Constraints on the feedstocks of the terrestrial planets from nucleosynthetic Mo and Ru isotope heterogeneities
11 May 2017 | Seminar
The presence of nucleosynthetic isotope heterogeneities in meteorites for elements with different geochemical affinities enables to deduce information on the nature of the planetary building blocks added at different stages of accretion. As a moderately siderophile element most of the Mo in the Earths mantle predominantly derives from material accreted towards the final stages of the Earths main growth phase. On the other hand, the highly siderophile element Ru was almost entirely added with the late veneer after core formation had ceased.
High precision Mo and Ru isotopic data reveal that compared to the Earths mantle primitive meteorites are characterised by increasing deficits in s-process Mo and Ru nuclides in the order of enstatite
|Date||11 May 2017|
|Speaker||Dr. Mario Fischer-Gödde, Institut für Planetologie, Münster|
|Area of expertise||Earth Sciences|
|Host||Institute of Geochemistry and Petrology|