{"id":21456,"date":"2020-02-12T22:05:48","date_gmt":"2020-02-12T21:05:48","guid":{"rendered":"http:\/\/karmaka.de\/?p=21456"},"modified":"2020-02-12T22:37:23","modified_gmt":"2020-02-12T21:37:23","slug":"iron-isotope-evidence-for-very-rapid-accretion-and-differentiation-of-the-proto-earth","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=21456","title":{"rendered":"Iron isotope evidence for very rapid accretion and differentiation of the proto-Earth<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Martin Schiller, Martin Bizzarro, and Julien Siebert<\/p>\n\n\n\n<p>Science Advances  12 Feb 2020:<br>\nVol. 6, no. 7, eaay7604<br>\nDOI: 10.1126\/sciadv.aay7604 <\/p>\n\n\n\n<p><a href=\"https:\/\/advances.sciencemag.org\/content\/6\/7\/eaay7604\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br>\n<a href=\"https:\/\/advances.sciencemag.org\/content\/advances\/6\/7\/eaay7604.full.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Nucleosynthetic isotope variability among solar system objects provides insights into the accretion history of terrestrial planets. We report on the nucleosynthetic Fe isotope composition (\u03bc54Fe) of various meteorites and show that the only material matching the terrestrial composition is CI (Ivuna-type) carbonaceous chondrites, which represent the bulk solar system composition. All other meteorites, including carbonaceous, ordinary, and enstatite chondrites, record excesses in \u03bc54Fe. This observation is inconsistent with protracted growth of Earth by stochastic collisional accretion, which predicts a \u03bc54Fe value reflecting a mixture of the various meteorite parent bodies. Instead, our results suggest a rapid accretion and differentiation of Earth during the ~5\u2013million year disk lifetime, when the volatile-rich CI-like material is accreted to the proto-Sun via the inner disk.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Martin Schiller, Martin Bizzarro, and Julien Siebert Science Advances 12 Feb 2020: Vol. 6, no. 7, eaay7604 DOI: 10.1126\/sciadv.aay7604 LINK (OPEN ACCESS) PDF (OPEN ACCESS) &#8220;Nucleosynthetic isotope variability among solar system objects provides insights into&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[131,10,922,112],"tags":[1809,2001,1926,734,5450,5451],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21456"}],"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=21456"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21456\/revisions"}],"predecessor-version":[{"id":21457,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21456\/revisions\/21457"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}