Delivery of carbon, nitrogen, and sulfur to the silicate Earth by a giant impact

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dc.citation.articleNumbereaau3669en_US
dc.citation.issueNumber1en_US
dc.citation.journalTitleScience Advancesen_US
dc.citation.volumeNumber5en_US
dc.contributor.authorGrewal, Damanveer S.en_US
dc.contributor.authorDasgupta, Rajdeepen_US
dc.contributor.authorSun, Chenguangen_US
dc.contributor.authorTsuno, Kyuseien_US
dc.contributor.authorCostin, Geluen_US
dc.date.accessioned2019-12-06T15:32:22Zen_US
dc.date.available2019-12-06T15:32:22Zen_US
dc.date.issued2019en_US
dc.description.abstractEarth’s status as the only life-sustaining planet is a result of the timing and delivery mechanism of carbon (C), nitrogen (N), sulfur (S), and hydrogen (H). On the basis of their isotopic signatures, terrestrial volatiles are thought to have derived from carbonaceous chondrites, while the isotopic compositions of nonvolatile major and trace elements suggest that enstatite chondrite–like materials are the primary building blocks of Earth. However, the C/N ratio of the bulk silicate Earth (BSE) is superchondritic, which rules out volatile delivery by a chondritic late veneer. In addition, if delivered during the main phase of Earth’s accretion, then, owing to the greater siderophile (metal loving) nature of C relative to N, core formation should have left behind a subchondritic C/N ratio in the BSE. Here, we present high pressure-temperature experiments to constrain the fate of mixed C-N-S volatiles during core-mantle segregation in the planetary embryo magma oceans and show that C becomes much less siderophile in N-bearing and S-rich alloys, while the siderophile character of N remains largely unaffected in the presence of S. Using the new data and inverse Monte Carlo simulations, we show that the impact of a Mars-sized planet, having minimal contributions from carbonaceous chondrite-like material and coinciding with the Moon-forming event, can be the source of major volatiles in the BSE.en_US
dc.identifier.citationGrewal, Damanveer S., Dasgupta, Rajdeep, Sun, Chenguang, et al.. "Delivery of carbon, nitrogen, and sulfur to the silicate Earth by a giant impact." <i>Science Advances,</i> 5, no. 1 (2019) AAAS: https://doi.org/10.1126/sciadv.aau3669.en_US
dc.identifier.digitaleaau3669.fullen_US
dc.identifier.doihttps://doi.org/10.1126/sciadv.aau3669en_US
dc.identifier.urihttps://hdl.handle.net/1911/107792en_US
dc.language.isoengen_US
dc.publisherAAASen_US
dc.rightsDistributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/en_US
dc.titleDelivery of carbon, nitrogen, and sulfur to the silicate Earth by a giant impacten_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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