Origin of finger structures in the Rhum Complex; phase equilibrium and heat effects

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Authors:Morse, S. A.; Owens, Brent E.; Butcher, Alan R.
Author Affiliations:Primary:
Univ. Mass., Dep. Geol. and Geogr., Amherst, MA, United States
Washington Univ., Dep. Earth and Planet. Sci., United States
CSIR, Natl. Phys. Res. Lab., South Africa
Volume Title:Geological Magazine
Source:Geological Magazine, 124(3), p.205-210. Publisher: Cambridge University Press, London, United Kingdom. ISSN: 0016-7568
Publication Date:1987
Note:In English. 21 refs.; illus.
Summary:It is proposed that thin sills of mafic magma penetrated troctolite rock and became supercooled. In those sills that were thick enough, plagioclase in the roof was dissolved, the necessary heat being supplied by olivine crystallization. Crystallization of augite before plagioclase in the fingers that penetrate troctolite is atypical of Rhum and is ascribed to the greater ease of pyroxene nucleation in supercooled liquid. [C.H.D.]
Subjects:Gabbros; Igneous rocks; Inclusions; Melting; Petrology; Phase equilibria; Plutonic rocks; Troctolite; Xenoliths; Europe; Great Britain; Hebrides; Highland region Scotland; Inner Hebrides; Inverness-shire Scotland; Rhum; Scotland; United Kingdom; Western Europe; Rhum Complex
Abstract Numbers:88M/1232
Record ID:1987066736
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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