Long-term Investigation of Sr- Isotope and Rare Earth Element Fractionation Processes Within Three Major Aquifers in the Äspö Hard Rock Laboratory (Sweden)

2015 ◽  
Vol 32 (3-4) ◽  
pp. 243-254 ◽  
Author(s):  
Manussawee Hengsuwan ◽  
Christine Heim ◽  
Klaus Simon ◽  
Bent T. Hansen
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Hard Rock ◽  
Sr Isotope ◽  
Rock Laboratory ◽  
Element Fractionation

scholarly journals The long-term variations of rare earth element contents in Tamagawa hot spring waters, Akita Prefecture, Japan.

2002 ◽  
Vol 63 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Tetsuya SANADA ◽  
Nobuki TAKAMATSU ◽  
Yuzo YOSHIIKE ◽  
Masayuki IMAHASHI ◽  
Hideo HIGUCHI
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Hot Spring ◽  
Akita Prefecture ◽  
Element Contents ◽  
Long Term Variations

Unusual rare earth element fractionation in a tin-bearing magmatic-hydrothermal system

Geology ◽  
2011 ◽  
Vol 39 (4) ◽  
pp. 295-298 ◽  
Author(s):  
Thomas Monecke ◽  
Ulf Kempe ◽  
Michael Trinkler ◽  
Rainer Thomas ◽  
Peter Dulski ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Hydrothermal System ◽  
Earth Element ◽  
Element Fractionation

Geochemical evolution in the Blake River Group, Abitibi Greenstone Belt, Superior Province

1980 ◽  
Vol 17 (9) ◽  
pp. 1292-1299 ◽  
Author(s):  
I. E. M. Smith
Keyword(s):  
Rare Earth ◽  
Volcanic Rock ◽  
Rare Earth Element ◽  
Greenstone Belt ◽  
Earth Element ◽  
Superior Province ◽  
Calc Alkaline ◽  
Abitibi Greenstone Belt ◽  
Rock Types ◽  
Element Fractionation

In well exposed, well developed greenstone belts of the Superior Province there is a clear progression from stratigraphically lower, geochemically primitive volcanic rock types (komatiites, tholeiites) to overlying geochemically evolved calc-alkaline volcanic rock types. In the western Blake River Group of the Abitibi Greenstone Belt the change from tholeiitic to calc-alkaline volcanics represents a geochemical discontinuity defined by an increase in incompatible elements and light/heavy rare-earth element fractionation in the overlying rocks. Quantitative modelling of the parameters of the discontinuity indicates that it can be explained by a change to very small amounts of melting of unmodified mantle lherzolite, although this is not a unique solution. In calc-alkaline suites showing high degrees of rare-earth element fractionation the calculated melt fraction required of unmodified mantle becomes unrealistically low and models involving a geochemically evolved source may have to be considered.

The Effects of Rare Earth Element on the Al-Ti-B Master Alloy Second Phase

2014 ◽  
Vol 574 ◽  
pp. 380-385
Author(s):  
Hua Hu ◽  
Zhi Liu Hu ◽  
Liang Jie Wei ◽  
Jian Bao Yin
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Master Alloy ◽  
Mass Fraction ◽  
Earth Element ◽  
Intermediate Phase ◽  
Second Phase ◽  
Second Phase Particles ◽  
Master Alloys

Al-Ti-B-RE master alloy is an efficient long-term new refiner. Al-Ti-B-RE refiner was prepared by Al-Ti-B master alloy doped with LaF3, La-rich RE carbonate and Ce respectively. This paper studies the effect of different type and mass fraction of RE on the Second Phase Particles distributions and shape in Master Alloys. The addition of RE have a certain effect of refining TiAl3 and TiB2 intermediate phase. Moreover, it prevents aggregation of TiB2 intermediate phase. As the different type and addition of RE has an effect on the microstructure of master alloy, then the reasonable addition of RE is put forward.

scholarly journals Microprobe analyses of rare earth element fractionation in meteoritic minerals

1984 ◽  
Vol 3 (1-3) ◽  
pp. 677-680 ◽  
Author(s):  
T.M. Benjamin ◽  
C.J. Duffy ◽  
C.J. Maggiore ◽  
P.S.Z. Rogers ◽  
D.S. Woolum ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Element Fractionation

MORB alteration: Rare-earth element/non-rare-earth hygromagmaphile element fractionation

1990 ◽  
Vol 82 ◽  
pp. 1-14 ◽  
Author(s):  
P. Bienvenu ◽  
H. Bougault ◽  
J.L. Joron ◽  
M. Treuil ◽  
L. Dmitriev
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Element Fractionation
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