{"id":36892,"date":"2024-11-07T07:42:52","date_gmt":"2024-11-07T05:42:52","guid":{"rendered":"https:\/\/karmaka.de\/?p=36892"},"modified":"2024-11-07T07:42:53","modified_gmt":"2024-11-07T05:42:53","slug":"dating-recent-aqueous-activity-on-mars","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36892","title":{"rendered":"Dating recent aqueous activity on Mars<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>M.M. Tremblay, D.F. Mark, D.N. Barfod, B.E. Cohen, R.B. Ickert, M.R. Lee, T. Tomkinson, C.L. Smith<\/p>\n\n\n\n<p>Geochemical Perspectives Letters v32<br>Published 6 November 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/www.geochemicalperspectivesletters.org\/article2443\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.geochemicalperspectivesletters.org\/documents\/GPL2443_SI.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Amazonian-age Martian meteorites contain products of indigenous aqueous alteration; yet, establishing when this alteration occurred, and therefore when liquid water was available in the planet\u2019s crust, has proven challenging. New 40Ar\/39Ar dates for iddingsite within the Martian meteorite Lafayette show these minerals precipitated from liquid water at 742\u2009\u00b1\u200915 Ma (2\u03c3). This age is the most precise constraint to date on water\u2013rock interaction on Mars, and postdates formation of the host igneous rock by \u223c580 Myr. We infer that magmatic activity most likely induced melting of local permafrost and led to alteration of the nakhlites, suggesting that activation of localised hydrological cycles on Amazonian Mars by magmatism was infrequent and transient, but not unusual.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M.M. Tremblay, D.F. Mark, D.N. Barfod, B.E. Cohen, R.B. Ickert, M.R. Lee, T. Tomkinson, C.L. Smith Geochemical Perspectives Letters v32Published 6 November 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Amazonian-age Martian meteorites contain products of indigenous&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,122,44],"tags":[93,3200,1465,1842,634,1858,1830],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36892"}],"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=36892"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36892\/revisions"}],"predecessor-version":[{"id":36893,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36892\/revisions\/36893"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}