Rare elements include rare-earth elements (REE), Nb, Ta, Zr, and Hf. As a group, these elements are concentrated in the crust and are incompatible (remain in the melt rather than substitute into silicate mineral
Chloride complexes are shown to dominate the aqueous Nd socciation at 300°C, and lead to solubilities that are (1) much higher than previously estimated and (2) much closer to the maximum concentrations that have been reported from active black smokers. However, the large fluxes of REEs in...
Microscopic evidence such as existence of the fabric similar to grumeuse fabric indicates a vital role for diagenetic processes and dynamic pressures in the evolution of the horizon. The distribution pattern of Rare Earth Elements (REEs) normalized to PAAS reveals weak fractionation of Light REEs ...
parts per million in the case of Ta to a few weight percent in the case of Zr, Nb, and REE (commonly reported as total rare-earth oxide, TREO). Thus, the enrichment factors fromprimitive man- tle to ore deposit range from$1000 for Zr to 50000 for Nb. All of the rare elements con...
This work briefly outlines modern ideas on geochemistry of rare earth elements (REE) in the ocean. Sources of REE and chemical properties of these elements, which govern their migration ability in natural processes, are considered. The REE behavior in the river water–seawater mixing zone is anal...
Noack1, Jinesh C Jain2, John Stegmeier1,3, J Alexandra Hakala4 and Athanasios K Karamalidis1* Abstract In this work, the geochemistry of the rare earth elements (REE) was studied in eleven outcrop samples and six, depth-interval samples of a core from the Marcellus ...
karst bauxite; rare earth elements; monazite; xenotime; geochemistry; mineralogy; Catalonia; Spain1. Introduction According to the International Union of Pure and Applied Chemistry (IUPAC) REE are a group of 17 elements with a similar geochemical behavior comprising the lanthanides, yttrium (Y) ...
rare earth element geochemistry presents the remarkable developments in the chemistry and geochemistry of the rare earth elements. this book discusses the analytical techniques and the recognition that rare earth fractionation occurs naturally in different ways. organized into 13 chapters, this volume ...
1. Geochemistry of Rare Earth Elements in Lamprophyres in Laowangzhai Gold Refilled, Young Province [J] . HUANG Zhi-long, XIAO Hua-yun, XU Cheng Journal of rare earths . 2000,第1期 机译:青年省老望寨金矿补充区煌斑岩中的稀土元素地球化学 2. Rare-Earth Elements and Genesis of Lamprophy...
Volume 21 of Reviews in Mineralogy treats a short course on the rare earth elements to about 80 participants in San Francisco, California, December 1-3, 1989, just prior to the fall meeting of the American Geophysical Union. Contents: Cosmochemistry of t