{"id":42519,"date":"2026-08-29T11:29:02","date_gmt":"2026-08-29T09:29:02","guid":{"rendered":"https:\/\/karmaka.de\/?p=42519"},"modified":"2026-08-29T11:29:03","modified_gmt":"2026-08-29T09:29:03","slug":"the-nc-cc-dichotomy-in-ruthenium-isotopes-implications-for-the-origin-of-the-late-veneer","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=42519","title":{"rendered":"The NC-CC dichotomy in ruthenium isotopes: Implications for the origin of the late veneer<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Jonas Pape, Emily A. Worsham, Thorsten Kleine<\/p>\n\n\n\n<p>Icarus<br>Available online 28 August 2026<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S001910352600374X\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK + PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<ul>\n<li>High-precision Ru isotope data of iron meteorites are presented.<\/li>\n\n\n\n<li>A novel internal normalization scheme for Ru isotope measurements is introduced.<\/li>\n\n\n\n<li>Ruthenium isotope data reveal the NC-CC dichotomy.<\/li>\n\n\n\n<li>The Ru isotope systematics of meteorites and terrestrial samples provide new constraints on an NC origin of the late veneer.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;High-precision mass-independent Ru isotope data for iron meteorites reveal that in three-isotope diagrams including the p-process Ru nuclides 96Ru or 98Ru, non\u2011carbonaceous (NC) meteorites plot along an s-process mixing line, while the carbonaceous (CC) type irons plot as a cluster off the NC-line. As previously observed for Mo, this offset can be accounted for by an r-process excess in CC over NC materials. As a highly siderophile element, Ru in the bulk silicate Earth (BSE) is thought to predominantly derive from the late veneer, making the Ru isotope dichotomy a powerful genetic tracer of Earth&#8217;s late accretionary epoch. The BSE and the isotopically anomalous Itsaq Gneiss Complex as defined in prior studies plot on the NC-line defined in this study, suggesting a predominantly NC late veneer that may have evolved over time from more s-process-enriched to more s-process-depleted compositions. However, more precise 96Ru and 98Ru measurements of the BSE&#8217;s composition are needed to more reliably determine the genetic heritage of the late veneer and to quantify as to whether it contains CC material.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jonas Pape, Emily A. Worsham, Thorsten Kleine IcarusAvailable online 28 August 2026 LINK + PDF (OPEN ACCESS) &#8220;Highlights &#8220;High-precision mass-independent Ru isotope data for iron meteorites reveal that in three-isotope diagrams including the p-process Ru&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74,112,371,4867,689,5639,851,1038,813,214,255,73],"tags":[7301,7302,4819,4340,2001,1881,3943,1676,3944,1897,1541,1895,1877,642,4453,4857,5193,3427,3554,5372,5787],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42519"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=42519"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42519\/revisions"}],"predecessor-version":[{"id":42520,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42519\/revisions\/42520"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=42519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=42519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=42519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}