Abstract
The composition of accessory REE minerals (allanite, chevkinite, fergusonite, and REE carbonates) in alkaline metasomatic rocks of the Main Sayan Fault (quartz-albite-microcline-riebeckite-aegirine, quartzalbite-microcline-magnetite, and clinopyroxene-albite) was studied using back-scattered scanning electron microscopy. Chevkinite occurs only in quartz-albite-microline metasomatic rock. The paragenesis of allanite and titanite is stable in clinopyroxene-albite metasomatic rocks. Allanite and fergusonite are typical of all zones of the metasomatic column. Chevkinite and allanite are often altered due to interaction with hydrothermal fluid and lose some amount of LREE. Secondary bastnaesite, synchysite, and ancylite are formed after allanite, while secondary monazite is developed after chevkinite. Presumably, the low-temperature alteration of allanite and chevkinite under effect of F−, CO 2−3 , and P 3−4 -bearing fluids had not any significant manifestation in the total REE content in metasomatic rocks.
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References
F. R. Apel’tsin, N. V. Skorobogatova, and L. N. Yakushev, Genetic Features of Granitoides in the Polar Urals and Conditions of Their Rare Metallogenic Specialization (Nedra, Moscow, 1976) [in Russian].
V. V. Arkhangel’skaya, V. I. Kazansky, K. V. Prokhorov, and V. N. Sobachenko, “Geological Structure, Zoning and Formation Conditions of the Katugin Ta-Nb-Zr Deposit (Chara-Udokan Region, Eastern Siberia),” Geol. Rudn. Mestorozhd. 35(2), 115–131 (1993).
T. Armbruster, P. Bonatti, M. Akasaka, et al., “Recommended Nomenclature of Epidote-Group Minerals (Short Information),” Zap. Ross. Mineral. O-va 135(6), 19–23 (2006).
Yu. A. Balashov, Geochemistry of Rare Earth Elements (Nauka, Moscow, 1976) [in Russian].
P. Bayliss and A. A. Levinson, “A System of Nomenclature for Rare-Earth Mineral Species: Revision and Extension,” Am. Mineral. 72, 422–423 (1988).
L. S. Borodin, “Rare-Earth Elements As Geochemical Indicators for Endogenetic Mineral Formation,” Izv. Akad. Nauk SSSR, Ser. Geol., No. 7, 3–20 (1965).
T. V. Donskaya, E. V. Sklyarov, D. P. Gladkochub, et al., “The Baikal Collision Metamorphic Belt,” Dokl. Akad. Nauk 374(1), 79–83 (2000) [Dokl. Earth Sci 374 (7), 1075–1079 (2000)].
G. R. T. Droop, “A General Equation for Estimating Fe3+ Concentrations in Ferromagnesian Silicates and Oxides from Microprobe Analyses Using Stoichiometric Criteria,” Mineral. Mag. 51, 431–435 (1987).
Geology and Metamorphism of the Eastern Sayan (Nauka, Novosibirsk, 1988) [in Russian].
J. R. Haas, E. L. Shock, and D. C. Sassani, “Rare Earth Elements in Hydrothermal Systems: Estimates of Standard Partial Modal Thermodynamic Properties of Aqueous Complexes of the Rare Earth Elements at High Pressures and Temperatures,” Geochim. Cosmochim. Acta 59(21), 4239–4350 (1995).
S. E. Haggerty and A. N. Mariano, “Strontian-Loparite and Strontio-Chevkinite: Two New Minerals in Rheomorphic Fenites from the Parana Basin Carbonatite, South America,” Contrib. Mineral. Petrol. 84(4), 365–381 (1983).
J. Ito, “A Study of Chevkinite and Perrierite,” Am. Mineral. 52, 1094–1104 (1967).
D. S. Korzhinky, “Essay on Metasomatic Processes,” in Main Problems in the Theory of Magmatogenic Ore Deposits (Akad. Nauk SSSR, Moscow, 1955), pp. 333–456 [in Russian].
D. A. Mineev, “Geochemical Differentiation of Rare Earth Elements,” Geokhimiya 1(12), 1082–1100 (1963).
Minerals. Reference Book (Nauka, Moscow, 1972), Vol. III, No. 1 [in Russian].
F. Poitrasson, “In situ Investigations of Allanite Hydrothermal Alteration: Examples from Calc-Alkaline and Anorogenic of Corsica (Southeast France),” Contrib. Mineral. Petrol. 142, 485–500 (2002).
V. B. Savel’eva, “Mineralogy and Geochemistry of Alkaline Metasomatites in Zone of the Main Sayan Fault (Middle Reaches of the Kitoi River, Eastern Sayan),” Zap. Ross. Mineral. O-va 135(2), 16–37 (2006).
S. R. Taylor and S. M. McLennan, The Continental Crust: Its Composition and Evolution (Blackwell, Oxford, 1985; Mir, Moscow, 1988).
A. I. Tugarinov, A. S. Pavlenko, and I. V. Aleksandrov, Geochemistry of Alkaline Metasomatism (Akad. Nauk SSSR, Moscow, 1963) [in Russian].
S. A. Wood, “The Aqueous Geochemistry of the Rare-Earth Elements and Yttrium. 2. Theoretical Predictions of Speciation in Hydrothermal Solutions to 350°C at Saturation Water Vapor apor Pressure,” Chem. Geol. 88, 99–125(1990).
G. P. Zaraisky, Zoning and Formation Conditions of Metasomatic Rocks (Nauka, Moscow, 1989) [in Russian].
V. A. Zharikov and B. I. Omel’yanenko, “Some Problems of Altered Host Rocks Related to Metallogenic Research,” in Localization of Ore Mineralization for Metallogenic Research in Ore Districts (Nedra, Moscow, 1965), pp. 119–194 [in Russian].
V. V. Zhdanov, Metasomatic Rocks, Experience in Studying and Mapping (VSEGEI, St. Petersburg, 1999) [in Russian].
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Original Russian Text © V.B. Savel’eva, N.S. Karmanov, 2008, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2008, Pt CXXXVII, No. 2, pp. 14–36.
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Savel’eva, V.B., Karmanov, N.S. Ree minerals of alkaline metasomatic rocks in the Main Sayan Fault. Geol. Ore Deposits 50, 681–696 (2008). https://doi.org/10.1134/S1075701508080035
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DOI: https://doi.org/10.1134/S1075701508080035