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General Characteristics of Migmatites and Migmatite Terranes
1999Structures and structural relationships resulting from superimposed deformation have long been recognized by geologists, and references to this perception can be found in the literature at least as far back as the late nineteenth century (Clough, The Geology of Cowal (Gunn et al, 1897, pp. 23, 24), and here, under ‘Fold (Structure) sets’, section 5.3),
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Fluid inclusions in migmatites
1985The fluid inclusions provide petrologists with the only direct method for studying a possible metamorphic fluid from a high P-T environment. Basic principles of a fluid inclusion study are as old as modern petrography (Sorby, 1858), but only in recent years have advances in the technology (heating-freezing stages), and in the understanding of fluid ...
J. Touret, Sakiko N. Olsen
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Killarney Gneisses and Migmatites
Geological Society of America Bulletin, 1927Introduction The Huronian sediments, which stretch almost unbroken from the western end of Lake Superior to a line between Killarney and Lake Temiskaming, end abruptly against an area of gneisses. This area of gneisses, previously thought to be of pre-Huronian age, is now known to be composed in part of rocks younger than the Huronian sediments and ...
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Deformational behaviour of migmatites and problems of structural analysis in migmatite terrains
Geological Magazine, 1984AbstractAn understanding of the response of migmatites to deformation is crucial to an interpretation of their structures, and in anatectic and intrusive migmatite terrains due consideration must be given to the modification of deformation processes imposed by melts.
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The Migmatite Area Around Bettyhill, Sutherland
Quarterly Journal of the Geological Society of London, 1943Summary The Migmatization of pelitic, semipelitic, siliceous and hornblendic (Durcha type) rocks of the Moine Series is a record of a lengthy series of metasomatic changes brought about by the activity of alkaline solutions. Pelitic gneisses are converted by soda-metasomatism into permeation-gneisses. Semipelitic granulites give rise to augen-
Yu-Chi Cheng, H. H. Read
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Localised non-migmatitic UHT domains within thermally buffered migmatites
Goldschmidt2023 abstracts, 2023Samantha March +3 more
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1985
The migmatite problem has always been interrelated with the granite problem. The long and sometimes heated debates of the granite controversy between ‘magmatists’ and ‘transformationists’ were ended, for the time being, by Tuttle and Bowen (1958). Their study also convinced many geologists that migmatites were the product of simple partial melting and ...
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The migmatite problem has always been interrelated with the granite problem. The long and sometimes heated debates of the granite controversy between ‘magmatists’ and ‘transformationists’ were ended, for the time being, by Tuttle and Bowen (1958). Their study also convinced many geologists that migmatites were the product of simple partial melting and ...
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1985
The Moines (summaries in Johnstone, 1975; Johnson et al., 1979; Johnson, 1983) are a series of late Precambrian metasediments which have undergone both ‘Grenvillian’ (c. 1000 Ma—Brook et al., 1976) and Caledonian (490–440 Ma—Fettes, 1979) amphibolite facies metamorphism. The effects of tectonic reworking and renewed migmatization on rocks of an earlier
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The Moines (summaries in Johnstone, 1975; Johnson et al., 1979; Johnson, 1983) are a series of late Precambrian metasediments which have undergone both ‘Grenvillian’ (c. 1000 Ma—Brook et al., 1976) and Caledonian (490–440 Ma—Fettes, 1979) amphibolite facies metamorphism. The effects of tectonic reworking and renewed migmatization on rocks of an earlier
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Migmatite occurrences in New England
1985The high-grade metamorphic belts of the northern Appalachians in New England comprise one of the classic migmatite terrains of the world. Migmatites occur within the highest-grade metamorphic zones in roughly linearnorth-south belts running from Long Island Sound to near the Canadian border—a distance of about 500 km (Figure 6.1).
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Migmatites of the Sawatch Range, Colorado
The Journal of Geology, 1935The crystalline core of the Sawatch Range is composed of coarse schist and gneiss, largely of sedimentary origin. Two distinct periods of batholithic intrusions occurred in pre-Cambrian time. Wide zones of mixed supercrustal and granitic material border the outcrops of the batholiths and show gradational facies on one side into the sedimentary schists ...
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