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Regional metamorphism in the Ballachulish area, SW Highlands, Scotland; new perspectives on a famous old debate, with regional implications

David R. M. Pattison
Regional metamorphism in the Ballachulish area, SW Highlands, Scotland; new perspectives on a famous old debate, with regional implications
Journal of the Geological Society of London (May 2013) 170 (3): 417-434

Abstract

The Ballachulish region of the SW Highlands of Scotland was the focal point of a famous debate in the 1920s between Sir Edward Battersby Bailey and Professor Cecil Edgar Tilley concerning the identity, geometry and timing of development of metamorphic zones in the SW Highlands. New mineral assemblage data, microstructural observations, and rock and mineral compositional data are combined with phase equilibrium modelling to reassess the metamorphism in this area. The newly revised chlorite, biotite and garnet zones are similar to those of Bailey. Compositional difference between lithologies is the primary cause of the irregular distribution of mineral assemblages in the region. Microstructural observations suggest that metamorphism occurred in the latter stages of the deformation history, in agreement with previous studies. Pressure-temperature conditions of the garnet isograd are estimated to be c. 7 kbar, c. 500 degrees C. These are compared with P-T estimates of the garnet zone elsewhere in Scotland.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 170
Serial Issue: 3
Title: Regional metamorphism in the Ballachulish area, SW Highlands, Scotland; new perspectives on a famous old debate, with regional implications
Affiliation: University of Calgary, Department of Geoscience, Calgary, AB, Canada
Pages: 417-434
Published: 201305
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 80
Accession Number: 2013-047809
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Supplemental information/data is available in the online version of this article
Illustration Description: illus. incl. 1 table, geol. sketch maps
N56°30'00" - N56°49'60", W05°30'00" - W05°00'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201330
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