Selective transport of primordial signatures across the core-mantle boundary by adsorption

Selective transport of primordial signatures across the core-mantle boundary by adsorption | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Physical Sciences - Article Selective transport of primordial signatures across the core-mantle boundary by adsorption Jie Deng, Yihang Peng, Yaochen Yu, Junwei Li, Zhixue Du, Tao Long, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5478733/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The anti-correlation between the 3 He/ 4 He and 182 W/ 184 W ratios observed in some ocean island basalts suggests possible core contributions to the plume source. However, the mechanism by which He and W are transported across the core-mantle boundary remains elusive. Here, we combine high-pressure experiments and large-scale atomistic simulations to assess element transport from the core to the mantle via oxide exsolution. We find that adsorption can effectively operate at ultra-high temperatures under planetary core conditions. Ferropericlase nanoparticles can selectively adsorb W but not Pt, suggesting that W may be fractionated from highly siderophile elements by oxide exsolution. The adsorption mechanism may imprint core-like isotopic signatures onto ocean island basalts and potentially affect the Earth’s deep geochemical cycles. Earth and environmental sciences/Solid Earth sciences/Core processes Earth and environmental sciences/Solid Earth sciences/Geochemistry Earth and environmental sciences/Solid Earth sciences/Geophysics Physical sciences/Materials science/Nanoscale materials/Nanoparticles Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SI.pdf Supplementary Information extendeddata.pdf Extended Data Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5478733","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Physical Sciences - Article","associatedPublications":[],"authors":[{"id":401128105,"identity":"5ea3784d-6599-4104-ab88-f3cdd8c81805","order_by":0,"name":"Jie 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