{"id":25321,"date":"2020-11-16T15:29:54","date_gmt":"2020-11-16T14:29:54","guid":{"rendered":"http:\/\/karmaka.de\/?p=25321"},"modified":"2021-01-26T08:28:36","modified_gmt":"2021-01-26T07:28:36","slug":"origin-of-isolated-olivine-grains-in-carbonaceous-chondrites","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=25321","title":{"rendered":"Origin of isolated olivine grains in carbonaceous chondrites<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Emmanuel Jacquet, Maxime Piralla, Pauline Kersaho, Yves Marrocchi<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>Version of Record online: 16 November 2020<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.13583\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/arxiv.org\/ftp\/arxiv\/papers\/2101\/2101.10073.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;We report microscopic, cathodoluminescence, chemical, and O isotopic measurements of FeO\u2010poor isolated olivine grains (IOG) in the carbonaceous chondrites Allende (CV3), Northwest Africa 5958 (C2\u2010ung), Northwest Africa 11086 (CM2\u2010an), and Allan Hills 77307 (CO3.0). The general petrographic, chemical, and isotopic similarity with bona fide type I chondrules confirms that the IOG derived from them. The concentric CL zoning, reflecting a decrease in refractory elements toward the margins, and frequent rimming by enstatite are taken as evidence of interaction of the IOG with the gas as stand\u2010alone objects. This indicates that they were splashed out of chondrules when these were still partially molten. CaO\u2010rich refractory forsterites, which are restricted to \u220617O &lt;\u22124\u2030 likely escaped equilibration at lower temperatures because of their large size and possibly quicker quenching. The IOG thus bear witness to frequent collisions in the chondrule\u2010forming regions.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Emmanuel Jacquet, Maxime Piralla, Pauline Kersaho, Yves Marrocchi Meteoritics &amp; Planetary ScienceVersion of Record online: 16 November 2020 LINK PDF (OPEN ACCESS) &#8220;We report microscopic, cathodoluminescence, chemical, and O isotopic measurements of FeO\u2010poor isolated olivine&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,56,148,18,19,14,335],"tags":[4307,3273,1839,3705,1864,5568,747,3037],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/25321"}],"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=25321"}],"version-history":[{"count":3,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/25321\/revisions"}],"predecessor-version":[{"id":25791,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/25321\/revisions\/25791"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}