{"id":33953,"date":"2023-07-06T21:31:34","date_gmt":"2023-07-06T19:31:34","guid":{"rendered":"https:\/\/karmaka.de\/?p=33953"},"modified":"2023-07-06T21:31:35","modified_gmt":"2023-07-06T19:31:35","slug":"i-pu-reveals-earth-mainly-accreted-from-volatile-poor-differentiated-planetesimals","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=33953","title":{"rendered":"I\/Pu reveals Earth mainly accreted from volatile-poor differentiated planetesimals<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Weiyi Liu, Yigang Zhang, Fran\u00e7ois. L. H. Tissot, Guillaume Avice, Zhilin Ye, and Qing-Zhu Yin<\/p>\n\n\n\n<p>Science Advances<br>5 Jul 2023<br>Vol 9, Issue 27<\/p>\n\n\n\n<p><a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.adg9213\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.science.org\/doi\/epdf\/10.1126\/sciadv.adg9213\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The observation that mid-ocean ridge basalts had ~3\u00d7 higher iodine\/plutonium ratios (inferred from xenon isotopes) compared to ocean island basalts holds critical insights into Earth\u2019s accretion. Understanding whether this difference stems from core formation alone or heterogeneous accretion is, however, hindered by the unknown geochemical behavior of plutonium during core formation. Here, we use first-principles molecular dynamics to quantify the metal-silicate partition coefficients of iodine and plutonium during core formation and find that both iodine and plutonium partly partition into metal liquid. Using multistage core formation modeling, we show that core formation alone is unlikely to explain the iodine\/plutonium difference between mantle reservoirs. Instead, our results reveal a heterogeneous accretion history, whereby predominant accretion of volatile-poor differentiated planetesimals was followed by a secondary phase of accretion of volatile-rich undifferentiated meteorites. This implies that Earth inherited part of its volatiles, including its water, from late accretion of chondrites, with a notable carbonaceous chondrite contribution.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Weiyi Liu, Yigang Zhang, Fran\u00e7ois. L. H. Tissot, Guillaume Avice, Zhilin Ye, and Qing-Zhu Yin Science Advances5 Jul 2023Vol 9, Issue 27 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;The observation that mid-ocean ridge basalts had ~3\u00d7&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74,9,112,73,81],"tags":[3273,80,2001,3152,369,1855],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33953"}],"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=33953"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33953\/revisions"}],"predecessor-version":[{"id":33954,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33953\/revisions\/33954"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}