Results 31 to 40 of about 382 (174)

Ore specialization of carbonatite complexes at the Urais and Timan

Литосфера, 2017
The ore specialization of carbonatite complexes of Urals-Timan region has been established: niobium and rare earth-niobium - for the Urals’ carbonatite complexes, the rare-earth - for carbonatites of Timan.
I. L. Nedosekova, D. A. Zamyatin, O. V. Udoratina   +2 more
doaj   +2 more sources

Spatial and temporal distribution, geochemical characteristics of carbonatites and their relationship with U–REE mineralization in the Xiaoqinling area, Shaanxi Province

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, CHEN Zhengle, PAN Jiayong, LI Peng, LIU Yulong, LI Lei, JIANG Hongjun, GAO Cheng   +7 more
doaj   +1 more source

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

Genesis of apocarbonatitic titanium metasomatites of the Petyayan-vara rare-earth occurrence (Vuoriyarvi, the Kola Region)

Vestnik MGTU, 2018
The objects of the study are apocarbonatitic titanium metasomatites ("titanium carbonatites") associated with the rare earth carbonatites of the Petyayan-Vara area of the Vuoriyarvi complex (the Kola region).
Kozlov E. N. , Fomina E. N. , Sidorov M. Yu. , Kirkin V. V.   +3 more
doaj   +1 more source

RELATION BETWEEN δ¹³С, δ¹⁸О AND REE CONTENT IN CARBONATITES OF THE TOMTOR COMPLEX, SAKHA REPUBLIC (YAKUTIA)

Геодинамика и тектонофизика
The paper reports the comprehensive study of phosphorus-rare metal (polymineral) carbonatites (I) and rare metal (ankerite) carbonatites (II) of the Tomtor massif based on ICP-MS, XRF, XRF-SI, SEM methods and isotope determination of C, O and 86Sr/87Sr ...
V. A. Ponomarchuk, E. V. Lazareva, S. M. Zhmodik, A. V. Travin, A. V. Tolstov   +4 more
doaj   +1 more source

Does a carbonatite deposit influence its surrounding ecosystem?

FACETS, 2019
Carbonatites are unusual alkaline rocks with diverse compositions. Although previous work has characterized the effects these rocks have on soils and plants, little is known about their impacts on local ecosystems.
James M.C. Jones, Elizabeth A. Webb, Michael D.J. Lynch, Trevor C. Charles, Pedro M. Antunes, Frédérique C. Guinel   +5 more
doaj   +1 more source

Insight into differentiation in alkalic systems: Nephelinite-carbonate-water experiments aimed at Ol Doinyo Lengai carbonatite genesis

Frontiers in Earth Science, 2022
Ol Doinyo Lengai (ODL, Tanzania, East African Rift) is the only known volcano currently erupting carbonatite on Earth with 30 yr. cycles alternating between quiescent carbonatite effusion and explosive, compositionally-zoned silicate eruptions.
Craig C. Lundstrom, Rick Hervig, Tobias P. Fischer, Mayandi Sivaguru, Leilei Yin, Zhenhao Zhou, Xiaobao Lin, Rodrigo Grossi-Diniz   +7 more
doaj   +1 more source

On the age of pyrochlore carbonatites from the Ilmeno-Vishnevogorsky Alkaline Complex, the Southern Urals (insights from Rb-Sr and Sm-Nd isotopic data)

Литосфера, 2020
Research subject. In this research, we carried out Sm-Nd- и Rb-Sr-dating of pyrochlore carbonatite from the Vishnevogorsky niobium deposit, Ilmeno-Vishnevogorsky Alkaline Complex, Southern Urals.
I. L. Nedosekova, V. A. Koroteev, T. B. Bayanova, P. A. Serov, V. I. Popova, M. V. Chervyakovskaya   +5 more
doaj   +1 more source

Stable (C, O, S) isotopes and whole-rock geochemistry of carbonatites from Alto Paranaíba Igneous Province, SE Brazil

Brazilian Journal of Geology
: The present work investigates the relationship between whole-rock geochemistry and stable isotope composition from carbonatites belonging to the Tapira, Araxá, Salitre, Serra Negra, Catalão I, and Catalão II alkaline-carbonatite complexes of the Alto ...
Caroline Siqueira Gomide, José Affonso Brod, Lucieth Cruz Vieira, Tereza Cristina Junqueira-Brod, Ivan Alejandro Petrinovic, Roberto Ventura Santos, Elisa Soares Rocha Barbosa, Luis Henrique Mancini   +7 more
doaj   +1 more source

Rare Earth Elements (REE) Deposits Associated with Great Plain Margin Deposits (Alkaline-Related), Southwestern United States and Eastern Mexico

Resources, 2018
W.G. Lindgren in 1933 first noted that a belt of alkaline-igneous rocks extends along the eastern edge of the Rocky Mountains and Basin and Range provinces from Alaska and British Columbia southward into New Mexico, Trans-Pecos Texas, and eastern Mexico ...
Virginia T. McLemore
doaj   +1 more source