{"id":23955,"date":"2020-09-30T23:10:23","date_gmt":"2020-09-30T21:10:23","guid":{"rendered":"http:\/\/karmaka.de\/?p=23955"},"modified":"2020-09-30T23:10:29","modified_gmt":"2020-09-30T21:10:29","slug":"the-vanadium-isotope-composition-of-mars-implications-for-planetary-differentiation-in-the-early-solar-system","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=23955","title":{"rendered":"The vanadium isotope composition of Mars: implications for planetary differentiation in the early solar system<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>S.G. Nielsen, D.V. Bekaert, T. Magna, K. Mezger, M. Auro<\/p>\n\n\n\n<p>Geochem. Persp. Let. (2020) 15, 35\u201339<\/p>\n\n\n\n<p><a href=\"https:\/\/www.geochemicalperspectivesletters.org\/article2032\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.geochemicalperspectivesletters.org\/documents\/GPL2032_SI.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The V isotope composition of martian meteorites reveals that Bulk Silicate Mars (BSM) is characterised by \u03b451V\u2009=\u2009\u22121.026\u2009\u00b1\u20090.029 \u2030 (2 s.e.) and is thus \u223c0.06 \u2030 heavier than chondrites and \u223c0.17 \u2030 lighter than Bulk Silicate Earth (BSE). Based on the invariant V isotope compositions of all chondrite groups, the heavier V isotope compositions of BSE and BSM relative to chondrites are unlikely to originate from mass independent isotope effects or evaporation\/condensation processes in the early Solar System. These differences are best accounted for by mass dependent fractionation during core formation. Assuming that bulk Earth and Mars both have a chondritic V isotopic compostion, mass balance considerations reveal V isotope fractionation factors \u039451Vcore-mantle as substantial as \u22120.6 \u2030 for both planets. This suggests that V isotope systematics in terrestrial and extraterrestrial rocks potentially constitutes a powerful new tracer of planetary differentiation processes accross the Solar System.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S.G. Nielsen, D.V. Bekaert, T. Magna, K. Mezger, M. Auro Geochem. Persp. Let. (2020) 15, 35\u201339 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;The V isotope composition of martian meteorites reveals that Bulk Silicate Mars (BSM) is&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3180,75,122,42,44,73,43],"tags":[1678,1858,1828,383,2794,1829,414],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/23955"}],"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=23955"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/23955\/revisions"}],"predecessor-version":[{"id":23956,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/23955\/revisions\/23956"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}