Results 31 to 40 of about 5,424 (219)

Synthetic Carbonatite Magma [PDF]

Nature, 1959
Judging from the literature during the past decade, there is a growing interest in problems related to the genesis of carbonatites and associated alkaline igneous rocks. The interest has undoubtedly been fostered by the discovery of large reserves of rare earths in these rocks.
Wyllie, P. J., Tuttle, O. F.
openaire   +2 more sources

Evidence for dissolution-reprecipitation of apatite and preferential LREE mobility in carbonatite-derived late-stage hydrothermal processes [PDF]

, 2016
The Tundulu and Kangankunde carbonatite complexes in the Chilwa Alkaline Province, Malawi, contain late-stage, apatite-rich lithologies termed quartz-apatite rocks.
Appleton, J. Don, Broom-Fendley, Sam, Gunn, Gus, Styles, Mike T., Wall, Frances   +4 more
core   +1 more source

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

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

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

Structurally-controlled hydrothermal alteration in the syntectonic Neoproterozoic Upper Ruvubu Alkaline Plutonic Complex (Burundi): Implications for REE and HFSE mobilities [PDF]

, 2015
International audienceThe Neoproterozoic Upper Ruvubu Alkaline Plutonic Complex (URAPC), Burundi, is located along the western branch of the East African Rift.
Baele, Jean-Marc, Boulvais, Philippe, Cobert, Corentin, Decrée, Sophie, Demaiffe, Daniel, Gardien, Véronique, Midende, Gilbert, Nimpagaritse, Gérard, Tack, Luc   +8 more
core   +4 more sources

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

Subsolidus processes in the Longonjo and Bailundo carbonatites (Angola) [PDF]

, 2012
Peer ReviewedPostprint (published ...
Alfonso Abella, María Pura, Bambi, Aurora Cuaiela João Mateus, Castellano Calvo, Amaia, Gonçalves, Antonio Olimpio, Melgarejo Draper, Joan Carles   +4 more
core  

Carbonatite Melts and Electrical Conductivity in the Asthenosphere [PDF]

, 2008
International audienceElectrically conductive regions in Earth's mantle have been interpreted to reflect the presence of either silicate melt or water dissolved in olivine.
Gaillard, Fabrice, Iacono-Marziano, Giada, Malki, Mohammed, Pichavant, Michel, Scaillet, Bruno   +4 more
core   +2 more sources