Abstract
The uranium concentration in phosphorites on continents and modern seafloor varies from 0.nto n· 102ppm (average 75 ppm). The average uranium concentration is 4–48 ppm in Precambrian and Cambrian deposits, 20–90 ppm in Paleozoic and Jurassic deposits, 40–130 ppm in Late Cretaceous–Paleogene deposits, 30–130 ppm in Neogene deposits, and 30–110 ppm in Quaternary (including Holocene) deposits. On the whole, the variation range is almost similar for phosphorites of different ages. The U/P2O5ratio in phosphorites ranges from less than unity to 24 · 10–4(average 3.2 · 10–4). Major phosphorite deposits of the world with ore reserves of approximately 250 Gt (or 58 Gt P2O5) contain up to 19 Mt of uranium. Uranium is present in phosphorites in the tetra- and hexavalent, i.e., U(IV) and U(VI) forms, and their ratio is highly variable. At the early diagenetic stage of the formation of marine phosphorites in a reductive environment, U(VI) diffuses from the near-bottom water into sediments. It is consequently reduced and precipitated as submicroscopic segregations of uranium minerals (mainly uraninite) that are probably absorbed by phosphatic material. During the subsequent reaction between phosphorites and aerated water and the weathering in a subaerial environment, uranium is partly oxidized and lost. The uranium depletion also occurs during catagenesis owing to a more complete crystallization of calcium phosphate and replacement of nonphosphatic components.
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Altschuler, Z.S., The Geochemistry of Trace Elements in Marine Phosphorites: Part 1. Characteristic Abundances and Enrichment, Marine Phosphorites (SEPM Spec. Publ.), 1980, no. 29, pp. 19–30.
Altschuler, Z.S., Clarke, R.S., and Young, E.Y., Geochemistry of Uranium in Apatite and Phosphorite, US Geol. Surv. Prof. Pap., 1958, vol. 314-D, pp. 45–90.
Ames, L.L., Some Cation Substitutions during the Formation of Phosphorite from Calcite, Econ. Geol., 1960, vol. 55, no. 2, pp. 354–362.
Anderson, R.T., Lehuray, A.P., Fleisher, M.Q., and Murray, J.W., Uranium Deposition in Saanich Inlet Sediments, Vancouver Island, Geochim. Cosmochim. Acta., 1989, vol. 53, pp. 2205–2213.
Banerjee, D.M., Basu, P.C. and Srivastava, N., Petrology, Mineralogy, Geochemistry, and Origin of Precambrian Aravallian Phosphorite Deposits in Udaipur and Jhabua, India, Econ. Geol., 1980, vol. 75, no. 8, pp. 1181–1189.
Banerjee, D.M., Khan, M.W.Y., Srivastava, N., and Saigul, G.S., Precambrian Phosphorites in the Bijawar Rocks of Hirapur- Bassia Areas, Sagar District, Madhya Pradesh, India, Miner. Deposita, 1982, vol. 17, pp. 349–362.
Barnes, C.E. and Cochran, J.K., Uranium Removal in Oceanic Sediments and the Oceanic Uranium Balance, Earth Planet. Sci. Lett., 1990, vol. 97, pp. 94–101.
Burnett, W.C., Baker, K.B., and Chin, P.A., Uranium-Series and AMS 14C Studies of Modern Phosphate Pellets in Peru Shelf Muds, Mar. Geol., 1998, vol. 80. no. 3/4, pp. 215–230.
Burnett, W.C. and Gomberg, D.N., Uranium Oxidation and Probable Subaerial Weathering of Phosphatized Limestone from the Pourtales Terrace, Sedimentology, 1977, vol. 24, pp. 291–302.
Burnett, W.C., Glenn, C.R., Yeh, C.C., et al., U-Series, 14C, and Stable Isotope Studies of Recent Phosphatic “Protocrusts” from the Peru Margin, Marine Authigenesis: from Global to Microbial (SEPM Spec. Publ.), 2000, no. 66, pp. 163–183.
Burnett, W.C. and Veeh, H.H., Uranium-Series Disequilibrium Studies in Phosphorite Nodules from South America, Geoch. Cosmochim. Acta, 1977, vol. 41, no. 6, pp. 755–764.
Baturin, G.N., Uranium in Mud Solutions of the Southeastern Atlantic, Dokl. Akad. Nauk SSSR, 1971, vol. 198, no. 5, pp. 1186–1188.
Baturin, G.N., Uranium in the Modern Marine Sedimentary Cycle, Geokhimiya, 1973, no. 6, pp. 1362–1372.
Baturin, G.N., Uran v sovremennom morskom osadkoobrazovanii (Uranium in the Modern Marine Sedimentation), Moscow: Atomizdat, 1975.
Baturin, G.N., Fosfority na dne okeanov (Phosphorites on the Ocean Floor), Moscow: Nauka, 1978.
Baturin, G.N., Rudy okeana (Ores of the Ocean), Moscow: Nauka, 1993.
Baturin, G.N. and Dubinchuk, V.T., Modes of Uranium Occurrence in Oceanic Phosphorites, Okeanologiya, 1978, vol. 18, no. 6, pp. 1036–1041.
Baturin, G.N. and Dubinchuk, V.T., Mikrostruktury okeanskikh fosforitov (Microtextures of Oceanic Phosphorites), Moscow: Nauka, 1979.
Baturin, G.N. and Dubinchuk, V.T., Mineralogy of Phosphatic Sands from the Namibian Shelf, Litol. Polezn. Iskop., 1999, no. 6, pp. 632–646.
Baturin, G.N. and Kochenov, A.V., Uranium Content in Oceanic Phosphorites, Litol. Polezn. Iskop., 1974, no. 1, pp. 124–129.
Baturin, G.N., Dubinchuk, V.T., and Kochenov, A.V., Uranium in the Process of Modern Phosphorite Formation, Geokhimiya, 1986, no. 9, pp. 1277–1284.
Baturin, G.N., Kochenov, A.V., and Dubinchuk, V.T., Uranium in Phosphorites from Seamounts of the Pacific Ocean, Litol. Polezn. Iskop., 1982, no. 1, pp. 3–10.
Baturin, G.N., Kochenov, A.V., and Kovaleva, S.A., Some Features of Uranium Distribution in Muds of the Black Sea, Dokl. Akad. Nauk SSSR, 1966, vol. 166, no. 3, pp. 698–701.
Baturin, G.N., Kochenov, A.V., and Senin, Yu.M., Uranium Concentration in Modern Oceanic Sediments in Upwelling Zones, Geokhimiya, 1971, no. 4, pp. 456–462.
Belova, L.N., Gorshkov, A.I., Doinikov, O.A., et al., A New Uranous Phosphate, Dokl. Akad. Nauk, 1996, vol. 349, no. 3, pp. 361–363.
Bliskovskii, V.Z., Kurskite in Phosphorites, Litol. Polezn. Iskop., 1976, no. 3, pp. 75–84.
Bushinskii, G.N., Drevnie fosfority Azii i ikh genesis (Ancient Phosphorites in Asia and Their Genesis), Moscow: Nauka, 1966.
Cathcart, J.B., Uranium in Phosphate Rock, US Geol. Surv. Prof. Paper, 1978, no. 988-A, pp. A1–A6.
Chentsov, I.G., Problem of the Occurrence Mode of Uranium in Phosphorites, At. Energ., 1956, vol. 1, no. 5, p. 113.
Cook, P.J., Petrology and Geochemistry of the Phosphate Deposits of Northwest Queensland, Australia, Econ. Geol., 1972, vol. 67, no. 8, pp. 1193–1213.
Cook, P.J. and O'Brian, G.W., Neogene to Holocene Phosphorite of Australia, Phosphate Deposits of the World, vol. 3: Neogene to Modern Phosphorites, Burnett, W.C. and Riggs, S.R., Eds., Cambridge: Univ. Press, 1990, pp. 98–115.
Dubinchuk, V.T., Kochenov, A.V., Ruzhitskii, V.V., and Meshchankina, V.I., Modes of Exogenous Epigenetic Uranium Mineralization in Sedimentary Rocks (Based on SEM Data), Litol. Polezn. Iskop., 1990, no. 3, pp. 65–72.
Gaspar, L.C., Alguns aspectos geoquimicos sobre fosforites da margem continental Portugues, Diss., Univ. de Aveiro, 1981.
Gassan, A.A., Geological Features and Mineral Composition of Upper Cretaceous Uraniferous Granular Phosphorites of the Palmir Region, Siberia, PhD (Geol.-Mineral.) Dissertation, Leningrad: Lenin. Gorn. Inst., 1983.
Gavshin, V.M., Bobrov, V.N., and Zorkina, L.S., Quantitative Relationships between Uranium and Phosphorus in Phosphorites and Phosphatic Rocks, Litol. Polezn. Iskop., 1974, no. 6, pp. 118–126.
Gulbrandsen, R.A., Chemical Composition of Phosphorites of the Phosphoria Formation, Geoch. Cosmochim. Acta, 1966, vol. 30, pp. 769–778.
Heinrich, E., Mineralogy and Geology of Radioactive Raw Materials, New York, 1958. Translated under the title Mineralogiya i geokhimiya radioaktivnogo mineral'nogo syr'ya, Moscow: Inostrannaya Literatura, 1962.
Howard, P.F. and Hough, M.J., On the Geochemistry and Origin of the D Tree, Wonarah, and Sherrin Creek Phosphorite Deposits of the Georgina Basin, Northern Australia, Econ. Geol., 1979, vol. 74, no. 2, pp. 260–284.
Il'in, A.V., Drevnie fosfatonosnye basseiny (Ancient Phosphate- Bearing Basins), Moscow: Nauka, 1990.
Il'in, A.V. and Volkov, R.I., Geochemistry of Uranium in Vendian-Cambrian Phosphorites, Geokhimiya, 1994, no. 7, pp. 1042–1051.
Karpova, M.I., Sostav i genezis mezozoiskikh fosforitov vostoka Russkoi platformy (The Composition and Genesis of Mesozoic Phosphorites in the Eastern European Platform), Moscow: Nauka, 1982.
Kholodov, V.N., Rare and Radioactive Elements in Phosphorites, Tr. IMGRE, 1963, issue 17, pp. 67–108.
Kholodov, V.N., Osadochnyi rudogenez i metallogeniya vanadiya (Sedimentary Ore Genesis and Metallogeny of Vanadium), Moscow: Nauka, 1973.
Kholodov, V.N. and Bliskovskii, V.Z., Geochemistry of Trace Elements in Phosphate-Bearing Sediments, Litologiya fosforitonosnykh otlozhenii (Lithology of Phosphorite-Bearing Sediments), Moscow: Nauka, 1976.
Kholodov, V.N. and Mineev, D.S., Rare Elements in Phosphorites, Veshchestvennyi sostav fosforitov (Mineral Composition of Phosphorites), Moscow: Nauka, 1979, pp. 46–65.
Kholodov, V.N. and Paul, R.K., The Black Sea: A Geochemical Model of Phosphate Deposition, Litol. Polezn. Iskop., 1995, no. 6, pp. 563–581.
Klinkhammer, G. and Palmer, M.R., Uranium in the Oceans: Where It goes and Why, Geochim. Cosmochim. Acta, 1991, vol. 55, pp. 1799–1806.
Kniewald, G. and Brancia, M., Role of Uranium (V) in Marine Sedimentary Environments: A Geochemical Possibility, Mar. Chem., 1988, vol. 24, pp. 1–12.
Kochenov, A.V., Dubinchuk, V.T., and Germogenova, E.V., Modes of Uranium Occurrence in Phosphatic Remains of Fossil Fish, Sov. Geol., 1973, no. 3, pp. 69–77.
Kochenov, A.V., Korolev, K.G., Dubinchuk, V.T., and Medvedev, Yu.A., Conditions of Uranium Precipitation from Hydrous Solutions (Based on Experimental Data), Geokhimiya, 1977, no. 11, pp. 1711–1716.
Kolodny, Y., Phosphorites, The Sea, New York: Wiley, 1981, vol. 7, pp. 981–1023.
Kolodny, Y. and Kaplan, I.R., Uranium Isotopes in Sea Floor Phosphorites, Geochim. Cosmochim. Acta, 1970, vol. 34, pp. 3–24.
Kolodny, Y. and Kaplan, I.R., Deposition of Uranium in the Sediment and Interstitial Water of an Anoxic Fjord, Proc. Symp. on Hydrogeochemistry and Biogeochemistry, Tokyo, 1973, vol. 1, pp. 418–442.
Langmuir, D., Uranium Solution-Mineral Equilibria at Low Temperatures with Applications to Sedimentary Ore Deposits, Geochim. Cosmochim. Acta, 1978, vol. 42, pp. 547–569.
Levina, S.D., Smilkstyn, A.O., and Karpov, L.N., Radioactivity of Phosphorites, Litologiya fosforitonosnykh otlozhenii (Lithology of Phosphorite-Bearing Sediments), Sokolov, A.S., Ed., Moscow: Nauka, 1976, pp. 148–155.
Lianjun, Y., Qiying, C., Dongxu, Z., et al., The Phosporirtes of China, Beijing: Inst. Geol., 1989.
Lucas, J. and Abbas, M., Uranium in Natural Phosphorites: Syrian Example, Bull. Sci. Geol. Strasbourg, 1989, vol. 42, pp. 223–236.
Makarov, E.S., Crystal Chemistry of Uranium Minerals, Osnovnye cherty geokhimii urana (Main Features of the Geochemistry of Uranium), Vinogradov, A.P., Ed., Moscow: Akad. Nauk SSSR, 1963, pp. 27–45.
Manskaya, S.M. and Drozdova, T.V., Geokhimiya organicheskogo veshchestva (Geochemistry of Organic Matter), Moscow: Nauka, 1964.
Mathews, A. and Nathan, Y., The Decarbonation of Carbonate -Fluor-Apatite (Francolite), Am. Mineral., 1977, vol. 62, no. 5/6, pp. 565–573.
Mazor, E., Notes Concerning the Geochemistry of Phosphorus, Fluorine, Uranium, and Radium in Some Marine Rocks of Israel, Israel J. Earth Sci., 1963, vol. 12, pp. 41–52.
McArthur, J.M., Francolite Geochemistry—Compositional Controls during Formation, Metamorphism, and Weathering, Geochim. Cosmochim. Acta, 1985, vol. 49, no. 1, pp. 23–35.
McArthur, J.M., Benmore, R.A., Coleman, M.L., et al., Stable Isotopic Characterization of Francolite Formation, Earth Planet. Sci. Lett., 1986, vol. 77, no. 1, pp. 20–34.
McConnell, D., Apatite, Its Crystal Chemistry, Mineralogy, Utilization, and Geologic and Biologic Occurrences, New York: Springer, 1973.
McKelvey, V.E., Uranium in Phosphate Rock, US Geol. Surv. Prof. Paper, 1956, no. 300.
McKelvey, V.E., Everhart, D.L., and Garrels, R.M., Origin of Uranium Deposits, Econ. Geol., 1955, part I, pp. 465–533.
Meunier-Christmann, C., Lucas, J., and Albraht, P., Organic Geochemistry of Moroccan Phosphorites and Bituminous Shales, Bull. Sci. Geol. Strasbourg, 1989, vol. 42, pp. 205–222.
Nabil, F., Geochemistry of Phosphorites from the Metladi Deposit, Tunis, Extended Abstracts of PhD (Geol.-Miner.) Dissertation, Moscow: Mosk. Geol.-Razv. Inst., 1992.
Naumov, G.B., Kochenov, N.V., Gerasimovskii, V.I., and Germanov, A.I., Uranium in Sedimentary Rocks, Osnovnye cherty geokhimii urana (Principle Features of the Uranium Geochemistry), Vinogradov, A.P., Ed., Moscow: Akad. Nauk SSSR, 1963, pp. 238–289.
Opredelenie urana lazerno-lyuminestsentnym metodom (Determination of Uranium by the Laser Luminescence Method), Instruction 421-X (Accepted by the Scientific Council on Analytical Methods), Moscow: Ministerstvo Geologii SSSR, 1988.
Parrish, J.T., Ziegler, A.M., and Hampherville, R.G., Upwelling in the Paleozoic Era, Coastal Upwelling—Its Sediment Record, Suess, E. and Thiede, J., Eds., New York: Plenum, 1983, pp. 553–578.
Phosphate Deposits of the World, vol. 1: Proterozoic and Cambrian Phosphorites, Cook, P.D. and Shergold, J.H., Eds., Cambridge: Univ. Press, 1986.
Pokryshkin, V.I., Zakonomernosti razmeshcheniya promyshlennykh mestorozhdenii fosforitov dokembriya i fanerozoya mira (Regularities of the Localization of Precambrian and Phanerozoic Commercial-Grade Phosphorite Deposits in the World), Moscow: Nedra, 1981.
Powell, T.G., Cook, P.J., and McKirdy, D.M., Organic Geochemistry of Phosphorites: Relevance to Petroleum Genesis, AAPG Bull., 1975, vol. 59, no. 4, pp. 618–632.
Price, N.B. and Calvert, S.E., The Geochemistry of Phosphorites from the Namibian Shelf, Chem. Geol., 1978, vol. 23, no. 2, pp. 151–170.
Rozhkova, E.V., Razumnaya, E.G., Serebryakova, M.B., and Shcherbak, O.V., Role of Sorption in the Concentration of Uranium in Sedimentary Rocks, Trudy 2 Mezhdunarodnoi konferentsii po mirnomu ispol'zovaniyu atomnoi energii v Zheneve (Proc. 2nd Int. Conf. on the Peaceful Utilization of Atomic Energy in Geneva), Moscow: Atomizdat, 1959, vol. 8, pp. 300–311.
Serebryakova, M.B. and Razumnaya E.G., Problem of the Occurrence Mode of Uranium in Apatite, Dokl. Akad. Nauk SSSR, 1962, vol. 143, no. 6, pp. 153–156.
Shakhin, D.S., Petrographic Composition and Genesis of Commercial-Grade Phosphorite Deposits in Siberia, Extended Abstracts of DSc (Geol.-Miner.) Dissertation, Moscow: Mosk. Geol-Razv. Inst., 1991.
Sheldon, R.P., Geochemistry of Uranium in Phosphorites and Black Shales of the Phosphoria Formation, US Geol. Surv. Bull., 1959, no. 1084-D.
Smirnov, A.I., Veshchestvennyi sostav i usloviya formirovaniya osnovnykh tipov fosforitov (Mineral Composition and Formation Constraints of Major Phosphorite Types), Moscow: Nedra, 1972.
Sokolov, A.S., Phosphorus in Stratisphere, Dokl. Akad. Nauk, 1995, vol. 344, no. 3, pp. 370–373.
Sokolov, A.S., Evolution of Uranium Mineralization in Phosphorites, Geokhimiya, 1996, no. 11, pp. 1117–1119.
Stephens, N.P. and Carrol, A.R., Salinity Stratification in the Permian Phosphoria Sea: A Proposed Paleomodel, Geology, 1999, vol. 27, no. 10, pp. 899–902.
Strutt, R., On the Distribution of Radium in the Earth's Crust, Proc. R. Soc. London, 1906, Ser. A, no. 78, pp. 150–153.
Strutt, R., The Accumulation of Helium in Geological Time, Proc. R. Soc. London, 1908, Ser. A, no. 81, pp. 272–277.
Thompson, J., Calvert, S.E., Mukherjee, S., Burnett, W.C., and Bremner, J.M., Further Studies of the Nature, Composition, and Ages of Contemporary Phosphorite from the Namibian Shelf, Earth Planet. Sci. Lett., 1984, vol. 69, no. 2, pp. 341–353.
Thomson, J., Wallace, H.E., Colley, S., and Toole, J., Authigenic Uranium in Atlantic Sediments of the Last Glacial Stage—A Diagenetic Phenomenon, Earth Planet. Sci. Lett., 1990, vol. 98, pp. 222–232.
Veeh, H.H., Calvert, S.E., and Price, N.B., Accumulation of Uranium in Sediments and Phosphorites on the South West African Shelf, Mar. Chem., 1974, vol. 2, no. 2, pp. 189–202.
Whittaker, E.J.W., and Muntus, R., Ionic Radii for Use in Geochemistry, Geochim. Cosmochim. Acta, 1970, vol. 34, pp. 945–956.
Zanin, Yu.N., Gilinskaya, L.G., Krasil'nikova, N.A., et al., Typomorphism of Calcium Phosphates in Phosphorites, Geol. Rudn. Mestorozhd., 1985, no. 4, pp. 85–103.
Zanin, Yu.N., Zamirailova, A.G., Fomin, A.N., and Pisareva, G.M., Strontium in the Sedimentary Apatite Structure during Catagenesis, Dokl. Akad. Nauk, 1997, vol. 352, no. 2, pp. 235–237.
Zanin, Yu.N., Zamirailova, A.G., Gilinskaya, L.G., Fomin, A.N., and Kireev, A.D., Uranium in the Sedimentary Apatite during Catagenesis, Geokhimiya, 2000a, no. 5, pp. 502–509.
Zanin, Yu.N., Zamirailova, A.G., and Pisareva, G.M., Cadmium, Vanadium, and Zinc in Phosphorites during Catagenesis, Dokl. Akad. Nauk, 2000b, vol. 374, no. 2, pp. 228–231.
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Baturin, G.N., Kochenov, A.V. Uranium in Phosphorites. Lithology and Mineral Resources 36, 303–321 (2001). https://doi.org/10.1023/A:1010406103447
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DOI: https://doi.org/10.1023/A:1010406103447