Results 51 to 60 of about 496 (100)

Radiophiles des villes et des champs

open access: yes, 2000
Née d'un projet fédérateur de l'espace régional et national, sensible à gommer ce qui était vécu comme une rupture entre le monde des villes et le monde des champs, la radio s'est surtout développée dans le cadre urbain.
Méadel, Cécile
core   +1 more source

Common problems - and progress towards solutions - in the process mineralogy of rare earths [PDF]

open access: yes, 2018
This is the author accepted manuscript. The final version is available from the publisher via the link in this recordThe geochemistry and mineralogy of rare earth element (REE) deposits is diverse and ranges from carbonatite-related deposits and alkaline
Wall, F
core  

Towards a European sustainable beneficiation of rare earth elements bearing minerals:a review [PDF]

open access: yes
This review explores the multifaceted aspects of sustainable extraction of rare earth elements (REEs) bearing minerals within Europe, stressing the exploitation of local deposits, that together with the integration of cleaner and greener approaches ...
Aaen, Sara Bjørn   +11 more
core   +2 more sources

Mechanisms for the generation of HREE mineralization in carbonatites: Evidence from Huanglongpu, China. [PDF]

open access: yes, 2019
The Hunaglongpu carbonatites, Qinling Mountains, China, are exceptional as they form both an economic Mo resource, and are enriched in the HREE compared to typical carbonatites, giving a metal profile that may closely match projected future demand.
Cangelosi, D   +4 more
core  

Mineralogy and Beneficiation of Lamujärvi Syenites [PDF]

open access: yes, 2020
The Lamujärvi syenites intrusions occur within Svecofennian (ca. 1.92 Ga) gneisses, ca. 70 km west of the Otanmaki alkaline area in central Finland. Previous studies have revealed zones in the syenites that display strong enrichment in Zr (1587 ppm), Nb (
A Torppa, J Laukkanen, N Heino, X S Yang
core  

An evaporitic origin of the parent brines of Colombian emeralds : fluid inclusion and sulphur isotope evidence [PDF]

open access: yes, 1995
Arboleda, C.   +5 more
core   +1 more source

Using Unmanned Aircraft System (UAS)-borne high-resolution hyperspectral imaging and gamma radiometry for rare earth element exploration in the Bearpaw Mountains, Montana USA [PDF]

open access: yes
The radiometric signature of thorium, in combination with the hyperspectral signature of carbonate minerals, can be a useful indicator of rare earth mineral occurrences in air-borne geophysical exploration.
Kamp, Emma
core   +1 more source

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