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Xenolithic insights into the deep geology beneath the Ross of Mull

J. W. Faithfull and B. G. J. Upton
Xenolithic insights into the deep geology beneath the Ross of Mull
Scottish Journal of Geology (2006) 42, Part 1: 37-41

Abstract

A rich assemblage of xenoliths is present in three small Permian dykes that cut the Ross of Mull granite on the SW coast of Mull, bordering the Sound of Iona. The xenoliths, up to 80 mm in diameter, are abundant, and include a wide range of compositions, including spinel lherzolites, dunites, pyroxenites, meta-basic granulite-facies gneisses, anorthosites, anorthoclasites, quartzo-feldspathic gneisses and psammitic meta-sediments. Granitic xenoliths attributable to the Ross of Mull pluton are strikingly scarce. The inference is that the majority of the xenoliths were entrained from beneath the pluton. The xenoliths represent a wide cross-section of the lithosphere, from below the Moho to relatively high crustal levels. Cataclasis and intense shearing in some of the crustal xenoliths suggests that the dykes intersected one or more of the bounding Caledonian thrusts at mid-crustal depths.


ISSN: 0036-9276
EISSN: 2041-4951
Coden: SJGEAX
Serial Title: Scottish Journal of Geology
Serial Volume: 42, Part 1
Title: Xenolithic insights into the deep geology beneath the Ross of Mull
Affiliation: University of Glasgow, Hunterian Museum, Glasgow, United Kingdom
Pages: 37-41
Published: 2006
Text Language: English
Publisher: Scottish Academic Press, Edinburgh, United Kingdom
References: 14
Accession Number: 2006-055360
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., 1 table, geol. sketch map
N56°15'00" - N56°40'00", W06°30'00" - W05°40'00"
Secondary Affiliation: University of Edinburgh, GBR, United Kingdom
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200615
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