Results 1 to 10 of about 54,225 (159)

Rare earth element and yttrium geochemistry applied to the genetic study of cryolite ore at the Pitinga Mine (Amazon, Brazil)

Anais da Academia Brasileira de Ciências, 2008
This work aims at the geochemical study of Pitinga cryolite mineralization through REE and Y analyses in disseminated and massive cryolite ore deposits, as well as in fluorite occurrences.
Orlando R.R. Minuzzi, Artur C. Bastos Neto, Milton L.L. Formoso, Sandra Andrade, Valcir A. Janasi, Juan A. Flores   +5 more
doaj   +1 more source

Fractionation of Rare Earth Elements in Greisen and Hydrothermal Veins Related to A-Type Magmatism

Geofluids, 2019
This study focuses on concentrations and fractionation of rare earth elements (REE) in a variety of minerals and bulk materials of hydrothermal greisen and vein mineralization in Paleoproterozoic monzodiorite to granodiorite related to the intrusion of ...
Mikael Tillberg, Olga M. Maskenskaya, Henrik Drake, Johan K. Hogmalm, Curt Broman, Anthony E. Fallick, Mats E. Åström   +6 more
doaj   +1 more source

MINERALOGICAL FEATURES AND PHYSICOCHEMICAL FORMATION CONDITIONS OF VEIN MINERALIZATION OF THE SOUTHERN FLANK OF THE SAF´YANOVKA MASSIVE SULFIDE DEPOSIT (CENTRAL URALS) [PDF]

Минералогия
The paper presents the results of studies of sulfide and fluorite veins of the southern flank of the Saf´yanovka massive sulfide deposit, Central Urals.
N.P. Safina, A.V. Korovko, I.A. Blinov, N.N. Ankusheva, M.A. Rassomakhin, K.A. Filippova   +5 more
doaj   +1 more source

MINERALOGICAL, GEOCHEMICAL AND RADIOACTIVE ASPECTS OF NUWEIBI BASEMENT ROCKS, CENTRAL EASTERN DESERT, EGYPT [PDF]

Delta Journal of Science, 2010
Nuweibi area is situated in the Central Eastern Desert, Egypt, covers an area of about 135km2. The field observations and the detailed petrographic study revealed that the mapped area is distinguished into several rock units: serpentinites, metasediments,
Sameh M. Mansour, Mohamed A. Wetait, Salah S. El-Balakssy   +2 more
doaj   +1 more source

REY and Trace Element Chemistry of Fluorite from Post-Variscan Hydrothermal Veins in Paleozoic Units of the North German Basin

Geosciences, 2018
Hydrothermal fluorites from Paleozoic sedimentary rocks and volcanic units in the North German Basin (NGB) have been investigated to create a petrographic and geochemical inventory—with particular focus on strategic elements such as rare earth ...
Patrick Nadoll, Meike Rehm, Florian Duschl, Reiner Klemd, Dennis Kraemer, Marta Sośnicka   +5 more
doaj   +1 more source

Relationship of F-Be mineralization to granites and syenites at the Ermakovka deposit (Western Transbaikalia)

Geologica Acta, 2020
The paper presents the mineralogical and geochemical characteristics of two groups of hydrothermal rocks and their relation with subalkaline granites of the Ermakovskoe deposit.
G.S. Ripp, I.A. Izbrodin, M.O. Rampilov, A.A. Tomilenko, E.A. Lastochkin, V.F. Posokhov   +5 more
doaj   +3 more sources

RADIOACTIVITY AND MINERALOGICAL INVESTIGATIONS ON YOUNGER GRANITES OF GABAL SHEIKH EL-ARAB AREA, SOUTHERN SINAI, EGYPT [PDF]

Delta Journal of Science, 2006
The younger granites of the studied area vary in composition from monzogranite, syenogranite to alkali feldspar granite. They exhibit silicification, kaolinitization and ferrugination as a result of the post-magmatic hydrothermal alteration.
ABDEL MONEM M. OSMAN, IBRAHIM E. AASSY, AND OSAMA R. SALLAM, ALI A. EL MOWAFY, SALAH S. EL BALAKSSY   +4 more
doaj   +1 more source

Geology and mineralization of the Bayan Obo supergiant carbonatite-type REE-Nb-Fe deposit in Inner Mongolia, China: A review

China Geology, 2023
The Bayan Obo supergiant carbonatite-related rare-earth-element-niobium-iron (REE-Nb-Fe) endogenetic deposit (thereafter as the Bayan Obo deposit), located at 150 km north of Baotou City in the Inner Mongolia Autonomous Region, is the largest rare-earth ...
Yi-ke Li, Chang-hui Ke, Hong-quan She, Deng-hong Wang, Cheng Xu, An-jian Wang, Rui-ping Li, Zi-dong Peng, Ze-ying Zhu, Kui-feng Yang, Wei Chen, Jian-wei Zi, Wen-lei Song, Yong-gang Zhao, Li Zhang, Hong Yu, Bin Guo, Sheng-quan Zhou, Xing-yu Yuan, Jing-yao Liu   +19 more
doaj   +1 more source

Distribution of rare earth elements in Ruska Poliana granites and accessory fluorites

Мінеральні ресурси України, 2019
Fluorite is one of the main concentrators of rare earth elements (REE) in the granites of the Ruska Polіana massif of the Korsun-Novomyrhorod pluton of the Ukrainian Shield. Despite its distribution in the granites of the massif, the geochemical features
O. M. Ponomarenko, O. V. Zaiats, A. I. Samchuk, I. A. Shvaika, L. I. Proskurka   +4 more
doaj   +1 more source

REE+Y behavior in fluoride-chloride-sulphide-sulphate-carbonate environment at hydrothermal stages of alkaline magmatic complexes according to thermodynamic modeling

Известия Томского политехнического университета: Инжиниринг георесурсов, 2018
The relevance of the work is caused by appearance of thermodynamic data on heavy REE phosphates, bastnesite and parizite, as well as experimental data on stability of lanthanides sulfate complexes and yttrium fluorine complexes in solutions.
Galina Petrovna Shironosova, Ilya Romanovich Prokopyev   +1 more
doaj   +2 more sources