Rare Earth Elements In Apatite From Basalt
Possibility of Mixed Origin of Rare Earth Elements in ...
It is well known that the rare earth elements (REEs) incorporated in the crystal lattice of sedimentary apatite are commonly derived from ambient seawater. This study documents, for the first time, the possibility of mixed origin of apatite REEs present in the Egyptian Western Desert phosphorites, known as the AbuTartur phosphorites, one of the most important accumulations of sedimentary ...
Rare earth elements leaching from Chadormalu apatite ...
Key words: Leaching, Apatite, Rare Earth Elements, Regression INTRODUCTION Rare earth elements (REEs) are a group of elements with atomic numbers 57 through 71. Yttrium with atomic number 39 is included with the rare earth elements because it often occurs with them in nature and has similar chemical properties [1]. The most common rare earth elements containing minerals are .
The Cl isotope composition and halogen contents of Apollo ...
· 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).
Rare earth element release from phosphate minerals in the ...
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 ...
Rare earth elements in apatite as a monitor of magmatic ...
T1 Rare earth elements in apatite as a monitor of magmatic and metasomatic processes. T2 The Ilímaussaq complex, South Greenland. AU Zirner, Aurelia L K. AU Marks, Michael A W. AU Wenzel, Thomas. AU Jacob, Dorrit E. AU Markl, Gregor. PY 2015/7/1. Y1 2015/7/1. N2 Textural and compositional variations of apatite from the plutonic Ilímaussaq complex in South Greenland and ...
Major, trace and rare earth elements of apatite and zircon ...
· LAICPMS analysis for trace and rare earth elements of apatite. 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 ...
A dry lunar mantle reservoir for young mare basalts of ...
46 812, apatite in mare basalts and highlands samples1320, pyroclastic glass beads21, 22, ... 58 (K), rare earth elements (REE) and phosphorus (P) (KREEP)rich components, and spallation11, 59 15, 25, 2729. It is thus crucial to combine in situ analysis of water abundances and hydrogen isotope 60 composition with detailed contextual petrographic information. 61 62 The Chang'E5 (CE5 ...
Rareearth element geochemistry of the islandarc volcanic ...
Rareearth elements have been determined by massspectrometric isotope dilution in 16 samples. Chondritenormalized rareearth element patterns are distinct for each volcanic center, but all are relatively flat (Ce/ = to ). Within each center, rareearth element concentrations increase from basalt to dacite, and Eu anomalies become progressively more negative from basalt to dacite ...
A fast method for apatite selective leaching from granitic ...
· Rare earth elements (REE) and phosphorus (P) in apatite were determined using inductively coupled plasma optical emission spectrometry (ICPOES) after partial dissolution of the granitic rocks and pure apatite. The dissolution was performed with nitric acid in an open system and the matrix elements were separated by a ion exchange procedure. Samples of pure apatite from .
Trace Element Variations in Deccan Basalts: Roles of ...
Variations in Zr, rare earth elements and Rb/Nb indie fractional crystallization and significant coupled crustal assimilation away from the Deccan plume center . The Zr variation near the plume center can be explained through only fractional crystallization without the involvement of crust. AFC modelling of available SrNd isotope data requires very high and unreasonable amounts of crustal ...
![[PDF] Rare earth element abundances in apatite in the ...](/grz2kxi/914.jpg)
![[PDF] Rare earth element abundances in apatite in the ...](/grz2kxi/660.jpg)
[PDF] Rare earth element abundances in apatite in the ...
The concentrations of the rare earth elements (REEs) in apatite from a 600mthick sequence toward the top of the Bushveld Complex, South Africa, have previously been published; they show two ranges . Expand. 26. PDF. Save. Alert. Research Feed. Apatite/liquid partition coefficients for the rare earth elements and strontium. E. Watson, T. Green; Geology; 1981; Abstract Sixteen sets of ...
The Principal Types of Rare Earth Elements Deposits
Average grade of ~8 % apatite ~726,000 metric tons of apatite in tailings Apatites average % REE oxide ~80,700 metric tons of REE oxide Mineville iron mining district, northeast New York, active 1804 1971 USGS Bulletin 1046–B. Ilmenite Fe2+TiO 3 Monazite (REE,Th)PO 4 Zircon ZrSiO 4 Rutile TiO 2 Most abundant heavy mineral Trace to minor amounts of heavy mineral suite 3rd most 2nd ...
(PDF) A study of rare earth element (REE)SiO2 variations ...
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 ...
This report and its contents are copyright and may not be ...
Rare earth elements are used in hundreds of unique enduses and appliions that collectively fall into one of eight enduse egories: 1.) Battery Alloys, 2.) Catalysts, 3.) Ceramics, Pigments and Glazes, 4.) Glass Polishing Powders and Additives, 5.) Metallurgy and Alloys, 6.) Permanent Magnets, 7.) Phosphors, and 8.) Other EndUses and Appliions (see Figure 2). Figure 2: Rare earth ...
REVISION 1 Dpoor Hydrogen in Lunar Mare Basalts ...
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 ...
The effect of fluorine and chlorine on trace element ...
Arc basalts display distinctive trace element signatures that include marked enrichment of Pb, large ion lithophile elements (LILE) and light rare earth elements (LREE) relative to high field strength elements (HFSE) and heavy rare earth elements (HREE). Many of these elements are not significantly fractionated from each other during mantle melting and subsequent differentiation. Therefore ...
