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Showing 1 to 8 of 8 for “"pelitic schists"”.
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Graphite-bearing and graphite-depleted basement rocks in the Dufferin Lake Zone, south-central Athabasca Basin, Saskatchewan
… in the Dufferin Lake zone are variably graphitic pelitic schists (VGPS); altered to chlorite and hematite (Red/Green Zone: RGZ), and locally bleached equivalents near the unconformity during paleoweathering or later fluid interactions. These altered zones are texturally similar rocks within …
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Eo-Variscan Orogenesis in the Guilleries Massif, Catalan Coastal Ranges, Northeastern Spain Recorded by U-Th-Pb ages of Monazite Inclusions in Metamorphic Garnet
… the Variscan Orogeny is recorded in high grade pelitic schists of the Guilleries Massif of the Catalan Coastal Ranges of northeastern Spain which preserve multiple rounds of deformation and metamorphism. The massif records a classic Variscan low-pressure and high-temperature metamorphic field …
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Metamorphism in the Northern Front Range, Colorado
… generated migmatites by wet melting, whereas the pelitic schists and gneisses in the HPB generated migmatites by dehydration melting of muscovite and biotite. Biotite dehydration melting enriched the leucosomes in HPB pelitic migmatites in K-feldspar and garnet. The minor presence of late …
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The tectonic evolution of the Altavista area, Southwest Virginia Piedmont
… conditions during this event. The Evington Group pelitic schists and gneisses in Altavista exhibit an inverted prograde metamorphism and subsequent retrogression. The Pressure·temperature path for these rocks forms the lower part of a loop from high pressure to lower pressure and higher …
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On Ultra-High Temperature Metamorphism in the Mid-Lower Crust
… intrusion of six mafic plutons and contains pelitic xenoliths that experienced extensive interaction with Mg-rich basaltic melt. The complex is an excellent natural example of ultra-high temperature (UHT) metamorphic processes and country rock-magma interaction due to mappable units of hybrid …
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Geology of the Ashe Formation between Fries and Galax, Virginia
… a series of late Precambrian gneisses, pelitic schists and amphibolites, and the underlying Cranberry Gneiss. The dominant penetrative foliation of the rocks is composed of an early S₁ foliation that is crenulated and transposed by a later S₂ foliation which strikes N 50° E and dips SE. …
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Structural Style and Regional Comparison of the Paleoproterozoic Ketyet River Group in the Region North-Northwest of Baker Lake, Nunavut
… overlain by orthoquartzite and grey pelitic schist. At Bar Lake, sills of metagabbro within the latter may be equivalent to the Five Mile Lake basalts, substantiating correlation with the Amer Group. The metaconglomerate and orthoquartzite unconformably overlie 2.6 Ga …