Alkali feldspars from part of the Galway granite, Ireland
1972; Cambridge University Press; Volume: 38; Issue: 299 Linguagem: Inglês
10.1180/minmag.1972.038.299.04
ISSN1471-8022
Autores Tópico(s)Clay minerals and soil interactions
ResumoSummary The structural states of alkali feldspars from the eastern end of the Galway Granite show transitions from orthoclase to microcline as a result of late deformation. Analyses of twenty samples for SiO 2 , Al 2 O 3 , TiO 2 , Fe 2 O 3 , CaO, Na 2 O, K 2 O, S, Cu, Zn, Ga, Rb, Sr, Ba, and Pb agree with previously determined orders of entry of elements into the ‘alkali site’. A relationship between this order of entry and the melting points of feldspar end-members is discussed.
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