{"id":36125,"date":"2024-05-13T13:46:06","date_gmt":"2024-05-13T11:46:06","guid":{"rendered":"https:\/\/karmaka.de\/?p=36125"},"modified":"2024-05-13T13:46:06","modified_gmt":"2024-05-13T11:46:06","slug":"origin-of-fabrics-and-olivine-chemical-variations-preserved-in-brachinite-and-brachinite-like-achondrite-meteorites","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36125","title":{"rendered":"Origin of fabrics and olivine chemical variations preserved in brachinite and brachinite-like achondrite meteorites<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Benjamin H. Gruber, Robert W. Nicklas, James M. D. Day, Emily J. Chin, Minghua Ren, Rachel E. Bernard<\/p>\n\n\n\n<p>MAPS, Version of Record online: 12 May 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.14179\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.14179\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Brachinites and brachinite-like achondrites are olivine-rich meteorites that represent materials after partial metal\u2013silicate differentiation on multiple early Solar System bodies. Both meteorite types show macroscopic textures of olivine crystals, which make up &gt;70 modal percent of their mineralogy. We investigated the orientations of olivine using electron backscatter diffraction (EBSD) and elemental compositions from paired brachinite-like achondrites and one brachinite. The olivine orientations are characterized by a strong concentration of [010] axes with maxima perpendicular to the foliation\/layering and a concentration of [001] axes distributed in a girdle or, in a few samples, as point maxima. Trace element abundances of the olivine in these meteorites determined using laser ablation inductively coupled plasma\u2013mass spectrometry have uniformly low concentrations of sodium (&lt;300\u2009\u03bcg\u2009g\u22121), aluminum (&lt;70\u2009\u03bcg\u2009g\u22121), and titanium (&lt;40\u2009\u03bcg\u2009g\u22121) that are distinct from olivine in chondrites or within terrestrial lavas. Instead, brachinite and brachinite-like olivine compositions broadly overlap those of olivine from melt-depleted mantle lithologies on Earth. Evidence from olivine trace element geochemistry, in conjunction with mineral fabrics, supports that these meteorites formed as melt residues on their host planetary body(ies).&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Benjamin H. Gruber, Robert W. Nicklas, James M. D. Day, Emily J. Chin, Minghua Ren, Rachel E. Bernard MAPS, Version of Record online: 12 May 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Brachinites and brachinite-like achondrites&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,40],"tags":[670,963,292],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36125"}],"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=36125"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36125\/revisions"}],"predecessor-version":[{"id":36126,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36125\/revisions\/36126"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}