{"id":140,"date":"2014-10-10T08:00:30","date_gmt":"2014-10-10T06:00:30","guid":{"rendered":"http:\/\/karmaka.de\/?p=140"},"modified":"2014-10-21T10:53:26","modified_gmt":"2014-10-21T08:53:26","slug":"calcium-48-isotopic-anomalies-in-bulk-chondrites-and-achondrites-evidence-for-a-uniform-isotopic-reservoir-in-the-inner-protoplanetary-disk","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=140","title":{"rendered":"Calcium-48 isotopic anomalies in bulk chondrites and achondrites: Evidence for a uniform isotopic reservoir in the inner protoplanetary disk"},"content":{"rendered":"<p>Nicolas Dauphas, James H. Chen, Junjun Zhang, Dimitri A. Papanastassiou, Andrew M. Davis, Claudia Travaglio<\/p>\n<p>Earth and Planetary Science Letters<br \/>\nVolume 407, 1 December 2014, Pages 96\u2013108<\/p>\n<p><a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0012821X14005706\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<blockquote><p>The Earth has identical <sup>48<\/sup>Ca isotopic composition to enstatite chondrites (EH and EL) and aubrites. This adds to a long list of elements that display nucleosynthetic anomalies at a bulk planetary scale but show identical or very similar isotopic compositions between enstatite chondrites, aubrites, and Earth. This suggests that the inner protoplanetary disk was characterized by a uniform isotopic composition (IDUR for Inner Disk Uniform Reservoir), sampled by enstatite chondrites and aubrites, from which the Earth drew most of its constituents. The terrestrial isotopic composition for <sup>17<\/sup>O, <sup>48<\/sup>Ca, <sup>50<\/sup>Ti, <sup>62<\/sup>Ni, and <sup>92<\/sup>Mo is well reproduced by a mixture of 91% enstatite, 7% ordinary, and 2% carbonaceous chondrites. The Earth was not simply made of enstatite chondrites but it formed from the same original material that was later modified by nebular and disk processes. The Moon-forming impactor probably came from the same region as the other embryos that made the Earth, explaining the strong isotopic similarity between lunar and terrestrial rocks.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Nicolas Dauphas, James H. Chen, Junjun Zhang, Dimitri A. Papanastassiou, Andrew M. Davis, Claudia Travaglio Earth and Planetary Science Letters Volume 407, 1 December 2014, Pages 96\u2013108 LINK The Earth has identical 48Ca isotopic composition&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,112,25,26,17,65],"tags":[124,1826,80,1817,1818,1813,126,125],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/140"}],"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=140"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/140\/revisions"}],"predecessor-version":[{"id":141,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/140\/revisions\/141"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}