{"refrec":{"BRefID":336628,"RR":"<b>Smith, E.M.; Ni, P.; Shirey, S.B.; Richardson, S.H.; Wang, W.; Shahar, A.</b> (2021). Heavy iron in large gem diamonds traces deep subduction of serpentinized ocean floor. <i>Science Advances 7(14)</i>: eabe9773. <a href=\"https://hdl.handle.net/10.1126/sciadv.abe9773\" target=\"_blank\">https://hdl.handle.net/10.1126/sciadv.abe9773</a>","BEntID":333250,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Science Advances 7(14)</i>: eabe9773. <a href=\"https://hdl.handle.net/10.1126/sciadv.abe9773\" target=\"_blank\">https://hdl.handle.net/10.1126/sciadv.abe9773</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Smith, E.M.; Ni, P.; Shirey, S.B.; Richardson, S.H.; Wang, W.; Shahar, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Smith, E.M. <i>et al.</i>","Englishabstract":"Subducting tectonic plates carry water and other surficial components into Earth’s interior. Previous studies suggest that serpentinized peridotite is a key part of deep recycling, but this geochemical pathway has not been directly traced. Here, we report Fe-Ni–rich metallic inclusions in sublithospheric diamonds from a depth of 360 to 750 km with isotopically heavy iron (δ<sup>56</sup>Fe = 0.79 to 0.90‰) and unradiogenic osmium (<sup>187</sup>Os/<sup>188</sup>Os = 0.111). These iron values lie outside the range of known mantle compositions or expected reaction products at depth. This signature represents subducted iron from magnetite and/or Fe-Ni alloys precipitated during serpentinization of oceanic peridotite, a lithology known to carry unradiogenic osmium inherited from prior convection and melt depletion. These diamond-hosted inclusions trace serpentinite subduction into the mantle transition zone. We propose that iron-rich phases from serpentinite contribute a labile heavy iron component to the heterogeneous convecting mantle eventually sampled by oceanic basalts.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Heavy iron in large gem diamonds traces deep subduction of serpentinized ocean floor","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-04-21","DateCreate":"2021-04-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000636455600024","VABBcode":null,"OpenAcc":1,"Handle":"10.1126/sciadv.abe9773"},"refs":null,"anarec":{"AnaID":336628,"PubliDate":2021,"Pagination":"eabe9773","XtraPublOfAnaID":null,"ISBN":null,"Volume":"7","Issue":"14","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":248966,"SerRR":"Science Advances. 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