File:Alcalifels.svg
Summary
Description |
Italiano: Diagramma del sistema Or-Ab-An. Fino a PH2O=2kb si ha la cristallizzazione del fuso in fasi solide con miscibilità totale; il minimo divide il sanidino dall'Anortoclasio; si forma un unico alcalifeldspato. Ad alta P (PH2O = 5 kb, quindi in condizioni fortemente plutoniche), diminuisce la T di cristallizzazione, restringendo il campo di miscibiltà e separando nettamente i termini sodici da quelli potassici; la cristallizzazione comincia più tardi. Con l'aumentare della pressione idrata, aumenta l'avvicinamento tra pertiti ed alcalifeldspati, che a PH2= = 5 kb dà origine a smescolamenti pertitici. |
Date | |
Source | Own work |
Author | Fradeve11 |
SVG development |
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