{"id":34622,"date":"2023-12-14T15:23:30","date_gmt":"2023-12-14T14:23:30","guid":{"rendered":"https:\/\/karmaka.de\/?p=34622"},"modified":"2023-12-14T15:23:32","modified_gmt":"2023-12-14T14:23:32","slug":"analysis-of-layered-boulders-on-asteroid-101955-bennu-and-their-implications-for-fluid-flow-on-the-parent-body","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=34622","title":{"rendered":"Analysis of layered boulders on asteroid (101955) Bennu and their implications for fluid flow on the parent body<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>K. Ishimaru, D. S. Lauretta<\/p>\n\n\n\n<p>MAPS, Version of Record online: 14 December 2023<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.14115\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.14115\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The observation of carbonate veins on asteroid Bennu supports the idea that large-scale water flow may have occurred in carbonaceous asteroids in the early solar system. We identified and analyzed 11 boulders with layered structures on asteroid Bennu&#8217;s surface using high-resolution (centimeter-scale) image and altimetry data obtained by the OSIRIS-REx mission. The boulders&#8217; linear layer boundaries and parallel bedding follow the principle of original horizontality and suggest that they formed from sediment deposition by fluid flow on Bennu&#8217;s parent body. We developed a simple model of the parent body (100-km diameter with the density of CM chondrite material) and found that the water flow velocity had to be at least 21.1\u2009cm\u2009s\u22121 to transport the largest clast observed embedded in a layered rock, which is 85\u2009cm in average length. The flow velocity could have been as high as 26.5\u2009cm\u2009s\u22121 if a larger clast observed on top of a layered rock was once embedded therein. Our results strongly support open-system aqueous alteration on carbonaceous chondrite parent bodies.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>K. Ishimaru, D. S. Lauretta MAPS, Version of Record online: 14 December 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;The observation of carbonate veins on asteroid Bennu supports the idea that large-scale water flow may have&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,77,9,552],"tags":[5719,1842,1854,1771,2058,3274,3273,3275,4844,701,1886],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34622"}],"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=34622"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34622\/revisions"}],"predecessor-version":[{"id":34623,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34622\/revisions\/34623"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}