{"id":36780,"date":"2024-09-26T15:08:38","date_gmt":"2024-09-26T13:08:38","guid":{"rendered":"https:\/\/karmaka.de\/?p=36780"},"modified":"2024-09-26T15:08:39","modified_gmt":"2024-09-26T13:08:39","slug":"evidence-from-162173-ryugu-for-the-influence-of-freeze-thaw-on-the-hydration-of-asteroids","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36780","title":{"rendered":"Evidence from 162173 Ryugu for the influence of freeze\u2013thaw on the hydration of asteroids<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Matthew J. Genge, Natasha V. Almeida, Matthias van Ginneken, Lewis Pinault, Penelope J. Wozniakiewicz &amp; Hajime Yano<\/p>\n\n\n\n<p>Nature Astronomy, Published: 26 September 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02369-7\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02369-7.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Hydrated asteroids are likely to be main source of water for the terrestrial planets. The controls on the extent of asteroid hydration, however, are poorly understood. Here we report the discovery of multiple fracture and vein sets in a sample from the C-type asteroid 162173 Ryugu that acted as pathways for the migration of distal fluids during its aqueous alteration. Early veins in Ryugu are decorated with framboidal magnetite, while later veins caused metasomatism of wall rocks. Both veins and fractures have cuspate geometries and complex intersecting geometries consistent with freeze\u2013thaw fractures formed during experiments. We show that freeze\u2013thaw is effective in fracturing C-type asteroids to up to 300\u2009km in diameter and is thus crucial in the outwards migration of fluids in ice-bearing asteroids. Freeze\u2013thaw is likely, therefore, to determine the distribution of mineral-hosted water in asteroids throughout the Cosmos.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Matthew J. Genge, Natasha V. Almeida, Matthias van Ginneken, Lewis Pinault, Penelope J. Wozniakiewicz &amp; Hajime Yano Nature Astronomy, Published: 26 September 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Hydrated asteroids are likely to be main&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,77,2350,2243,1184,81],"tags":[3872,1842,3991,495,994,1855],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36780"}],"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=36780"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36780\/revisions"}],"predecessor-version":[{"id":36781,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36780\/revisions\/36781"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36780"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36780"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}