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Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences: the Moine Supergroup, Scottish Caledonides

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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.

In: Geological Society of America Bulletin, Vol. 127, No. 3-4, 2015, p. 349-371.

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Cawood, PA, Strachan, RA, Merle, RE, Millar, IL, Loewy, SL, Dalziel, IWD, Kinny, PD, Jourdan, F, Nemchin, AA & Connelly, JN 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

APA

Cawood, P. A., Strachan, R. A., Merle, R. E., Millar, I. L., Loewy, S. L., Dalziel, I. W. D., ... 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, 127(3-4), 349-371. https://doi.org/10.1130/B31068.1

Vancouver

Cawood PA, Strachan RA, Merle RE, Millar IL, Loewy SL, Dalziel IWD et al. Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences: the Moine Supergroup, Scottish Caledonides. Geological Society of America Bulletin. 2015;127(3-4):349-371. https://doi.org/10.1130/B31068.1

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. / Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences : the Moine Supergroup, Scottish Caledonides. In: Geological Society of America Bulletin. 2015 ; Vol. 127, No. 3-4. pp. 349-371.

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@article{4a15bb1b166e492a9890a764a772c26f,
title = "Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences: the Moine Supergroup, Scottish Caledonides",
abstract = "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 of supercontinent fragmentation. In the North Atlantic region, this time frame corresponds to a second pulse of extension represented by units such as the Dalradian Supergroup, which unconformably overlies the predeformed Moine succession.",
author = "Cawood, {Peter A.} and Strachan, {Robin A.} and Merle, {Renaud E.} and Millar, {Ian L.} and Loewy, {Staci L.} and Dalziel, {Ian W.D.} and Kinny, {Peter D.} and Fred Jourdan and Nemchin, {Alexander A.} and Connelly, {James N.}",
note = "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.",
year = "2015",
doi = "10.1130/B31068.1",
language = "English",
volume = "127",
pages = "349--371",
journal = "Geological Society of America Bulletin",
issn = "0016-7606",
publisher = "GEOLOGICAL SOC AMER, INC",
number = "3-4",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences

T2 - Geological Society of America Bulletin

AU - Cawood, Peter A.

AU - Strachan, Robin A.

AU - Merle, Renaud E.

AU - Millar, Ian L.

AU - Loewy, Staci L.

AU - Dalziel, Ian W.D.

AU - Kinny, Peter D.

AU - Jourdan, Fred

AU - Nemchin, Alexander A.

AU - Connelly, James N.

N1 - 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.

PY - 2015

Y1 - 2015

N2 - 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 of supercontinent fragmentation. In the North Atlantic region, this time frame corresponds to a second pulse of extension represented by units such as the Dalradian Supergroup, which unconformably overlies the predeformed Moine succession.

AB - 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 of supercontinent fragmentation. In the North Atlantic region, this time frame corresponds to a second pulse of extension represented by units such as the Dalradian Supergroup, which unconformably overlies the predeformed Moine succession.

U2 - 10.1130/B31068.1

DO - 10.1130/B31068.1

M3 - Article

VL - 127

SP - 349

EP - 371

JO - Geological Society of America Bulletin

JF - Geological Society of America Bulletin

SN - 0016-7606

IS - 3-4

ER -

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ID: 149506613