LINK<\/strong><\/a><\/p>\n\n\n\n“High-precision Nd isotope measurements of a diverse set of solar system materials including bulk chondrites and achondrites reveal that their Nd isotope composition is governed by several distinct nucleosynthetic components. The full spectrum of non-radiogenic, mass-independent Nd isotope compositions of solar system materials is best explained by heterogeneous distribution of at least three nucleosynthetic components – the classical s-process component, pure p-process component and an anomalous, previously unidentified s-\/r-process component. The 142Nd\/144Nd variations in solar system reservoirs specifically fall into three distinct trends – those that result from variations in the s-process component, those resulting from variations in the pure p-process component, and those resulting from coupled s-process and p-process variations. The \u03bc148Nd value, a proxy for s-process variations , as well as \u03bc142Nd that has been corrected for s-process heterogeneity to reflect p-process variations, broadly show an inverse correlation with \u220a54Cr. The linearity in \u03bc148Nd – \u220a54Cr space for inner solar system bodies, CI chondrite and Allende-type CAIs possibly suggests the thermally labile nature of some s-process carrier grains unlike the mainstream refractory s-process SiC grains. The p-process carrier for Nd is inferred to be a refractory phase enriched in inner solar system materials through thermal processing. The bulk meteorite regression lines that specifically correspond to s- and p-process heterogeneity, largely define \u03bc142Nd intercepts indistinguishable from terrestrial composition within analytical uncertainty, ruling out resolvable radiogenic \u03bc142Nd excess on Earth that cannot otherwise be accounted for by nucleosynthetic heterogeneity.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Nikitha Susan Saji, Daniel Wielandt, Jesper Christian Holst, Martin Bizzarro Geochimica et Cosmochimica Acta LINK “High-precision Nd isotope measurements of a diverse set of solar system materials including bulk chondrites and achondrites reveal that their…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,10,72,112,71],"tags":[1171,4819,4083,948,1572,397,5313,1850],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22066"}],"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=22066"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22066\/revisions"}],"predecessor-version":[{"id":22067,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22066\/revisions\/22067"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}