About: Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite     Goto   Sponge   NotDistinct   Permalink

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  • Refractory inclusions in primitive meteorites are the oldest objects formed in the Solar System. They exhibit large mass-dependent isotopic effects in many elements, including Si, Mg and Ca, indicative of their complex origin. We report data for both mass dependent (d) and mass-independent (e) Ca isotopic effects, and rare earth element (REE) abundances in six refractory inclusions from the Allende meteorite. Data reveal mass-dependent Ca isotopic effects in these refractory inclusions, with d44/40Ca ranging from -5.60 to +0.35, which are significantly lower than that of the bulk silicate Earth. Importantly, d44/40Ca is correlated with REE patterns: refractory inclusions with Group II REE patterns have lighter Ca isotope compositions compared to those with Group I REE patterns. The studied refractory inclusions form negative 44Ca/40Ca-Tm/Er trends, implying segregation of up to 3% of an ultrarefractory evaporation residue from a chondritic reservoir prior to the formation of refractory inclusions.
  • Refractory inclusions in primitive meteorites are the oldest objects formed in the Solar System. They exhibit large mass-dependent isotopic effects in many elements, including Si, Mg and Ca, indicative of their complex origin. We report data for both mass dependent (d) and mass-independent (e) Ca isotopic effects, and rare earth element (REE) abundances in six refractory inclusions from the Allende meteorite. Data reveal mass-dependent Ca isotopic effects in these refractory inclusions, with d44/40Ca ranging from -5.60 to +0.35, which are significantly lower than that of the bulk silicate Earth. Importantly, d44/40Ca is correlated with REE patterns: refractory inclusions with Group II REE patterns have lighter Ca isotope compositions compared to those with Group I REE patterns. The studied refractory inclusions form negative 44Ca/40Ca-Tm/Er trends, implying segregation of up to 3% of an ultrarefractory evaporation residue from a chondritic reservoir prior to the formation of refractory inclusions. (en)
Title
  • Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite
  • Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite (en)
skos:prefLabel
  • Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite
  • Calcium isotopic ratios and rare earth element abundances in refractory inclusions from Allende CV3 chondrite (en)
skos:notation
  • RIV/60460709:41330/12:51803!RIV13-MSM-41330___
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  • S
http://linked.open...iv/cisloPeriodika
  • 77
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  • 125797
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  • RIV/60460709:41330/12:51803
http://linked.open...riv/jazykVysledku
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  • Calcium Isotopes Refractory Inclusions Allende Chondrite (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CZ - Česká republika
http://linked.open...ontrolniKodProRIV
  • [B523F5ED1654]
http://linked.open...i/riv/nazevZdroje
  • GEOCHIMICA ET COSMOCHIMICA ACTA
http://linked.open...in/vavai/riv/obor
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http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 2012
http://linked.open...iv/tvurceVysledku
  • Farkaš, Juraj
  • Gang, Yu
  • Petaev, Michail
  • Shichun, Huang
  • Stein, Jacobsen
http://linked.open...ain/vavai/riv/wos
  • 000299010400017
issn
  • 0016-7037
number of pages
http://localhost/t...ganizacniJednotka
  • 41330
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