Results 241 to 250 of about 1,035,856 (262)
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Lu–Hf zircon evidence for rapid lunar differentiation
Earth and Planetary Science Letters, 2009Abstract Zircons from the Apollo 14 polymict breccias 14304, 14305, and 14321 crystallized from highly incompatible-trace-element enriched sources over an extended period of early lunar history from 4.4 to 4.0 Ga. These zircons contain the least radiogenic 176Hf/177Hf yet observed in lunar samples, consistent with their source magmas containing a ...
Dianne J. Taylor +2 more
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On the Lu‐Hf Isotope Geochemistry of Silicate Rocks
Geostandards Newsletter, 2001This paper reviews the history (TIMS, hot‐SIMS, MC‐ICP‐MS), significance, geochemical behaviour and current uncertainties (λ176 Lu, Hf‐Nd Bulk Silicate Earth) surrounding the Lu‐Hf isotope system, and thus marks two decades of its application to geochemical problems.
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Isotopic evidence for chondritic Lu/Hf and Sm/Nd of the Moon
Earth and Planetary Science Letters, 2013Abstract Refractory lithophile elements are generally considered to occur in chondritic relative abundances in terrestrial planets. This assumption forms the basis for using isotope systems such as 176Lu–176Hf and 146, 147Sm–142, 143Nd as tracers of planetary evolution.
Sprung Peter +2 more
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Lu-Hf and Sm-Nd isotope systems in zircon
Reviews in Mineralogy and Geochemistry, 2003As a significant carrier of uranium, thorium and the rare earth elements (REEs) at ppm level, and hafnium at the percent level, zircon hosts a remarkable number of long-lived radioactive isotopes and their stable decay products. These include 238U, 235U and 232Th which decay via intermediate steps to 206Pb, 207Pb and 208Pb, respectively, 176Lu which ...
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Lu‐Hf and Sm‐Nd evolution in lunar mare basalts
Journal of Geophysical Research: Solid Earth, 1984Lu‐Hf and Sm‐Nd data for mare basalts combined with Rb‐Sr and total REE data taken from the literature suggest that the mare basalts were derived by small (≤10%) degrees of partial melting of cumulate sources, but that the magma ocean from which these sources formed was light REE and Hf‐enriched.
D. M. Unruh +3 more
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In-situ Lu-Hf geochronology of carbonates
Goldschmidt2022 abstracts, 2022Alexander Simpson +5 more
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The role of phosphates for the Lu-Hf chronology of meteorites
2011info:eu-repo/semantics ...
Debaille, Vinciane +2 more
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The Lu-Hf isotope geochemistry of chondrites and the evolution of the mantle-crust system
Earth and Planetary Science Letters, 1997Abstract We report analyses of the176Hf/177Hf ratio for 25 chondrites from different classes of meteorites (C, O, and E) and the176Lu/177Hf ratio for 23 of these as measured by plasma source mass spectrometry. We have obtained a new set of present-day mean values in chondrites of176Hf/177Hf= 0.282772 ± 29 and176Lu/177Hf= 0.0332 ± 2.
Janne Blichert-Toft, Francis Albarède
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New developments in laser ablation Lu-Hf geochronology
Goldschmidt2023 abstracts, 2023Stijn Glorie +5 more
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Supplementary material to "In-situ Lu – Hf geochronology of calcite"
2022Alexander Simpson +5 more
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