Heterogeneous accretion of Earth inferred from Mo-Ru isotope systematics
نویسندگان
چکیده
منابع مشابه
Constraints on source-forming processes of West Greenland kimberlites inferred from Hf-Nd isotope systematics
Kimberlites from West Greenland have Hf–Nd isotope as well as major and trace element compositions that are similar to other Group I kimberlites, but that are distinctive in the spectrum of magmas sampled at Earth’s surface. The West Greenland kimberlites have eNdi that ranges from +1.6 to +3.1 and eHfi that ranges from 4.3 to +4.9. The samples exhibit ubiquitous negative DeHfi (deviation from ...
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Several models exist to describe the growth and evolution of Earth; however, variables such as the type of precursor materials, extent of mixing, and material loss during accretion are poorly constrained. High-precision palladium-silver isotope data show that Earth's mantle is similar in 107Ag/109Ag to primitive, volatile-rich chondrites, suggesting that Earth accreted a considerable amount of ...
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Introduction: Many meteorite parent bodies as well as the terrestrial planets are characterized by a depletion in moderately volatile elements compared to CI chondrites and the solar nebula. Determining the timing of this depletion is key for constraining the nature of the depletion process and such time constraints can be obtained from the Rb-Sr systematics of meteorites and some of their comp...
متن کاملOsmium isotope systematics of ureilites
The Os/Os for 22 ureilite whole rock samples, including monomict, augite-bearing, and polymict lithologies, were examined in order to constrain the provenance and subsequent magmatic processing of the ureilite parent body (or bodies). The Re/Os ratios of most ureilites show evidence for a recent disturbance, probably related to Re mobility during weathering, and no meaningful chronological info...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2020
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2020.116065