{"id":40191,"date":"2026-02-21T14:10:35","date_gmt":"2026-02-21T13:10:35","guid":{"rendered":"https:\/\/karmaka.de\/?p=40191"},"modified":"2026-02-21T14:10:36","modified_gmt":"2026-02-21T13:10:36","slug":"nitrogen-isotopic-variations-in-the-early-solar-system-recorded-by-pallasites","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=40191","title":{"rendered":"Nitrogen isotopic variations in the early Solar System recorded by pallasites<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>J. Gamblin, E. F\u00fcri, B. Luais, L. Zimmermann<\/p>\n\n\n\n<p>Geochemical Perspectives Letters, V39<br>Published 17 February 2026<\/p>\n\n\n\n<p><a href=\"https:\/\/www.geochemicalperspectivesletters.org\/article2607\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.geochemicalperspectivesletters.org\/documents\/GPL2607_SI.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;To gain new insights into nitrogen (N) isotopic variations in the early Solar System, N and noble gas (Ne, Ar) isotopes were measured in metal fragments and olivine separates from thirteen pallasites and five IIIAB iron meteorites. While \u03b415N values in olivine are affected by cosmogenic 15N, as demonstrated by cosmogenic 21Ne abundances, the \u03b415N values of metal phases reflect reservoir signatures rather than secondary processes. Non-carbonaceous (NC) pallasites have lower \u03b415N values (\u201388.86\u2009\u00b1\u20090.90 \u2030 to \u201345.04\u2009\u00b1\u20090.91 \u2030) than carbonaceous (CC) pallasites (\u201334.03\u2009\u00b1\u20090.69 \u2030 to \u201326.12\u2009\u00b1\u20090.64 \u2030), indicating their parent bodies accreted isotopically distinct N-bearing precursors in the inner and outer regions of the protoplanetary disk. The \u03b415N variations within each reservoir also suggest N isotopic heterogeneity at a smaller scale. While NC irons and NC pallasites exhibit overlapping \u03b415N values, CC pallasites are less 15N-rich than CC irons, implying that their parent bodies accreted in different locations and\/or at different times within the outer disk.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>J. Gamblin, E. F\u00fcri, B. Luais, L. Zimmermann Geochemical Perspectives Letters, V39Published 17 February 2026 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;To gain new insights into nitrogen (N) isotopic variations in the early Solar System, N&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1038,214,810,420],"tags":[542,247,5294,1541,4565,2346,1894],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/40191"}],"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=40191"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/40191\/revisions"}],"predecessor-version":[{"id":40192,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/40191\/revisions\/40192"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}