Hydrogen isotope evidence for the origin and evolution of the carbonaceous chondrites 1 1Associate editor: M. M. Grady

2004 ◽  
Vol 68 (6) ◽  
pp. 1395-1411 ◽  
Author(s):  
John M. Eiler ◽  
Nami Kitchen
Keyword(s):  
Hydrogen Isotope ◽  
Carbonaceous Chondrites ◽  
Origin And Evolution ◽  
Isotope Evidence

scholarly journals Hydrogen isotope evidence for loss of water from Mars through time

2008 ◽  
Vol 35 (5) ◽  
Author(s):  
James P. Greenwood ◽  
Shoichi Itoh ◽  
Naoya Sakamoto ◽  
Edward P. Vicenzi ◽  
Hisayoshi Yurimoto
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Evidence

scholarly journals Iron isotope evidence for very rapid accretion and differentiation of the proto-Earth

2020 ◽  
Vol 6 (7) ◽  
pp. eaay7604 ◽  
Author(s):  
Martin Schiller ◽  
Martin Bizzarro ◽  
Julien Siebert
Keyword(s):  
Solar System ◽  
Isotope Composition ◽  
Terrestrial Planets ◽  
Carbonaceous Chondrites ◽  
Iron Isotope ◽  
System Composition ◽  
Solar System Objects ◽  
History Of ◽  
Isotope Evidence ◽  
Enstatite Chondrites

Nucleosynthetic isotope variability among solar system objects provides insights into the accretion history of terrestrial planets. We report on the nucleosynthetic Fe isotope composition (μ54Fe) of various meteorites and show that the only material matching the terrestrial composition is CI (Ivuna-type) carbonaceous chondrites, which represent the bulk solar system composition. All other meteorites, including carbonaceous, ordinary, and enstatite chondrites, record excesses in μ54Fe. This observation is inconsistent with protracted growth of Earth by stochastic collisional accretion, which predicts a μ54Fe value reflecting a mixture of the various meteorite parent bodies. Instead, our results suggest a rapid accretion and differentiation of Earth during the ~5–million year disk lifetime, when the volatile-rich CI-like material is accreted to the proto-Sun via the inner disk.

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