Results 41 to 50 of about 7,282 (216)
THE PROBLEM OF CARBONATITES AND CARBONATITE COMPLEXES
Geological Journal, 2016 На підставі аналізів авторських та літературних даних зроблено висновок про те, що первинний склад більшості карбонатитів був лужнокарбонатний типу карбонатитів і туфів вулкану Олдоіньо-Лентаї (з високим вмістом Na2CO3, K2CO3, CaCO3 і підпорядкованим – MgCO3, FeCO3).
openaire +3 more sources
Rare earth element transport and mineralization linked to fluids from carbonatite systems
GeologyRare earth elements are critical constituents for modern technologies, and some of their largest natural resource deposits are related to carbonatite systems.
E. A. A. Mororó +3 more
semanticscholar +1 more source
PHOSPHATE-FLUORIDE-CARBONATE MINERALIZATION IN LAMPROITE ROCKS OF THE RYABINOVY PLUTON (CENTRAL ALDAN): MINERALOGICAL AND GEOCHEMICAL FEATURES AND ORIGIN [PDF]
Минералогия, 2017 Carbonate and apatite-fluorite mineral assemblages are studied in lamproite rocks from high-K Ryabinovy intrusive (Central Aldan, Russia). It is concluded that these assemblages are genetically related and belong to the same apatite-fluorite-carbonate ...
I.F. Chayka, A.E. Izokh
doaj
Magnetite in Sokli carbonatite massif and in Tulppio olivinite [PDF]
Bulletin of the Geological Society of Finland, 1981 Occurrence, ilmenite exsolutions and composition of magnetite in the carbonatite massif of Sokli and in the olivinite of Tulppio have been studied. In the carbonatite massif, magnetite of magmatic carbonatites is hypidio-idiomorphic, contains only very ...
K. Heinänen, H. Vartiainen
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The origin and composition of carbonatite-derived carbonate-bearing fluorapatite deposits
Mineralium Deposita, 2020 Carbonate-bearing fluorapatite rocks occur at over 30 globally distributed carbonatite complexes and represent a substantial potential supply of phosphorus for the fertiliser industry.
S. Broom-Fendley +7 more
semanticscholar +1 more source
Comptes Rendus. Géoscience, 2021 Carbonatites are unusual C-rich alkaline magmas that have been reported throughout the geological record. Nevertheless, there is only one currently active carbonatite system on Earth: Oldoinyo Lengai stratovolcano in northern Tanzania (God’s mountain in ...
France, Lydéric +2 more
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Geoscience Frontiers, 2020 The newly-discovered supergiant Huayangchuan uranium (U)-polymetallic (Sr, Se, REEs, Ba, Nb and Pb) deposit is located in the Qinling Orogen, central China.
Hui Zheng +5 more
semanticscholar +1 more source
Geology and Geochemistry of the Early Proterozoic Kortejärvi and Laivajoki Carbonatites, Central Fennoscandian Shield, Finland [PDF]
Bulletin of the Geological Society of Finland, 1997 This paper provides for the first time extensive petrological, mineralogical and geochemical data on the early Proterozoic Kortejärvi and Laivajoki carbonatites, northern Finland, which form metamorphosed and highly strained bodies 2 and 4 km long within
J. Nykänen, K. Laajoki, J. Karhu
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Dizhi lixue xuebao[ Objective ] Carbonatites, as magmatic-origin rocks, are crucial source rocks for uranium, rare earth, and other minerals. They are widely distributed in the Xiaoqinling region of Shaanxi, giving rise to numerous large to super-large carbonatite ...
KANG Qingqing +7 more
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, 2020 The origin of dolomite that hosts the Bayan Obo REE-Nb-Fe deposit (57.4 Mt.@6% REE2O3, 2.16 Mt.@0.13% Nb2O5, and >1500 Mt.@35% iron oxides) has been controversial for decades, but it is integral to understanding of the genesis of this giant deposit.
Shang Liu +5 more
semanticscholar +1 more source