granulite


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granulite

[′gran·yə‚līt]
(petrology)
Granite that contains muscovite.
A relatively coarse, granuloblastic rock formed at the high temperatures and pressures of the granulite facies.
References in periodicals archive ?
39[degrees]97'E SEF 1556 Plot Parent material 1 Homblende-biotite gneiss 2 Homblende-biotite gneiss 3 Homblende-biotite gneiss 4 Amphibolite 5 Homblende-biotite gneiss 6 Homblende-biotite gneiss 7 Granite gneiss 8 Biotite-pegmatite 9 Granite gneiss 10 Granite gneiss 11 Homblende-biotite gneiss 12 Homblende-biotite gneiss 13 Homblende-biotite gneiss 14 Homblende-biotite granulite 15 Homblende-biotite gneiss 16 Homblende-biotite gneiss 17 Gametiferous pyroxenite granulite 18 Homblende-biotite granulite Table 2.
The 1,742 Ma age we obtained for the zircon inclusion in the greenish blue sapphire coincides with the age of zircons possibly derived from granulites found, for example, in southern Madagascar (Kroner et al.
One might suppose that the middle crust in the SG-3 area can be represented by rocks similar in age and composition of the protoliths to the SG-3 Archaean complex but metamorphosed under conditions of high-temperature amphibolite and granulite facies.
1996, " Proterozoic zones in southern granulite terrain" Gondwana Research group memoir 3 , 77-89
This structure consists of a Proterozoic-age vanadiumrich sedimentary series metamorphosed to the granulite facies but most commonly found as retrograde kyanite-almandine-subfacies rocks of the upper amphibolite facies.
In support of this model, Collins (2002) points out that the mineralogy of many granulite facies complexes requires geothermal gradients between 20[degrees] and 50[degrees]C per km, which is much higher than gradients in collisional environments, but is consistent with those expected in backarc settings.
lt;<Grenvillian granulite facies metamorphism in the Arequipa massif, Peru: a Laurentia-Gondwana link>>.
The Southwestern Group consists of cordierite granulite facies rocks made of cordierite gneisses, calc granulites, and metasediments.
This assumption was strongly based on lithological correlations of granulitic facies rocks with those of the Kola series and on an idea, famous among the Soviet geologists, that the regional granulite facies rocks should be older than their lower-grade counterparts.
The orthopyroxenegarnet-mesopertite, orthoclase-garnet-biotite, and clinopyroxene-quartz are the mineral associations of the granulite facies present in this sequence.
The samples suggest higher temperature assemblages once existed, possibly granulite facies.