amphibolite facies


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Related to amphibolite facies: Blueschist Facies, Granulite Facies, Metabasites

amphibolite facies

[am′fib·ə‚līt ′fā‚shēz]
(petrology)
Rocks produced by medium- to high-grade regional metamorphism.
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References in periodicals archive ?
Deep drillings revealed a zone of microcline granites and granite migmatites intruding metamorphic rocks of the granulite or amphibolite facies.
The concept of Baltic-Belarus arc-shaped granulite belts (Gorbatschev & Bogdanova 1993) recently raised doubts again, because in Central Latvia, the Inchukalns N-S trending amphibolite facies belt replaces the granulites of North Latvia, and in East Latvia, the large Daugavpils gneissose granite massif forms the basement (Puura 1980).
Orogenic structures of the Precambrian basement of Estonia as revealed from the integrated modelling of the crust / Eesti aluskorra orogeenne struktuur kompleksse magnetvalja ja raskusjouvalja modelleerimise andmetel
In western Estonia, metabasites of the amphibolite facies dominate.
Metamorphic domes in northern and northeastern Estonia diversify the generally amphibolite facies complexes of the Tallinn and Alutaguse zones.
Svecofennian metamorphic zones in the basement of Estonia/Eesti aluskorra Svekofennia moondevoondid
The intrusions in the Quoddy Formation exhibit a similar metamorphic history, but amphibolite facies assemblages do not occur everywhere and are not well developed where present.
Mafic intrusions on Campobello Island: implications for New Brunswick--Maine correlations
Rocks with lower amphibolite facies assemblages were faulted and subsequently retrograded to lower greenschist facies.
The lower amphibolite facies assemblage is homblende-plagioclase-titanite-magnetite, but these rocks are most commonly extensively retrograded.
Minimum age of the Neoproterozoic Seven Hundred Acre Island Formation and the tectonic setting of the Islesboro Formation, Islesboro block, Maine
Then, a progressive metamorphism in these rocks is marked by the passing of greenschist facies mineralogy [actinolite + chlorite + quartz + plagioclase (albite) + epidote minerals [+ or -] muscovite [+ or -] calcite] to epidote-amphibolite facies mineralogy [hornblende + epidote minerals + quartz + albite [+ or -] garnet], and finally to amphibolite facies mineralogy [hornblende + garnet + plagioclase [+ or -] quartz].
8 kbar, whereas those with mineral assemblages formed under epidote-amphibolite and amphibolite facies reached values of 696[degrees]C and 14.
Pressure-temperature path of Arquia Group rocks (NW Colombia): a petrographic analysis from mineral assemblages
4) RA(PP) = Prehnite-Actinolite (Prehnite-Pumpellyite) subfacies; RA = Prehnite-Actinolite facies; GS = Greenschist facies; AMPH= Amphibolite facies (abbreviations from Miyazaki and Okumura (2002)).
Very low- and low-grade metamorphism of mafic volcanic rocks of the Mira terrane (Avalonia), southeastern Cape Breton Island, Nova Scotia
Metamorphic grade in the Duquet and Fagnant belts (and in the core of the Qalluviartuuq-Payne belt) is at green-schist or lower amphibolite facies, with P and T conditions as low as about 525[degrees]C and 3 kbar (Percival and Skulski 2000; Ciesielski 2000; Madore et al.
Government geoscience stimulates mineral exploration in the superior province, Northern Quebec
Based on petrographic and geochemical similarities, the North Estonian amphibolite facies rocks were believed to belong to a section of Svecofennian rocks cropping out in southern Finland.
Outlines of the Precambrian basement of Estonia/Eesti eelkambriumi vanusega aluskorra pohijooni

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