Multiple growth twinning of k-feldspar in hypersolvus granite

R. H. Vernon*, S. P. Turner

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Multiple growth twinning, involving three or four sub-individuals, occurs sporadically in the K-feldspar (mesoperthite) of hypersolvus granites from Norway and South Australia. The twin lamellae resulted from perturbations during crystal growth, as opposed to the formation at the nucleation stage applicable to simple twins. The unusual conditions controlling the formation of the lamellar twins are presumably localized, but not understood, and could be related to bursts of increased supersaturation resulting from transient perturbations in cooling rate or loss of volatiles.

Original languageEnglish
Title of host publicationFeldspar
Subtitle of host publicationMineral Composition, Geology and Petrogenesis Significance
EditorsFrancis D. Whitmore, Jorge B. Escamilla
Place of PublicationNew York
PublisherNova Science Publishers
Number of pages11
ISBN (Electronic)9781629486482
ISBN (Print)9781629486475, 1629486477
Publication statusPublished - 2014

Publication series

NameGeology and Mineralogy Research Developments
PublisherNova Science Publications


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