{"id":21357,"date":"2020-01-31T17:47:25","date_gmt":"2020-01-31T16:47:25","guid":{"rendered":"http:\/\/karmaka.de\/?p=21357"},"modified":"2020-01-31T17:47:26","modified_gmt":"2020-01-31T16:47:26","slug":"mineralogy-and-petrology-of-the-northwest-africa-12774-angrite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=21357","title":{"rendered":"Mineralogy and Petrology of the Northwest Africa 12774 Angrite"},"content":{"rendered":"\n<p>H. Hayashi, H. Kim, C. Park, T. Mikouchi, V. H. Hoffmann<\/p>\n\n\n\n<p>51st Lunar and Planetary Science Conference (2020), Abstract #2360<\/p>\n\n\n\n<p><a href=\"https:\/\/www.hou.usra.edu\/meetings\/lpsc2020\/pdf\/2360.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Angrite is one of the oldest basaltic achondrites showing unusual chemistry enriched in refractory elements and depleted in volatiles [e.g., 1]. Most angrites show two distinct textures, either \u201cquenched\u201d or \u201cslowly-cooled\u201d. Quenched angrites have older crystallization ages (ca. 4564 Ma) compared to slowly-cooled samples (ca. 4558 Ma), and thus quenched angrites can be good time anchors [e.g., 2]. Until now, 10 quenched angrites are known (LEW (Lewis Cliff) 87051, Asuka-881371\/12209, D\u2019Orbigny, NWA (Northwest Africa) 1296, NWA 1670, NWA 7203, NWA 7812, NWA 12004, NWA 12320 and Sahara 99555). These quenched angrites show ophitic, dendritic or coarse-grained textures perhaps depended upon slight difference of cooling rates [e.g., 3]. In this study, we performed mineralogical and petrological study of a new quenched angrite NWA 12774 and discuss its relationship to other quenched angrites, especially NWA 1670 and LEW 87051, in order to better understand formation history of quenched angrites.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H. Hayashi, H. Kim, C. Park, T. Mikouchi, V. H. Hoffmann 51st Lunar and Planetary Science Conference (2020), Abstract #2360 PDF (OPEN ACCESS) &#8220;Angrite is one of the oldest basaltic achondrites showing unusual chemistry enriched&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,37],"tags":[1825,5424,5425],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21357"}],"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=21357"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21357\/revisions"}],"predecessor-version":[{"id":21358,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21357\/revisions\/21358"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21357"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}