Results 41 to 50 of about 7,496 (223)

Layered Nb-REE ores in the Tomtor Complex (Arctic Siberia): Formation conditions [PDF]

E3S Web of Conferences, 2019
We study a unique deposit of Nb-REE ores that occur as three orebodies overlying weathered rocks of the Tomtor ultramafic alkaline-carbonatite complex in the northern Sakha Republic (Yakutia).
Lazareva Elena, Zhmodik Sergey, Dobretsov Nikolay, Tolstov Alexander, Karmanov Nikolay, Dar’in Andrey, Kirichenko Ivan   +6 more
doaj   +1 more source

Late Precambrian U-Pb titanite age for peak regional metamorphism and deformation (Knoydartian orogeny) in the western Moine, Scotland [PDF]

, 2003
There has been controversy over the number and timing of orogenies in the Precambrian Moine block in the Scottish Caledonides since the earliest radiometric dating in the 1960s. This work challenges a recent hypothesis, that this sector of the Laurentian
Evans, J.A., Tanner, P.W.G.
core   +1 more source

Rare earth elements and yttrium minerals in altered granite-porphyry and hosting high-alumina schists in the Pellapahk Cu-Mo occurrence (Kolmozero-Voronya Belt)

Vestnik MGTU
Rare Earth Elements (REE) and yttrium phosphates monazite-(Ce) and xenotime-(Y), fluorine carbonates synchysite-(Ce) and parisite-(Ce), silicate allanite-(Ce) have been studied in the metamorphic rocks in the area of the Pellapahk Cu-Mo porphyry ...
Kalinin A. A., Khachatryan M. G., Savchenko Ye. E.   +2 more
doaj   +1 more source

CONCENTRIC-ZONAL AGGREGATE OF REE MINERALS IN FELDSPAR PEGMATITE OF THE VISHNEVYE MOUNTAINS, SOUTH URALS [PDF]

Минералогия, 2019
A concentric-zonal texture of mineral aggregate observed in alkali pegmatite of the Vishnevye Mountains was formed as a result of melt-fluid crystallization in a closed system.
V.A. Popov
doaj  

Monazite-(Ce)-huttonite solid solutions in granulite-facies metabasites from the Ivrea-Verbano Zone, Italy

Mineralogical Magazine, 1999
Abstract Composite populations of monazite-group minerals of both metamorphic and metasomatic origin have been discovered in thin layers of granulite-facies metabasites interlayered with metapelites, located in the Val Strona di Omegna region of the Ivrea-Verbano Zone, Italy.
Förster, H., Harlov, D.
openaire   +4 more sources

POTENSI ANCAMAN HILANGNYA KANDUNGAN MINERAL ALAMI (TENORM) DI WILAYAH PENGHASIL TAMBANG KABUPATEN BANGKA TENGAH

JTSL (Jurnal Tanah dan Sumberdaya Lahan)
The community in Central Bangka Regency carried out an increase in illegal mining in 2021, which could potentially threaten the loss of strategic natural resources.
Jhoni Hardiansyah, Isroil Samihardjo, Muhayatun Santoso   +2 more
doaj   +1 more source

Thermoluminescence characterization of natural and synthetic irradiated Ce-monazites

Journal of Rare Earths
The thermoluminescence (TL) emission of synthetic and natural Ce-monazites was characterized here to determine the potential application in the identification of microscopic defects from a qualitative point of view trying to link each TL peak to a chemical-physical process.
V. Correcher, C. Boronat, J. Garcia-Guinea, J.F. Benavente, T. Rivera-Montalvo   +4 more
openaire   +1 more source

First data on Th–REE mineralization in mafic-ultramafic igneous rocks of the western slope of the Southern Urals

Georesursy
The article presents the first data on rare earth mineralization in differentiated intrusions on the western slope of the Southern Urals. When studying the mineralogy of the rocks of the Shuida, Misaelga, Ishliy and Lysogorsk complexes, minerals of rare ...
S. G. Kovalev, S. S. Kovalev
doaj   +1 more source

Introduction to a Resources Special Issue on Criticality of the Rare Earth Elements: Current and Future Sources and Recycling

, 2018
The rare earth elements (REE) are vital to modern technologies and society and are amongst the most important of the critical elements. This special issue of Resources examines a number of facets of these critical elements, current and future sources of ...
Jowitt, Simon M.
core   +2 more sources

A novel method for the preparation of non-agglomerated nanometre sized particles of lanthanum phosphate phosphors utilising a high surface area support in the firing process [PDF]

, 2012
This journal is © The Royal Society of Chemistry 2012A convenient method is described that uses a quartz wool substrate to immobilise nanometre sized phosphor precursor particles enabling them to be fired at high temperature without sintering ...
Alireza Salimian, Brown, Bu, Buissette, Byrappa, Chai, Chawala, Feldmann, Fletcher, Flint, Fujishiro, Gedanken, George Robert Fern, Hasse, Heer, Ho, Hou, Jack Silver, Kang, Kijikowska, Lucas, Lucas, Rao, Rao, Revaux, Robert Withnall, Suslick, Suslick, Withnall, Yang, Yu, Yu, Zhang   +32 more
core   +1 more source