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1994
Metamorphic mafic rocks (e.g., mafic schist or greenschist and mafic gneiss, amphibolite) are derived from mafic igneous rocks, mainly basalts and andesites, and of lesser importance, gabbro and mafic diorite (Chap. 2). Metamorphic assemblages in mafic rocks are particularly useful in defining the intensity of metamorphism within the metamorphic facies
Martin Frey, Kurt Bucher
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Metamorphic mafic rocks (e.g., mafic schist or greenschist and mafic gneiss, amphibolite) are derived from mafic igneous rocks, mainly basalts and andesites, and of lesser importance, gabbro and mafic diorite (Chap. 2). Metamorphic assemblages in mafic rocks are particularly useful in defining the intensity of metamorphism within the metamorphic facies
Martin Frey, Kurt Bucher
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2014
Metamorphic rocks are product of transformation or solid-state recrystallization of existing (protolith) igneous, sedimentary, and metamorphic rocks, due to change in physical and chemical conditions, principally temperature, pressure and introduction of chemically active fluids and gases. Metamorphism alters the mineral composition including formation
S.K. Haldar, Josip Tišljar
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Metamorphic rocks are product of transformation or solid-state recrystallization of existing (protolith) igneous, sedimentary, and metamorphic rocks, due to change in physical and chemical conditions, principally temperature, pressure and introduction of chemically active fluids and gases. Metamorphism alters the mineral composition including formation
S.K. Haldar, Josip Tišljar
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Lithos, 2001
Basic principles for the study of fluid inclusions in metamorphic rocks are reviewed and illustrated. A major problem relates to the number of inclusions, possibly formed on a wide range of P-T conditions, having also suffered, in most cases, extensive changes after initial trapping.
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Basic principles for the study of fluid inclusions in metamorphic rocks are reviewed and illustrated. A major problem relates to the number of inclusions, possibly formed on a wide range of P-T conditions, having also suffered, in most cases, extensive changes after initial trapping.
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Metamorphism of Ultramafic Rocks
1994Ultramafic rocks are magnesium silicate rocks that normally contain no felsic minerals or very little (
Kurt Bucher, Martin Frey
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Metamorphic Reactions in Carbonate Rocks [PDF]
, 1965 The metamorphism of quartz-bearing carbonate rocks provides interesting examples of metamorphic reactions. The occurence of siliceous dolomites and siliceous dolomitic limestones is very widespread, whereas that of magnesite-bearing sediments is much rarer.
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1974
Basalts and pyroxene-andesites comprise by far the largest amount of mafic rocks and greatly predominate over their plutonic equivalents. Basalts and andesites are widespread in most geosynclines in the forms of lava flows, pillow lavas, tuff layers, sills, and dykes.
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Basalts and pyroxene-andesites comprise by far the largest amount of mafic rocks and greatly predominate over their plutonic equivalents. Basalts and andesites are widespread in most geosynclines in the forms of lava flows, pillow lavas, tuff layers, sills, and dykes.
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2021
In this chapter, all metamorphic rocks of Iran have been studied and evaluated from the perspective of metamorphic facies, protoliths and their relationship with magmatic and orogenic phases. The distribution of metamorphic rocks is described along with the geological map and the grade of metamorphism.
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In this chapter, all metamorphic rocks of Iran have been studied and evaluated from the perspective of metamorphic facies, protoliths and their relationship with magmatic and orogenic phases. The distribution of metamorphic rocks is described along with the geological map and the grade of metamorphism.
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Geochimica et Cosmochimica Acta, 1968
Abstract The concentration of Hg in the regionally metamorphosed politic schists, gabbroic rocks and in quartz, magnetite and hematite from metamorphosed iron formation rocks reported here ranged from tenths of ppb to tenths of ppm. The concentrations did not vary in a systematic way. However, in stepwise heating experiments the fraction of the total
G.W. Reed +3 more
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Abstract The concentration of Hg in the regionally metamorphosed politic schists, gabbroic rocks and in quartz, magnetite and hematite from metamorphosed iron formation rocks reported here ranged from tenths of ppb to tenths of ppm. The concentrations did not vary in a systematic way. However, in stepwise heating experiments the fraction of the total
G.W. Reed +3 more
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Metamorphism of Pelitic Rocks (Metapelites) [PDF]
, 1994 Metapelites are probably the most distinguished family of metamorphic rocks. Typical metapelites include well-known metamorphic rocks such as, for example: chlorite-kyanite-schists, staurolite-garnet micaschists, chlori-toid-garnet micaschists, kyanite-staurolite schists, biotite-garnet-cordierite gneisses, sillimanite-biotite gneisses and ...
Martin Frey, Kurt Bucher
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Metamorphism of Granitoid Rocks
2002Granitoid rocks comprise granite, alkali-feldspar granite, granodiorite and tonalite. They constitute the largest portion of the continental crust. Granitoid gneisses, commonly migmatites, are in fact the dominant rock type of the continents. Because the main constituents — alkali-feldspar, plagioclase, quartz, biotite, muscovite, hornblende — are ...
Kurt Bucher, Martin Frey
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