Results 51 to 60 of about 7,282 (216)

Remote Sensing Exploration of Nb-Ta-LREE-Enriched Carbonatite (Epembe/Namibia)

Remote Sensing, 2016
On the example of the Epembe carbonatite-hosted Nb-Ta-LREE deposit, we demonstrate the use of hyperspectral reflectance data and geomorphic indicators for improving the accuracy of remote sensing exploration data of structurally-controlled critical raw ...
Robert Zimmermann, Melanie Brandmeier, Louis Andreani, Kombada Mhopjeni, Richard Gloaguen   +4 more
doaj   +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

The composition of apatite in the Archean Siilinjärvi glimmerite-carbonatite complex in eastern Finland [PDF]

Bulletin of the Geological Society of Finland
We present a geochemical dataset and cathodoluminescence images of apatite from the Neoarchean (2610 Ma) glimmerite-carbonatite rocks from the Siilinjärvi complex, Eastern Finland. The subhedral, tapered prismatic grains are compositionally fluorapatite,
Seppo Karvinen, Aku Heinonen, Christoph Beier, Niels Jöns   +3 more
doaj   +1 more source

MAGNETITE DEPOSITS OF THE TOMTOR (ONKUCHAKH AREA) AND KOVDOR PLUTONS: A PROBLEM OF ORE PRECARBONATITES [PDF]

Минералогия, 2018
The comparative characteristics of magnetite deposits of the Kovdor (camaphorite deposit) and Tomtor (Onkuchakh area) plutons, which were formed during the carbonatite stage of the formation of the plutons and can be classified «ore precarbonatites», is ...
A.V. Lapin, A.V. Tolstov, I.M. Kulikova, O.A. Nabelkin   +3 more
doaj  

Aillikites and Alkali Ultramafic Lamprophyres of the Beloziminsky Alkaline Ultrabasic-Carbonatite Massif: Possible Origin and Relations with Ore Deposits

Minerals, 2020
The 650–621 Ma plume which impinged beneath the Siberian craton during the breakup of Rodinia caused the formation of several alkaline carbonatite massifs in craton margins of the Angara rift system.
I. Ashchepkov, S. Zhmodik, D. Belyanin, O. Kiseleva, N. Medvedev, A. Travin, D. Yudin, N. Karmanov, H. Downes   +8 more
semanticscholar   +1 more source

Application of μ-XRF in Uranium Mineralogy of the Huanglongpu Carbonate-type Molybdenum Deposit, Shaanxi Province, China

Yankuang ceshi, 2022
BACKGROUND The carbonatite-type molybdenum metallogenic belt in East Qinling is the largest molybdenum metallogenic belt in the world. The Huanglongpu deposit is one of the earliest discovered carbonatite-type molybdenum deposits in China.
ZHANG Yi-yang, ZHONG Fu-jun, DU Jing-yong, YAN Jie, PAN Chun-rong, HUANG Hui, KANG Qing-qing, PAN Jia-yong   +7 more
doaj   +1 more source

The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry

, 2020
The Vuoriyarvi Devonian carbonatite–ijolite–pyroxenite–olivinite complex comprises several carbonatite fields: Neske Vara, Tukhta-Vara, and Petyayan-Vara. The most common carbonatites in the Tukhta-Vara and Neske-Vara fields are calciocarbonatites, which
E. Kozlov, E. Fomina, Mikhail Sidorov, V. Shilovskikh, V. Bocharov, A. Chernyavsky, M. Huber   +6 more
semanticscholar   +1 more source

Geochemical and spectroscopic investigation of apatite in the Siilinjärvi carbonatite complex: Keys to understanding apatite forming processes and assessing potential for rare earth elements

, 2020
The Siilinjarvi phosphate deposit (Finland) is hosted by an Archean carbonatite complex. The main body is composed of glimmerite, carbonatite and combinations thereof. It is surrounded by a well-developed fenitization zone.
S. Decrée, M. Savolainen, J. Mercadier, V. Debaille, S. Höhn, H. Frimmel, J. Baele   +6 more
semanticscholar   +1 more source

Electrical Conductivity of Hydrous Ultramafic Melts With Implications for Origin of Low Velocity Layer Atop of the 410 km Seismic Discontinuity

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Low‐velocity layers (LVLs) above the 410‐km discontinuity are commonly attributed to partial melt generated by dehydration melting when hydrous mantle transition‐zone material rises into the upper mantle, where water solubility in nominally anhydrous minerals decreases.
Takashi Yoshino, Longjian Xie
wiley   +1 more source

Geochemical and geophysical relationship of the potassium-rich fenite zone in surface and subsurface investigations of the giant Kuluncak (Malatya) Nb-U-REE-Zr-Li mineralization

Bulletin of the Mineral Research and Exploration
The Kuluncak (Malatya) district hosts one of the most significant Nb–U–REE–Zr–Li mineralizations in Türkiye, spatially associated with alkaline and carbonatite-related rocks.
Okan Pulat, Murat Kirtil, Mustafa Karakaş, Mustafa Küçük, Ahmet Mert Ulutaş, Murat Akgöz, Ali Tugcan Unluer, Mehmet Burak Omaç, Özkan Türkan, Hülya Ateş   +9 more
doaj   +1 more source