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Apatite subspecies depend on their halogen and hydroxyl content; chlorapatite, hydroxylapatite and fluorapatite, with additional substitution of other elements within the lattice such as rare earth elements (REE), sodium, strontium and manganese also possible. Rare earth elements are vital to green and emerging technologies, with demand set to outstrip supply. Apatite provides a possible ...
Apatite grains in lunar mare basalts contain hydrogen that ranges in D/H ratio by more than a factor of two. For most of these basalts, the D/H ratios in their apatite grains decrease with measures of the host basalts' time spent at elevated temperature, specifically the FeMg homogenization of their pyroxenes. Most basalts with homogeneous pyroxenes (, with constant Fe/Mg ratio) have ...
• Apatite Ca. 5 (PO. 4) 3. Bastnaesite, Mountain Pass, CA. Photo credit Rob Lavinsky, Monazite, Madagascar. Photo source Xenotime crystals from a pegmatite vein in granite, NY. Source credit John H Betts. REEenriched Apatite from . Kona Peninsula, Russia. Source credit John H Betts. Rare earth elements do not fit into most mineral structures and can only be found in ...
Rareearth Elements in Apatite from Layered Norites and IronTitanium Oxide Orebodies Related to Anorthosites (Rogaland, Norway) IWAN ROELANDTS and JEANCLAIR DUCHESNE GéologiePétrologieGéochimie, Université de Liège, Sart Tilman, Belgium Abstract Rareearth elements (REE) were investigated by neutronactivation analysis in nine apatites and seven coexisting plagioclase .
· Typically, the highest δ 37 Cl values in lunar apatite are observed within lithologies such as the Mgsuite, potassium/rareearth elements/phosphorus (KREEP)rich basalts and impact lithologies, which have largely been explained in terms of a primeval KREEP (urKREEP) component [residual melt of lunar magma ocean ] with a characteristically high δ 37 Cl value (2, 3).
· The trace and rare earth element concentrations of apatite were measured in the same lab as UPb zircon dating but using a 193 nm Excimer ArF laser ablation system. The standards used include NIST SRM 612 (to correct for signal drift) and the international basalt glass standards NIST BCR2G, BHVO2G and BIR1G (as external standards). Ca content in apatite measured by electron .
Mobility of Rare Earth Elements in BasaltDerived Laterite at the Bolaven Plateau, Southern Laos Kenzo Sanematsu,1 Takeru Moriyama,1* Laochou Sotouky2 and Yasushi Watanabe1 1Institute for GeoResources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan and 2Department of Geology, Ministry of Energy and Mines, Lao Abstract .
Apatite Dissolution Monazite Organic acids Rare earth elements Yttrium The primary objective of this research was to investigate the effects of aliphatic and aromatic low molecular weight organic acids (LMWOAs) on rare earth element and yttrium (REY) release from the phosphate minerals apatite and monazite. Since prior studies have shown that redox status can affect REY partitioning during ...
A study of rare earth element (REE)SiO2 variations in felsic liquids generated by basalt fractionation and amphibolite melting: A potential test for discriminating between the two different ...
· Mobility of Rare Earth Elements in BasaltDerived Laterite at the Bolaven Plateau, Southern Laos. Kenzo SANEMATSU, Corresponding Author. Institute for GeoResources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan. K. SANEMATSU, Institute for GeoResources and Environment, National Institute of Advanced .
· The concentrations of all rare earth elements (REE: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) in silie glass, apatite and zircon were measured by an ion microprobe method with a high mass resolving power of 9300 at 1% peak height.
Lecture 16 Rare Earth Elements and Spider Diagrams Monday, March 21st, 2005 The Rare Earth Elements (REE) 2 Contrasts and similarities in the D values: All are incompatible Table 91. Partition Coefficients for some commonly used trace elements in basaltic and andesitic rocks Olivine Opx Cpx Garnet Plag Amph Rb Sr Ba .
The chondritenormalized rare earth abundances of separated apatite, clinopyroxene, amphiboles and micas are high, with La in apatite being up to 4600 times chondrite. Apatites show a significant variation in rare earth content and in La:Lu ratios, indiing the occurrence of some crystal fractionation. The absence of europium anomalies from all mineral phases is indiive of a relatively ...
· We identify natural carbonated silie melts, which are enriched in light rare earth elements and depleted in Nb and Ta, and show that they were continuously transformed to .
Diffusion under irradiation of rare earth elements in apatite. P. Martina, A. Chevarier. a, G. Panczer. b '1',oN . I . a . Institut de Physique Nuc1eaire de Lyon, UMR 5822, IN2P3CNRS,Universite Claude,.....:;0. Bernard Lyon 1, 43 Bd du 11 novembre 1918, F69622,Villeurbanne Cedex, France . b . Laboratoire Physicochimie des materiaux luminescents, UMR 5620 CNRS, Universite Claude ...
Request PDF | Apatite Concentrate, A Potential New Source of Rare Earth Elements | Introduction Experimental Results and Discussion Conclusions Future Work Acknowledgments | Find, read and cite ...
Rare earth elements (REE) are a group of 17 elements including lanthanides, yttrium and scandium; which are found in a variety of classes of minerals worldwide. The criticality of the appliion, lack of high grade and economically feasible REE resources and a monopolistic supply situation has raised significant attention in recovery of these metals from low grade ores and waste materials. In ...
rare earth element (MREE)enriched pattern with a weak negative Eu anomaly. Such grains contain abundant inclusions of florencite and sericite. Within highgrade bornite ores from the deposit, apatite displays an extremely highly MREEenriched chondritenormalized fractionation trend with a positive Eu anomaly. Concentrations of U and Th in apatite mimic the behaviour of ∑REY and are richest ...
Extraction of rare earth elements from hydratephosphate precipitates of apatite processing View the table of contents for this issue, or go to the journal homepage for more Home Search Collections Journals About Contact us My IOPscience View metadata, citation and similar papers at brought to you by CORE provided by Tomsk State University Repository. Extraction of rare earth ...
potassium/rareearth elements/phosphorus (KREEP)rich basalts and impact lithologies (10), which have largely been explained in terms of a primeval KREEP (urKREEP) component [residual melt of lunar magma ocean (23)] with a characteristically high δ37Cl value (2, 3). This conclusion was initially supported by trends in bulkrock rareearth element (REE) content and average apatite δ37Cl ...
