Caledonian extension in the North Irish Dalradian; implications for the timing and activation of gravity collapse

Saved in:
Online Access: Get full text
doi: 10.1144/gsjgs.150.1.0033
Authors:Alsop, G. I.; Hutton, D. H. W.
Author Affiliations:Primary:
University of Durham, Department of Geological Sciences, Durham, United Kingdom
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, Vol.150(Part 1), p.33-36. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1993
Note:In English. 16 refs.; illus. incl. geol. sketch map
Summary:After Caledonian crustal thickening and metamorphism of the Dalradian rocks on the SE Laurentian margin in Northern Ireland, down-dip (gravity controlled) extension due to orogenic collapse was concentrated in inverted limbs of the major fold nappes. This extensionalcollapse can be correlated along strike for >= 100 km and occurred immediately after the crustal thickening episode. The authors contend that the collapse was triggered by release of fluids during the prograde metamorphism and that late-stage mobilization of the extensional zone produced the Au mineralization in the Sperrin Mts. [R.A.H.]
Subjects:Caledonian Orogeny; Dalradian; Extension tectonics; Gravity sliding; Nappes; Paleozoic; Tectonics; Europe; Northern Ireland; United Kingdom; Western Europe
Abstract Numbers:93M/3422
Record ID:1993002889
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Tags: Add Tag
No Tags, Be the first to tag this record!
Be the first to leave a comment!
You must be logged in first