Melt-solid dihedral angles of common minerals in natural rocks

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doi: 10.1093/petrology/egi094
Authors:Holness, M. B.
Author Affiliations:Primary:
University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
Volume Title:Journal of Petrology
Source:Journal of Petrology, 47(4), p.791-800. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:2006
Note:In English. 54 refs.; illus., incl. 1 table
Summary:The melt-solid dihedral angle has been measured in a range of igneous rock types, ranging in composition from picrite, through basalt, phonolite, andesite and rhyolite, for the minerals quartz, leucite, plagioclase, olivine, amphibole and clinopyroxene. Populations of up to 104 true 3-D angles were measured in each sample using a universal stage mounted on an optical microscope. The median and standard deviation of the angle populations for each mineral are distinct (plagioclase ∼25°, with standard deviation (SD) 11°; clinopyroxene ∼38°, with SD 14°; olivine DF29°, with SD 13°; quartz ∼18°, with SD 9°; leucite ∼20°, with °SD 11°), with no control by either melt composition or degree of approach of the grains to their equilibrium shapes.
Sections:Petrology
Subsections:Igneous petrology
Subjects:Amphibole group; Andesites; Basalts; Chain silicates; Clinopyroxene; Feldspar group; Framework silicates; Igneous rocks; Leucite; Melts; Microscope methods; Mineral composition; Nesosilicates; Olivine; Olivine group; Orthosilicates; Phonolites; Plagioclase; Pyroxene group; Quartz; Rhyolites; Silica minerals; Silicates; Universal stage; Volcanic rocks; Dihedral angles
Abstract Numbers:06M/1476
Record ID:2007048458
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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