U–Pb ages and Sm–Nd signature of two subsurface granites from the Fort Simpson magnetic high, northwest Canada

1991 ◽  
Vol 28 (7) ◽  
pp. 1003-1008 ◽  
Author(s):  
M. E. Villeneuve ◽  
R. J. Thériault ◽  
G. M. Ross
Keyword(s):  
Rare Earth ◽  
Isotopic Composition ◽  
Rare Earth Element ◽  
Earth Element ◽  
The Other ◽  
Zircon Geochronology ◽  
Light Rare Earth ◽  
Great Bear Magmatic Zone ◽  
Drill Holes ◽  
Nd Isotopic Composition

Two undeformed biotite granites recovered from exploratory hydrocarbon drill holes that penetrated basement in the Fort Simpson magnetic high were analyzed for U–Pb zircon geochronology and Sm–Nd isotopic composition. Both samples give crystallization ages of 1845 Ma, with errors of less than 5 Ma. This age overlaps with the waning stages of magmatism in the Great Bear magmatic zone of Wopmay Orogen, 200 km to the east. One sample has an initial εNd of +1.3 and a TDM of 2.14 Ga, whereas the other yielded an initial εNd of −2.1 and a TDM of 2.45 Ga. The latter sample indicates that Early Proterozoic light rare-earth element enriched lithosphere with a crustal history dating back to at least 2.45 Ga is present in the subsurface west of Wopmay Orogen.

The effect of light rare earth element substitution in Yb14MnSb11on thermoelectric properties

2015 ◽  
Vol 3 (40) ◽  
pp. 10566-10573 ◽  
Author(s):  
Yufei Hu ◽  
Sabah K. Bux ◽  
Jason H. Grebenkemper ◽  
Susan M. Kauzlarich
Keyword(s):  
Rare Earth ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Rare Earth Element ◽  
Earth Element ◽  
Light Rare Earth Element ◽  
Light Rare Earth ◽  
Element Substitution ◽  
Effect Of Light

ThezTof Yb14MnSb11is improved by the introduction of a light rare earth element, RE3+(RE = Pr, Sm) with partially filled f-levels. The carrier concentration is reduced upon substituting RE3+for Yb2+, adding one electron to the system and improving thezTvalues 30–40% over that of the pristine material.

Micro-Structural Studies of Leached SON-68-Type Glasses

2001 ◽  
Author(s):  
N. Ollier ◽  
G. Panczer ◽  
B. Champagnon ◽  
P. Jollivet
Keyword(s):  
Rare Earth ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Rare Earth Element ◽  
Earth Element ◽  
The Other ◽  
Structural Studies ◽  
Microscopic Features ◽  
Precipitated Phases ◽  
Scanning Electron

Abstract Two types of borosilicate leached SON68-type glasses were studied, one doped with uranium and the other with rare-earth element (Nd, Eu). Photoluminescence and cathodoluminescence properties of U doped samples have been correlated to microscopic features of the corroded glass. Nuclear analysis, Electronic Microprobe and Scanning Electron Microscope investigations revealed the heterogeneous composition of the gels with differentiated phases. Enriched U phases (crystallised or not) and phosphorus precipitated phases in rare earth gel have been detected.

The interaction of nanostripes and the twin structure in light-rare-earth-element-based 123-type high-Tc superconductors

2011 ◽  
Vol 471 (3-4) ◽  
pp. 66-70 ◽  
Author(s):  
M.R. Koblischka ◽  
A. Koblischka-Veneva ◽  
M. Muralidhar ◽  
Th. Wolf ◽  
N. Hari Babu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Light Rare Earth Element ◽  
Light Rare Earth ◽  
High Tc Superconductors ◽  
Twin Structure ◽  
High Tc
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