{"id":38223,"date":"2025-05-13T16:19:30","date_gmt":"2025-05-13T14:19:30","guid":{"rendered":"https:\/\/karmaka.de\/?p=38223"},"modified":"2025-05-13T16:19:32","modified_gmt":"2025-05-13T14:19:32","slug":"the-bright-field-grinding-tomography-of-coarse-grained-calcium%e2%80%91aluminum-rich-inclusions-in-the-allende-meteorite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=38223","title":{"rendered":"The bright-field grinding tomography of coarse-grained calcium\u2011aluminum-rich inclusions in the Allende meteorite"},"content":{"rendered":"\n<p>Ryota Fukai, Yusuke Takeda, Yuki Masuda, Daiki Yamamoto, Yasuhiro Iba, Shintaro Sasaki, Shin Ikegami, Aya Kubota, Reo Sato, Tomohiro Usui<\/p>\n\n\n\n<p>Icarus<br>Available online 12 May 2025, 116648<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0019103525001952\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<ul>\n<li>We visualized 10 coarse-grained CAIs (CG-CAIs) of the Allende meteorite in a colorized 3D model with high spatial resolution.<\/li>\n\n\n\n<li>An angular-shaped CG-CAI&#8217;s surface indicates that this CAI was fragmented before accretion to the parent body.<\/li>\n\n\n\n<li>A vesicular-shaped CG-CAI indicates that the fracturing and complex formation process occurred before Wark-Lovering rim formation.<\/li>\n\n\n\n<li>The fragmentation of Allende CAIs occurred during the parent body accretion stage and in the protosolar disk.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;The evolution associated with coagulation\/fragmentation processes of dust to planetesimals in the protosolar disk is the critical phase of planet formation in the Solar System. The meteoritic components, such as calcium\u2011aluminum-rich inclusions (CAIs), will provide essential constraints on the coagulation\/fragmentation process in the early stage of the disk. We applied the bright-field grinding tomography method to an Allende meteorite (CV3) slab to visualize the coarse-grained CAIs (CG-CAIs) in a colorized 3D model with high spatial resolution. We found four mm-scale CG-CAIs that experienced deformation and\/or fragmentation processes within ~1.8\u202f\u00d7\u202f103\u202fmm3 Allende slab. An angular-shaped CG-CAI&#8217;s surface showed the anisotropy of red-gray and white sides, which suggests that the fragmentation results in the loss of the primitive Wark-Lovering rim. We also found a vesicular-shaped CG-CAI, which indicates that the fracturing and complex formation process of this CG-CAI likely proceeded prior to the accretion of the Wark-Lovering rim. Our observations reveal that the fragmentation of Allende CAIs occurred during the parent body accretion stage and also in the protosolar disk.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ryota Fukai, Yusuke Takeda, Yuki Masuda, Daiki Yamamoto, Yasuhiro Iba, Shintaro Sasaki, Shin Ikegami, Aya Kubota, Reo Sato, Tomohiro Usui IcarusAvailable online 12 May 2025, 116648 LINK &#8220;Highlights &#8220;The evolution associated with coagulation\/fragmentation processes of&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,9,585,14,57],"tags":[108,1846,3273,4890,1812],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38223"}],"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=38223"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38223\/revisions"}],"predecessor-version":[{"id":38224,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38223\/revisions\/38224"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=38223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=38223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=38223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}