{"id":22779,"date":"2020-07-27T12:30:59","date_gmt":"2020-07-27T10:30:59","guid":{"rendered":"http:\/\/karmaka.de\/?p=22779"},"modified":"2020-07-27T12:31:05","modified_gmt":"2020-07-27T10:31:05","slug":"back%e2%80%90transformation-mechanisms-of-ringwoodite-and-majorite-in-an-ordinary-chondrite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=22779","title":{"rendered":"Back\u2010transformation mechanisms of ringwoodite and majorite in an ordinary chondrite"},"content":{"rendered":"\n<p>Kanta Fukimoto, Masaaki Miyahara, Takeshi Sakai, Hiroaki Ohfuji, Naotaka Tomioka, Yu Kodama, Eiji Ohtani, Akira Yamaguchi<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>Version of Record online: 27 July 2020<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.13543\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;We investigated the back\u2010transformation mechanisms of ringwoodite and majorite occurring in a shock\u2010melt vein (SMV) of the Yamato 75267 H6 ordinary chondrite during atmospheric entry heating. Ringwoodite and majorite in the shock melt near the fusion crust have back\u2010transformed into olivine and enstatite, respectively. Ringwoodite (Fa~18) occurs in the SMV as a fine\u2010grained polycrystalline assemblage. Approaching the fusion crust, fine\u2010grained polycrystalline olivine becomes dominant instead of ringwoodite. The back\u2010transformation from ringwoodite to olivine proceeds by incoherent nucleation and by an interface\u2010controlled growth mechanism: nucleation occurs on the grain boundaries of ringwoodite, and subsequently olivine grains grow. Majorite (Fs16\u201317En82\u201383Wo1) occurs in the SMV as a fine\u2010grained polycrystalline assemblage. Approaching the fusion crust, the majorite grains become vitrified. Approaching the fusion crust even more, clino\/orthoenstatite grains occur in the vitrified majorite. The back\u2010transformation from majorite to enstatite is initiated by the vitrification, and growth continues by the subsequent nucleation in the vitrified majorite.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kanta Fukimoto, Masaaki Miyahara, Takeshi Sakai, Hiroaki Ohfuji, Naotaka Tomioka, Yu Kodama, Eiji Ohtani, Akira Yamaguchi Meteoritics &amp; Planetary ScienceVersion of Record online: 27 July 2020 LINK &#8220;We investigated the back\u2010transformation mechanisms of ringwoodite and&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,96,7,63],"tags":[869,5624,551,5622,292,1807,1304,606,5625,5623],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22779"}],"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=22779"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22779\/revisions"}],"predecessor-version":[{"id":22780,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22779\/revisions\/22780"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}