{"id":13731,"date":"2017-10-03T23:17:46","date_gmt":"2017-10-03T21:17:46","guid":{"rendered":"http:\/\/karmaka.de\/?p=13731"},"modified":"2017-10-03T23:18:46","modified_gmt":"2017-10-03T21:18:46","slug":"taking-the-pulse-of-mars-via-dating-of-a-plume-fed-volcano","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=13731","title":{"rendered":"Taking the pulse of Mars via dating of a plume-fed volcano<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>Benjamin E. Cohen, Darren F. Mark, William S. Cassata, Martin R. Lee, Tim Tomkinson &#038; Caroline L. Smith<\/p>\n<p>Nature Communications 8, Article number: 640 (2017)<br \/>\ndoi:10.1038\/s41467-017-00513-8<\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-017-00513-8\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br \/>\n<a href=\"https:\/\/www.nature.com\/articles\/s41467-017-00513-8.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n<p>&#8220;Mars hosts the solar system\u2019s largest volcanoes. Although their size and impact crater density indicate continued activity over billions of years, their formation rates are poorly understood. Here we quantify the growth rate of a Martian volcano by 40Ar\/39Ar and cosmogenic exposure dating of six nakhlites, meteorites that were ejected from Mars by a single impact event at 10.7\u2009\u00b1\u20090.8\u2009Ma (2\u03c3). We find that the nakhlites sample a layered volcanic sequence with at least four discrete eruptive events spanning 93\u2009\u00b1\u200912\u2009Ma (1416\u2009\u00b1\u20097\u2009Ma to 1322\u2009\u00b1\u200910\u2009Ma (2\u03c3)). A non-radiogenic trapped 40Ar\/36Ar value of 1511\u2009\u00b1\u200974 (2\u03c3) provides a precise and robust constraint for the mid-Amazonian Martian atmosphere. Our data show that the nakhlite-source volcano grew at a rate of ca. 0.4\u20130.7\u2009m\u2009Ma\u22121\u2014three orders of magnitude slower than comparable volcanoes on Earth, and necessitating that Mars was far more volcanically active earlier in its history.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Benjamin E. Cohen, Darren F. Mark, William S. Cassata, Martin R. Lee, Tim Tomkinson &#038; Caroline L. Smith Nature Communications 8, Article number: 640 (2017) doi:10.1038\/s41467-017-00513-8 LINK (OPEN ACCESS) PDF (OPEN ACCESS) &#8220;Mars hosts the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[122,42,44],"tags":[93,1849,634,638,383,640,4221,1634],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13731"}],"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=13731"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13731\/revisions"}],"predecessor-version":[{"id":13732,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13731\/revisions\/13732"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}