Abstract
The investigation of the Kolvitsa gabbro-anorthosite massif showed that its melanocratic layers conformable with metamorphic banding are mafic differentiates transformed into eclogite-like rocks during prograde metamorphism. During the peak and retrograde stage of the Svecofennian metamorphism in the White Sea region at t = 910–750°C and P = 14-7 kbar, the infiltration of Fe-, CO2-, Si-, and Na-bearing fluids with \(X_{H_2 O} < 0.4\) resulted in metasomatic alterations of the melanocratic gabbro-anorthosite interlayers, dissolution of a number of elements, and their reprecipitation with the formation of cross-cutting zoned metasomatic veins with abundant magnetite and ilmenite. The high content of hematite in the ilmenite suggests that the veins were formed at an increase in oxygen fugacity from \(\log f_{O_2 } = - 14.5\) to \(\log f_{O_2 } = - 11\), which caused the Fe2+ → Fe3+ transition and iron precipitation. The increase in at the conditions corresponding to the metamorphic peak was probably related to the neutralization of solutions during their infiltration through the gabbro-anorthosites. The reprecipitation of components and the formation of cross-cutting veins occurred owing to interaction between the melanocratic layers in the gabbro-anorthosites and a fluid phase and, contrary to previous models, did not involve the fluid transport of components from the zones of charnockite formation and granitization located far away from the sites of reprecipitation. This is demonstrated by the similarity of mineral compositions and major component contents in the melanocratic gabbro-anorthosite layers and cross-cutting metasomatic veins and regular distribution of trace elements.
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References
B. A. Yudin, “Gabbro-Labradorite Formation of the Kola Peninsula and Its Metallogeny,” (Leningrad, 1980) [in Russian].
F. P. Mitrofanov, V. V. Balaganskii, Yu. A. Balashov, et al., “U-Pb Age of the Gabbro-Anorthosites of the Kola Peninsula,” Dokl. Akad. Nauk 331(1), 95–98 (1993).
V. A. Glebovitskii, Sh. K. Baltybaev, O. A. Levchenkov, and E. V. Kuz’mina, “Thermodynamic Regime of Svecofennian (1.9 Ga) Metamorphism of the Umba Nappe of the Lapland Collisional Orogen,” Petrologiya, No. 4, 355–377 (2009) [Petrology 17, 331–351 (2009)].
M. N. Bogdanova, M. M. Efimov, R. O. Sorokhtin, et al., “Development of the Polymetamorphism in the Granulite Belt of the Kola Peninsula (Kolvitsa Zone), and U-Pb Dating the Diaphthoresis of the Anorthosite Association,” Dokl. Akad. Nauk 331(1), 95–98 (1993).
T. Frish, G. D. Dzhekson, V. A. Glebovitskii, et al., “U-Pb Geochronology of Zircons from the Kolvitsa Gabbroanorthosite Complex, Southern Part of the Kola Peninsula, Russia,” Petrologiya, No. 3, 248–254 (1995).
L. A. Priyatkina and E. V. Sharkov, Geology of the Lapland Deep Fault in the Baltic Shield (Nauka, Leningrad, 1979) [in Russian].
E. V. Sharkov, “Anorthosite Associations of the Kola Peninsula,” in Anorthosites of the Earth and Moon (Nauka, Moscow, 1984), pp. 5–61 [in Russian].
L. I. Khodorevskaya and S. P. Korikovskii, “Metasomatic Garnet-Clinopyroxene-Orthopyroxene-Hornblende Veins in Metaanorthosites of the Kolvitsa Massif, Kola Peninsula: Mineral Composition and Relation with Syngranulite Granitization,” Dokl. Earth Sci. 415A, 915–918 (2007).
S. P. Korikovsky and L. Ya. Aranovich, “Charnockitization and Enderbitization of Mafic Granulites in the Porya Bay Area, Lapland Granulite Belt, Southern Kola Peninsula: I. Petrology and Geothermobarometry,” Petrology 18, 320–349 (2010).
L. I. Khodorevskaya, “Experimental Study of Mafic Rocks during Interaction with Silica-Alkaline Fluid (Granitization),” in Experimental Studies of Endogenous Processes (INKhF RAN, Chernogolovka, 2008), pp. 30–39 [in Russian].
E. J. Essene and W. S. Fyfe, “Omphacite in Californian Metamorphic Rocks,” Contrib. Mineral. Petrol. 15, 1–23 (1967).
L. L. Perchuk, “Consistency in Some Fe-Mg Geothermometers Based on Nernst’s Law: Revision,” Geochem. Int. 12, 1–11 (1989).
L. I. Khodorevskaya, “Ca-Amphiboles in Metamorphic Basic Rocks as Fluid Regime Indicators,” Exp. Geosci. 14, 131–134 (2007).
R. G. Berman, “Thermobarometry Using Multiequilibrium Calculations: A New Technique with Petrologic Applications,” Can. Mineral. 29, 833–855 (1991).
R. G. Berman, L. Y. Aranovich, and D. R. M. Pattison, “Reassessment of the Garnet-Clinopyroxene Fe-Mg Exchange Thermometer: II. Thermodynamic Analysis,” Contrib. Mineral. Petrol. 119, 30–42 (1995).
R. G. Berman and L. Y. Aranovich, “Optimized Standard State and Solution Properties of Minerals: I. Model Calibration for Olivine, Orthopyroxene, Cordierite, Garnet, and Ilmenite in the System FeO-MgO-CaO-Al2O3-TiO2-SiO2,” Contrib. Mineral. Petrol. 126, 1–22 (1996).
L. Ya. Aranovich and V. M. Kozlovskii, “The Role of Silica Mobility in the Formation of ‘Incipient’ Eclogites,” Geochem. Int. 47, 199–204 (2009).
V. I. Levitskii, Petrology and Geochemistry of Metasomatism during the Formation of the Continental Crust (Geo, Novosibirsk, 2005) [in Russian].
A. P. Vinogradov, “Average Contents of Chemical Elements in the Major Types of Igneous Rocks,” Geokhimiya, No. 7, 555–571 (1962).
E. S. Bibikova, S. Claesson, V. A. Glebovitskii, et al., “Isotope Dating of the Svecofennian Metamorphism of the Belomorian Belt, Baltic Shield,” Geochem. Int. 39, 1023–1026 (2001).
M. D. Samsonov, “Fissuring of the Gabbroanorthosites of the Kolvitsa Massif, Kola Peninsula, and Evolution of Stress Fields,” in Modern Problems of Geology (Nauchnyi Mir, Moscow, 2002), pp. 133–136 [in Russian].
L. Ya. Aranovich and R. C. Newton, “H2O Activity in Concentrated NaCl Solutions at High Temperatures and Pressures Measured by the Brucite-Periclase Equilibrium,” Contrib. Mineral. Petrol. 125, 200–212 (1996).
K. I. Shmulovich, G. Graham, and B. W. D. Yardley, “Quartz, Albite and Diopside Solubilities in H2O-NaCl and H2O-CO2 Fluids at 0.5–0.9 GPa,” Contrib. Mineral. Petrol. 141, 95–108 (2001).
D. M. Pecherskii and Yu. S. Genshaft, “Petromagnetism of the Continental Lithosphere and Nature of Regional Magnetic Anomalies,” Ross. Zh. Nauk Zemle 3(2), 4–36 (2001).
A. F. Buddington and D. H. Lindsley, “Iron-Titanium Oxide Minerals and Synthetic Equivalents,” J. Petrol. 5 Part 2, 310–357 (1964).
L. I. Khodorevskaya, “Mineral Composition and PT-Conditions of the Formation of Ca-Mg-Fe Metasomatites in Basic Granulites (Por’ya Guba, Belomor’e): Evidence for Syngenetic Granitization and Basification,” Dokl. Earth Sci. 432, 693–696 (2010)].
E. V. Pavlovskii, “Problem of Anorthosites and Rapakivi Granites: Tectonic Aspect,” Izv. Vyssch. Uchebn. Zav., Ser. Geol., No. 5, 3–18 (1989).
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Original Russian Text © L.I. Khodorevskaya, 2012, published in Geokhimiya, 2012, Vol. 50, No. 3, pp. 298–315
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Khodorevskaya, L.I. Granulite facies metamorphism and metasomatism in the gabbro-anorthosites of the Kolvitsa massif, Kola Peninsula. Geochem. Int. 50, 272–288 (2012). https://doi.org/10.1134/S0016702912010041
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DOI: https://doi.org/10.1134/S0016702912010041