rare earth elements rare earths Sao Paulo Brazil sheet silicates silicates South America syenites trace elements
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