Abstract
The Parnok deposit is made up of stratiform lodes of iron (magnetite) and manganese (oxide-carbonate, carbonate, and carbonate-silicate) ores localized among terrigenous-carbonate sediments (black shales) on the western slope of the Polar Urals. The lithological study showed that ore-bearing sediments were accumulated in a calm hydrodynamic setting within a relatively closed seafloor area (trap depressions). Periodic development of anaerobic conditions in the near-bottom seawater was favorable for the accumulation of dispersed organic matter in the terrigenous-carbonate sediments. Carbon required to form calcium carbonates in the ore-bearing sediments was derived from carbon dioxide dissolved in seawater. In the organic-rich sediments, carbonates were formed with the participation of carbon dioxide released by the destruction of organic matter. However, δ13C values (from 0.5 to −4.4‰ PDB) suggest a relatively low fraction of the isotopically light biogenic carbon in the host calcite. The most probable sources of Fe and Mn were hydrothermal seepages at the seafloor. The Eh-pH conditions during stagnation were favorable for the precipitation of Fe and accumulation of Mn in a dissolved state. Transition from the stagnation regime to the concentration of oxygen in near-bottom waters was accompanied by oxidation of the dissolved Mn and its precipitation. Thus, fluctuations in Eh-pH parameters of water led to the differentiation of Fe and Mn. Initially, these elements were likely precipitated as oxides and hydroxides. During the subsequent lithification, Fe and Mn were reduced to form magnetite and rhodochrosite. The texture and structure of rhodochrosite aggregates indicate that manganese carbonates already began to form at the diagenetic stage and were recrystallized during the subsequent lithogenetic stages. Isotope data (δ13C from −8.9 to −17.1‰ PDB) definitely indicate that the oxidized organic matter of sediment served as the main source of carbon dioxide required to form manganese carbonates. Carbonates from host rocks and manganese ores have principally different carbon isotopic compositions. Unlike carbonates of host rocks, manganese carbonates were formed with an active participation of biogeochemical processes. Further processes of metagenesis (T ≈ 250–300°C, P ≈ 2 kbar) resulted in the transformation of textures, structures, and mineral composition of all rocks of the deposit. In particular, increase in temperature and pressure provided the formation of numerous silicates in manganese ores.
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References
Astakhov, A.S., Astakhova, N.V., Satarova, V.V., et al., Osadkonakoplenie i rudogenez vo vpadine Deryugina (Okhotskoe more) (Sedimentation and Ore Genesis in the Deryugin Basin, Sea of Okhotsk), Vladivostok: Dal’nauka, 2008.
Berner, R.A., Early diagenesis-A theoretical approach, Princeton: Princeton Univ. Press, 1980.
Bogdanov, Yu.A., Lisitzin, A.P., Binns, R.A., et al., Lowtemperature hydrothermal deposits of Franklin seamount, Woodlark basin, Papua New Guinea, Mar. Geol., 1997, vol. 142, nos. 1/4, p. 99–117.
Bogdanov, Yu.A., Vikent’ev, I.V., Lein, A.Yu., et al., Lowtemperature hydrothermal formations in the MAR rift zone, Geol. Ore Deposits, 2008, no. 2, pp. 132–150.
Brusnitsyn, A.I. and Kuleshov, V.N., Geochemistry of orebearing sediments in the Parnok ferromanganese deposit (Polar Urals), in Metallogeniya drevnikh i sovremennykh okeanov-2011 (Metallogeny of Ancient and Recent Oceans-2011), Miass: Imin UrO RAN, 2011, pp. 97–104.
Brusnitsyn, A.I. and Zhukov, I.G., Manganiferous rocks of the Magnitogorsk paleovolcanic belt (Southern Urals): Structure of deposits, composition, and genesis, Litosfera, 2010, no. 2, pp. 77–99.
Brusnitsyn, A.I., Kol’tsov, A.B., and Kalinina, O.G., Mineral assemblages and thermobarometry of metamorphosed manganese ores in the Parnok deposit (Polar Urals), Ural. Letn. Mineral. Shkola-99, Yekaterinburg, 1999, pp. 260–264.
Butuzova, G.Yu., Gidrotermal’no-osadochnoe rudoobrazovanie v riftovoi zone Krasnogo morya (Hydrothermal-Sedimentary Ore Formation in the Rift Zone of the Red Sea), Moscow: GEOS, 1998.
Coleman, M.L., Geochemistry of diagenetic non-silicate minerals: Kinetic considerations, London: Phil. Trans. R. Soc. London, 1985, A315, pp. 39–56.
Crerar, D.A., Namson, J., Chyi, M.S., et al., Manganiferous cherts of the Franciscan assemblage: I. General geology, ancient and modern analogues, and implications for hydrothermal convection at oceanic spreading centers, Econ. Geol., 1982, vol. 77, p. 519–540.
Emel’yanov, E.M., Ferromanganese ore process in the Baltic Sea, Lithol. Miner. Resour., 2011, no. 3, pp. 221–242.
Fan Delian, Liu Tiebing, Ye Jie, The process of formation of the manganese carbonate deposits hosted in black shale series, Econ. Geol., 1992, vol. 87, pp. 1419–1429.
Force, E.R. and Cannon, W.F., Depositional model for shallow-marine manganese deposits around black shale basins, Econ. Geol., 1988, vol. 83, pp. 93–117.
Frakes, L. and Bolton, B., Origin of manganese giants: Sea level change and anoxic-oxic history, Geology, 1984, vol. 12, pp. 83–86.
Froelich, P.N., Klinkhammer, G.P., Bender, M.L., et al., Early oxidation of organic matter in pelagic sediments of the eastern Equatorial Atlantic: Suboxic diagenesis, Geochim. Cosmochim. Acta, 1979, vol. 43, pp. 1075–1099.
Gerasimov, N.N., Geological structure and genesis of the Parnok ferromanganese deposit (Polar Urals), Extended Abstract of PhD (Geol.-Miner.) Dissertation, Moscow: MGU, 2000.
Gerasimov, N.N., Nasedkina, V.Kh., Onishchenko, S.A., and Shishkin, M.A., Mineral composition of ores in the Parnok ferromanganese deposit (Polar Urals), Geol. Ore Deposits, 1999, no. 1, pp. 81–93.
Gutzmer, J. and Beukes, N.J., The manganese formation of the Neoproterozoic Penganga Group, India — Revision of an enigma, Econ. Geol., 1998, vol. 93, pp. 1091–1102.
Hoefs, J., Stable Isotope Geochemistry, Berlin: Springer, 2009.
Honnorez, J., Von Herzen R.P., Barrett T.J., et al., Hydrothermal mounds and young ocean crust of the Galapagos: Preliminary deep sea drilling results, Init. Rep. Deep Sea Drill. Project, 1983, vol. 70, p. 459–481.
Huckriede, H. and Meischner, D., Origin and environment of manganese-rich sediments within black-shale basins, Geochim. Cosmochim. Acta, 1996.
Kholodov, V.N., Role of hydrosulfuric basins in the sedimentary ore formation, Lithol. Ore Deposits, 2002, no. 5, pp. 447–468.
Konhauser, K., Introduction to Geomicrobiology, Blackwell Publishing, 2007.
Kontar, E.S., Savel’eva, K.P., Surganov, A.V., et al., Margantsevye mestorozhdeniya Urala (Manganese Deposits of the Urals), Yekaterinburg: Ural. Geol.-S″emochn. Eksped., 1999.
Kuleshov, V.N., Geokhimiya izotopov (δ 13 S and δ 18 O) i proiskhozhdenie karbonatnykh margantsevykh rud (Geology of Isotopes (δ13S and δ18O) and Origin of Manganese Carbonate Ores), Moscow: Geoinformmark, 2001a.
Kuleshov, V.N., Evolution of isotopic carbon dioxidewater systems in lithogenesis: Communication 1. Sedimentogenesis and diagenesis, Lithol. Miner. Resour., 2001b, no. 5, pp. 485–502.
Kuleshov, V.N., Evolution of isotopic carbon dioxidewater systems in lithogenesis: Communication 2. Catagenesis, Lithol. Miner. Resour., 2001c, no. 6, pp. 603–622.
Kuleshov, V.N. and Brusnitsyn, A.I., Isotopic composition (δ13S, δ18O) and origin of carbonates in manganese deposits of the southern Urals, Lithol. Miner. Resour., 2005, no. 4, pp. 411–424.
Lein, A.Yu., Authigenic carbonate formation in the ocean, Lithol. Miner. Resour., 2004, no. 1, pp. 3–34.
Lemeshev, A.V., Vishev, V.S., D’yakonova, A.G., et al., New data on the structure of the Parnok ferromanganese deposit (Subpolar Urals), in Geologiya i mineral’nye resursy Evropeiskogo severo-vostoka Rossii (Geology and Mineral Resources of the European Northeast Russia), Syktyvkar: Geoprint, 2009, vol. 3, pp. 216–218.
Maynard, J.B., Manganiferous sediments, rocks and ores, Treatise on Geochemistry, 2003, vol. 7, pp. 289–308.
Munteanu, M., Marincea, S., Kasper, H.U., et al., Black chert-hosted manganese deposits from the Bistritei Mountains, Eastern Carpathians (Romania): Petrography, genesis and metamorphic evolution, Ore Geol. Rev., 2004, vol. 24, pp. 45–65.
Okita, P.M., Maynard, J.B., Spiker, E.C., and Force, E.R., Isotopic evidence for organic matter oxidation by manganese reduction in the formation of stratiform manganese carbonate ore, Geochim. Cosmochim. Acta, 1988, vol. 52, pp. 2679–2685.
Polgari, M., Model of formation of the carbonatic manganese ore of Urkut, Budapest: Lab. Geochem. Res., Hung. Acad. Sci., 1993a, pp. 109–128.
Polgari, M., Manganese geochemistry-reflected by black shale formation and diagenetic processes, Budapest: Lab. Geochem. Res., Hung. Acad. Sci., 1993b, pp. 128–207.
Puchkov, V.N., Batial’nye kompleksy passivnykh okrain geosinklinal’nykh oblastei (Bathyal Complexes of Passive Margins in Geosynclinal Zones), Moscow: Nauka, 1979.
Roy, S., Manganese Deposits, London: Academic Press, 1981. Translated under the title Mestorozhdeniya margantsa, Moscow: Mir, 1986.
Shishkin, M.A. and Gerasimov, N.N., The Parnok ferromanganese deposit (Polar Urals), Geol.Ore Desposits, 1995, no. 5, pp. 442–452.
Silaev, V.I., Mekhanizmy i zakonomernosti epigeneticheskogo margantsevogo mineraloobrazovaniya (Mechanisms and Regularities of the Epigenetic Manganese Mineral Formation), Yekaterinburg: UrO RAN, 2008.
Silaev, V.I. and Shiryaeva, L.L., The Parnok ferromanganese deposit: Myths and facts, Geol. Ore Deposits, 1997, no. 4, pp. 383–389.
Starikova, E.V., Inventory of low-temperature hydrothermal-sedimentary deposits in the recent ocean, in Metallogeniya drevnikh i sovremennykh okeanov-2005 (Metallogeny of Ancient and Recent Oceans-2005), Miass: IMin UrO RAN, 2005, vol. 1, p. 77.
Stolyarov, A.S., Ivleva, E.I., Khalezov, A.B., and Pechenkin, I.G., Marganets Rossii: sostoyanie, perspektivy osvoeniya i razvitiya mineral’no-syr’evoi bazy (Manganese of Russia: State and Perspective of the Development of Raw Mineral Base), Moscow: VIMS, 2009, no. 20.
Voinovskii-Kriger, K.G., Two Paleozoic complexes on the western slope of the Polar Urals, Sov. Geol., 1945, no. 6, pp. 27–44.
Yudovich, Ya.E. and Ketris, M.P., Geokhimiya chernykh slantsev (Geochemistry of Black Shales), Leningrad: Nauka, 1988.
Yudovich, Ya.E., Shishkin, M.A., Lyutikov, N.V., et al., Geokhimiya i rudogenez chernykh slantsev Lemvinskoi zony Severnogo Urala (Geochemistry and Ore Genesis of Black Shales in the Lemva Zone of the Northern Urals), Syktyvkar: Prolog, 1998.
Zykin, N.N., Geological structure and genesis of the Parnok ferromanganese deposit (Polar Urals), Vest. MGU. Ser. Geol., 2004a, no. 2, pp. 40–49.
Zykin, N.N., Geological constraints and genesis or ores in the Parnok ferromanganese deposit, Extended Abstract of PhD (Geol.-Miner.) Dissertation, Moscow: MGU, 2004b.
Zykin, N.N. and Erokhin, V.E., Mecahnism of the formation of manganese carbonate ores in the Parnok deposit (Polar Urals), in Uglerod: mineralogiya, geokhimiya i kosmokhimiya. Materialy mezhdunarodnoi konferentsii (Carbon: Mineralogy, Geochemistry, and Cosmochemistry), Syktyvkar: Geoprint, 2003, pp. 237–240.
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Original Russian Text © A.I. Brusnitsyn, V.N. Kuleshov, P.S. Kalugin, 2014, published in Litologiya i Poleznye Iskopaemye, 2014, No. 4, pp. 336–353.
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Brusnitsyn, A.I., Kuleshov, V.N. & Kalugin, P.S. Genesis of carbonates from the Parnok ferromanganese deposit, Polar Urals. Lithol Miner Resour 49, 320–335 (2014). https://doi.org/10.1134/S002449021403002X
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DOI: https://doi.org/10.1134/S002449021403002X