Metabasites

Metabasites

 

metamorphic rocks formed as a result of the metamorphism of basic igneous rocks. The metabasites include metamorphosed diabases, gabbros, diorites, and sometimes schists and amphibolites.

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The range consists of metamorphic materials from the Internal Zones (phyllites, quartzites, metabasites, sandstones, marbles) in addition to Neogene marine sediments.
Petrogenetic significance of orthopyroxene-free garnet + clinopyroxene + plagioclase [+ or -] quartz-bearing metabasites with respect to the amphibolite and granulite facies, Journal of Metamorphic Geology.
Mainly amphibolite facies crystalline schists were formed by metamorphism of monotonous metasediments with minor amounts of volcano-sedimentary series containing metabasites.
The host rocks are a series of sheared and altered shales, siltstones and metabasites within the Mitakoodi Quarzites of the Proterozoic Malbon Group.
The interpretation of AMS in structural terms of resulting rock types: metabasites, schists and quartzites, has to rely on previous identification of what mineral phases are contributing to the bulk AMS (e.
In the Sona Peninsula, the upper Rio San Rafael section displays various outcrops of metabasites with E-W schistosity planes.
In western Estonia, metabasites of the amphibolite facies dominate.
9 Ga; Bjork 1986) volcano-sedimentary rocks dominated by felsic, alkali-rich metavolcanics, metabasites, argillitic schists and marbles of greenschist to amphibolite facies grade (e.
However, further east protoliths of oceanic affinity for metabasites of the Arquia Complex and volcanic rocks of the Quebradagrande Complex (Ruiz et al.
The geochemistry of post-kinematic mafic dike swarms and subophiolitic metabasites Pozanti-Karsanti ophiolite Turkey: evidence for ridge subduction.
This group of rocks consists of three main lithologies: (i) a monotonous sequence of schists and quartz-schists; (ii) fine-grained gneisses with intercalations or boudins of schists and metabasites; and (iii) metabasites which, in the vicinity of the gneisses, contain boudins of fine-grained gneisses and schists.