Browsing ELibrary by Subject "HAFNIUM"
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Browsing ELibrary by Subject "HAFNIUM"
Now showing items 1-6 of 6
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(1999)This paper presents a Hf and Zr chemical purification method and calibration procedure used to measure Zr/Hf ratios in terrestrial and extraterrestrial rocks by isotope dilution mass spectrometry with a mixed 96Zr-179Hf ...
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(2000)In order to evaluate the widely accepted assumption that Zr/Hf ratios are uniform and chondritic (i.e. equal to 36.6) in terrestrial rocks [Jochum et al., Geochim. Cosmochim. Acta 50 (1986) 1173-1183], precise Zr/Hf ...
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(2000)Excesses and deficiencies in 182W in meteorites and lunar samples relative to the terrestrial 182W atomic abundance have been assigned to the decay of 182Hf (t1/2=9 Ma) and have been used to date metal-silicate fractionation ...
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(1996)The W isotopic composition of the bulk silicate Earth (BSE) is chondritic within current analytical uncertainties, indicating that terrestrial core formation commenced more than 50 Myr after the differentiation of the ...
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(2001)The high field strength elements (HFSE) play a critical role in the interpretation of chemical variation within subduction-related magmas by providing an assumed mantle-dominated 'baseline' from which enrichments in many ...
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(1999)We report new Hf (and Nd) data for more than 100 sedimentary samples, recent to Archean in age, from a wide range of depositional environments. These data document the behavior of Lu-Hf and Sm-Nd isotopic systems in the ...
Now showing items 1-6 of 6