{"id":41736,"date":"2026-05-31T20:30:12","date_gmt":"2026-05-31T18:30:12","guid":{"rendered":"https:\/\/karmaka.de\/?p=41736"},"modified":"2026-05-31T20:30:13","modified_gmt":"2026-05-31T18:30:13","slug":"when-wet-meets-dry-an-ivuna-like-impactor-triggered-volatile-loss-on-the-angrite-parent-body","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=41736","title":{"rendered":"When wet meets dry: An Ivuna-like impactor triggered volatile loss on the angrite parent body<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Ke Zhu (\u6731\u67ef), Qi Chen, Tetsuya Yokoyama, Akira Yamaguchi, Audrey Bouvier, and Lu Chen<\/p>\n\n\n\n<p>Science Advances<br>29 May 2026<br>Vol 12, Issue 22<\/p>\n\n\n\n<p><a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.aeb1432\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.science.org\/doi\/epdf\/10.1126\/sciadv.aeb1432\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Angrite meteorites remain the \u201cdriest\u201d known planetary materials in the Solar System. Recent mineralogical and oxygen (O) isotope data suggest that the angrite parent body (APB) experienced a major impact, raising questions about the identity of the impactor. We report high-precision mass-independent chromium (\u03b554Cr) isotope data for eight angrites and their components. Samples from deeper APB regions exhibit uniform \u03b554Cr values (\u22120.40 \u00b1 0.03), representing the mantle composition, whereas matrix materials from quenched angrites show anomalous \u03b554Cr values (0.27 \u00b1 0.06 and \u22120.15 \u00b1 0.08), likely reflecting impactor contamination. Combined Cr-O isotope data point to a CI (Ivuna-type) chondritic impactor\u2014the \u201cwettest\u201d known Solar System material. Although such an impact could introduce volatiles, high-energy conditions likely caused extensive volatile loss, preserving the angrites\u2019 dry nature. CI contamination may also make quenched angrites unsuitable time anchors for siderophile short-lived chronometers, whereas the other \u201ccontamination-free\u201d angrites yield a precise age of 4561.0 \u00b1 0.9 million years, dating the formation of their mantle source.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ke Zhu (\u6731\u67ef), Qi Chen, Tetsuya Yokoyama, Akira Yamaguchi, Audrey Bouvier, and Lu Chen Science Advances29 May 2026Vol 12, Issue 22 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Angrite meteorites remain the \u201cdriest\u201d known planetary materials in&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,9,10,137],"tags":[7151,7150,108,1072,1825,1208,3273,3363,1809,5832,763,2660,2343,734,7149,2436,6024,7147,977,4059,5425,7148,3936,683],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/41736"}],"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=41736"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/41736\/revisions"}],"predecessor-version":[{"id":41737,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/41736\/revisions\/41737"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}