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Pannotia to Pangaea : Neoproterozoic and Paleozoic Orogenic Cycles in the Circum-Atlantic Region (2021)

Geological Society (London, U.K.) ; Murphy, J. Brendan; Strachan, Robin A.; Quesada, Cecilio

London : The Geological Society

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Keywords: Pannotia; Pangaea; Circum-Atlantic Region

Description / Table of Contents: Pannotia to Pangaea: Neoproterozoic and Paleozoic Orogenic Cycles in the Circum-Atlantic Region: A celebration of the career of Damian Nance / J. Brendan Murphy, Robin A. Strachan and Cecilio Quesada / Geological Society, London, Special Publications, 503, 1-11, 11 November 2020, https://doi.org/10.1144/SP503-2020-213 --- Pannotia: in defence of its existence and geodynamic significance / J. Brendan Murphy, R. Damian Nance, Peter A. Cawood, William J. Collins, Wei Dan, Luc S. Doucet, Philip J. Heron, Zheng-Xiang Li, Ross N. Mitchell, Sergei Pisarevsky, Peir K. Pufahl, Cecilio Quesada, Christopher J. Spencer, Rob A. Strachan and Lei Wu / Geological Society, London, Special Publications, 503, 13-39, 27 August 2020, https://doi.org/10.1144/SP503-2020-96 --- Pannotia's mantle signature: the quest for supercontinent identification / Philip J. Heron, J. Brendan Murphy, R. Damian Nance and R. N. Pysklywec / Geological Society, London, Special Publications, 503, 41-61, 8 September 2020, https://doi.org/10.1144/SP503-2020-7 --- Pannotia under prosecution / David A. D. Evans / Geological Society, London, Special Publications, 503, 63-81, 13 October 2020, https://doi.org/10.1144/SP503-2020-182 --- Paleozoic plate kinematics during the Pannotia–Pangaea supercontinent cycle / Uwe Kroner, Tobias Stephan, Rolf L. Romer and Marco Roscher / Geological Society, London, Special Publications, 503, 83-104, 9 July 2020, https://doi.org/10.1144/SP503-2020-15 --- Cusp tectonics: an Ediacaran megakarst landscape and bidirectional mass slides in a Pan-African syntaxis (NW Namibia) / Paul F. Hoffman / Geological Society, London, Special Publications, 503, 105-142, 20 May 2020, https://doi.org/10.1144/SP503-2019-253 --- Tonian–Ediacaran tectonomagmatic evolution of West Avalonia and its Ediacaran–early Cambrian interactions with Ganderia: an example of complex terrane transfer due to arc–arc collision? / C. R. van Staal, S. M. Barr, P. J. A. McCausland, M. D. Thompson and C. E. White / Geological Society, London, Special Publications, 503, 143-167, 5 June 2020, https://doi.org/10.1144/SP503-2020-23 --- 100 myr cycles of oceanic lithosphere generation in peri-Gondwana: Neoproterozoic–Devonian ophiolites from the NW African–Iberian margin of Gondwana and the Variscan Orogen / Ricardo Arenas, Sonia Sánchez Martínez, Richard Albert, Faouziya Haissen, Javier Fernández-Suárez, Núria Pujol-Solà, Pilar Andonaegui, Rubén Díez Fernández, Joaquín A. Proenza, Antonio Garcia-Casco and Axel Gerdes / Geological Society, London, Special Publications, 503, 169-184, 22 May 2020, https://doi.org/10.1144/SP503-2020-3 --- The Dobra Gneiss and the Drosendorf Unit in the southeastern Bohemian Massif, Austria: West Amazonian crust in the heart of Europe / Martin Lindner, Wolfgang Dörr, Daniel Reither and Fritz Finger / Geological Society, London, Special Publications, 503, 185-207, 20 May 2020, https://doi.org/10.1144/SP503-2019-232 --- From Pan-African Transpression to Cadomian Transtension at the West African Margin: New U–Pb zircon Ages from the Eastern Saghro Inlier (Anti-Atlas, Morocco) / Ezzoura Errami, Ulf Linnemann, Mandy Hofmann, Andreas Gärtner, Johannes Zieger, Jessica Gärtner, Katja Mende, Jamal El Kabouri, Dominique Gasquet and Nasser Ennih / Geological Society, London, Special Publications, 503, 209-233, 14 October 2020, https://doi.org/10.1144/SP503-2020-105 --- Lithostratigraphic and structural data from Hardangervidda, southern Norway supporting extended interaction between Avalonia and Baltica / Arild Andresen / Geological Society, London, Special Publications, 503, 235-250, 10 November 2020, https://doi.org/10.1144/SP503-2020-79 --- Early–Middle Ordovician sedimentation and bimodal volcanism at the margin of Iapetus: the Trollhøtta–Kinna Basin of the central Norwegian Caledonides / Bjørgunn H. Dalslåen, Deta Gasser, Tor Grenne, Lars E. Augland and Arild Andresen / Geological Society, London, Special Publications, 503, 251-277, 7 July 2020, https://doi.org/10.1144/SP503-2020-37 --- Late Neoproterozoic–Silurian tectonic evolution of the Rödingsfjället Nappe Complex, orogen-scale correlations and implications for the Scandian suture / Trond Slagstad, Kerstin Saalmann, Chris L. Kirkland, Anne B. Høyen, Bergliot K. Storruste, Nolwenn Coint, Christian Pin, Mogens Marker, Terje Bjerkgård, Allan Krill, Arne Solli, Rognvald Boyd, Tine Larsen Angvik and Rune B. Larsen / Geological Society, London, Special Publications, 503, 279-304, 26 June 2020, https://doi.org/10.1144/SP503-2020-10 --- Caledonian and Pre-Caledonian orogenic events in Shetland, Scotland: evidence from garnet Lu–Hf and Sm–Nd geochronology / S. Walker, A. F. Bird, M. F. Thirlwall and R. A. Strachan / Geological Society, London, Special Publications, 503, 305-331, 14 September 2020, https://doi.org/10.1144/SP503-2020-32 --- Tectonic history across the Iapetus suture zone in Ireland / Brian McConnell, Nancy Riggs and Tobias Fritschle / Geological Society, London, Special Publications, 503, 333-345, 23 June 2020, https://doi.org/10.1144/SP503-2019-233 --- A slab failure origin for the Donegal composite batholith, Ireland as indicated by trace-element geochemistry / Donnelly B. Archibald and J. Brendan Murphy / Geological Society, London, Special Publications, 503, 347-370, 29 May 2020, https://doi.org/10.1144/SP503-2020-6 --- Tectonic evolution of Anglesey and adjacent mainland North Wales / D. I. Schofield, A. G. Leslie, P. R. Wilby, R. Dartnall, J. W. F. Waldron and R. S. Kendall / Geological Society, London, Special Publications, 503, 371-390, 8 June 2020, https://doi.org/10.1144/SP503-2020-9 --- Petrogenesis of Siluro-Devonian rhyolites of the Tobique Group in the northwestern Appalachians (northern New Brunswick, Canada): tectonic implications for the accretion history of peri-Gondwanan terranes along the Laurentian margin / Jaroslav Dostal, Reginald A. Wilson and Pierre Jutras / Geological Society, London, Special Publications, 503, 391-407, 1 June 2020, https://doi.org/10.1144/SP503-2019-229 --- Arc and slab-failure magmatism of the Taconic Orogeny, western New England, USA / Robert S. Hildebrand and Joseph B. Whalen / Geological Society, London, Special Publications, 503, 409-422, 29 May 2020, https://doi.org/10.1144/SP503-2019-247 --- Evolution of late Paleozoic shearing in the Cobequid Highlands: constraints on the fragmentation of the Appalachian Orogen in Nova Scotia along intra-continental shear zones / David J. W. Piper and Georgia Pe-Piper / Geological Society, London, Special Publications, 503, 423-442, 20 May 2020, https://doi.org/10.1144/SP503-2019-239 --- Structure and stratigraphy in the Pennsylvanian tectonic zone of southern New Brunswick, Canada: the ‘Maritime coastal disturbance’ revisited / Adrian F. Park and Steven J. Hinds / Geological Society, London, Special Publications, 503, 443-468, 9 July 2020, https://doi.org/10.1144/SP503-2019-234 --- Gondwanan fragments in the southern Appalachians / A. J. Dennis, B. V. Miller, J. P. Hibbard, E. Tappa and R. C. Thunell / Geological Society, London, Special Publications, 503, 469-480, 27 July 2020, https://doi.org/10.1144/SP503-2019-249 --- Permian igneous clasts from the Matzitzi Formation, southern Mexico: isotopic constraints on the final amalgamation of Pangaea / Sandra Juárez-Zúñiga, Luigi A. Solari and Carlos Ortega-Obregón / Geological Society, London, Special Publications, 503, 481-496, 22 May 2020, https://doi.org/10.1144/SP503-2019-238 --- Updated geochronology and isotope geochemistry of the Vila de Cruces Ophiolite: a case study of a peri-Gondwanan back-arc ophiolite / Sonia Sánchez Martínez, Ricardo Arenas, Richard Albert, Axel Gerdes and Javier Fernández-Suárez / Geological Society, London, Special Publications, 503, 497-530, 29 May 2020, https://doi.org/10.1144/SP503-2020-8 --- Reconstructing the pre-Variscan puzzle of Cambro-Ordovician basement rocks in the southwestern European margin of Gondwana / J. Javier Álvaro, Josep Maria Casas and Cecilio Quesada / Geological Society, London, Special Publications, 503, 531-562, 29 September 2020, https://doi.org/10.1144/SP503-2020-89 --- Neoproterozoic–paleozoic detrital sources in the Variscan foreland of northern Iberia: primary v. recycled sediments / G. Gutiérrez-Alonso, A. López-Carmona, E. Núñez-Guerrero, A. Martínez García, J. Fernández-Suárez, D. Pastor-Galán, J. C. Gutiérrez-Marco, E. Bernárdez, J. R. Colmenero, M. Hofmann and U. Linnemann / Geological Society, London, Special Publications, 503, 563-588, 27 July 2020, https://doi.org/10.1144/SP503-2020-21 --- Geochronology of the Iberian Pyrite Belt and the Sierra Norte Batholith: lower plate magmatism during supercontinent amalgamation? / Lori E. Paslawski, James A. Braid, Cecilio Quesada and C. M. McFarlane / Geological Society, London, Special Publications, 503, 589-617, 22 July 2020, https://doi.org/10.1144/SP503-2020-5 --- Isotope geochemistry evidence for Laurussian-type sources of South Portuguese Zone Carboniferous turbidites (Variscan Orogeny) / Manuel Francisco Pereira, Cristina Gama, Ícaro Dias da Silva, José Manuel Fuenlabrada, José Brandão Silva and Jorge Medina / Geological Society, London, Special Publications, 503, 619-642, 20 May 2020, https://doi.org/10.1144/SP503-2019-163

Pages: Online-Ressource (VII, 664 Seiten) , Illustrationen, Diagramme, Karten

ISBN: 9781786204929

URL: https://sp.lyellcollection.org/content/503/1

Language: English

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Variable Variscan thermal rejuvenation in the St Malo region, Cadomian Orogen, France: evidence from 40Ar/39Ar mineral ages (1993)

DALLMEYER, R. DAVID ; BROWN, MICHAEL ; D'LEMOS, RICHARD S. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of metamorphic geology 11 (1993), S. 0

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ISSN: 1525-1314

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences

Notes: Abstract The St Malo region in north-west France contains migmatites and anatectic granites derived by partial melting of metasedimentary protoliths during Cadomian orogenesis at c. 540 Ma. Previously reported Rb–Sr model ages for muscovite and biotite range from c. 550 to c. 300 Ma, and suggest variable resetting of mineral isotopic systems. These rocks display microscopic evidence for variably intense Cadomian intracrystalline plastic strain but record no obvious evidence of penetrative Palaeozoic regional deformation. 40Ar/39Ar mineral ages have been determined to evaluate better the extent, timing and significance of Palaeozoic overprinting.Eleven muscovite concentrates and one whole-rock phyllite have been prepared from various units exposed in the St Malo and adjacent Mancellian regions. In the Mancellian region, muscovite from two facies of the Bonnemain Granite Complex record 40Ar/39Ar plateau ages of c. 527 and 521 Ma. An internally discordant 40Ar/39Ar release spectrum characterizes muscovite from protomylonitic granite within the Cadomian Alexain-Deux Evailles-Izé Granite Complex, and probably records the effects of Variscan displacement along the North Armorican Shear Zone. Muscovite concentrates from anatectic granite and from Cadomian mylonites along ductile shear zones within the north-western sector of the St Malo region exhibit internally discordant 40Ar/39Ar release spectra which suggest variable and partial late Palaeozoic rejuvenation. By contrast, muscovite concentrates from samples of variably mylonitic Brioverian metasedimentary rocks exposed within the south-eastern sector of the St Malo region display internally concordant apparent age spectra which define plateaux of 326–320 Ma. A whole-rock phyllite sample from Brioverian metasedimentary rocks exposed along the eastern boundary of the St Malo region displays an internally discordant argon release pattern which is interpreted to reflect the effects of a partial late Palaeozoic thermal overprint. Muscovite from the Plélan granite, part of the Variscan Plélan-Bobital Granite Complex, yields a 40Ar/39Ar plateau age of c. 307 Ma.The 40Ar/39Ar results indicate that Cadomian rocks of the St Malo region have undergone a widespread and variable Palaeozoic (Carboniferous) rejuvenation of intracrystalline argon systems which apparently did not affect the Mancellian region. This rejuvenation was not accompanied by penetrative regional deformation, and was probably of a static thermal–hydrothermal origin. The heat source for rejuvenation was probably either the result of heating during Variscan extension or advection from Variscan granites which are argued to underlie the St Malo region.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1525-1314.1993.tb00136.x

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Variable Variscan thermal rejuvenation in the St Malo region, Cadomian Orogen, France: evidence from40Ar/39Ar mineral ages (1993)

DALLMEYER, R. DAVID ; BROWN, MICHAEL ; D'LEMOS, RICHARD S. ; [et al.]

Wiley

In: Journal of Metamorphic Geology. 1993; 11(1): 137-154. Published 1993 Jan 01. doi: 10.1111/j.1525-1314.1993.tb00136.x.

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Publication Date: 1993-01-01

Print ISSN: 0263-4929

Electronic ISSN: 1525-1314

Topics: Geosciences

Published by Wiley

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Pannotia to Pangaea: Neoproterozoic and Paleozoic Orogenic Cycles in the Circum-Atlantic Region: a celebration of the career of Damian Nance (2020)

Murphy, J. Brendan ; Strachan, Robin A. ; Quesada, Cecilio

Geological Society of London

In: Special Publications / Geological Society London. 2020; SP503-2020-213. Published 2020 Sep 22. doi: 10.1144/sp503-2020-213. [early online release]

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Publication Date: 2020-09-22

Print ISSN: 0305-8719

Electronic ISSN: 2041-4927

Topics: Geosciences

Published by Geological Society of London

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Late Carboniferous dextral transpressional reactivation of the crustal-scale Walls Boundary Fault, Shetland: the role of pre-existing structures and lithological heterogeneities (2020)

Armitage, Timothy B. ; Watts, Lee M. ; Holdsworth, Robert E. ; [et al.]

Geological Society of London

In: Journal of the Geological Society. 2020; jgs2020-078. Published 2020 Sep 25. doi: 10.1144/jgs2020-078. [early online release]

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Publication Date: 2020-09-25

Description: The Walls Boundary Fault in Shetland, Scotland, formed during the Ordovician–Devonian Caledonian orogeny and underwent dextral reactivation in the Late Carboniferous. In a well-exposed section at Ollaberry, westerly verging, gently plunging regional folds in the Neoproterozoic Queyfirth Group on the western side of the Walls Boundary Fault are overprinted by faults and steeply plunging Z-shaped brittle–ductile folds that indicate contemporaneous right-lateral and top-to-the-west reverse displacement. East of the Walls Boundary Fault, the Early Silurian Graven granodiorite complex exhibits fault-parallel fractures with Riedel, P and conjugate shears indicating north–south-striking dextral deformation and an additional contemporaneous component of east–west shortening. In the Queyfirth Group, the structures are arranged in geometrically and kinematically distinct fault-bounded domains that are interpreted to result from two superimposed tectonic events, the youngest of which displays evidence for bulk dextral transpressional strain partitioning into end-member wrench and contractional strain domains. During dextral transpressional deformation, strain was focused into pelite horizons and favourably aligned pre-existing structures, leaving relicts of older deformation in more competent lithologies. This study highlights the importance of pre-existing structures and lithological heterogeneity during reactivation and suggests the development of a regional transpressional tectonic environment during the Late Carboniferous on the Shetland Platform.

Print ISSN: 0016-7649

Topics: Geosciences