The effect of core segregation on the Cu and Zn isotope composition of the silicate Moon

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dc.contributor.authorXia, Y.
dc.contributor.authorKiseeva, Ekaterina S.
dc.contributor.authorWade, J.
dc.contributor.authorHuang, F.
dc.contributor.funderChinese Academy of Sciencesen
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderNatural Environment Research Councilen
dc.date.accessioned2019-11-22T12:32:29Z
dc.date.available2019-11-22T12:32:29Z
dc.date.issued2019-11-19
dc.date.updated2019-11-22T12:23:14Z
dc.description.abstractCompared to elements of similar volatility, such as Rb, Ga and K, the bulk silicate Moon (BSM) exhibits significant enrichment in the heavy isotopes of Zn and Cu. However, both elements display a greater affinity for lunar sulfide phases than the other volatiles, suggesting their isotopic abundance in the BSM may also reflect their sequestration to the lunar core. Experimentally determined Cu and Zn isotopic fractionation between liquid metal, sulfide and silicates reveals carbon-bearing iron melts to be isotopically heavier than the silicate melt, and sulfide melts the lightest. During sulfide sequestration from a cooling lunar magma ocean, Cu, unlike Zn, partitions strongly into sulfides (100 < DCuSulfide/Melt < 200), leaving the BSM both elementally depleted in Cu, and isotopically heavier. Sulfide sequestration therefore explains the larger offsets in the Cu isotope compositions of lunar rocks and the silicate Earth relative to other moderately volatile elements. The lunar Zn isotopic inventory is best explained by volatility driven surface processes. Irrespective of the elemental loss mechanism, the Cu isotopic content of the BSM rules out carbon as a significant light element of the lunar core.en
dc.description.sponsorshipChinese Academy of Sciences (Strategic Priority Research Program (B) (Grant No. XDB18000000)); National Science Foundation of China (41325011, 41630206);en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationXia, Y., Kiseeva, E. S., Wade, J. and Huang, F. (2019) 'The effect of core segregation on the Cu and Zn isotope composition of the silicate Moon', Geochemical Perspectives Letters, 12, pp. 12-17. doi: 10.7185/geochemlet.1928en
dc.identifier.doi10.7185/geochemlet.1928en
dc.identifier.endpage17en
dc.identifier.issn2410-339X
dc.identifier.journaltitleGeochemical Perspectives Lettersen
dc.identifier.startpage12en
dc.identifier.urihttps://hdl.handle.net/10468/9180
dc.identifier.volume12en
dc.language.isoenen
dc.publisherEuropean Association of Geochemistryen
dc.relation.projectinfo:eu-repo/grantAgreement/RCUK/NERC/NE/L010828/1/GB/Sulphides - Economically important geochemical messengers from the mantle/en
dc.relation.projectinfo:eu-repo/grantAgreement/RCUK/NERC/NE/K009540/1/GB/Experimental measurements of volatility in igneous systems/en
dc.relation.urihttp://www.geochemicalperspectivesletters.org/article1928
dc.rights© The Authors. Published by the European Association of Geochemistry under Creative Commons License CC BY-NC-ND 4.0en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectLunar isotopesen
dc.subjectLunar formationen
dc.subjectElemental volatilityen
dc.subjectExperimental petrologyen
dc.subjectLunar core formationen
dc.subjectSulfide-silicate isotopic partitioningen
dc.titleThe effect of core segregation on the Cu and Zn isotope composition of the silicate Moonen
dc.typeArticle (peer-reviewed)en
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