Results 141 to 150 of about 871 (186)

Avalonian and Cadomian terranes in North Dobrogea, Romania

Precambrian Research, 2010
Abstract The North Dobrogea orogen is a collage of dismembered terrane fragments between the Moesian platform and East European craton (Baltica). It records Alpine and Variscan deformation, magmatism and metamorphism. Its basement comprises three metamorphic complexes (Boclugea, Megina and Orliga) that are separated by tectonic boundaries.
Ion Balintoni, Constantin Balica, Antoneta Seghedi, Mihai N. Ducea   +3 more
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Gravity modellings of the Cadomian active margin of northern Brittany

Tectonophysics, 2001
Abstract The geometrical relationships existing between the Saint-Brieuc, Saint-Malo and Guingamp units, which form the Cadomian active margin of northern Brittany, have been determined by gravity analyses and 2.5D modelling, correlated with other geophysical (magnetic, seismic, etc.) and geological observations.
Catherine Truffert, Emmanuel Egal, Elisabeth Le Goff, Gabriel Courrioux, Pol Guennoc   +4 more
openaire   +1 more source

The Cadomian orogeny in the Iberian Massif revisited

Geological Society, London, Special Publications
The exposed basement of the Variscan Iberian Massif includes various remains of the accretionary Cadomian orogen that fringed the northwestern margin of Gondwana in the late Neoproterozoic–Terreneuvian. Subduction of the Mirovoi Ocean beneath Gondwana was responsible for the formation of an arc system that was finally accreted to the continental margin.
J. Javier Álvaro, Cecilio Quesada
openaire   +1 more source

Late Proterozoic tectonostratigraphic evolution of the Avalonian and Cadomian terranes

Precambrian Research, 1991
Abstract The Avalonian and Cadomian terranes of the northern Appalachians and western Europe together record a ∼ 700-540 Ma orogenic event characterized by; (1) widespread, late Precambrian arc volcanism and calc-alkaline plutonism; (2) broadly coeval volcanogenic turbidite deposition often accompanied by mafic volcanism; (3) predominantly sinistral ...
R.D. Nance, J.B. Murphy, R.A. Strachan, R.S. D'Lemos, G.K. Taylor   +4 more
openaire   +1 more source

The Cadomian orogeny in the North Armorican Massif: a brief review

Geological Society, London, Special Publications, 1990
The North Armorican Massif (NAM) of NW France is the type locality of the late Precambrian Cadomian orogenic belt. The NAM largely escaped reworking during the Upper Palaeozoic Variscan cycle, with the result that earlier geological relationships are commonly preserved intact. A large part of the Cadomian belt of the NAM comprises variably deformed and
R. S. D’Lemos, R. A. Strachan, C. G. Topley   +2 more
openaire   +1 more source

The Avalonian-Cadomian Belt and related peri-Gondwanan terranes

International Journal of Earth Sciences, 2004
During the past decade it has widely been accepted that the Avalonian-Cadomian belt results from Neoproterozoic to early Paleozoic Andean-type orogeny, that was active at the northern margin of Gondwana. The major imprints of this orogeny are recorded by so-called periGondwanan terranes which faced open oceans during the Neoproterozoic.
W. D�rr, F. Finger, U. Linnemann, G. Zulauf   +3 more
openaire   +1 more source

The Brioverian (Upper Proterozoic) and the Cadomian orogeny in the Armorican Massif

Geological Society, London, Special Publications, 1990
Abstract The Brioverian in Brittany has generally been divided into the volcanogenic Lower Brioverian and the detrital Upper Brioverian, representing respectively the first and second episodes of the Cadomian orogeny, Cadomian I and Cadomian II.
D. Rabu, J. Chantraine, J. J. Chauvel, E. Denis, P. Balé, Ph. Bardy   +5 more
openaire   +1 more source

Short Paper: Cadomian terrane tectonics and magmatism in the Armorican Massif

Journal of the Geological Society, 1989
The North Armorican composite terrane, NW France, is a collage of displaced terranes which result from the amalgamation of Cadomian continental arcs and marginal basin complexes by sinistral transpression along a continental margin above a subduction zone. Early Cadomian arc activity occurred at c.
ROBIN A. STRACHAN, PETER J. TRELOAR, MICHAEL BROWN, RICHARD S. D’LEMOS   +3 more
openaire   +1 more source

Cadomian geodynamic evolution of the northeastern Armorican Massif (Normandy and Maine)

Geological Society, London, Special Publications, 1990
Abstract The oldest Precambrian rocks of the northeastern Armorican Massif are represented by the migmatites and gneisses of La Hague which make up the Lower Proterozoic Pentevrian basement. This is overlain by the low-grade Upper Proterozoic rocks of the Brioverian succession which were affected by Cadomian deformation and plutonism.
L. Dupret, E. Dissler, F Doré, F. Gresselin, J. Le Gall   +4 more
openaire   +1 more source

Late Precambrian M-type granitoid genesis in the Cadomian belt of NW France

Geological Society, London, Special Publications, 1990
Abstract A subduction model has been proposed for the geodynamic evolution of the North Armorican Massif during Upper Proterozoic times. An early period of plutonism (600 ± 20 Ma) is characterized by M-type granitoids with largely intermediate composition.
Graviou, Pierrick, Auvray, Bernard
openaire   +2 more sources