Browsing by Title
- DSpace Home
- →
- Browsing by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Title
Now showing items 12057-12076 of 39126
-
(1997)Rare earth and yttrium phosphate solubility products range over more than 1 order of magnitude. Minimum solubilities are observed for light rare earths between Ce and Sm. For the elements Ce, Pr, Nd, and Sm solubility ...
-
(2000)Crandallite group minerals from the Devonian bauxite deposit of Schugorsk, Timan, Russia, were studied by electron microprobe. Special attention was given to the distribution of the rare earth elements (REE). Of the A-site ...
-
(2002)Volume diffusion rates of Ce, Sm, Dy, and Yb have been measured in a natural pyrope-rich garnet single crystal (Py71Alm16Gr13) at a pressure of 2.8 GPa and temperatures of 1,200-1,450 °C. Pieces of a single gem-quality ...
-
(2000)Diffusion of rare earth elements (REEs) in natural and synthetic fluorapatite has been characterized under anhydrous conditions. Three types of experiments were run. In the first set of experiments, Sm was introduced into ...
-
(2001)Volume diffusion rates for five rare earth elements (La, Ce, Nd, Dy, and Yb) have been measured in single crystals of natural diopside at pressures of 0.1 MPa to 2.5 GPa and temperatures of 1,050 to1,450 °C. Polished, ...
-
(2004)Rare earth element (REE) contents of marine biogenic apatites have been shown to record seawater compositions. A data base of available and newly acquired rare earth element (REE) contents of marine biogenic apatites has ...
-
(1995)The Bosporus is the only source of seawater to the Black Sea and helps to maintain the basin-wide salinity gradient that caused the Black Sea to become the largest permanently anoxic basin in the world, some 3000 years ...
-
(2003)An ion probe study of rare earth element (REE) geochemistry of silicate inclusions in the Miles IIE iron meteorite was carried out. Individual mineral phases among inclusions have distinct REE patterns and abundances. Most ...
-
(2003)The rare earth element (REE) distribution in the Late Cenozoic volcanic series of the Lesser Caucasus is discussed. The origin of the Upper Miocene-Lower Pliocene andesite-dacite-rhyolite, Upper Pliocene-Lower Quaternary ...
-
(1994)Inversion of rare earth element (REE) abundances in MgO-rich (MgO ~6 wt.%) igneous rocks, described initially by McKenzie & ONions (1991), provides a useful means of constraining the distribution of melt fraction with ...
-
(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 ...
-
(2004)The development of soil conservation plans and evaluation of spatially distributed erosion models require knowledge of rates of soil loss and sedimentation on different landscape elements and slope positions. Characterization ...
-
(1998)Enstatite (En80Fs19Wo01) was synthesized from a hypersthene normative basaltic melt doped at the same time with La, Ce, Nd, Sm, Eu, Dy, Er, Yb, and Lu. The rare earth element concentrations were measured in both the basaltic ...
-
(2002)We present results of a secondary ion mass spectrometry study of the rare earth elements (REEs) in the minerals of two samples of lunar ferroan anorthosite, and the results are applicable to studies of REEs in all igneous ...
-
RARE EARTH ELEMENTS AS INDICATORS OF FORMATION CONDITIONS OF PALEOPROTEROZOIC METASEDIMENTARY ROCKS (2004)Ascertaining the formation conditions of Precambrian metasedimentary rocks is difficult, and geochemical methods are commonly used in this respect. The application of rare earth elements (REEs) is based on the concept of ...
-
(1988)The study of mantle xenoliths is the basis for identifying the mechanisms via which the earth has undergone irreversible differentiation. The Shavaryyn-Tsaram volcano (Mongolia), known for its abundance of large nodules ...
-
(1997)The partitioning of rare earth elements (REEs) between fluorapatite (FAp) and H2O- bearing phosphate-fluoride melts has been studied at about 700 and 800°C and 0.10-0.15 GPa. REE uptake patterns, i.e., plots of D(REE:FAp/melt), ...
-
(1995)Standard partial molal thermodynamic properties including association constants for 246 inorganic aqueous rare earth element (REE) complexes with chloride, fluoride, hydroxide, carbonate, sulfate, bicarbonate, nitrate, and ...
-
(2004)REE distribution was studied in rocks, ores, and minerals from uranium deposits of Northern Kazakhstan. In terms of the style of premineral metasomatic alteration, mineralogic composition, and order of mineral formation, ...
-
RARE EARTH ELEMENTS IN QUARTZ-MUSCOVITE METASOMATITES OF THE PRIMORSKII FAULT, WESTERN BAIKAL AREA (2003)The behavior of rare earth elements and yttrium was studied in the metamorphic rocks of the Sarma Group (PR1) and in the later quartz-muscovite metasomatites confined to the Primorskii fault zone in the western Baikal area. ...
Now showing items 12057-12076 of 39126