Comparative 187Re-187Os systematics of chondrites: Implications regarding early solar system processes

By R. Walker, M. Horan, J. Morgan, H. Becker, J. Grossman, A. Rubin. 2002

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Terrestrial planet formation with strong dynamical friction (2006, background): “…(2002) also note that the osmium isotope ratios in the Earth’s mantle are similar to ordinary chondrites but different from carbonaceous chondrites (e.g., Meisel et al., 2001; Walker et al., 2002), suggesting an inner-asteroid-belt or terrestrial-planet-region source of the late veneer impactors.”
Cosmochemical Estimates of Mantle Composition (2014, unknown): “As the 187Os/186Os ratios of upper mantle rocks are similar to Hchondrites but different from carbonaceous chondrites (Walker et al., 2002), mantle abundances are estimated by assuming H-chondrite ratios among the HSEs.”
Modeling fractional crystallization of group IVB iron meteorites (2008, background): “Further, the ratio constraints for chondrites are best defined for Re/Os and Pt/Os compared to ratios of other HSE because of the sensitivity of 187 Os/ 188 Os and 186 Os/ 188 Os ratios in modern chondrites to track these ratios over the history of the solar system (Walker et al., 2002).”