Petrogenesis of Late Devonian–Early Carboniferous volcanic rocks in northern Tibet: New constraints on the Paleozoic tectonic evolution of the Tethyan Ocean

2017 ◽  
Vol 41 ◽  
pp. 142-156 ◽  
Author(s):  
Baodi Wang ◽  
Liquan Wang ◽  
Jianlin Chen ◽  
Han Liu ◽  
Fuguang Yin ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Volcanic Rocks ◽  
Early Carboniferous ◽  
Late Devonian ◽  
Northern Tibet

Tectonic evolution of southwestern Newfoundland as indicated by granitoid petrogenesis

1985 ◽  
Vol 22 (7) ◽  
pp. 1080-1092 ◽  
Author(s):  
Derek H. C. Wilton
Keyword(s):  
Fault Zone ◽  
Point Group ◽  
Volcanic Rocks ◽  
Early Carboniferous ◽  
Late Devonian ◽  
Partial Melt ◽  
Show Evidence ◽  
Partial Melts ◽  
Felsic Volcanic ◽  
Host Rocks

Four granitoid suites are recognized in the region of the Cape Ray Fault Zone of southwestern Newfoundland. The two oldest (Ordovician–Silurian (?)) suites represent partial melts of their enclosing host rocks. The Port aux Basques granite is modelled as a partial melt of the gneissic component of its host, Port aux Basques Complex. The Cape Ray granite forms a dominantly tonalitic terrane derived by partial melting of ophiolitic material. The Red Rocks granite and a megacrystic phase of the Cape Ray granite form coherent lines of geochemical descent from the parental tonalite but show evidence of some continental crust contamination.The Late Devonian Windowglass Hill granite is a subvolcanic equivalent of felsic volcanic rocks in the Windsor Point Group. Both units were derived as partial melts of continental crust.The post-tectonic, Late Devonian to Early Carboniferous Strawberry and Isle aux Morts Brook granites constitute the youngest granitoid suite in the region. These A-type granitoids were derived as partial melts of an underlying depleted granulitic (felsic) crust. The depleted nature of the source may have resulted from previous generation of the Windowglass Hill granite and Windsor Point Group. The only possible protolith for the granulitic source is Precambrian Grenvillian gneiss. The presence of this gneiss beneath the Cape Ray Fault Zone of southwestern Newfoundland implies that the complete series of lithologies is allochthonous.

Geochronology and geochemistry of the Late Devonian–Early Carboniferous volcanic rocks in Aksu River area, western end of the East Kunlun Orogen

2020 ◽  
Vol 55 (4) ◽  
pp. 2881-2901
Author(s):  
Xin Xu ◽  
Changfeng Liu ◽  
Wencan Liu ◽  
Baoying Ye ◽  
Zixian Zhao ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Early Carboniferous ◽  
Late Devonian ◽  
East Kunlun

Implications of spore evidence for Late Devonian age of the Piskahegan Group, southwestern New Brunswick

1988 ◽  
Vol 25 (9) ◽  
pp. 1349-1364 ◽  
Author(s):  
D. C. McGregor ◽  
S. R. McCutcheon
Keyword(s):  
New Brunswick ◽  
Eastern Europe ◽  
Volcanic Rocks ◽  
Early Carboniferous ◽  
Surface Expression ◽  
Alluvial Fan ◽  
Late Devonian ◽  
Red Sandstone ◽  
Stratigraphic Position ◽  
Devonian Age

The predominantly volcanic Piskahegan Group has commonly been considered Early Carboniferous, based on its stratigraphic position. However, spores recently discovered in the Carrow Formation, an alluvial fan deposit in the exocaldera facies, indicate that most, if not all, of the group is of Late Devonian (late Famennian) age. The spore assemblage includes several species reported previously from Ireland, Belgium, and eastern Europe, some of them apparently restricted to the southern parts of the Old Red Sandstone Continent in Late Devonian time. Comparison of records of earliest occurrences suggests that the incoming of some species was diachronous. Volcanic rocks of the Piskahegan Group are coeval with post-Acadian, tin–tungsten-bearing granites elsewhere in New Brunswick and are considered the surface expression of plutonism that resulted from Acadian continental collison.

The Polish Sudetes: Caledonian or Variscan?

1999 ◽  
Vol 90 (2) ◽  
pp. 127-146 ◽  
Author(s):  
P. Aleksandrowski ◽  
R. Kryza ◽  
S. Mazur ◽  
C. Pin ◽  
J. A. Zalasiewicz
Keyword(s):  
Tectonic Evolution ◽  
Structural Data ◽  
Early Carboniferous ◽  
Continental Collision ◽  
Tectonic Activity ◽  
Late Devonian ◽  
Early Permian ◽  
Granite Intrusion ◽  
Form Part ◽  
Early Palaeozoic

AbstractThe Polish Sudetes on the NE margin of the Bohemian Massif comprise a complex mosaic of pre-Permian basement units, traditionally included in the Variscides. A hypothesis of significant Caledonian orogenesis in this area originated in the 1920s, was subsequently rejected, and then was recently revived in models which invoked Early Palaeozoic to Early-Mid Devonian subduction and continental collision along a proposed extension of the Tornquist suture zone. We reassess the evidence invoked in support of the Caledonian orogeny, such as supposed regional pre-Upper Devonian unconformity, Ordovician bimodal magmatism and radiometric, palaeontological, palaeomagnetic and structural data, and suggest these are either inconclusive or misinterpreted. On the other hand, the Sudetes record Mid?-Late Devonian blueschist metamorphism followed by an Early Carboniferous regional high temperature event, widespread Late Devonian/Early Carboniferous flysch/molasse sedimentation and abundant granite intrusion in the Carboniferous to Early Permian. We discuss the usage of the term ‘Caledonian’ in a plate tectonic context and suggest it should not be used simply to denote Early to Mid-Palaeozoic tectonic activity. The tectonic evolution of the Sudetes was temporally different from, and resulted from convergence of different crustal domains than that of the British-Scandinavian-Pomeranian Caledonides. The Sudetic Palaeozoic sequences most probably developed on Armorican Neoproterozoic crust and in adjacent oceanic(?) domains and, therefore, the Sudetes form part of the Variscan orogenic belt.

scholarly journals Tectonic Evolution of the Eastern Moroccan Meseta: From Late Devonian Forearc Sedimentation to Early Carboniferous Collision of an Avalonian Promontory

Tectonics ◽  
2020 ◽  
Vol 39 (7) ◽  
Author(s):  
Cristina Accotto ◽  
David Martínez Poyatos ◽  
Antonio Azor ◽  
Antonio Jabaloy‐Sánchez ◽  
Cristina Talavera ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Early Carboniferous ◽  
Late Devonian
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