{"id":38720,"date":"2025-07-10T00:46:29","date_gmt":"2025-07-09T22:46:29","guid":{"rendered":"https:\/\/karmaka.de\/?p=38720"},"modified":"2025-07-10T00:46:31","modified_gmt":"2025-07-09T22:46:31","slug":"geology-and-mars-analog-potential-of-the-2-7-billion-year-old-miralga-impact-structure-north-pole-dome-pilbara-craton-australia","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=38720","title":{"rendered":"Geology and Mars analog potential of the &lt;2.7-billion-year-old Miralga impact structure, North Pole Dome, Pilbara Craton, Australia<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Alec R. Brenner,, Aaron J. Cavosie, Jasmine Palma-Gomez, Joanna Li, Sophie-An Kingsbury Lee, and Roger R. Fu<\/p>\n\n\n\n<p>Science Advances<br>9 Jul 2025<br>Vol 11, Issue 28<\/p>\n\n\n\n<p><a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.adu5379\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.science.org\/doi\/epdf\/10.1126\/sciadv.adu5379\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;North Pole Dome (Pilbara Craton, Western Australia) contains unique geological analogs to early Earth and Mars. Recently discovered shatter cones in 3.47-billion-year-old (Ga) rocks reveal that it is also the site of an ancient meteorite impact. Initial reports claimed that the impact occurred at 3.47 Ga and produced a \u2265100\u2013kilometer (km) crater; we show that these age and size estimates are inaccurate. Shatter cones are radially oriented over a 6.5-km\u2013diameter area, defining a 16-km\u2013wide structure. Shatter cones postdate regional structures and occur in younger overlying rocks, providing unambiguous evidence that the impact occurred after ~2.7 Ga. We also report the first shocked mineral from this site, the high-pressure TiO2 polymorph TiO2-II (srilankite). We provisionally name this feature the Miralga impact structure. The 3.47 Ga hydrothermally altered basalts at Miralga are the oldest known shocked terrestrial rocks, highlighting the site\u2019s analog potential for impacts into biosignature-bearing Archean greenstones and the Martian surface.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alec R. Brenner,, Aaron J. Cavosie, Jasmine Palma-Gomez, Joanna Li, Sophie-An Kingsbury Lee, and Roger R. Fu Science Advances9 Jul 2025Vol 11, Issue 28 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;North Pole Dome (Pilbara Craton, Western&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90,122],"tags":[92,1858,6918,1266],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38720"}],"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=38720"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38720\/revisions"}],"predecessor-version":[{"id":38721,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/38720\/revisions\/38721"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=38720"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=38720"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=38720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}