amphibolite facies


Also found in: Dictionary, Thesaurus.
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.
Mentioned in ?
References in periodicals archive ?
Their protolith corresponds to medium- to coarse-grained pelitic sediments, which were affected by a metamorphism reaching the amphibolite facies. They show a porphyroblastic texture with granoblastic, lepidogranoblastic and poiquiloblastic matrix.
Un caso de metamorfismo regional tipo Buchan (andalucita-cordierita) en la region Norte del Macizo de Santander, Cordillera Oriental (Colombia)
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].
Pressure-temperature path of Arquia Group rocks (NW Colombia): a petrographic analysis from mineral assemblages
The graphical analysis of greenschist to amphibolite facies mineral assemblages in metabasites.
Very low- and low-grade metamorphism of mafic volcanic rocks of the Mira terrane (Avalonia), southeastern Cape Breton Island, Nova Scotia
The rocks of the Alutaguse zone have metamorphosed under the conditions of the amphibolite facies. In some places (Sonda-Uljaste and Haljala) the rocks show evidence of granulite facies metamorphism.
Outlines of the Precambrian basement of Estonia/Eesti eelkambriumi vanusega aluskorra pohijooni
The rock samples of amphibolite facies show a clear dissimilarity in the acoustopolarigram shape from that of the rocks of prehnite-pumpellyite, greenschist and epidote-amphibolite facies.
PETROPHYSICAL PROPERTIES OF THE PECHENGA ROCKS OF DIFFERENT METAMORPHIC FACIES
Staurolite metabasites of the Silgara Formation at the CSM represent a rare amphibolite facies type.
Primer reporte y significado de las metabasitas con presencia de estaurolita asociadas a una secuencia de rocas calcosilicatadas en la Formacion Silgara de la region central del Macizo de Santander, Colombia
It crosscuts the PPZ and extends into the NEGL, the amphibolite facies terrain.
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
These rocks comprise mylonitic peridotite and sub-ophiolitic metamorphic rocks that range from garnetiferous amphibolites facies to amphibolite facies to greenschist facies and un- metamorphosed sediments.
Facies and distribution of metamorphic rocks beneath the Muslim Bagh ophiolite (NW Pakistan): tectonic implications
However, in many places retrograde assemblages have formed in the conditions of the amphibolite facies.
Svecofennian metamorphic zones in the basement of Estonia/Eesti aluskorra Svekofennia moondevoondid
This lower amphibolite facies metamorphism overprints, in many samples, a pre-existing epidote-hornfels or greenschist assemblage containing epidote + variably sericitised plagioclase + actinolite [+ or -] biotite.
Mafic intrusions on Campobello Island: implications for New Brunswick--Maine correlations
The regional metamorphic mineral assemblages indicate upper amphibolite facies metamorphism.
Petrographic study of coarse aggregate to evaluate their susceptibility to Alkali Silica Reactivity in different rocks of District Shangla Swat Pakistan
Drill core F-156 penetrates volcanic-sedimentary biotite gneisses of amphibolite facies origin in Eastern Estonia.
Fractality in geology: a possible use of fractals in the studies of partial melting processes/Fraktalid geoloogias: fraktalite kasutusvoimalusi osalise ulessulamise protsesside uurimisel

Encyclopedia browser ?
Full browser ?