{"id":42210,"date":"2026-07-19T10:23:56","date_gmt":"2026-07-19T08:23:56","guid":{"rendered":"https:\/\/karmaka.de\/?p=42210"},"modified":"2026-07-19T10:23:57","modified_gmt":"2026-07-19T08:23:57","slug":"refractory-inclusions-in-bennu-samples-indicative-of-outer-solar-system-accretion","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=42210","title":{"rendered":"Refractory inclusions in Bennu samples indicative of outer Solar System accretion<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Noriyuki Kawasaki, Toru Matsumoto, Sota Arakawa, Naoya Sakamoto, Ken-ichi Bajo, Sara S. Russell, Jessica J. Barnes, Ann N. Nguyen, Timothy J. McCoy, Pierre Haenecour, Hisayoshi Yurimoto, Harold C. Connolly Jr. &amp; Dante S. Lauretta<\/p>\n\n\n\n<p>Nature Communications, Published: 18 July 2026<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-026-73868-6\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s41467-026-73868-6_reference.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;NASA\u2019s OSIRIS-REx mission returned material from the carbonaceous asteroid Bennu, which is dominated by aqueous-alteration products but preserves rare high-temperature components. Here we present an integrated petrographic, oxygen-isotopic and 26Al\u201326Mg chronological characterization of refractory inclusions in Bennu samples. All identified inclusions are small (&lt;~100\u2009\u00b5m) and commonly preserve mineralogical evidence of in situ aqueous alteration, indicating incorporation into Bennu\u2019s parent body prior to hydration. Their mineralogical characteristics and oxygen-isotopic and 26Al\u201326Mg systematics demonstrate formation during the earliest stage of Solar System evolution and genetic affinity with refractory inclusions in asteroid Ryugu samples and chondritic meteorites. The shared refractory-inclusion signatures across diverse chondritic materials are consistent with widespread outward transport and mixing of early-formed inner-disk solids. In Bennu samples analyzed thus far, large (&gt;submillimeter) refractory inclusions are absent, in contrast to most carbonaceous chondrites. This size distribution implies that Bennu\u2019s constituents accreted in the outer Solar System beyond the pressure bump associated with proto-Jupiter, which effectively filtered distinct dust populations.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Noriyuki Kawasaki, Toru Matsumoto, Sota Arakawa, Naoya Sakamoto, Ken-ichi Bajo, Sara S. Russell, Jessica J. Barnes, Ann N. Nguyen, Timothy J. McCoy, Pierre Haenecour, Hisayoshi Yurimoto, Harold C. Connolly Jr. &amp; Dante S. Lauretta Nature&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[685,61,77,66,2243,552,65,57],"tags":[5719,3872,5830,1635,1891,1842,1854,1886,135,5556],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42210"}],"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=42210"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42210\/revisions"}],"predecessor-version":[{"id":42211,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42210\/revisions\/42211"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=42210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=42210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=42210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}