{"id":32995,"date":"2023-03-28T13:50:11","date_gmt":"2023-03-28T12:50:11","guid":{"rendered":"https:\/\/karmaka.de\/?p=32995"},"modified":"2023-03-28T13:50:14","modified_gmt":"2023-03-28T12:50:14","slug":"in-situ-oxygen-magnesium-and-silicon-isotopic-compositions-of-the-fun-inclusion-vigarano-1623-5","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=32995","title":{"rendered":"In situ oxygen, magnesium, and silicon isotopic compositions of the FUN inclusion Vigarano 1623-5<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Johanna Marin-Carbonne, Kevin D. McKeegan, Andrew M. Davis, Glenn J. MacPherson, Ruslan A. Mendybaev, Frank M. Richter<\/p>\n\n\n\n<p>MAPS<br>Version of Record online: 27 March 2023<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.13971\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.13971\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Oxygen, magnesium, and silicon isotopic abundances in Vigarano 1623-5 were studied using secondary ion mass spectrometry to investigate correlations between isotopic and petrologic properties of this unique forsterite-bearing FUN inclusion. Vigarano 1623-5 displays large, correlated mass-dependent fractionation effects, tightly linked to mineralogy within distinct petrologic units of the inclusion. The pyroxene-rich and melilite-rich interior parts of the inclusion display highly mass-fractionated isotopic compositions of oxygen, magnesium, and silicon, consistent with Rayleigh distillation during evaporation of a melt with initial oxygen composition close to a solar composition. However, the chemical composition, enriched in magnesium and silicon, suggests a precursor already fractionated by prior melt evaporation. A discontinuous igneous rim was produced by a flash-melting event followed by isotopic exchange in the rim melilite with planetary-like oxygen, mechanical fragmentation, and reassembly with an accretionary rim of heterogeneous materials. Al-rich minerals in 1623-5 show evidence for having crystallized with live 26Al but at less than the \u201ccanonical\u201d level of most CV calcium-aluminum-rich inclusions. However, well-defined 26Al-26Mg isochrons are not found and temporal implications are ambiguous.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Johanna Marin-Carbonne, Kevin D. McKeegan, Andrew M. Davis, Glenn J. MacPherson, Ruslan A. Mendybaev, Frank M. Richter MAPSVersion of Record online: 27 March 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Oxygen, magnesium, and silicon isotopic abundances&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,9,14,3064],"tags":[332,1846,3273,1812,136,2227,1845,971,482],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/32995"}],"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=32995"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/32995\/revisions"}],"predecessor-version":[{"id":32996,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/32995\/revisions\/32996"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=32995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=32995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=32995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}