Highly siderophile element and osmium isotope systematics of basaltic volcanics: A different approach to petrological processes

Osmium Isotope and Highly Siderophile Element Compositions of Lunar Orange and Green Glasses

Introduction: The absolute and relative abundances of the highly siderophile elements (HSE) present in planetary mantles are primarily controlled by: 1) silicate-metal partitioning during core-mantle differentiation, 2) the subsequent addition of HSE to mantles via continued planetary accretion [1-3]. Consequently, constraints on the absolute and relative abundances of the HSE in the lunar mant...

Osmium 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...

FURTHER STUDY OF Os/Os AND HIGHLY SIDEROPHILE ELEMENT SYSTEMATICS OF APOLLO

Introduction: We have continued study of the chemical nature of late accreted materials to the Earth-Moon system by examining the highly sidero-phile elements (HSE: Ru, Pd, Re, Os, Ir, Pt) contained in lunar impact-melt rocks. The HSE contained in melt rocks were largely added to the Moon during the period of time from the origin of the lunar highlands crust (4.4-4.5 Ga) to the end of the late ...

Re-Os AND HIGHLY SIDEROPHILE ELEMENT SYSTEMATICS OF SHERGOTTITES: NEW PUZZLES REGARDING THE MARTIAN

Peridotites from Another Planet? Osmium Isotope and Highly Siderophile Element Constraints on the Evolution of Diogenites and the Hed Parent Body

Diogenites and 4 Vesta: Diogenite meteorites are orthopyroxene ± olivine rich rocks that form part of the howardite-eucrite-diogenite (HED) meteorite suite [1, 2]. The HED parent-body is thought to be the ~530 km diameter asteroid 4 Vesta [3, 4], target of the recently launched DAWN mission. Homogeneous Oisotope systematics for HED meteorites are consistent with wholesale melting of their paren...