High-grade metamorphism, dehydration and crustal melting: a reinvestigation based on new experiments in the silica-saturated portion of the system KAlO 2 -MgO-SiO 2 -H 2 O-CO 2 at P ≤ 1.5 GPa

1997 ◽  
Vol 129 (4) ◽  
pp. 308-325 ◽  
Author(s):  
John D. Clemens ◽  
Giles T. R. Droop ◽  
Gary Stevens
Keyword(s):  
Crustal Melting ◽  
High Grade ◽  
Grade Metamorphism ◽  
High Grade Metamorphism

On high-grade metamorphism, crustal melting, migmatites and granites

Lithos ◽  
2010 ◽  
Vol 116 (3-4) ◽  
pp. v-viii
Author(s):  
Michael Brown ◽  
Olav Eklund ◽  
Fawna Korhonen ◽  
Peter Sorjonen-Ward
Keyword(s):  
Crustal Melting ◽  
High Grade ◽  
Grade Metamorphism ◽  
High Grade Metamorphism

scholarly journals Syntectonic crustal melting and high-grade metamorphism in a transpressional regime, Variscan Massif Central, France

2009 ◽  
Vol 477 (3-4) ◽  
pp. 229-243 ◽  
Author(s):  
Aude Gébelin ◽  
Françoise Roger ◽  
Maurice Brunel
Keyword(s):  
Crustal Melting ◽  
High Grade ◽  
Massif Central ◽  
Grade Metamorphism ◽  
High Grade Metamorphism

Sm-Nd garnet and U-Pb monazite dating of high-grade metamorphism and crustal melting in the West Uusimaa area, southern Finland

GFF ◽  
2005 ◽  
Vol 127 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Hassina Mouri ◽  
Markku Väisänen ◽  
Hannu Huhma ◽  
Kalevi Korsman
Keyword(s):  
Crustal Melting ◽  
High Grade ◽  
The West ◽  
Monazite Dating ◽  
Grade Metamorphism ◽  
High Grade Metamorphism

Neoproterozoic extension in the Greater Dharwar Craton: a reevaluation of the “Betsimisaraka suture” in MadagascarThis article is one of a series of papers published in this Special Issue on the theme of Geochronology in honour of Tom Krogh.

2011 ◽  
Vol 48 (2) ◽  
pp. 389-417 ◽  
Author(s):  
R. D. Tucker ◽  
J.-Y. Roig ◽  
C. Delor ◽  
Y. Amelin ◽  
P. Goncalves ◽  
...  
Keyword(s):  
Dharwar Craton ◽  
High Grade ◽  
Grade Metamorphism ◽  
Continental Extension ◽  
Shrimp Geochronology ◽  
Igneous Activity ◽  
High Grade Metamorphism ◽  
Local Inversion ◽  
Metaigneous Rocks ◽  
Eastern Domain

The Precambrian shield of Madagascar is reevaluated with recently compiled geological data and new U–Pb sensitive high-resolution ion microprobe (SHRIMP) geochronology. Two Archean domains are recognized: the eastern Antongil–Masora domain and the central Antananarivo domain, the latter with distinctive belts of metamafic gneiss and schist (Tsaratanana Complex). In the eastern domain, the period of early crust formation is extended to the Paleo–Mesoarchean (3.32–3.15 Ga) and a supracrustal sequence (Fenerivo Group), deposited at 3.18 Ga and metamorphosed at 2.55 Ga, is identified. In the central domain, a Neoarchean period of high-grade metamorphism and anatexis that affected both felsic (Betsiboka Suite) and mafic gneisses (Tsaratanana Complex) is documented. We propose, therefore, that the Antananarivo domain was amalgamated within the Greater Dharwar Craton (India + Madagascar) by a Neoarchean accretion event (2.55–2.48 Ga), involving emplacement of juvenile igneous rocks, high-grade metamorphism, and the juxtaposition of disparate belts of mafic gneiss and schist (metagreenstones). The concept of the “Betsimisaraka suture” is dispelled and the zone is redefined as a domain of Neoproterozoic metasedimentary (Manampotsy Group) and metaigneous rocks (Itsindro–Imorona Suite) formed during a period of continental extension and intrusive igneous activity between 840 and 760 Ma. Younger orogenic convergence (560–520 Ma) resulted in east-directed overthrusting throughout south Madagascar and steepening with local inversion of the domain in central Madagascar. Along part of its length, the Manampotsy Group covers the boundary between the eastern and central Archean domains and is overprinted by the Angavo–Ifanadiana high-strain zone that served as a zone of crustal weakness throughout Cretaceous to Recent times.

scholarly journals Timing of High-Grade Metamorphism in Madurai Block, South India: Insights from New U-Pb Zircon & Monazite Ages

2020 ◽  
Author(s):  
J Amal Dev ◽  
J K Tomson ◽  
K Anto Francis ◽  
Nilanjana Sorcar ◽  
V Nandakumar
Keyword(s):  
South India ◽  
High Grade ◽  
Grade Metamorphism ◽  
High Grade Metamorphism

scholarly journals Molybdenum-isotope signals and cerium anomalies in Palaeoproterozoic manganese ore survive high-grade metamorphism

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Alexandre Raphael Cabral ◽  
Armin Zeh ◽  
Nívea Cristina Vianna ◽  
Lukáš Ackerman ◽  
Jan Pašava ◽  
...  
Keyword(s):  
Manganese Ore ◽  
High Grade ◽  
Molybdenum Isotope ◽  
Grade Metamorphism ◽  
High Grade Metamorphism
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