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    Wyświetlanie 1-3 z 3
    Tytuł:
    An Overview of Rare Earth Ores Beneficiation in Vietnam
    Autorzy:
    Nhu, Thi Kim Dung
    Pham, Van Luan
    Vu, Thi Chinh
    Tran, Van Duoc
    Powiązania:
    https://bibliotekanauki.pl/articles/2020059.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    rare earth
    monazite
    xenotime
    bastnaesite
    ziemie rzadkie
    Wietnam
    metale rzadkie
    Opis:
    Rare earth metals are used in electricity, electronics, nuclear, optics, space, metallurgy, superconducting and super magnetic materials, glass and ceramics, and agriculture. Some rare earth elements are added to fertilizers for crops and some trials for animal feed. Rare earth elements, except for radioactive promethium, are relatively abundant in the earth's crust. Vietnam has a tremendous rare earth potential, distributed mainly in the Northwest, including Nam Xe, Dong Pao, Muong Hum, and Yen Bai. There are many research projects on rare earth ores of different types globally, but the focus is mainly on the essential minerals, including monazite, xenotime, and bastnaesite. This report summarizes research data on rare earth ore intending to produce a general assessment of rare earth ore and its beneficiation technology in Vietnam.
    Źródło:
    Inżynieria Mineralna; 2021, 2; 227--236
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petrogenetic and Compositional Features of Rare Metal PanAfrican Post-Collisional Pegmatites of Southwestern Nigeria; A Status Review
    Autorzy:
    Oyebamiji, A.
    Adewumi, A. J. P.
    Zafar, T.
    Odebunmi, A.
    Falae, P.
    Fadamoro, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/100804.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Śląski. Wydział Nauk o Ziemi
    Tematy:
    rare metals
    petrogenesis
    pegmatites
    granite
    southwestern Nigeria
    metale rzadkie
    pegmatyt
    petrogeneza
    granit
    Nigeria południowo-zachodnia
    Opis:
    This research reviews the geology, petrogenesis, compositional trends and geochronology of the rare-metal pegmatite of southwestern Nigeria. The source of these pegmatites is still presently debated which have been explained as either product of highly fractionated molten material or anatexis of the local crust. However, published works of past authors have been compiled to give a detailed understanding of the formation of the mineral deposits. The basement complex of southwestern Nigeria comprises of Precambrian rocks of amphibolite, the hornblende gneiss and the granite gneisses which were formed as a result of the opening and closing of the ensialic basin with significant, extensive subduction during the Pan-African orogeny. The pegmatites in this region have shown internal zoning and a high degree of evolution from the border zone to the core zone during the crystallization and solidification of the felsic granite to pegmatite melt. The rare-metal pegmatites have distinct chemical compositions and mineralogy, containing quartz, biotite, muscovite, microcline, garnet with localized tourmaline, tantalite and columbite. These pegmatites vary significantly by their bulk-rock and mineral chemistry which indicates a more peraluminous attribute and enrichments of lithophile elements of Rb, Cs, Ta and Ba. Previous K/Ar isotopic ages (502.8±13.0 Ma and 514.5±13.2 Ma) suggest that the pegmatites are related to the post-collisional phase of intensive metasomatism. Adopted from previous studies, a five-stage conceptual model of evolution which is widely accepted have been proposed for the origin of the pegmatites.
    Źródło:
    Contemporary Trends in Geoscience; 2018, 7, 2; 166-187
    2299-8179
    Pojawia się w:
    Contemporary Trends in Geoscience
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    W poszukiwaniu surowców krytycznych dla Polski. Republika Konga : geologia, potencjał surowcowy, warunki koncesyjne
    In search of critical raw materials for Poland: Republic of the Congo : geology, mineral resources potential, concession condi-tions.
    Autorzy:
    Strzelecki, S.
    Wołkowicz, Stanisław
    Elenga, Hilaire
    Kounkou, Ghynel R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2076185.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    surowce krytyczne
    ropa naftowa
    BIF
    sole potasowe
    fosforany
    rudy polimetaliczne
    metale rzadkie
    koltan
    prawo górnicze
    critical raw materials
    crude oil
    potassium salts
    phosphates
    polymetallic ores
    rare metals
    coltan
    mining law
    Opis:
    For its development, Polish economy needs a number of mineral raw materials that are not present in the country. An important way to increase the country's raw material security is to search for the necessary raw materials abroad. Among such countries is the Republic of the Congo. Advantageous geographic location with access to the Atlantic Ocean, the presence of geological structures rich in various mineral resources, such as tin, tungsten, coltan (Ta-Nb ore), polymetals (Cu-Pb-Zn), iron (BIF deposits), potassium salts and phosphate rock, as well as favourable legal regulations promoting foreign investments, make the Republic of the Congo a country with which Poland should cooperate in the field of raw materials and mining industries. A relatively small part of the Republic of the Congo is well explored, but the potential of undiscovered mineral resources is very large. Poland, having a well-educated cadre of geologists, can and should share its experiences with specialists working in the geological survey of the Republic of the Congo. Such cooperation can bring many benefits to both cooperating countries.
    Źródło:
    Przegląd Geologiczny; 2021, 69, 6; 339--355
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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