Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland
Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history. Ages of 723–702 Ma obtained from the vicinity of the Wester Keolka Shear Zone indicate a Neoproterozoic (Knoydartian) age and preclud...
Main Authors: | , , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
2016
|
Subjects: | |
Online Access: | https://doi.org/10.6084/m9.figshare.3454130.v1 https://figshare.com/articles/Evidence_from_Rb_Sr_mineral_ages_for_multiple_orogenic_events_in_the_Caledonides_of_Shetland_Scotland/3454130 |
id |
ftgeosoclonfig:oai:figshare.com:article/3454130 |
---|---|
record_format |
openpolar |
spelling |
ftgeosoclonfig:oai:figshare.com:article/3454130 2023-05-15T16:03:47+02:00 Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland S. Walker M. F. Thirlwall R. A. Strachan A. F. Bird 2016-06-21T11:55:15Z https://doi.org/10.6084/m9.figshare.3454130.v1 https://figshare.com/articles/Evidence_from_Rb_Sr_mineral_ages_for_multiple_orogenic_events_in_the_Caledonides_of_Shetland_Scotland/3454130 unknown doi:10.6084/m9.figshare.3454130.v1 https://figshare.com/articles/Evidence_from_Rb_Sr_mineral_ages_for_multiple_orogenic_events_in_the_Caledonides_of_Shetland_Scotland/3454130 CC BY 4.0 CC-BY Geology Grampian accretionary orogenic events mainland Scotland Scandian nappe pile Uyea Shear Zone East Mainland Succession Silurian Moine Thrust North Atlantic Caledonides Wester Keolka Shear Zone Yell Sound Group Dataset 2016 ftgeosoclonfig https://doi.org/10.6084/m9.figshare.3454130.v1 2020-02-21T07:23:44Z Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history. Ages of 723–702 Ma obtained from the vicinity of the Wester Keolka Shear Zone indicate a Neoproterozoic (Knoydartian) age and preclude its correlation with the Silurian Moine Thrust. Ordovician ages of c . 480–443 Ma obtained from the Yell Sound Group and the East Mainland Succession constrain deformation fabrics and metamorphic assemblages to have formed during Grampian accretionary orogenic events, broadly contemporaneously with orogenesis of the Dalradian Supergroup in Ireland and mainland Scotland. The relative paucity of Silurian ages is attributed to a likely location at a high structural level in the Scandian nappe pile relative to mainland Scotland. Ages of c . 416 and c . 411 Ma for the Uyea Shear Zone suggest a late orogenic evolution that has more in common with East Greenland and Norway than with northern mainland Scotland. Supplementary material: Detailed appraisal of biotite petrography is available at http://www.geolsoc.org.uk/SUP18887 . Dataset East Greenland Greenland North Atlantic Geological Society of London: Figshare Greenland Norway |
institution |
Open Polar |
collection |
Geological Society of London: Figshare |
op_collection_id |
ftgeosoclonfig |
language |
unknown |
topic |
Geology Grampian accretionary orogenic events mainland Scotland Scandian nappe pile Uyea Shear Zone East Mainland Succession Silurian Moine Thrust North Atlantic Caledonides Wester Keolka Shear Zone Yell Sound Group |
spellingShingle |
Geology Grampian accretionary orogenic events mainland Scotland Scandian nappe pile Uyea Shear Zone East Mainland Succession Silurian Moine Thrust North Atlantic Caledonides Wester Keolka Shear Zone Yell Sound Group S. Walker M. F. Thirlwall R. A. Strachan A. F. Bird Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland |
topic_facet |
Geology Grampian accretionary orogenic events mainland Scotland Scandian nappe pile Uyea Shear Zone East Mainland Succession Silurian Moine Thrust North Atlantic Caledonides Wester Keolka Shear Zone Yell Sound Group |
description |
Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history. Ages of 723–702 Ma obtained from the vicinity of the Wester Keolka Shear Zone indicate a Neoproterozoic (Knoydartian) age and preclude its correlation with the Silurian Moine Thrust. Ordovician ages of c . 480–443 Ma obtained from the Yell Sound Group and the East Mainland Succession constrain deformation fabrics and metamorphic assemblages to have formed during Grampian accretionary orogenic events, broadly contemporaneously with orogenesis of the Dalradian Supergroup in Ireland and mainland Scotland. The relative paucity of Silurian ages is attributed to a likely location at a high structural level in the Scandian nappe pile relative to mainland Scotland. Ages of c . 416 and c . 411 Ma for the Uyea Shear Zone suggest a late orogenic evolution that has more in common with East Greenland and Norway than with northern mainland Scotland. Supplementary material: Detailed appraisal of biotite petrography is available at http://www.geolsoc.org.uk/SUP18887 . |
format |
Dataset |
author |
S. Walker M. F. Thirlwall R. A. Strachan A. F. Bird |
author_facet |
S. Walker M. F. Thirlwall R. A. Strachan A. F. Bird |
author_sort |
S. Walker |
title |
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland |
title_short |
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland |
title_full |
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland |
title_fullStr |
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland |
title_full_unstemmed |
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland |
title_sort |
evidence from rb–sr mineral ages for multiple orogenic events in the caledonides of shetland, scotland |
publishDate |
2016 |
url |
https://doi.org/10.6084/m9.figshare.3454130.v1 https://figshare.com/articles/Evidence_from_Rb_Sr_mineral_ages_for_multiple_orogenic_events_in_the_Caledonides_of_Shetland_Scotland/3454130 |
geographic |
Greenland Norway |
geographic_facet |
Greenland Norway |
genre |
East Greenland Greenland North Atlantic |
genre_facet |
East Greenland Greenland North Atlantic |
op_relation |
doi:10.6084/m9.figshare.3454130.v1 https://figshare.com/articles/Evidence_from_Rb_Sr_mineral_ages_for_multiple_orogenic_events_in_the_Caledonides_of_Shetland_Scotland/3454130 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3454130.v1 |
_version_ |
1766399474130747392 |