Abstract
The behavior of tantalum in carbonatites and related rocks of alkaline complexes was analyzed. In particular, we considered factors favorable for its accumulation in carbonatites, both in absolute amount and relative to its companion element niobium.
The contents of both elements show moderate variations in earlier alkaline silicate rocks and more significant variations in carbonatites; this difference is especially pronounced for tantalum.
Their simultaneous accumulation in carbonatites is controlled mainly by the affiliation to certain temperature facies, when tantalate-niobate phases with high Ta2O5 contents (up to 26 wt %) are formed. The accumulation of these elements with the formation of almost purely niobian pyrochlores and Ta-U pyrochlores (hatchettolites) occurs efficiently only during the formation of metasomatic zoning with the separation of purely Nb and Nb-Ta mineralization between the zones of the metasomatic column. This process is characteristic mainly of relatively deep-seated massifs, where the metasomatic processes of carbonatite formation are dominant, at least for the given temperature facies.
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References
K. N. Wedepohl, “Niobium.41-E Abundance in Common Igneous Rock Types. Crustal Abundance,” in Handbook of Geochemistry, Ed. by K. H. Wedepohl (Springer, Berlin-Heidelberg, 1978), Vol. II/3, pp. 41-E-1–41-E-15.
E. M. Es’kova, “Niobium,” in Geochemistry, Mineralogy, and Genetic Types of Trace-Element Deposits. Trace Element Geochemistry, Ed. by K. A. Vlasov (Nauka, Moscow, 1964), Vol. 1, pp. 343–382 [in Russian].
V. I. Gerasimovskii and E. B. Znamenskii, “Distribution of Niobium and Tantalum in Igneous Rocks,” in Geochemistry of Trace Elements and the Problem of Petrogenesis (GEOKhI AN SSSR, Moscow, 1959), pp. 36–41 [in Russian].
M. V. Kuz’menko, Geochemistry of Tantalum and Genesis of Endogenous Tantalum Deposits (Nauka, Moscow, 1978) [in Russian].
L. K. Pozharitskaya and V. S. Samoilov, Petrology, Mineralogy, and Geochemistry of the Carbonatites of Eastern Siberia (Nauka, Moscow, 1972) [in Russian].
V. S. Samoilov, Geochemistry of Carbonatites (Nauka, Moscow, 1984) [in Russian].
Yu. A. Bagdasarov, “Main Petrochemical and Geochemical Features of Linear-Type Carbonatites and Conditions of Their Formation,” Geokhimiya, No. 8, 1108–1119 (1990).
Yu. L. Kapustin, “Distribution of Niobium and Tantalum in Fergusonite Carbonatites and Their Weathering Residues,” Geokhimiya, No. 4, 558–569 (1990).
G. F. Anastasenko and A. G. Bulakh, “On the Mineralogy and Geochemistry of Tantalum in the Camaforites and Carbonatites of the Turiy Peninsula, Murmansk Oblast,” in Minerals and Mineral Parageneses (Leningrad, 1978), pp. 39–56 [in Russian].
A. G. Bulakh and V. V. Ivanikov, Problems of the Mineralogy and Petrology of Carbonatites (Leningr. Gos. Univ., Leningrad, 1984) [in Russian].
L. A. Berezina, “Geochemistry of Radioactive Elements in Rare-Metal Carbonatite Complexes,” in Geology of Trace Element Deposits (Nedra, Moscow, 1972), Issue 35, pp. 154–174 [in Russian].
L. A. Berezina and Yu. A. Bagdasarov, “Stages, Zoning, and Evolution of Radioactive Elements in Carbonatites,” Geokhimiya, No. 7, 815–824 (1968).
S. R. Taylor and S. M. McLennan, The Continental Crust: Its Composition and Evolution. An Examination of the Geochemical Record Preserved in Sedimentary Rocks (Blackwell, Oxford, 1985; Mir, Moscow, 1988).
K. H. Wedepohl, “Composition of the Continental Crust,” Geochim. Cosmochim. Acta 59, 1217–1232 (1995).
V. I. Gerasimovskii and A. I. Polyakov, “Geochemistry of the Volcanic Rocks of East Africa,” in East African Rift System (Nauka, Moscow, 1974), Vol. 3, pp. 5–194 [in Russian].
A. A. Kukharenko, M. P. Orlova, A. G. Bulakh, et al., Caledonian Complex of Alkaline Ultrabasic Rocks and Carbonatites of the Kola Peninsula and Northern Karelia (Nedra, Moscow, 1965) [in Russian].
M. V. Kuz’menko, “Problems of the Systematics and Typochemism of Pyrochlore-Group Tantaloniobates,” in Typochemism of the Minerals of Granite Pegmatites (IMGRE, Moscow, 1984), pp. 5–32 [in Russian].
S. A. Gorzhevskaya, G. A. Sidorenko, and A. I. Ginzburg, Titano-tantaloniobates (Nedra, Moscow, 1974) [in Russian].
Minerals. A Handbook (Nauka, Moscow, 1967), Vol. 2, Issue 3 [in Russian].
L. N. Zhuravleva, L. A. Berezina, and E. N. Gulin, “Geochemical Features of Trace and Radioactive Elements in the Apatite-Magnetite Ores of Ultrabasic-Alkaline Complexes,” Geokhimiya, No. 10, 1512–1532 (1976).
Yu. A. Bagdasarov, “Metallogeny of the Carbonatite Complexes of Russia,” in Metallogeny of Magmatic Complexes in Within-Plate Geodynamic Settings (GEOS, Moscow, 2001), pp. 128–506 [in Russian].
L. K. Pozharitskaya, Yu. A. Bagdasarov, L. A. Berezina, and L. A. Razvozzhaeva, “Some Features of the Evolution and Distribution of Rare Metal Mineralization in the Carbonatite Complexes of Eastern Siberia,” in Geochemical Problems of Igneous Rocks and Deposits of Eastern Siberia (Nauka, Moscow, 1965), pp. 192–208 [in Russian].
Yu. A. Bagdasarov, “On the Distribution of Rare-Metal Mineralization in Carbonatites,” Zap. Vseross. Mineral. O-va 98, 395–406 (1969).
Yu. A. Bagdasarov, “On the Types of Tantalum-Niobium Ores and Some Features of Their Distribution in Carbonatites,” Geol. Rudn. Mestorozhd., No. 5, 15–24 (1974).
L. K. Pozharitskaya, B. T. Veis, T. D. Kvitko, et al., “Bol’shetagninskoe Niobium Deposit,” in Mineral Resources (VIMS, Moscow, 2006), No. 18, pp. 119–134 [in Russian].
A. V. Lapin and A. V. Tolstov, Weathering Residues after Carbonatites (Nauka, Moscow, 1995) [in Russian].
Yu. A. Bagdasarov, “Rare-Metal Ore Potential of the Carbonatites of Magmatic and Hydrothermal-Metasomatic Genesis,” Geol. Rudn. Mestorozhd., No. 1, 18–28 (1994).
Yu. A. Bagdasarov, “Regional Variations in Rare and Trace Element Contents in the Carbonatites of Alkaline Complexes,” Geol. Razved., No. 6, 4–11 (1995).
A. I. Ginzburg and E. M. Epshtein, “Carbonatite Deposits,” in Genesis of Endogenous Ore Deposits (Nedra, Moscow, 1968), pp. 152–219 [in Russian].
Carbonatites, Ed. by O. F. Tuttle and J. Gittins (Interscience, New York, 1966; Mir, Moscow, 1969).
A. L. Wooley, Alkaline Rocks and Carbonatites of the World. Part. I. North and South America (Natural History Museum, London, 1987).
R. K. Duncan and G. C. Wallett, “Mount Weld Carbonatite,” in Geology of the Mineral Deposits of Australia and Papua New Guinea (Austral. Inst. Min. Metall., Melbourne, 1990), pp. 591–597.
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Original Russian Text © Yu.A. Bagdasarov, 2009, published in Geokhimiya, 2009, No. 2, pp. 171–183.
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Bagdasarov, Y.A. On the geochemistry of tantalum in the carbonatite process. Geochem. Int. 47, 163–173 (2009). https://doi.org/10.1134/S0016702909020049
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DOI: https://doi.org/10.1134/S0016702909020049