LINK<\/strong><\/a><\/p>\n\n\n\n“The widespread occurrence of ferroan anorthosites and other magmatic rock types in Apollo lunar samples directly contributed to the construction and development of modern planetary formation models. If the Vesta magma ocean (VMO) model is analogous to the lunar magma ocean model, anorthosites should be present as a late crystallization product of the Vesta magma ocean. However, the lack of anorthositic meteorites unequivocally linked to Vesta or its parent body casts doubts on the existence of a past VMO and to our knowledge of Vesta\u2019s formation and early evolution. Here, we report a newly discovered ferroan anorthosite, Northwest Africa 15118, consisting entirely of anorthite (~94\u2009vol%) and orthopyroxene (~6\u2009vol%). We show that the mineral chemical compositions, whole-rock oxygen isotope composition (\u039417O\u2009=\u2009\u22120.243\u2009\u00b1\u20090.014\u2030), as well as chromium isotope composition in chromite (\u03b554Cr\u2009=\u2009\u22120.74\u2009\u00b1\u20090.14), of Northwest Africa 15118 overlaps with howardite\u2013eucrite\u2013diogenite meteorites, indicating a Vestan origin for this meteorite. The occurrence of ferroan anorthosite with prominent positive Eu anomalies supports a primary anorthositic crust layer in Vesta, thus validating the VMO model.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Shijie Li, Dongliang Zhang, Qiao Shu, Huiming Bao, Xiaobin Cao, Jia Liu, Liping Qin, Yan Fan, Shenghua Zhou, Dehan Shen & Mingbao Li Nature Astronomy LINK “The widespread occurrence of ferroan anorthosites and other magmatic…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,33,507,186],"tags":[2541,4932,212,2336,6641,2285,1872,5910],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/35969"}],"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=35969"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/35969\/revisions"}],"predecessor-version":[{"id":35970,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/35969\/revisions\/35970"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=35969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=35969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=35969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}