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Type: Journal article
Title: Orogenic versus extensional settings for regional metamorphism: Knoydartian events in the Moine Supergroup revisited
Author: Cutts, K.
Hand, M.
Kelsey, D.
Strachan, R.
Citation: Journal of the Geological Society, 2009; 166(Part 2):201-204
Publisher: Geological Soc Publ House
Issue Date: 2009
ISSN: 0016-7649
Statement of
K.A. Cutts, M. Hand, D.E. Kelsey and R.A. Strachan
Abstract: Considerable debate exists over the tectonic regimes associated with mid-Neoproterozoic metamorphism of the Moine Supergroup, NW Scotland. Published pressure conditions imply burial to 35-40 km, a potential doubling of crustal thickness, and hence a substantial collisional event. Re-evaluation using updated thermodynamic software suggests more modest peak pressures of c. 7.5 kbar implying burial to c. 21 km. The revised P-T path has a comparatively flat clockwise evolution from early high geothermal gradient conditions. The revised P-T conditions suggest that c. 800 Ma crustal thickening within the Moine Supergroup was less significant than previously envisaged and possibly preceded by extension. © 2009 Geological Society of London.
Description: © 2009 Geological Society of London
DOI: 10.1144/0016-76492008-015
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Appears in Collections:Aurora harvest
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