Results 11 to 20 of about 1,035,856 (262)
Garnet Reference Materials for In Situ Lu‐Hf Geochronology [PDF]
Geostandards and Geoanalytical ResearchIn situ garnet Lu‐Hf geochronology has the potential to revolutionise the chronology of petrological and tectonic processes, yet there is a paucity of well‐characterised reference materials to account for laser‐induced matrix‐dependant elemental fractionation.
Bruno V. Ribeiro +14 more
openaire +4 more sources
Combined Chemical Separation of Lu, Hf, Sm, Nd, and REEs from a Single Rock Digest: Precise and Accurate Isotope Determinations of Lu−Hf and Sm−Nd Using Multicollector-ICPMS [PDF]
Analytical Chemistry, 2001 A combined procedure for separating Lu, Hf, Sm, Nd, and rare earth elements (REEs) from a single sample digest is presented. The procedure consists of the following five steps: (1) sample dissolution via sodium peroxide sintering; (2) separation of the high field strength elements from the REEs and other matrix elements by a HF-free anion-exchange ...
Kleinhanns, IC +5 more
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The role of phosphates for the Lu–Hf chronology of meteorites [PDF]
Earth and Planetary Science Letters, 2017 Abstract The 176Lu–176Hf isotopic system is widely used for dating and tracing cosmochemical and geological processes, but still suffers from two uncertainties. First, Lu–Hf isochrons for some early Solar System materials have excess slope of unknown origin that should not be expected for meteorites with ages precisely determined with other isotopic ...
Debaille, Vinciane +3 more
openaire +3 more sources
Geochimica et Cosmochimica Acta, 2005 Abstract The mineral apatite is characterized by elevated and highly variable Lu/Hf ratios that, in some cases, allow for single-crystal dating by the Lu-Hf isotopic system. Apatites from the Adirondack Lowlands and Otter Lake area in the Grenville Province, and from the Black Hills, South Dakota, yield Lu-Hf ages that are consistently older than ...
Hoffmann Barfod*, Gry +3 more
openaire +2 more sources
The Hf-INATOR: A free data reduction spreadsheet for Lu/Hf isotope analysis
Earth Science Informatics, 2017 During the last decade, the in situ Lu-Hf isotope methodology has been widely used in Earth sciences and the number of laboratories performing Lu-Hf analysis has increased together with dedicated scientific software. However, free and user-friendly software for the Lu-Hf data reduction is currently missing. We present the ‘Hf-INATOR’, a new interactive
Giovanardi, T., Lugli, F.
openaire +3 more sources
Retentiveness of rare earth elements in garnet with implications for garnet Lu‐Hf chronology [PDF]
Journal of Metamorphic GeologyAbstractIncorporation of rare earth elements (REE) in garnet enables garnet chronology (Sm‐Nd, Lu‐Hf), and imparts a garnet‐stable signature on cogenetic phases, which allows petrochronology and general petrogenetic tracing of garnet stability in minerals and melts.
Smit, Matthijs A. +8 more
openaire +5 more sources
U-Pb and Lu-Hf systematics of Antarctic meteorites [PDF]
U-Pb and Lu-Hf systematics of Antarctic meteorites, 1981 P(論文) U-Th-Pb analyses for the chondrites-ALHA77278 (LL3), Bishunpur (LL3) and McKinney (L4) have been performed in order to evaluate the effects of weathering under Antarctic conditions on the U-Th-Pb system. The ALHA77278 data indicate that, although this sample is apparently less contaminated than McKinney, a normal "find", it may still contain as ...
Patchett, P. Johathan +2 more
core +3 more sources
Supplementary file 1: calcite Lu-Hf data
, 2021 Data set corresponding to manuscript titled: "In-situ Lu – Hf geochronology of calcite"
Alexander Simpson (6480185)
core +2 more sources
Lu-Hf ratios of crustal rocks and their bearing on zircon Hf isotope model ages: The effects of accessories [PDF]
, 2018 All other factors being equal, the calculation of zircon Hf two stage model ages (TDM Hf) depends on the par- ticular Lu/Hf value assumed for the magmatic source, the effect being more pronounced as the age difference between zircon and magmatic source ...
Bea Barredo, Fernando +5 more
core +3 more sources