Journal ArticleDOI
Rare-earth abundances in chondritic meteorites
TLDR
In this article, 15 chondrites, including eight carbonaceous chondites, were analyzed for rare earth element abundances by isotope dilution, and the persistence of anomalies in chondritic materials relatively removed from direct condensational processes implies that anomalous components were introduced at a late stage of chondrite formation.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1978-08-01. It has received 1346 citations till now. The article focuses on the topics: Chondrule & Chondrite.read more
Citations
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Experimental studies of condensation processes of silicate materials at low pressures and high temperatures, I. Phase equilibria in the system CaMgSi2O6H2 in the temperature range 1200–1500°C and the pressure range (PH2) 10−6 to 10−9 bar
TL;DR: In this paper, phase equilibria in the system CaMgSi2O6H2 in the pressure and temperature ranges 10−9 to 10−6 bar and 1200-1500°C, respectively, have been experimentally determined.
Journal ArticleDOI
Rare earth and other elements in components of the abee enstatite chondrite
TL;DR: In this paper, the authors conducted radiochemical and instrumental neutron activation analyses of REEs and other elements for Abee clast samples, a matrix sample, a dark inclusion, magnetic and nonmagnetic samples, and bulk samples.
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Sienogranitos leucocráticos do Domínio Macururé, Sistema Orogênico Sergipano, Nordeste do Brasil: Stock Glória Sul
TL;DR: O Stock Gloria Sul (SGS) as discussed by the authors is a granitogenese no Dominio Macurure (DM) e complexa e ocorrem bem distribuidos nesse dominio sao pos-tectonicos and representam o produto de interacao entre magmas rioliticos peraluminosos com magmas mantelicos shoshoniticos.
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Efficient enrichment and recovery of rare earth elements with low concentration by membrane dispersion micro-extractors
TL;DR: In this paper, Membrane dispersion micro-extractors were used both in gas-liquid-liquid system to realize the intensification of rare earth elements extraction at high phase ratio and also in stripping process to recover the rare earth element (REEs) with low concentration.
Dissertation
Géochimie des éléments de terres rares et du plomb dans les oxydes d'uranium naturels
TL;DR: In this article, a methodologie d'analyse in situ des terres rares dans les oxydes d’uranium sur des micro-domaines par microsonde ionique (CAMECA IMS-3f) is presented.
References
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Book
Advanced Inorganic Chemistry
TL;DR: Cotton and Wilkinson's Advanced Inorganic Chemistry (AIC) as discussed by the authors is one of the most widely used inorganic chemistry books and has been used for more than a quarter century.
Journal ArticleDOI
Synthesis of the Elements in Stars
TL;DR: In this article, a count of the stable and radioactive elements and isotopes is given, and Table I,1 shows that only promethium has not been found in nature, whereas 99 elements are found terrestrially and technetium is found in stars.
Journal ArticleDOI
Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites
TL;DR: In this paper, the exact determination of REE and Ba abundances in three carbonaceous (Orgueil Cl, Murchison C2 and Allende C3) and seven olivine-bronzite chondrites were carried out by mass spectrometric isotope dilution technique.
Journal ArticleDOI
A chemical-petrologic classification for the chondritic meteorites.
W. R. Van Schmus,John A. Wood +1 more
TL;DR: In this article, a two-dimensional classification grid based on chemical and petrologic subdivisions of chondritic meteorites is proposed, which extends the current chemical subdivisions to account for varying petrolic (implied metamorphic) properties within the primary chemical groups.