amphibolite

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Related to Amphibolite Facies: Blueschist Facies, Granulite Facies, Metabasites

am·phib·o·lite

 (ăm-fĭb′ə-līt′)
n.
A metamorphic rock composed chiefly of amphibole and plagioclase feldspar and having little or no quartz.

am·phib′o·lit′ic (-lĭt′ĭk) adj.

amphibolite

(æmˈfɪbəˌlaɪt)
n
(Geological Science) a metamorphic rock consisting mainly of amphibole and plagioclase

am•phib•o•lite

(æmˈfɪb əˌlaɪt)

n.
a metamorphic rock composed of amphibole and plagioclase.
[1825–35]
am•phib`o•lit′ic (-ˈlɪt ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amphibolite - a metamorphic rock composed chiefly of amphibole and plagioclase
amphibole - a mineral or mineral variety belonging to the amphibole group
metamorphic rock - rock altered by pressure and heat
References in periodicals archive ?
In contrast, amphibolitized eclogites are strongly overprinted by amphibolite facies minerals that omphacite only survived in relics.
The conditions of metamorphism of the metabasites of the Arquia Complex in all lithotypes studied along the Central Cordillera reached the amphibolite facies for the garnet-amphibolite without garnet and greenschist facies for the epidote actinolite schists.
Their protolith corresponds to fine- to mediumgrained pelitic sediments, which were affected by a metamorphism reaching the amphibolite facies. They show a porphyroblastic texture with lepidoblastic matrix, which is defined by the alignment of muscovite and graphite.
The Arquia Group is formed by garnet amphibolites, greenschists and mica schists, from basic, volcano-sedimentary and pelitic protoliths, respectively, metamorphosed under greenschist and amphibolite facies conditions (Restrepo & Toussaint, 1976; Arias & Caballero, 1978; Sanchez, 1988; Rios Reyes, et al.., 2008; Marin, 2009; Ruiz-Jimenez, et at, 2012).
The dominant lithology encountered during the drilling was a coarse-grained metamorphic amphibolite facies ultramafic unit.
The other missing sample (12) cannot be plotted on these diagrams because it is at amphibolite facies as a result of contact metamorphism by a Devonian intrusion, as discussed below.
The supracrustal rocks are generally metamorphosed to amphibolite facies, less commonly to granulite facies, and rarely to greenschist facies.
On the basis of geophysical and petrological studies, the Estonian basement can be divided into two major geological units--North Estonian amphibolite facies and South Estonian granulite facies complexes, which are separated from each other by a tectonical boundary (Paldiski-Pskov shear zone) and include six petrological-structural zones: the Tallinn, Alutaguse, Johvi, West Estonian, Tapa, and South Estonian zones (Fig.
From our studies, we determined that the most common assemblage at Dark Ridge is olivine + talc + tremolite + chlorite + chromite, which indicates metamorphism in the amphibolite facies. The samples suggest higher temperature assemblages once existed, possibly granulite facies.
Rocks of the northern structural-formational zone of the Pechenga structure are metamorphosed at the prehnite-pumpellyite to middle stages of the amphibolite facies (Zagorodny et al., 1964; Petrov, 1999).
These are generally deformed and exhibit greenschist facies metamorphism with the development of epidotes- amphibolite facies metamorphism at places.
It is mainly composed by metapelitic rocks with minor intercalated psammitic, semipelitic, metabasic and metacarbonate rocks, which were affected by a metamorphism to upper amphibolite facies regional grade during the Caledonian orogeny, and reveals a very complex tectonic and metamorphic history.