Browsing ELibrary by Subject "RARE EARTHS"

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ANTHROPOGENIC ORIGIN OF POSITIVE GADOLINIUM ANOMALIES IN RIVER WATERS

Bau M.; Dulski P. (1996)

Positive Gd anomalies in shale-normalised rare earth element (REESN) patterns of natural waters may provide information on the types of ligands which control surface complexation of REE on particle surfaces. However, REESN ...
CONTRASTED MONAZITE HYDROTHERMAL ALTERATION MECHANISMS AND THEIR GEOCHEMICAL IMPLICATIONS

Poitrasson F.; Chenery S.R.; Bland D.J. (1996)

In spite of the major importance of monazite as a repository for the rare earths and Th in the continental crust, for U-Th-Pb geochronology, and as a possible form for high-level nuclear waste, very little work has been ...
GARNET FRACTIONATION IN A HYDROUS MAGMA OCEAN AND THE ORIGIN OF AL-DEPLETED KOMATIITES: MELTING EXPERIMENTS OF HYDROUS PYROLITE WITH REES AT HIGH PRESSURE

Inoue T.; Rapp R.P.; Zhang J.; Gasparik T.; Weidner D.J.; Irifune T. (2000)

Melting experiments of a representative mantle composition doped with some key trace elements were conducted under hydrous conditions at pressures to 20 GPa. The results demonstrate that only ~5-25% of garnet fractionation ...
GROWTH AND SPECTRAL PROPERTIES OF CRYSTAL ER3+:Y0.5GD0.5VO4

Huang X.; Lin S.; Sun X. (2005)

Er3+:Y0.5Gd0.5VO4 crystal with good optical quality was grown by Czochraski method. The structure of the crystal was determined by X-ray powder diffraction method. The segregation coefficient of Er3+ ions in the crystal ...
HEAVY REE ARE COMPATIBLE IN CLINOPYROXENE ON THE SPINEL LHERZOLITE SOLIDUS

Blundy J.D.; Robinson J.A.C.; Wood B.J. (1998)

Trace element partitioning between clinopyroxene and melt was investigated experimentally under conditions appropriate to near-solidus melting of spinel lherzolite in the upper mantle. Starting material was a high-Na, Al ...
RARE EARTH ELEMENT MOBILITY IN THE OCEANIC LOWER SHEETED DYKE COMPLEX: EVIDENCE FROM GEOCHEMICAL DATA AND LEACHING EXPERIMENTS

Bach W.; Irber W. (1998)

Hydrothermally altered rocks from the base metal depleted reaction zone in the lower sheeted dyke complex (ODP Hole 504B) show significant losses of rare earth elements (REE) in extensively altered domains (alteration ...
REE DIFFUSION IN CALCITE

Cherniak D.J. (1998)

Chemical diffusion of four rare-earth elements (La, Nd, Dy and Yb) has been measured in natural calcite under anhydrous conditions, using rare-earth carbonate powders as the source of diffusants. Experiments were run in ...
REE-BEARING SULFIDE IN BISHUNPUR (LL3.1), A HIGHLY UNEQUILIBRATED ORDINARY CHONDRITE

Kong P.; Deloule E.; Palme H. (2000)

This is a report of the first unambiguous discovery of rare earth elements (REE) in iron sulfide (FeS) in an ordinary chondrite. The content and the pattern of REE as well as the reduced state of the chondrules with the ...
STUDY ON ADSORPTION OF RARE EARTH ELEMENTS BY KAOLINITE

Wan Y.; Liu C. (2005)

For better understanding the adsorption of rare earth elements (REEs) by clay minerals and its controlling factors, the experiments on adsorption of REEs in solutions with 1 g·L-1 kaolinite were performed at different ...
ОСНОВНЫЕ ОСОБЕННОСТИ ДОКЕМБРИЙСКОЙ МЕТАЛЛОГЕНИИ УЛКАНСКОГО РАЙОНА

Гурьянов В.А.; Горошко М.В. (2005)

В статье дан обзор проявлений рудной минерализации Улканского прогиба, большая часть которых выявлена за последние 20 лет. Некоторые из них по прогнозным ресурсам отвечают крупным, средним и малым месторождениям. Показано, ...

Browsing ELibrary by Subject "RARE EARTHS"

Browsing ELibrary by Subject "RARE EARTHS"

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