Geophysical constraints on crustal structure in the Dalradian region of Scotland

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doi: 10.1144/gsjgs.142.1.0149
Authors:Hall, J.
Author Affiliations:Primary:
University of Glasgow, Department of Geology, Glasgow, United Kingdom
Leeds University, United Kingdom
Volume Title:Conditions of Dalradian metamorphism
Volume Authors:Graham, Colin M., convener; Harte, Ben
Source:Journal of the Geological Society of London, Vol.142(Part 1), p.149-155; Conditions of Dalradian metamorphism, Edinburgh, United Kingdom, Sept. 20-21, 1983, convened by Colin M. Graham and Ben Harte. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1985
Note:In English. 35 refs.; illus., incl. geol. sketch map
Summary:The crust in the region of the Scottish Dalradian outcrop is 25-35 km thick and may be divided into two areas separated by the NW-SE Cruachan lineament. To the NE, the crust is dominated by late Caledonian granites, which give rise to surface topography isostatically compensated at shallow depth; to the SW, thick Dalradian sediments formed in an extensional basin, later subjected to 70-100 km of crustal shortening achieved by a zig-zag obduction. The physical parameters of the deep crust are compatible with metamorphic grade increasing downwards, except that the basic lower crust may be partly retrogressed and contain free water. [R.A.H.]
Subjects:Bouguer anomalies; Caledonian Orogeny; Crust; Crustal shortening; Dalradian; Electrical conductivity; Geophysical methods; Geophysical profiles; Grade; Granites; Gravity anomalies; Igneous rocks; Isostasy; Lineaments; Magnetic anomalies; Metamorphic rocks; Metamorphism; Models; Obduction; Paleozoic; Plate tectonics; Plutonic rocks; Seismic methods; Seismic profiles; Seismic stratigraphy; Surveys; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Cruachan Lineament
Coordinates:N560000 N574500 W0013000 W0043000
Abstract Numbers:85M/1072
Record ID:2003045112
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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