{"id":16784,"date":"2018-11-15T16:25:17","date_gmt":"2018-11-15T15:25:17","guid":{"rendered":"http:\/\/karmaka.de\/?p=16784"},"modified":"2018-11-15T16:26:02","modified_gmt":"2018-11-15T15:26:02","slug":"martian-magmatism-from-plume-metasomatized-mantle","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=16784","title":{"rendered":"Martian magmatism from plume metasomatized mantle<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>James M. D. Day, Kimberly T. Tait, Arya Udry, Fr\u00e9d\u00e9ric Moynier, Yang Liu &#038; Clive R. Neal <\/p>\n<p>Nature Communications<br \/>\nVolume 9, Article number: 4799 (2018)<br \/>\nPublished: 15 November 2018<\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-018-07191-0\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br \/>\n<a href=\"https:\/\/www.nature.com\/articles\/s41467-018-07191-0.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n<p>&#8220;Direct analysis of the composition of Mars is possible through delivery of meteorites to Earth. Martian meteorites include \u223c165 to 2400\u2009Ma shergottites, originating from depleted to enriched mantle sources, and \u223c1340\u2009Ma nakhlites and chassignites, formed by low degree partial melting of a depleted mantle source. To date, no unified model has been proposed to explain the petrogenesis of these distinct rock types, despite their importance for understanding the formation and evolution of Mars. Here we report a coherent geochemical dataset for shergottites, nakhlites and chassignites revealing fundamental differences in sources. Shergottites have lower Nb\/Y at a given Zr\/Y than nakhlites or chassignites, a relationship nearly identical to terrestrial Hawaiian main shield and rejuvenated volcanism. Nakhlite and chassignite compositions are consistent with melting of hydrated and metasomatized depleted mantle lithosphere, whereas shergottite melts originate from deep mantle sources. Generation of martian magmas can be explained by temporally distinct melting episodes within and below dynamically supported and variably metasomatized lithosphere, by long-lived, static mantle plumes.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>James M. D. Day, Kimberly T. Tait, Arya Udry, Fr\u00e9d\u00e9ric Moynier, Yang Liu &#038; Clive R. Neal Nature Communications Volume 9, Article number: 4799 (2018) Published: 15 November 2018 LINK (OPEN ACCESS) PDF (OPEN ACCESS)&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45,42,44,43],"tags":[1831,1828,1830,1829],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16784"}],"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=16784"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16784\/revisions"}],"predecessor-version":[{"id":16786,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16784\/revisions\/16786"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16784"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16784"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}