Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides
This work was in part supported by Natural Environment Research Council grant NE/J021822/1, National Science Foundation grant EAR-0087650, and funds from our respective institutions. Neoproterozoic siliciclastic-dominated sequences are widespread along the eastern margin of Laurentia and are related...
Published in: | Geological Society of America Bulletin |
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Main Authors: | , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2014
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Online Access: | http://hdl.handle.net/10023/5774 http://gsabulletin.gsapubs.org/content/early/2014/09/16/B31068.1.abstract https://doi.org/10.1130/B31068.1 |
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Open Polar |
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University of St Andrews: Digital Research Repository |
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English |
topic |
GE Environmental Sciences QE Geology NDAS GE QE |
spellingShingle |
GE Environmental Sciences QE Geology NDAS GE QE Cawood, Peter A. Strachan, Robin A. Merle, Renaud E. Millar, Ian L. Loewy, Staci L. Dalziel, Ian W.D. Kinny, Peter D. Jourdan, Fred Nemchin, Alexander A. Connelly, James N. Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides |
topic_facet |
GE Environmental Sciences QE Geology NDAS GE QE |
description |
This work was in part supported by Natural Environment Research Council grant NE/J021822/1, National Science Foundation grant EAR-0087650, and funds from our respective institutions. Neoproterozoic siliciclastic-dominated sequences are widespread along the eastern margin of Laurentia and are related to rifting associated with the breakout of Laurentia from the supercontinent Rodinia. Detrital zircons from the Moine Supergroup, NW Scotland, yield Archean to early Neoproterozoic U-Pb ages, consistent with derivation from the Grenville-Sveconorwegian orogen and environs and accumulation post–1000 Ma. U-Pb zircon ages for felsic and associated mafic intrusions confirm a widespread pulse of extension-related magmatism at around 870 Ma. Pegmatites yielding U-Pb zircon ages between 830 Ma and 745 Ma constrain a series of deformation and metamorphic pulses related to Knoydartian orogenesis of the host Moine rocks. Additional U-Pb zircon and monazite data, and 40Ar/39Ar ages for pegmatites and host gneisses indicate high-grade metamorphic events at ca. 458–446 Ma and ca. 426 Ma during the Caledonian orogenic cycle.The presence of early Neoproterozoic siliciclastic sedimentation and deformation in the Moine and equivalent successions around the North Atlantic and their absence along strike in eastern North America reflect contrasting Laurentian paleogeography during the breakup of Rodinia. The North Atlantic realm occupied an external location on the margin of Laurentia, and this region acted as a locus for accumulation of detritus (Moine Supergroup and equivalents) derived from the Grenville-Sveconorwegian orogenic welt, which developed as a consequence of collisional assembly of Rodinia. Neoproterozoic orogenic activity corresponds with the inferred development of convergent plate-margin activity along the periphery of the supercontinent. In contrast in eastern North America, which lay within the internal parts of Rodinia, sedimentation did not commence until the mid-Neoproterozoic (ca. 760 Ma) during initial stages ... |
author2 |
NERC University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. School of Geography and Geosciences University of St Andrews. Scottish Oceans Institute University of St Andrews. Earth and Environmental Sciences University of St Andrews. St Andrews Isotope Geochemistry |
format |
Article in Journal/Newspaper |
author |
Cawood, Peter A. Strachan, Robin A. Merle, Renaud E. Millar, Ian L. Loewy, Staci L. Dalziel, Ian W.D. Kinny, Peter D. Jourdan, Fred Nemchin, Alexander A. Connelly, James N. |
author_facet |
Cawood, Peter A. Strachan, Robin A. Merle, Renaud E. Millar, Ian L. Loewy, Staci L. Dalziel, Ian W.D. Kinny, Peter D. Jourdan, Fred Nemchin, Alexander A. Connelly, James N. |
author_sort |
Cawood, Peter A. |
title |
Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides |
title_short |
Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides |
title_full |
Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides |
title_fullStr |
Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides |
title_full_unstemmed |
Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides |
title_sort |
neoproterozoic to early paleozoic extensional and compressional history of east laurentian margin sequences : the moine supergroup, scottish caledonides |
publishDate |
2014 |
url |
http://hdl.handle.net/10023/5774 http://gsabulletin.gsapubs.org/content/early/2014/09/16/B31068.1.abstract https://doi.org/10.1130/B31068.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Geological Society of America Bulletin Cawood , P A , Strachan , R A , Merle , R E , Millar , I L , Loewy , S L , Dalziel , I W D , Kinny , P D , Jourdan , F , Nemchin , A A & Connelly , J N 2015 , ' Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides ' , Geological Society of America Bulletin , vol. 127 , no. 3-4 , pp. 349-371 . https://doi.org/10.1130/B31068.1 0016-7606 PURE: 149506613 PURE UUID: 4a15bb1b-166e-492a-9890-a764a772c26f Bibtex: urn:66084f1010c37733b682e2a0ce11e26f Scopus: 84924931900 WOS: 000352631600002 http://hdl.handle.net/10023/5774 http://gsabulletin.gsapubs.org/content/early/2014/09/16/B31068.1.abstract https://doi.org/10.1130/B31068.1 NE/J021822/1 |
op_rights |
Copyright © 2014 Geological Society of America; Gold Open Access: This paper is published under the terms of the CC-BY licence (http://creativecommons.org/licenses/by/3.0/us/) |
op_doi |
https://doi.org/10.1130/B31068.1 |
container_title |
Geological Society of America Bulletin |
container_volume |
127 |
container_issue |
3-4 |
container_start_page |
349 |
op_container_end_page |
371 |
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1770272909136232448 |
spelling |
ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/5774 2023-07-02T03:33:06+02:00 Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides Cawood, Peter A. Strachan, Robin A. Merle, Renaud E. Millar, Ian L. Loewy, Staci L. Dalziel, Ian W.D. Kinny, Peter D. Jourdan, Fred Nemchin, Alexander A. Connelly, James N. NERC University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. School of Geography and Geosciences University of St Andrews. Scottish Oceans Institute University of St Andrews. Earth and Environmental Sciences University of St Andrews. St Andrews Isotope Geochemistry 2014-11-17T12:31:02Z application/pdf http://hdl.handle.net/10023/5774 http://gsabulletin.gsapubs.org/content/early/2014/09/16/B31068.1.abstract https://doi.org/10.1130/B31068.1 eng eng Geological Society of America Bulletin Cawood , P A , Strachan , R A , Merle , R E , Millar , I L , Loewy , S L , Dalziel , I W D , Kinny , P D , Jourdan , F , Nemchin , A A & Connelly , J N 2015 , ' Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides ' , Geological Society of America Bulletin , vol. 127 , no. 3-4 , pp. 349-371 . https://doi.org/10.1130/B31068.1 0016-7606 PURE: 149506613 PURE UUID: 4a15bb1b-166e-492a-9890-a764a772c26f Bibtex: urn:66084f1010c37733b682e2a0ce11e26f Scopus: 84924931900 WOS: 000352631600002 http://hdl.handle.net/10023/5774 http://gsabulletin.gsapubs.org/content/early/2014/09/16/B31068.1.abstract https://doi.org/10.1130/B31068.1 NE/J021822/1 Copyright © 2014 Geological Society of America; Gold Open Access: This paper is published under the terms of the CC-BY licence (http://creativecommons.org/licenses/by/3.0/us/) GE Environmental Sciences QE Geology NDAS GE QE Journal article 2014 ftstandrewserep https://doi.org/10.1130/B31068.1 2023-06-13T18:30:22Z This work was in part supported by Natural Environment Research Council grant NE/J021822/1, National Science Foundation grant EAR-0087650, and funds from our respective institutions. Neoproterozoic siliciclastic-dominated sequences are widespread along the eastern margin of Laurentia and are related to rifting associated with the breakout of Laurentia from the supercontinent Rodinia. Detrital zircons from the Moine Supergroup, NW Scotland, yield Archean to early Neoproterozoic U-Pb ages, consistent with derivation from the Grenville-Sveconorwegian orogen and environs and accumulation post–1000 Ma. U-Pb zircon ages for felsic and associated mafic intrusions confirm a widespread pulse of extension-related magmatism at around 870 Ma. Pegmatites yielding U-Pb zircon ages between 830 Ma and 745 Ma constrain a series of deformation and metamorphic pulses related to Knoydartian orogenesis of the host Moine rocks. Additional U-Pb zircon and monazite data, and 40Ar/39Ar ages for pegmatites and host gneisses indicate high-grade metamorphic events at ca. 458–446 Ma and ca. 426 Ma during the Caledonian orogenic cycle.The presence of early Neoproterozoic siliciclastic sedimentation and deformation in the Moine and equivalent successions around the North Atlantic and their absence along strike in eastern North America reflect contrasting Laurentian paleogeography during the breakup of Rodinia. The North Atlantic realm occupied an external location on the margin of Laurentia, and this region acted as a locus for accumulation of detritus (Moine Supergroup and equivalents) derived from the Grenville-Sveconorwegian orogenic welt, which developed as a consequence of collisional assembly of Rodinia. Neoproterozoic orogenic activity corresponds with the inferred development of convergent plate-margin activity along the periphery of the supercontinent. In contrast in eastern North America, which lay within the internal parts of Rodinia, sedimentation did not commence until the mid-Neoproterozoic (ca. 760 Ma) during initial stages ... Article in Journal/Newspaper North Atlantic University of St Andrews: Digital Research Repository Geological Society of America Bulletin 127 3-4 349 371 |