{"refrec":{"BRefID":331850,"RR":"<b>Hu, Y.; Teng, F.-Z.; Plank, T.; Chauvel, C.</b> (2020). Potassium isotopic heterogeneity in subducting oceanic plates. <i>Science Advances 6(49)</i>: eabb2472. <a href=\"https://dx.doi.org/10.1126/sciadv.abb2472\" target=\"_blank\">https://dx.doi.org/10.1126/sciadv.abb2472</a>","BEntID":325462,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Science Advances 6(49)</i>: eabb2472. <a href=\"https://dx.doi.org/10.1126/sciadv.abb2472\" target=\"_blank\">https://dx.doi.org/10.1126/sciadv.abb2472</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hu, Y.; Teng, F.-Z.; Plank, T.; Chauvel, C.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hu, Y. <i>et al.</i>","Englishabstract":"Oceanic crust and sediments are the primary K sinks for seawater, and they deliver considerable amounts of K to the mantle via subduction. Historically, these crustal components were not studied for K isotopes because of the lack of analytical precision to differentiate terrestrial variations. Here, we report a high-precision dataset that reveals substantial variability in oceanic plates and provides further insights into the oceanic K cycle. Sixty-nine sediments worldwide yield a broad δ<sup>41</sup>K range from −1.3 to −0.02‰. The unusually low values are indicative of release of heavy K during continental weathering and uptake of light K during submarine diagenetic alteration. Twenty samples of altered western Pacific crust from ODP Site 801 display δ<sup>41</sup>K from −0.60 to −0.05‰, averaging at −0.32‰. Our results indicate that submarine alteration of oceanic plates is essential for generating the high-δ<sup>41</sup>K signature of seawater. These regionally varying subducting components are heterogeneous K inputs to the mantle.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Potassium isotopic heterogeneity in subducting oceanic plates","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":2020,"MonPub":null,"DateUpdate":"2020-12-09","DateCreate":"2020-12-09","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000596477400008","VABBcode":null,"OpenAcc":1,"DOI":"10.1126/sciadv.abb2472"},"refs":null,"anarec":{"AnaID":331850,"PubliDate":2020,"Pagination":"eabb2472","XtraPublOfAnaID":null,"ISBN":null,"Volume":"6","Issue":"49","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":248966,"SerRR":"Science Advances. AAAS: New York.  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