Petrogenesis of a Neoproterozoic magmatic arc hosting porphyry Cu-Au mineralization at Jebel Ohier in the Gebeit Terrane, NE Sudan

2016 ◽  
Vol 79 ◽  
pp. 133-154 ◽  
Author(s):  
F.P. Bierlein ◽  
N. Reynolds ◽  
D. Arne ◽  
C. Bargmann ◽  
S. McKeag ◽  
...  
Keyword(s):  
Magmatic Arc ◽  
Porphyry Cu ◽  
Neoproterozoic Magmatic Arc

Latest Cretaceous-early Paleogene “boom” of porphyry Cu mineralization associated with the Laramide magmatic arc of Mexico

2017 ◽  
Vol 81 ◽  
pp. 1113-1124 ◽  
Author(s):  
Martín Valencia-Moreno ◽  
Antoni Camprubí ◽  
Lucas Ochoa-Landín ◽  
Thierry Calmus ◽  
Héctor Mendívil-Quijada
Keyword(s):  
Magmatic Arc ◽  
Porphyry Cu ◽  
Early Paleogene

Petrogenesis of gabbroic intrusions in the Valerianov-Beltau-Kurama magmatic arc, Uzbekistan: The role of arc maturity controlling the generation of giant porphyry Cu—Au deposits

Lithos ◽  
2018 ◽  
Vol 320-321 ◽  
pp. 75-92 ◽  
Author(s):  
Zhiguo Cheng ◽  
Zhaochong Zhang ◽  
A. Turesebekov ◽  
B.S. Nurtaev ◽  
Lijuan Xu ◽  
...  
Keyword(s):  
Magmatic Arc ◽  
Porphyry Cu

Neoproterozoic magmatic arc systems of the central Ribeira belt, SE-Brazil, in the context of the West-Gondwana pre-collisional history: A review

2020 ◽  
Vol 103 ◽  
pp. 102710 ◽  
Author(s):  
Monica Heilbron ◽  
Claudio de Morisson Valeriano ◽  
Caroline Peixoto ◽  
Miguel Tupinambá ◽  
Franz Neubauer ◽  
...  
Keyword(s):  
The West ◽  
Magmatic Arc ◽  
West Gondwana ◽  
Se Brazil ◽  
Neoproterozoic Magmatic Arc

Dehydration, melting and related garnet growth in the deep root of the Amalaoulaou Neoproterozoic magmatic arc (Gourma, NE Mali)

2008 ◽  
Vol 146 (2) ◽  
pp. 173-186 ◽  
Author(s):  
JULIEN BERGER ◽  
RENAUD CABY ◽  
JEAN-PAUL LIÉGEOIS ◽  
JEAN-CLAUDE C. MERCIER ◽  
DANIEL DEMAIFFE
Keyword(s):  
Solid State ◽  
Island Arc ◽  
Solid State Reactions ◽  
Garnet Growth ◽  
Main Body ◽  
Dehydration Melting ◽  
Early Generation ◽  
Magmatic Arc ◽  
Neoproterozoic Magmatic Arc ◽  
Arc Root

AbstractThe Amalaoulaou Neoproterozoic island-arc massif belongs to the Gourma belt in Mali. The metagabbros and pyroxenites forming the main body of this arc root show the pervasive development of garnet. In the pyroxenites, the latter has grown by reaction between pyroxene and spinel during isobaric cooling. By contrast, in the metagabbros, garnet textures and relations to felsic veins exclude an origin through solid-state reactions only. It is proposed that garnet has grown following dehydration and localized melting of amphibole-bearing gabbros at the base of the arc. The plagioclase-saturated melts represented by anorthositic veins in the metagabbros and by trondhjemites in the upper part of the massif provide evidence for melting in the deep arc crust, which locally generated high-density garnet–clinopyroxene–rutile residues. Garnet growth and melting began around 850 °C at 10 kbar and the tonalitic melts were most probably generated around 1050 °C at P ≥ 10 kbar. This HT granulitic imprint can be related to arc maturation, leading to a P–T increase in the deep arc root and dehydration and/or dehydration-melting of amphibole-bearing gabbros. Observation of such features in the root of this Neoproterozoic island arc has important consequences, as it provides a link to models concerning the early generation of continental crust.

The Pengguan tectonic dome of Longmen Mountains, Sichuan Province: Mesozoic denudation of a Neoproterozoic magmatic arc-basin system

2008 ◽  
Vol 51 (11) ◽  
pp. 1545-1559 ◽  
Author(s):  
DanPing Yan ◽  
MeiFu Zhou ◽  
GuoQing Wei ◽  
JianFeng Gao ◽  
ShaoFeng Liu ◽  
...  
Keyword(s):  
Sichuan Province ◽  
Magmatic Arc ◽  
Neoproterozoic Magmatic Arc ◽  
Basin System
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