scholarly journals Prolonged Movement on a > 10‐km‐Wide Thrust During Early Paleozoic Orogens in the Gondwana Margin of NW Argentina

Tectonics ◽  
2019 ◽  
Vol 38 (8) ◽  
pp. 3210-3236 ◽  
Author(s):  
Ivan Semenov ◽  
Roberto F. Weinberg ◽  
Richard J. M. Taylor ◽  
Fred Jourdan
Keyword(s):  
Early Paleozoic ◽  
Gondwana Margin

scholarly journals Early Paleozoic accretionary orogens along the Western Gondwana margin

2021 ◽  
Vol 12 (1) ◽  
pp. 109-130 ◽  
Author(s):  
Sebastián Oriolo ◽  
Bernhard Schulz ◽  
Silvana Geuna ◽  
Pablo D. González ◽  
Juan E. Otamendi ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Gondwana Margin

Late Cadomian rifting of the NW Gondwana margin and the reworking of Precambrian crust – evidence from bimodal magmatism in the early Paleozoic Moroccan Meseta

2020 ◽  
pp. 1-24
Author(s):  
Muhammad Ouabid ◽  
Carlos J. Garrido ◽  
Houssa Ouali ◽  
Jason Harvey ◽  
Károly Hidas ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Gondwana Margin ◽  
Nw Gondwana

Early Cambrian multiple-sourced plutonism in the Eastern Sierras Pampeanas, Córdoba, Argentina: Implications for the evolution of the early Paleozoic Gondwana margin

2021 ◽  
Vol 106 ◽  
pp. 103048
Author(s):  
Alina M. Tibaldi ◽  
Juan E. Otamendi ◽  
Alejandro H. Demichelis ◽  
Matías G. Barzola ◽  
Fernando Barra ◽  
...  
Keyword(s):  
Early Cambrian ◽  
Early Paleozoic ◽  
Sierras Pampeanas ◽  
Eastern Sierras Pampeanas ◽  
Gondwana Margin

Multiple early Paleozoic volcanic events at the northern Gondwana margin: U–Pb age evidence from the Southern Variscan branch (Sardinia, Italy)

2010 ◽  
Vol 17 (1) ◽  
pp. 44-58 ◽  
Author(s):  
Giacomo Oggiano ◽  
Laura Gaggero ◽  
Antonio Funedda ◽  
Laura Buzzi ◽  
Massimo Tiepolo
Keyword(s):  
Early Paleozoic ◽  
Volcanic Events ◽  
Gondwana Margin

Reconstructing the pre-Variscan puzzle of Cambro-Ordovician basement rocks in the southwestern European margin of Gondwana

2020 ◽  
pp. SP503-2020-89 ◽  
Author(s):  
J. Javier Álvaro ◽  
Josep Maria Casas ◽  
Cecilio Quesada
Keyword(s):  
Late Ordovician ◽  
Early Paleozoic ◽  
Preliminary Step ◽  
External Zone ◽  
Eastern Pyrenees ◽  
Basement Rocks ◽  
Gondwana Margin ◽  
Montagne Noire ◽  
Sardic Phase ◽  
Early Late

AbstractA Cambro-Ordovician palaeogeographical restoration of the southwestern European margin of Gondwana is proposed based on the relative positions of Variscan tectonostratigraphic units. Four palaeogeographical proximal–distal transects are recognized and comprise: (i) the Cantabrian, West Asturian-Leonese, Central Iberian/Central Armorican and Ossa-Morena/North Armorican zones and domains of the Iberian and Armorican massifs, respectively; (ii) the South Armorican Domain and its lateral prolongation into the Thiviers-Payzac unit and the Occitan Domain, including the transect from the Axial, southern and northern Montagne Noire, and the Albigeois-southern Cévennes unit; (iii) the southern and northern sides of the Canigó Massif in the Eastern Pyrenees; and (iv) the External Zone and the External and Internal nappes of Sardinia. Two geodynamic scenarios are recognized controlled by the presence/absence of: (i) the Furongian–Early Ordovician (Toledanian or ‘lacaune normande’) break-up unconformity across the Ossa-Morena/North Armorican and Central Iberian/Central Armorican belts; (ii) the Early–Late Ordovician (Sardic) Phase across the Occitan and Pyrenean domains and SW Sardinia; and (iii) the migration of peaks in trilobite and cinctan (echinoderm) diversity. Other similar palaeogeographical shifts are recognized in zircon provenance patterns, the occurrence of climatically sensitive subtropical facies and mineral indicators across platform–basinal transects along the Gondwana margin. This multidisciplinary framework is proposed as a preliminary step in the quest to produce more tightly constrained Early Paleozoic reconstructions along southwestern Europe.

Meta-igneous rocks of the West-Carpathian basement, Slovakia: indicators of Early Paleozoic extension and shortening events

2009 ◽  
Vol 180 (6) ◽  
pp. 461-471 ◽  
Author(s):  
Marián Putiš ◽  
Peter Ivan ◽  
Milan Kohút ◽  
Ján Spišiak ◽  
Pavol Siman ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
The South ◽  
Ophiolite Complex ◽  
The North ◽  
Late Cambrian ◽  
Collision Zone ◽  
Gondwana Margin ◽  
Group A ◽  
Arc Setting ◽  
Back Arc

Abstract The paper reviews the main West-Carpathian Early Paleozoic metamorphosed originally sedimentary-magmatic complexes, dated by SHRIMP on zircons, as indicators of crustal extension and shortening events. Igneous precursors of a Layered Amphibolite Complex (LAC) – fractionated upper mantle gabbros to diorites, dated at 503 ± 4 and 492 ± 4 Ma from the North-Veporic, or 480 ± 5 and 450 ± 6 Ma from the Tatric basement are contemporaneous with subaluminous to metaluminous I-type (507 ± 4 Ma, the South-Veporic basement), peraluminous S-type (497 ± 4 Ma, the South-Veporic basement; 516 ± 7, 485 ± 6 and 462 ± 6 Ma, the North-Veporic basement; 497 ± 6, 472 ± 6 and 450 ± 6 Ma, the Tatric basement), alkaline A-type (511 ± 6 Ma, South-Veporic basement) granitic orthogneisses and calcalkaline rhyolitic (482 ± 6 Ma) and dacitic (476 ± 7 Ma) metavolcanics (Gemeric basement), indicating a magmatic immature back arc setting. The ages point to Middle/Late Cambrian, Early and Late Ordovician magmatic phases, coeval with the extension in the northern Gondwana margin. Separation of an inferred Avalonian and/or Galatian terranes distal continental ribbon corresponds with the opening of a Medio-European Basin. A 430-390 Ma dated MP/HP metamorphic event, recorded in the LAC and associated orthogneisses, occurred in the area of thinned immature back arc basin crust due to closure of the Medio-European Basin. Thus a distal Gondwana continental ribbon north of this basin could be an eastward lateral pendant of Armorica, derived from Galatian terrane. Metaophiolites of the Pernek Group (a metagabbrodolerite dated at 371 ± 4 Ma) in the Tatric basement, analogous to island-arc tholeiites and back-arc basin basalts, indicate a back-arc basin setting north of a 430-390 Ma old northward dipping subduction/collision zone, dividing the northward drifting western Galatian terrane microplate from the Gondwana margin. Some metabasites of the Gemeric basement might indicate Late Devonian to Mississippian opening of a peri-Gondwanan Paleotethyan oceanic basin: a 383 ± 3 Ma old remelted metagabbro (482 ± 9 Ma) from the Klátov gneiss-amphibolite complex, ca. 385 Ma old porphyritic metabasite of the Zlatník ophiolite complex, as well as a 350 ± 5 Ma old HP metabasite as tectonic fragment within the Rakovec Group. The closure of Devonian-Mississippian basins, accompanied by medium-pressure (the Pernek Group) to high-pressure (blueschist to eclogitic tectonic fragments in greenschist facies rocks of the Rakovec Group) metamorphism, occurred in late Carboniferous to early Permian, when Paleotethyan realm complexes accreted to a Galatian terrane microplate, the latter represented by the older and the higher-grade Tatric and Veporic basement complexes.

Geodynamic evolution of the early Paleozoic Western Gondwana margin 14°–17°S reflected by the detritus of the Devonian and Ordovician basins of southern Peru and northern Bolivia

2010 ◽  
Vol 18 (2-3) ◽  
pp. 370-384 ◽  
Author(s):  
C.R. Reimann ◽  
H. Bahlburg ◽  
E. Kooijman ◽  
J. Berndt ◽  
A. Gerdes ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Geodynamic Evolution ◽  
Southern Peru ◽  
Gondwana Margin

scholarly journals Rifting and Arc-Related Early Paleozoic Volcanism along the North Gondwana Margin: Geochemical and Geological Evidence from Sardinia (Italy)

2012 ◽  
Vol 120 (3) ◽  
pp. 273-292 ◽  
Author(s):  
Laura Gaggero ◽  
Giacomo Oggiano ◽  
Antonio Funedda ◽  
Laura Buzzi
Keyword(s):  
Early Paleozoic ◽  
Geological Evidence ◽  
The North ◽  
Gondwana Margin ◽  
North Gondwana

scholarly journals Temporal, Isotopic and Spatial Relations of Early Paleozoic Gondwana-Margin Arc Magmatism, Central Transantarctic Mountains, Antarctica

2012 ◽  
Vol 53 (10) ◽  
pp. 2027-2065 ◽  
Author(s):  
John W. Goodge ◽  
C. Mark Fanning ◽  
Marc D. Norman ◽  
Vickie C. Bennett
Keyword(s):  
Spatial Relations ◽  
Arc Magmatism ◽  
Early Paleozoic ◽  
Gondwana Margin ◽  
Transantarctic Mountains
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