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

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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
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100 1 |a Alsop, G. I.  |e analytic author  |u University of Durham, Department of Geological Sciences, Durham 
245 1 0 |a Caledonian extension in the North Irish Dalradian; implications for the timing and activation of gravity collapse 
300 |a p. 33-36 
500 |a In English. 16 refs. 
500 |a Abstract number: 93M/3422 
500 |a Abstractor: R.A.H. 
500 |a Affiliation: University of Durham, Department of Geological Sciences; Durham; GBR; United Kingdom 
500 |a Key title: Journal of the Geological Society of London 
500 |a Source note: 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 
500 |a Publication type: journal article 
504 |b 16 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a 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 #GT= 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. 
650 7 |a Caledonian Orogeny  |2 georeft 
650 7 |a Dalradian  |2 georeft 
650 7 |a Extension tectonics  |2 georeft 
650 7 |a Gravity sliding  |2 georeft 
650 7 |a Nappes  |2 georeft 
650 7 |a Paleozoic  |2 georeft 
650 7 |a Tectonics  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a Northern Ireland  |2 georeft 
651 7 |a United Kingdom  |2 georeft 
651 7 |a Western Europe  |2 georeft 
700 1 |a Hutton, D. H. W.,  |e analytic author 
773 0 |t Journal of the Geological Society of London  |d London : Geological Society of London, Jan. 1993  |x 0016-7649  |y JGSLAS  |n 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 type: journal article  |g Vol. 150, Part 1  |h illus. incl. geol. sketch map 
856 |u urn:doi: 10.1144/gsjgs.150.1.0033