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
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Three natural zircon standards for u‐th‐pb, lu‐hf, trace element and ree analyses
M. Wiedenbeck,P. Allé,Fernando Corfu,William L. Griffin,M. Meier,F. Oberli,A. von Quadt,J.C. Roddick,W. Spiegel +8 more
TL;DR: In this paper, the results of a study to develop natural zircon geochemical standards for calibrating the U-(Th)-Pb geochronometer and Hf isotopic analyses are reported.
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Chemical differentiation of the Earth: the relationship between mantle, continental crust, and oceanic crust
TL;DR: In this paper, the average chemical compositions of the continental crust and the oceanic crust (represented by MORB), normalized to primitive mantle values and plotted as functions of the apparent bulk partition coefficient of each element, form surprisingly simple, complementary concentration patterns.
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Sm-Nd isotopic evolution of chondrites
TL;DR: In this paper, it was shown that none of the analyzed meteorite samples deviated more than 0.5 e-units from a 4.6-AE reference isochron and defined an initial 4.5-AE value for CHUR using the Juvinas data of Lugmair.
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Solar-system abundances of the elements
Edward Anders,Mitsuru Ebihara +1 more
TL;DR: In this paper, the Ogueil Cl meteorite and all previous Cl chondrite analyses were employed to develop a new solar system abundance table, including the standard deviation and number of analyses for each element.
References
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Journal ArticleDOI
Determination of rare earth elements in rocks and minerals by mass spectrometric, stable isotope dilution technique
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Search for extinct146Sm, 1. The isotopic abundance of142Nd in the Juvinas meteorite
TL;DR: In this article, the isotopic abundance of Nd in bulk rock samples and in mineral separates of the Juvinas meteorite was investigated as part of their search for evidence of extinct146Sm.
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On the irradiation history and origin of gas-rich meteorites
TL;DR: In this article, the authors made detailed studies of the track density gradients and irradiation geometries of track-rich grains and chondrules in sections of Fayetteville and Kapoeta.
Bulk, rare earth and other trace elements in Apollo 14 and 15 and Luna 16 samples
TL;DR: For example, measurements of 24 and 34 bulk, minor, and trace elements in lunar specimens by instrumental and radiochemical neutron activation analysis shows greater Al2O3, Na2O, and K2O abundances and higher TiO2, FeO, MnO and Cr2O 3 depletions in Apollo 14 soil samples as compared to Apollo 11 samples and to most of Apollo 12 samples.