NDLI: Alkali feldspar megacryst growth: Geochemical modelling

Content Provider	Springer Nature Link
Author	Słaby, E. Galbarczyk Gąsiorowska, L. Seltmann, R. Müller, A.
Copyright Year	2006
Abstract	Alkali feldspar megacrysts from the porphyritic Karkonosze granite (Western Sudetes, Poland) were formed during magma mixing. Barium concentrations in zoned crystals, a sensitive indicator of feldspar migration between coeval magmas, serve to reconstruct the crystallization path of the megacrysts. Based on geochemical data, a double mixing model for the formation of the porphyritic granite and for megacryst growth is constructed. The feldspar growth model supports megacryst nucleation and early crystallization in a hybridized crustal magma of granodioritic composition. The growth model gives credibility of the choice of partition coefficients used in the modelling. Insights gained from mixing models based on whole rock composition and mineral zonation allow the recognition of various hybridization events that are reflected in a variety of megacryst crystallization paths within the pluton.
Starting Page	1
Ending Page	29
Page Count	29
File Format	PDF
ISSN	09300708
Journal	Mineralogy and Petrology
Volume Number	89
Issue Number	1-2
e-ISSN	14381168
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-06-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geochemistry Mineralogy
Content Type	Text
Resource Type	Article
Subject	Geophysics Geochemistry and Petrology

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Alkali feldspar megacryst growth: Geochemical modelling