Abstract
Granulites may be produced in either fluid-present or fluid-absent metamorphism. Fluid-present granulites can be formed by relatively low-T dehydration reactions, in the presence of a fluid dominated by a species other than H2O (e.g., CO2). Small quantities of H2O-rich fluid may be present at the onset of granulite facies conditions (≥ 650°C). This will promote limited degrees of partial fusion and the formation of granulitic migmatites, but will not produce mobile granitoid magma. Much of the lowermost crust is composed of non-restitic metagabbros and cumulates. However, the middle and lower crust also contain a substantial component of granulitic restite. This is derived through fluid-absent partial melting of common crustal rock-types that had been through earlier hydration cycles. Only fluid-absent granulites, produced at T ≥ 850°C, can have intimate, cogenetic connexions with voluminous granitoids. Non-restitic, mafic granulites represent basaltic magma that provided the heat source for metamorphism and melting of the overlying rocks. Restitic granulites are the refractory, residual complements of the granitoid magmas emplaced at higher levels. Silicic magmatism is most commonly a manifestation of crustal growth through under- and intra-plating of mantle-derived magma.
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References
Atherton, M. P. and Gobble, C. D. (eds), 1983. Migmatites, Melting and Metamorphism, Shiva, Nantwich, U.K., 326 pp.
Buddington, A. F., 1959. ‘Granite emplacement with special reference to North America’, Bull.Geol.Soc.Am. 70:671–748.
Clemens, J. D., 1974. The Geology of the Round Hill Area, Broken Hill, N.S.W. Some Structural and Petrographic Aspects, unpubl. M.Sc. (prelim.) thesis, Monash University Australia.
Clemens, J. D., 1984. ‘Water contents of silicic to intermediate magmas’, Lithos 17: 273–287.
Clemens, J. D. and Vielzeuf, D., 1987. ‘Constraints on melting and magma production in the crust’, Earth Planet. Sci. Lett. 86: 287–306.
Clemens, J. D. and Vielzeuf, D., 1988. ‘Phlogopite phase relations in the system KMASH: new data and a reappraisal of phase relations’ (abstr.), EOS 69: in press.
Clemens, J. D. and Wall, V. J., 1981. ‘Crystallization and origin of some peraluminous (S-type) granitic magmas’, Can. Mineral. 19: 111–132.
Eggler, D. H., 1973. ‘Principles of melting of hydrous phases in silicate melt’, Carnegie Inst.Washington Yearbook 72: 491–495.
Eggler, D. H. and Holloway, J. R., 1977. ‘Partial melting of peridotite in the presence of H2O and CO2: principles and review’, Oregon Dept. Geol. Min. Ind. Bull. 96: 15–36.
Ellis, D. J., 1987. ‘Origin of granulites in normal and thickened crusts’, Geology 15: 167–170.
England, P. C. and Thompson, A. B., 1986. ‘Some thermal and tectonic models for crustal melting in continental collision zones’, Geol. Soc. Spec. Pub. 19: 83–94.
Eskola, P., 1932. ‘On the origin of granitic magmas’, Mineralog. Petrogr. Mitt. 42: 455–481.
Etheridge, M. A., Wall, V. J. and Vernon, R. H., 1983. ‘The role of the fluid phase during regional metamorphism’, J. Metamorphic Geol. 1: 205–226.
Eugster, H. P., 1977. ‘Compositions and thermodynamics of metamorphic solutions’, in Fraser, D. G. (ed.), Thermodynamics in Geology, D. Reidel, Dordrecht, Netherlands, pp. 183–202.
Flood, R. H. and Vernon, R. H., 1978. ‘The Cooma granodiorite, Australia: an example of in situ crustal anatexis?’, Geology 6: 81–84.
Furlong, K. P. and Fountain, D. M., 1986. ‘Continental crustal underplating: thermal considerations and seismic-petrologic consequences’, J. Geophys. Res. 91: 8285–8294.
Fyfe, W. S., 1973. ‘The granulite facies, partial melting and the Archean crust’, Phil. Trans. R. Soc. Lond. A273: 457–461.
Fyfe, W. S., Price, N. J. and Thompson, A.B., 1978. Fluids in the Earth’s Crust, Elsevier, Amsterdam, Netherlands, 383 pp.
Grant, J. A., 1985. ‘Phase equilibria in partial melting of pelitic rocks’, in Ashworth, J. R. (ed.), Migmatites, Blackie & Son, Glasgow, U.K., pp. 86–144.
Grant, J. A., 1986. ‘Quartz — phlogopite — liquid equilibria and origins of charnockites’, Am. Mineral. 71: 1071–1075.
Grew, E. S., 1984. ‘A review of antarctic granulite-facies rocks’, Tectonophysics 105: 177–191.
Herzberg, C. T., 1983. ‘Density constraints on the formation of the continental Moho and crust’, Contrib. Mineral. Petrol. 84: 1–5.
Holloway, J. R., 1981. ‘Volatile interactions in magmas’, in Newton, R. C., Navrotsky, A. and Wood, B. J. (eds), Thermodynamics of Minerals and Melts, Springer-Verlag, New York, U.S.A., pp. 273–293.
Huppert, H. E. and Sparks, R. S. J., 1988. ‘The generation of granitic magmas by intrusion of basalt into continental crust’, J. Petrol. 29: 599–624.
Janardhan, A. S., Newton, R. C. and Hansen, E. C., 1982. ‘The transformation of amphibolite facies gneiss to charnockite in southern Kamataka and northern Tamil Nadu, India’, Contrib. Mineral. Petrol. 79: 130–149.
Johannes, W., 1988. ‘What controls partial melting in migmatites?’, J. Metamorphic Geol. 6: 451–465.
Kenah, C. and Hollister, L. S., 1983. ‘Anatexis in the Central Gneiss Complex, British Columbia’, in Atherton, M. P. and Gribble, C. D. (eds), Migmatites, Melting and Metamorphism, Shiva, Nantwich, U.K., pp. 142–162.
Lamb, W. and Valley, J. W., 1984. ‘Metamorphism of reduced granulites in low-CO2 vapour-free environment’, Nature 312: 56–58.
Le Breton, N. and Thompson, A. B., 1988. ‘Fluid-absent (dehydration) melting of biotite in metapelites in the early stages of crustal anatexis’, Contrib. Mineral. Petrol. 99: 226–237.
Munksgaard, N. C., 1988. ‘Source of the Cooma Granodiorite, New South Wales — a possible role of fluid — rock interactions’, Austr. J. Earth Sci. 35: 363–377.
Newton, R. C., Smith, J. V. and Windley, B.F., 1980. ‘Carbonic metamorphism, granulites, and crustal growth’, Nature 288: 45–50.
Olsen, S. K., 1987. ‘The composition and role of the fluid in migmatites: a fluid inclusion study of the Front Range rocks’, Contrib. Mineral. Petrol. 96: 104–120.
Pattison, D. R. M. and Harte, B., 1988. ‘Evolution of structurally contrasting anatectic migmatites in the 3-kbar Ballachulish aureole, Scotland’, J. Metamorphic. Geol. 6: 475–494.
Peterson, J. W. and Newton, R. C., 1987. ‘Reversed biotite + quartz melting reactions’ (abstr.), EOS 68: 451.
Phillips, G. N., 1980. ‘Water activity changes across an amphibolite-granulite facies transition, Broken Hill, Australia’, Contrib. Mineral. Petrol. 75: 377–386.
Ruiz, J., Patchett, P. J. and Arculus, R. J., 1988. ‘Nd — Sr isotopic composition of lower crustal xenoliths — evidence for the origin of mid-tertiary felsic volcanics in Mexico’, Contrib. Mineral. Petrol. 99: 36–43.
Rumble, D., 1988. ‘Fluid flow during regional metamorphism’ (abstr.), EOS 69: 464.
Rushmer, T., 1987. ‘Fluid-absent melting of amphibolite — experimental results at 8 kbar’ (abstr.), Terra Cognita 7: 286.
Rutter, E. H. and Brodie, K. H., 1985. ‘The permeation of water into hydrating shear zones’, in Thompson, A. B. and Rubie, D. C. (eds), Metamorphic Reactions. Kinetics, Textures and Deformation, Springer-Verlag, New York, U.S.A., pp. 242–250.
Rutter, M. J. and Wyllie, P. J., 1988. ‘Melting of vapour-absent tonalite at 10 kbar to simulate dehydration-melting in the deep crust’, Nature 331: 159–160.
Sandiford, M. and Powell, R., 1986a. ‘Pyroxene exsolution in granulites from Fyfe Hills, Enderby Land, Antarctica: evidence for 1000°C metamorphic temperatures in Archean continental crust’, Am. Mineral. 71: 946–954.
Sandiford, M. and Powell, R., 1986b. ‘Deep crustal metamorphism during continental extension: modern and ancient examples’, Earth Planet. Sci. Lett. 79: 151–158.
Sorensen, S. S., 1988. ‘Petralogy of amphibolite-facies mafic and ultramafic rocks from the Catalina Schist, southern California: metasomatism and migmatization in a subduction zone setting’, J. Metamorphic Geol. 6: 405–435.
Stähle, H. J., Raith, M., Hoernes, S. and Delfs, A., 1987. ‘Element mobility during incipient granulite formation at Kabbaldurga, southern India’, J. Petrol. 28: 803–834.
Strong, D. F. and Dupuy, C., 1982. ‘Rare earth elements in the bimodal Mount Peyton batholith: evidence of crustal anatexis by mantle-derived magma’, Can. J. Earth Sci. 19: 308–315.
Thompson, A. B., 1982. ‘Dehydration melting of pelitic rocks and the generation of H2O-undersaturated granitic liquids’, Am. J. Sci. 282: 1567–1595.
Thompson, A. B. and Ridley, J. R., 1987. ‘Pressure — temperatute — time (P-T-t) histories of orogenic belts’, Phil. Trans. R. Soc. Lond. A321: 27–45.
Thompson, A. B. and Tracy, R. J., 1979. ‘Model systems for anatexis of pelitic rocks. II. Facies series melting and reactions in the system CaO - KAlO2 - NaAlO2 - Al2O3 - SiO2 - H2O’, Contrib. Mineral. Petrol. 70:429–438.
Tracy, R. J. and Robinson, P., 1983. ‘Acadian migmatite types in pelitic rocks of Central Massachusetts’, in Atherton, M. P. and Gribble, C. D. (eds), Migmatites, Melting and Metamorphism, Shiva, Nantwich, U.K., pp. 163–173.
Vielzeuf, D. and Holloway, J. R., 1988. ‘Experimental determination of the fluid-absent melting relations in the pelitic system. Consequences for crustal differentiation’, Contrib. Mineral. Petrol. 98: 257–276.
Watson, E. B. and Brenan, J. M., 1987. ‘Fluids in the lithosphere, 1. Experimentally determined wetting characteristics of CO2 - H2O fluids and their implications for fluid transport, host-rock physical properties, and fluid inclusion formation’, Earth Planet. Sci. Lett. 85: 497–515.
Wells, P. R. A., 1981. ‘Accretion of continental crust: thermal and geochemical consequences’, Phil. Trans. R. Soc. Lond. A301: 347–357.
Wendlandt, R. F., 1981. ‘Influence of CO2 on melting of model granulite facies assemblages: a model for the genesis of charnockites’, Am. Mineral. 66: 1164–1174.
Wickham, S. M. and Oxburgh, E. R., 1985. ‘Continental rifts as a setting for regional metamorphism’, Nature 318: 330–333.
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Clemens, J.D. (1990). The Granulite — Granite Connexion. In: Vielzeuf, D., Vidal, P. (eds) Granulites and Crustal Evolution. NATO ASI Series, vol 311. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2055-2_3
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DOI: https://doi.org/10.1007/978-94-009-2055-2_3
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