scholarly journals FORMS OF OCCURRENCE OF RARE EARTH ELEMENTS IN THE WEATHERING CRUST OF KUNDYBAY DEPOSIT (NORTH KAZAKHSTAN)

2011 ◽  
Author(s):  
Murat Omirserikov
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Weathering Crust

A new type of rare earth elements deposit in weathering crust of Permian basalt in western Guizhou, NW China

2008 ◽  
Vol 26 (5) ◽  
pp. 753-759 ◽  
Author(s):  
Ruidong YANG ◽  
Wei WANG ◽  
Xiaodong ZHANG ◽  
Ling LIU ◽  
Huairui WEI ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Weathering Crust ◽  
Nw China ◽  
New Type ◽  
Western Guizhou

scholarly journals Comportamento dos Elementos Terras Raras na Alteração Intempérica de Rochas Vulcânicas Ácidas no Sul do Brasil

1997 ◽  
Vol 24 (1-2) ◽  
pp. 59
Author(s):  
NELSON GASPARETTO ◽  
EGYDIO MENEGOTTO
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Volcanic Rocks ◽  
Weathering Crust ◽  
Acid Volcanic ◽  
The Absolute ◽  
Rock Minerals

This paper presents the result of a study of the behavior of Rare Earth Elements (REE) in the weathering of acid volcanic rocks (riolites) situated in the southern part of Brazil. Results show a clear loss of all REE in such conditions. The REE amounts decreases from the lower part to the top of the profile. The loss is progressive, increasing as the density become smaller. There are not differences in behavior between light and heavy REE. Little thickness of the weathering crust is the main responsible for the absence of the absolute accumulations in the lower part of the profile of the REE liberated by the rock-minerals decomposition and not fixed to new-formed minerals.

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth

ESTIMATION OF THE ABUNDANCE AND DISTRIBUTION OF RARE EARTH ELEMENTS IN SOIL AROUND KADUNA REFINING AND PETROCHEMICAL COMPANY USING NUCLEAR TECHNIQUE

2020 ◽  
Vol 4 (2) ◽  
pp. 599-604
Author(s):  
Michael A. Onoja ◽  
P. H. Bukar ◽  
C. U. Omeje ◽  
A. M. Adamu
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Nuclear Technique ◽  
Flood Plains ◽  
Economic Exploitation ◽  
Rare Elements ◽  
Petrochemical Company ◽  
The Moment ◽  
Abundance And Distribution ◽  
Natural Pattern

Instrumental neutron activation analysis (INAA) technique was used to investigate the abundance and distribution of rare earth elements (REE) in soil around Kaduna Refinery. The aim of the study is to assess the rare elements potential of Nigeria for economic exploitation. Five REEs (La, Dy, Eu, Yb, and Lu) were detected in varying concentrations ranging from a minimum of 0.6 µg/g (Lu) to a maximum of 249.0 µg/g (La). The elements existed with trends consistent with the natural pattern of REEs in soil, showing significant Eu and Dy anomalies which characterize upper plains and flood plains. The levels of REEs in soil in the study area were generally slightly above background levels, with minimal (La, Dy, and Eu), moderate (Yb), and significant (Lu) enrichments and trending: Lu ˃Yb ˃ Eu ˃ Dy ˃ La. The abundance of the REEs investigated cannot establish a potential of Nigeria for economic exploitation of the mineral, hence, rare earth project in the study area is not viable at the moment.

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