LINK<\/strong><\/a> <\/p>\n\n\n\n“Calcium isotopes have the potential to explore genetic links between the Moon and Earth. Here, we constrain calcium isotopic composition of the bulk silicate Moon (BSM), using petrological, geochemical and calcium isotopic data obtained from five lunar meteorites (two basalts and three feldspathic breccia rocks), and on four anorthite crystals from two feldspathic breccia meteorites. The \u03b444\/40Ca of lunar feldspathic breccias are 0.76 \u00b1 0.06\u2030 (2SD, n=3), 0.78 \u00b1 0.10\u2030 (2SD, n=6) and 0.82 \u00b1 0.02\u2030 (2SD, n=3), respectively, consistent with previously determined calcium isotopic composition of feldspathic breccias. Four anorthite crystals yield a mean \u03b444\/40Ca value of 0.75 \u00b1 0.13\u2030 (2SD, n=4), inferred to represent the \u03b444\/40Ca value of the lunar crust. The \u03b444\/40Ca values of the two lunar basalts are 0.90 \u00b1 0.07\u2030 (2SD,n=3) and 0.96 \u00b1 0.11\u2030 (2SD, n=4), respectively, slightly heavier than the feldspathic breccias and anorthites. The \u03b444\/40Ca of the studied lunar basalts and literature data show negative correlations with CaO, Al2O3, and anorthite mode, pointing to the effect of contamination by lunar crust rocks. Using the heaviest \u03b444\/40Ca found in the least contaminated lunar basalts and a 0.10\u20130.20\u2030 fractionation of calcium isotopes during partial melting, we estimate the \u03b444\/40Ca value of the lunar mantle to be 0.96-1.11\u2030. The \u03b444\/40Ca values of the BSM is estimated to be 0.89-0.95\u2030, using a two-end member mixing model. The Ca isotopic composition of the BSM is within error to that of the bulk silicate Earth (0.94 \u00b1 0.05\u2030), providing insights into the information of the comparison of the Earth-Moon system and the planets of inner Solar System.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Wei Wu, Yi-Gang Xu, Zhao-Feng Zhang, XinLi Geochimica et Cosmochimica Acta LINK “Calcium isotopes have the potential to explore genetic links between the Moon and Earth. Here, we constrain calcium isotopic composition of the bulk…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41,115],"tags":[5318,4381,1827,2238,2745,1340,1857],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20922"}],"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=20922"}],"version-history":[{"count":4,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20922\/revisions"}],"predecessor-version":[{"id":21046,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20922\/revisions\/21046"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}