%0 Journal Article %T Zinc isotope anomalies in primitive meteorites identify the outer solar system as an important source of Earth's volatile inventory %+ Institut de Physique du Globe de Paris (IPGP (UMR_7154)) %+ School of Earth and Environmental Sciences [University St Andrews] %+ Laboratoire Magmas et Volcans (LMV) %A Savage, Paul %A Moynier, Frédéric %A Boyet, Maud %< avec comité de lecture %@ 0019-1035 %J Icarus %I Elsevier %V 386 %P 115172 %8 2022 %D 2022 %R 10.1016/j.icarus.2022.115172 %K Meteorites %K Cosmochemistry %K Origin %K solar system %K Accretion %Z Sciences of the Universe [physics]/Earth Sciences/Geochemistry %Z Sciences of the Universe [physics]/Earth Sciences/PlanetologyJournal articles %X The source of and timing of delivery of the volatile elements to Earth is a question that is fundamental to understanding how our planet evolved. Here, we show that primitive meteorites have resolved mass-independent Zn isotope anomalies from the terrestrial reservoir. Carbonaceous chondrites (CC), likely originating from the outer Solar System are distinct from non-CC, and Earth is intermediate between these two components. Modelling based on these data indicates that around 30% of Earth's budget of Zn and other moderately volatile material derives from the participation of 6% of CC-like materials during Earth's accretion, with the remaining coming from NC meteorites. This implies that, despite the relatively minor mass of Earth thought to derive from CC-like material, the CC component of Earth was relatively and significantly volatile-enriched; this is in line with the observation that the terrestrial elemental abundance pattern of moderately volatile elements could be explained by a carbonaceous source, and with the carbonaceous chondrite-like isotopic budget of more volatile-rich material accreted later in Earth's accretion history (e.g. Hg, Se, N, noble gases). %G English %2 https://hal.science/hal-03859720/document %2 https://hal.science/hal-03859720/file/2022_Savage%20etal%20Icarus.pdf %L hal-03859720 %U https://hal.science/hal-03859720 %~ IRD %~ INSU %~ AFRIQ %~ PRES_CLERMONT %~ CNRS %~ IPGP %~ LMV %~ ACL-SF %~ OPGC %~ UNIV-PARIS %~ UNIVERSITE-PARIS %~ ANR