Results 41 to 50 of about 2,685 (149)

Carbonatites as rock fertilizers: a review [PDF]

, 2020
Rock fertilizers are geological resources used in agriculture for their nutrient content, but slow weathering rates hinder their effectiveness. Carbonatites are igneous rocks made mostly of carbonate minerals with a relatively high weathering rate and ...
Antunes, Pedro M., Jones, James MC, Guinel, Frédérique C.   +2 more
core   +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

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

Geochemistry of oceanic carbonatites compared with continental carbonatites: Mantle recycling of oceanic crustal carbonate

, 2001
Major and trace element and Sr–Nd–Pb–O–C isotopic compositions are presented for carbonatites from the Cape Verde (Brava, Fogo, Sáo Tiago, Maio and Sáo Vicente) and Canary (Fuerteventura) Islands.
Tilton, George, Le Bas, Mike J., Dieter Garbe-Schönberg, Hoernle, Kaj, Kaj Hoernle, Svend Duggen, Garbe-Schönberg, C.-Dieter, George Tilton, Duggen, Svend, Tilton, G., Le Bas, M., Mike J. Le Bas   +11 more
core   +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

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

The mineralogy, geochemistry, and petrogenesis of the grønnedal-íka alkaline igneous complex, south-west Greenland [PDF]

, 1989
At 1299±17 Ma (Blaxland et al, 1978), the Grønnedal-Íka is the oldest of the Gardar centres, situated in the extreme north-west of the province. Hare-earth clement (REE) trends suggest that the nepheline-syenites which make up the bulk of the complex ...
Bedford, Christopher M.
core  

Facial accessory of high-titanium magnezium-ferruginous micas as one of evaluation criteria of metamorphic and magmatic rocks rare-metall specialization

Литосфера, 2015
Type-chemical features of high-titanium magnezium-ferruginous micas of granulites, mafite-ultramafites, alkaline rocks, and carbonatites are considered.
A. I. Belkovsky
doaj   +2 more sources

Anatexis of meta-marls generates (silico-)carbonatites in orogenic settings

Communications Earth & Environment
The genesis of anatectic carbonatites – i.e., rocks crystallized from carbonate melts generated by partial melting of metasediments – remains unclear, though essential to elucidate their occurrence.
Chiara Groppo, Fabrizio Tursi, Maria Luce Frezzotti, Andrea Maroni, Sara Nerone, Franco Rolfo   +5 more
doaj   +1 more source

Genesis of the Bayan Obo Fe-REE deposit: evidence from Mg isotope and geochemistry of siderite carbonatites, Inner Mongolia, China

Frontiers in Earth Science
The Bayan Obo Fe-REE deposit, a world-renowned giant polymetallic ore concentration area, is located on the northern edge of the North China Craton, which borders on the Central Asian orogenic belt.
Chenghao Ren, Hongxiang Jia, Qunmao Zhou, Hongquan She, Jinwen Li, Baoliang Li   +5 more
doaj   +1 more source