{"id":11389,"date":"2017-02-01T20:54:53","date_gmt":"2017-02-01T19:54:53","guid":{"rendered":"http:\/\/karmaka.de\/?p=11389"},"modified":"2017-02-01T22:09:13","modified_gmt":"2017-02-01T21:09:13","slug":"two-billion-years-of-magmatism-recorded-from-a-single-mars-meteorite-ejection-site","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=11389","title":{"rendered":"Two billion years of magmatism recorded from a single Mars meteorite ejection site<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>Thomas J. Lapen, Minako Righter, Rasmus Andreasen, Anthony J. Irving, Aaron M. Satkoski, Brian L. Beard, Kunihiko Nishiizumi, A. J. Timothy Jull, Marc W. Caffee<\/p>\n<p>Science Advances  01 Feb 2017:<br \/>\nVol. 3, no. 2, e1600922<br \/>\nDOI: 10.1126\/sciadv.1600922 <\/p>\n<p><a href=\"http:\/\/advances.sciencemag.org\/content\/advances\/3\/2\/e1600922.full.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><br \/>\n<a href=\"http:\/\/advances.sciencemag.org\/content\/3\/2\/e1600922\" target=\"_blank\"><strong>abstract<\/strong><\/a><\/p>\n<p>&#8220;The timing and nature of igneous activity recorded at a single Mars ejection site can be determined from the isotope analyses of Martian meteorites. Northwest Africa (NWA) 7635 has an Sm-Nd crystallization age of 2.403 \u00b1 0.140 billion years, and isotope data indicate that it is derived from an incompatible trace element\u2013depleted mantle source similar to that which produced a geochemically distinct group of 327- to 574-million-year-old \u201cdepleted\u201d shergottites. Cosmogenic nuclide data demonstrate that NWA 7635 was ejected from Mars 1.1 million years ago (Ma), as were at least 10 other depleted shergottites. The shared ejection age is consistent with a common ejection site for these meteorites. The spatial association of 327- to 2403-Ma depleted shergottites indicates >2 billion years of magmatism from a long-lived and geochemically distinct volcanic center near the ejection site.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thomas J. Lapen, Minako Righter, Rasmus Andreasen, Anthony J. Irving, Aaron M. Satkoski, Brian L. Beard, Kunihiko Nishiizumi, A. J. Timothy Jull, Marc W. Caffee Science Advances 01 Feb 2017: Vol. 3, no. 2, e1600922&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[523,122,42,43],"tags":[1884,3573,557,3571,1858,1828,3572,2385],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/11389"}],"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=11389"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/11389\/revisions"}],"predecessor-version":[{"id":11391,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/11389\/revisions\/11391"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}