skip to main content
Idioma:

ACCESSORY NIOBIUM-TANTALUM MINERALS OF THE ALEISK GRANITE MASSIF (N-W RUDNY ALTAY AREA)

Konstantin L. Novoselov

Izvestiâ Tomskogo politehničeskogo universiteta. Inžiniring georesursov, 2020-02, Vol.331 (2), p.38-44 [Periódico revisado por pares]

Tomsk Polytechnic University

Texto completo disponível

Citações Citado por
  • Título:
    ACCESSORY NIOBIUM-TANTALUM MINERALS OF THE ALEISK GRANITE MASSIF (N-W RUDNY ALTAY AREA)
  • Autor: Konstantin L. Novoselov
  • Assuntos: accessory minerals ; columbite ; granitoids ; ilmenorutile ; rudny altay
  • É parte de: Izvestiâ Tomskogo politehničeskogo universiteta. Inžiniring georesursov, 2020-02, Vol.331 (2), p.38-44
  • Descrição: Relevance of the research. Accessory niobioum-tantalum mineralization of granitoids is an important additional feature at detecting potential rare-metal ore content of leucogranites, which are the derivatives of the final stage of polyphase Aleisk granitoid massif (D2–3) formation. The aim of the research is to discover the forms of niobium and tantalum occurrence as well as the other corresponding rare elements. It includes investigation of their spread and possibilities for their usage as minerals-indicators for conditions of leucogranite formation. Methods: traditional mineralogical and petrographic studies of accessory mineral composition in artificial crushed samples, the initial weight of which is about 5–8 kg. Analytical investigation of minerals is performed in the Institute of Geology and Mineralogy (SB RAS, Novosibirsk), using an electronic scanning microscope JSM–6510LV (Jeol Ltd) with an energy dispersive spectrometer INCA Energy 350+ (the analyst M.V. Khlestov, junior research scientist). X-ray fluorescent microscope is used (the Division for Geology, School of Earth Science and Engineering, TPU, the analyst M.A. Rudmin, Cand. Sc.). Results. Two forms of niobium and tantalum occurrence are discovered in the leucogranite of the Aleisk massif: 1) structural impurity in titanite, zircon, and apatite; 2) individual minerals of niobium and tantalum – ilmenorutile and columbite. Usually niobium concentrations dominate distinctly over tantalum. The striking feature of chemistry of accessory columbite is its high ferruginosity, and enhanced concentrations of impurity scandium correspond to a rare type – scandium ferrocolumbite. Crystallization of niobium minerals (ilmenorutile and columbite) occurred at the post-magmatic period of leucogranite intrusive formation during the alkali stage of autometasomatism. Notably, ilmenorutile is an older mineral in regard to columbite.
  • Editor: Tomsk Polytechnic University
  • Idioma: Russo
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.