Origin of metal from CB chondrites in an impact plume – A combined study of Fe and Ni isotope composition and trace element abundances

Nickel isotope fractionation during metal-silicate differentiation of planetesimals: Experimental petrology and ab initio calculations

“…Similarly, the Ni iso tope composition also varies within meteorite groups, e.g., among ordinary chondrites or iron meteorites types (Gall et al, 2017 and references therein). A fractionation is also observed as well in metal grains of CB/CH chondrites (Weyrauch et al, 2019). Last but not least, recent studies based on in situ measurements of nickel isotopes in silicate and metal phases in pallasites and mesosiderites show vari able metal silicate fractionation of nickel isotopes.…”

Innovative two-step isolation of Ni prior to stable isotope ratio measurements by MC-ICP-MS: application to igneous geological reference materials

“…[4][5][6][7][8][9][10][11][12] Nickel mass-dependent stable isotope variations, on the other hand, have provided insights into a range of cosmochemical processes such as condensation, metal-silicate segregation and early planetary differentiation. [13][14][15][16][17][18][19][20][21] Due to its siderophile tendency, $93% of the terrestrial inventory of Ni is alloyed with iron in Earth's core. 22 Yet, Ni is ubiquitous in the silicate Earth, 23 oceans 24 and atmospheric systemwhere anthropogenic inputs are the dominant emission source.…”

Mercury's Interior Structure Constrained by Density and P‐Wave Velocity Measurements of Liquid Fe‐Si‐C Alloys

“…These chondrites are in various studies mentioned as compositional analogs for Mercury (e.g., Taylor & Scott, 2003). Although the origin of the CB chondrites is still under debate (Petaev et al., 2001; Weisberg et al., 2001; Weyrauch et al., 2019; and references therein) the CB chondrites have a metal to silicate ratio that is similar to that of Mercury. Accretion of this or a similar chondrite type may explain the large Fe fraction of Mercury (Taylor & Scott, 2003).…”