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Vol 242
Pages:
139-149
Download volume:
RUS ENG
Research article
Geology

Composition and probable ore igneous rocks source of columbite from alluvial deposits of Mayoko district (Republic of the Congo)

Authors:
Idylle Plachini Loufouandi Matondo1
Mikhail A. Ivanov2
About authors
  • 1 — Postgraduate Student Saint Petersburg Mining University
  • 2 — д-р геол.-минерал. наук Professor Saint Petersburg Mining University ▪ Elibrary ▪ Scopus
Date submitted:
2019-10-17
Date accepted:
2020-01-24
Date published:
2020-04-26

Abstract

The article presents the results of optical, electron microscopic and electron microprobe studies of columbite group minerals, collected during heavy mineral concentrate sampling of alluvial deposits in the Mayoko region (Republic of the Congo). The aim of the study is revealing tantalum niobates ore body in this region. We found that these minerals in loose deposits are represented by two grain-size groups: less than 1.6 mm (fine fraction) and 1.6-15 mm (coarse fraction). The grains of both fractions belong mainly to columbite-(Fe), less often to columbite-(Mn), tantalite-(Mn) and tantalite-(Fe), contain impurities of Sc, Ti, and W. The crystals have micro-scaled zoning (zones varies slightly in the Ta/Nb ratio values) and contains a lot of mineral inclusions and veins represented by zircon, pyrochlore supergroup minerals and others. Columbite-(Fe) and columbite-(Mn) are characterized by an increased content of Ta 2 O 5 up to the transition to tantalite-(Fe) and tantalite-(Mn). This allows us to exclude the formation of subalkaline rare-metal granites, their metasomatites (albitites and greisenes) and carbonatites, from the list of possible columbite ore rocks source in the Mayoko district. Thus, beryl type and complex spodumene subtype rare-element pegmatites of the mixed petrogenetic family LCT-NYF (according to P.Černý) should be considered as a probable root source. The results of the research should be taken into account when developing the methodology for prospecting in this area.

Keywords:
columbite group minerals columbite-(Fe) – ferrocolumbite columbite-(Mn) – manganocolumbite tantalite-(Mn) – manganotantalite and tantalite-(Fe) – ferrotantalite alluvial placers rare metal pegmatites Mayoko area Republic of the Congo
10.31897/pmi.2020.2.139
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References

  1. Atlas of rare elements bearing minerals and ores. Ed. by A.I.Ginzburg. Moscow: Nedra, 1977, p. 264 (in Russian).
  2. Beskin S.M. Geology and indicative geochemistry of tantalum-niobium deposits in Russia (rare-metal granites). Moscow: Nauchnyi mir, 2014, p. 112 (in Russian).
  3. Voloshin A.V., Pakhomovskii Ya.A. Minerals and evolution of mineral formation in amazonite pegmatites of the Kola Peninsula. Leningrad: Nauka, 1986, p. 168 (in Russian).
  4. Voloshin A.V., Pakhomovskii Ya.A. Mineralogy of tantalum and niobium in rare-metal pegmatites. Leningrad: Nauka, 1988, p. 242 (in Russian).
  5. Voloshin A.V. Tantalum niobates Systematics, crystal chemistry and the evolution of mineral formation in granite pegmatites. St. Petersburg: Nauka, 1993, p. 298 (in Russian).
  6. Geochemistry, mineralogy and genetic types of rare elements deposits. Ed. by K.A.Vlasov. Moscow: Nauka, 1964. Vol. 2: Mineralogiya redkikh elementov, p. 830 (in Russian).
  7. Geochemistry, mineralogy and genetic types of rare elements deposits. Ed. by K.A.Vlasov. Moscow: Nauka, 1966. Vol. 3: Geneticheskie tipy mestorozhdenii redkikh elementov, p. 860 (in Russian).
  8. Ginzburg A.I., Timofeev I.N., Feldman L.G. Fundamentals of the granite pegmatites geology. Moscow: Nedra, 1979, p. 296 (in Russian).
  9. Zagorskii V.E., Kuznetsova L.G., Makrygina V.A., Makagon V.M., Shmakin B.M. Granite pegmatites. Vol. 2. Rare metal pegmatites. Novosibirsk: Nauka. Sibirskoe predpriyatie RAN, 1997, p. 285 (in Russian).
  10. Grigorev V.M., Dolginov E.A., Ponikarov V.P. Geology and minerals of Africa. Moscow: Nedra, 1990, p. 415 (in Russian).
  11. Smirnov V.I., Ginzburg A.I., Grigorev V.M., Yakovlev G.F. Handbook of ore deposits. Moscow: Nedra, 1986, p. 360 (in Russian).
  12. Minerals. Vol. 2. Issue. 3: Complex oxides, titanates, niobates, tantalates, antimonates, hydroxides. Ed. by F.V.Chukhrov, E.M.Bonshtedt-Kupletskaya. Moscow: Nauka, 1967, p. 676 (in Russian).
  13. Rozin M.S. Mineral wealth of Africa. Moscow: Mysl, 1972, p. 336 (in Russian).
  14. Solodov N.A. Internal structure and geochemistry of rare-metal granite pegmatites. Moscow: Izd-vo Akademii nauk SSSR, 1962, p. 234 (in Russian).
  15. Solodov N.A., Semenov E.N., Burkov V.V. Geological handbook of heavy lithophile rare metals. Ed. by N.P.Laverov. Moscow: Nedra, 1987, p. 438 (in Russian).
  16. Solodov N.A. Scientific basis of rare-metal pegmatitis prospective assessment. Moscow: Nauka, 1971, p. 292 (in Russian).
  17. Solodov N.A. Minerageny of rare-metal formations. Moscow: Nedra, 1985, p. 224 (in Russian).
  18. Beskin S.M., Marin Yu.B., Matias V.V., Gavrilova S.P. So what is "rare metal granite"? Zapiski Vserossiiskogo mineralogicheskogo obshchestva. 1999. N 6, p. 28-40 (in Russian).
  19. Shmakin B.M. Pegmatite deposits of foreign countries. Moscow: Nedra, 1987, p. 224 (in Russian).
  20. Anderson M.O., Lentz D.R., Mcfarlane C.R.M., Falck H. A geological, geochemical and textural study of a LCT pegmatite: implications for the magmatic versus metasomatic origin of Nb-Ta mineralization in the Moose II pegmatite, Northwest Territories, Canada. Journal of Geosciences. 2013. N 58, p. 299-320. DOI: 10.3190/jgeosci.149
  21. Melcher F., Graupner T., Henjes-Kunst F., Oberthür T., Sitnikova M., Gäbler E., Gerdes A., Brätz H., Davis D., Dewaele S. Analytical fingerprint of columbite-tantalite (coltan) mineralisation in pegmatites – Focus on Africa: Ninth International Congress for Applied Mineralogy, Brisbane, QLD, 8-10 September, 2008, p. 615-624.
  22. Belkasmi М., Cuney M. Les columbo-tantalites zonées du granite de Montebras (Massif central francais). Implications pétrogénétiques. Comptes Rendus de l'Académie des Sciences – Series IIA – Earth and Planetary Science. 1998. Vol. 326. Iss. 7, p. 459-465. DOI: 10.1016/S1251-8050(98)80060-8
  23. Černý P. Characteristics of pegmatite deposits of tantalum: Lanthanides, Tantalum and Niobium. Special Publication N 7 of the Society for Geology Applied to Mineral Deposits. 1989, p. 195-239.
  24. Černý P. Rare-element Granitic Pegmatites. Part I: Anatomy and Internal Evolution of Pegmatit Deposits. Geoscience Canada. 1991. Vol.18. N 2, p. 49-67.
  25. Breiter K., Korbelová Z., Chládek Š., Uher P., Knesl I., Rambousek P., Honig S., Šešulka V. Diversity of Ti-Sn-W-Nb-Ta oxide minerals in the classic granite-related magmatic-hydrothermal Cínovec. Zinnwald Sn-W-Li deposit (Czech Republic). European Journal of Mineralogy. 2017. Vol. N 4, p. 727-738. DOI: 10.1127/ejm/2017/0029-2650
  26. Ercit T.S. The geochemistry and crystal chemisty of columbite-group minerals from granitic pegmatites, south western Grenville province, Canadian shield. The Canadian Mineralogist. 1994. Vol. 32, p. 421-438.
  27. Helba H., Trumbull R.B., Morteani G., Khalil S.O., Arslan A. Geochemical and petrographic studies of Ta mineralization in the Nuweibi albite granite complex, Eastern Desert, Egypt. Mineralium Deposita. 1997. N 32, p. 164-179.
  28. Ixer R.A., Ashworth J.R., Pointer C.M. Accessory mineralogy of the Ririwai biotite granite, Nigeria, and its albitized and greisenized facies. Geological Journal. 1987. Vol. 22, p. 403-427.
  29. Tindle A.G., Brearks F.W. Columbite-tantalite mineral chemistry from rare-element granitic pegmatites: Separation Lakeharea, N.W. Ontario, Canada. Mineralogy and Petrology. 2000. N 70, p. 165-198. DOI: 10.1007/S007100070002
  30. Deng X.-D., Li J.-W., Zhao X.-F., Hu Z.-C., Hu H., Selby D., de Souza Z.S. U-Pb isotope and trace element analysis of columbite-(Mn) and zircon by laser ablation ICP-MS: Implications for geochronology of pegmatite and associated ore deposits. Chemical Geology. 2013. Vol. 344, p. 1-11. DOI: 10.1016/jchemgeo.2013.02.014
  31. Wise M.A., Cerný P., Falster A.U. Scandium substitution in columbite-group minerals and ixiolite. The Canadian Mineralogist. 1998. Vol. 36(2), p. 673-680.

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