The Evolution of the Rheic Ocean: From Avalonian-Cadomian Active Margin to Alleghenian-Variscan Collision (GSA Special Paper 423)

Cover......Page 1
The Evolution of the Rheic Ocean: From Avalonian-Cadomian
Active Margin to Alleghenian-Variscan Collision......Page 2
ISBN 978-0-8137-2423-2......Page 3
Contents......Page 4
Preface......Page 8
The assembly of West Gondwana—The view from the
Rio de la Plata craton......Page 10
Geodynamic evolution of the northwestern Paleo-Gondwanan margin
in the Moroccan Atlas at the Precambrian-Cambrian boundary......Page 36
The continuum between Cadomian orogenesis and opening of the
Rheic Ocean: Constraints from LA-ICP-MS U-Pb zircon dating
and analysis of plate-tectonic setting (Saxo-Thuringian zone,
northeastern Bohemian Massif, Germany)......Page 70
The Lausitz graywackes, Saxo-Thuringia, Germany—
Witness to the Cadomian orogeny......Page 106
Paleontological data from the Early Cambrian of Germany and
paleobiogeographical implications for the confi guration
of central Perigondwana......Page 152
The Variscan orogeny in the Saxo-Thuringian zone—Heterogenous
overprint of Cadomian/Paleozoic Peri-Gondwana crust......Page 162
Far Eastern Avalonia: Its chronostratigraphic structure revealed by
SHRIMP zircon ages from Upper Carboniferous to Lower Permian
volcanic rocks (drill cores from Germany, Poland, and Denmark)......Page 182
Nd-Sr-Pb isotopic signatures of Neoproterozoic–Early Paleozoic
siliciclastic rocks in response to changing geotectonic regimes:
A case study from the Barrandian area (Bohemian Massif,
Czech Republic)......Page 200
The diversity and geodynamic signifi cance of Late Cambrian (ca. 500 Ma)
felsic anorogenic magmatism in the northern part of the Bohemian
Massif: A review based on Sm-Nd isotope and geochemical data......Page 218
Sm-Nd isotope and trace element study of Late Proterozoic
metabasalts (“spilites”) from the Central Barrandian domain
(Bohemian Massif, Czech Republic)......Page 240
Structural evolution of the Prague synform (Czech Republic) during
Silurian times: An AMS, rock magnetism, and paleomagnetic
study of the Svatý Jan pod Skalou dikes. Consequences for the
nappes emplacement......Page 258
Cadomian and Variscan metamorphic events in the Léon domain
(Armorican Massif, France): P-T data and EMP monazite dating......Page 276
U-Pb depositional age for the upper Barrios Formation (Armorican
Quartzite facies) in the Cantabrian zone of Iberia: Implications for
stratigraphic correlation and paleogeography......Page 296
Contrasting mantle sources and processes involved in a peri-
Gondwanan terrane: A case study of pre-Variscan mafi c intrusives
from the autochthon of the Central Iberian Zone......Page 306
Tectonic evolution of the upper allochthon of the Órdenes complex
(northwestern Iberian Massif): Structural constraints to a
polyorogenic peri-Gondwanan terrane......Page 324
Crustal growth and deformational processes in the northern
Gondwana margin: Constraints from the Évora Massif
(Ossa-Morena zone, southwest Iberia, Portugal)......Page 342
The Lower–Middle Cambrian boundary in the
Mediterranean subprovince......Page 368
Avalonian and Baltican terranes in the Moesian Platform (southern
Europe, Romania, and Bulgaria) in the context of Caledonian
terranes along the southwestern margin of the East European craton......Page 384
Crete and the Minoan terranes:
Age constraints from U-Pb dating of detrital zircons......Page 410
Geological evolution of middle to late Paleozoic rocks in the Avalon
terrane of northern mainland Nova Scotia, Canadian Appalachians:
A record of tectonothermal activity along the northern margin of the
Rheic Ocean in the Appalachian-Caledonide orogen......Page 422
Vestige of the Rheic Ocean in North America:
The Acatlán Complex of southern México......Page 446
Provenance of the Granjeno Schist, Ciudad Victoria, México:
Detrital zircon U-Pb age constraints and implications for the
Paleozoic paleogeography of the Rheic Ocean......Page 462
Ordovician calc-alkaline granitoids in the Acatlán Complex,
southern México: Geochemical and geochronologic data and
implications for the tectonics of the Gondwanan margin of the
Rheic Ocean......Page 474
Ordovician–Devonian oceanic basalts in the Cosoltepec Formation,
Acatlán Complex, southern México: Vestiges of the Rheic Ocean?......Page 486
P-T-t constraints on exhumation following subduction in the
Rheic Ocean from eclogitic rocks in the Acatlán Complex of
southern México......Page 498
Life and death of a Cambrian–Ordovician basin: An Andean threeact
play featuring Gondwana and the Arequipa-Antofalla terrane......Page 520
A Late Ordovician ice sheet in South America:
Evidence from the Cancañiri tillites, southern Bolivia......Page 534
Sedimentary basins in the southwestern Siberian craton: Late
Neoproterozoic–Early Cambrian rifting and collisional events......Page 558
Aluminum phosphate in Proterozoic metaquartzites: Implications for
the Precambrian oceanic P budget and development of life......Page 588
Back cover......Page 602