{"id":21595,"date":"2020-03-03T17:58:06","date_gmt":"2020-03-03T16:58:06","guid":{"rendered":"http:\/\/karmaka.de\/?p=21595"},"modified":"2021-02-03T07:18:11","modified_gmt":"2021-02-03T06:18:11","slug":"unique-achondrite-northwest-africa-11042-exploring-the-melting-and-breakup-of-the-l-chondrite-parent-body","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=21595","title":{"rendered":"Unique achondrite Northwest Africa 11042: Exploring the melting and breakup of the L chondrite parent body<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Zolt\u00e1n V\u00e1ci, Carl B. Agee, Munir Humayun, Karen Ziegler, Yemane Asmerom, Victor Polyak, Henner Busemann, Daniela Krietsch, Matthew Heizler, Matthew E. Sanborn, Qing\u2010Zhu Yin<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>\nFirst Published:  2 March 2020<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1111\/maps.13456\" 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\/2102\/2102.01281.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Northwest Africa (NWA) 11042 is a heavily shocked achondrite with medium\u2010grained cumulate textures. Its olivine and pyroxene compositions, oxygen isotopic composition, and chromium isotopic composition are consistent with L chondrites. Sm\u2010Nd dating of its primary phases shows a crystallization age of 4100 \u00b1 160 Ma. Ar\u2010Ar dating of its shocked mineral maskelynite reveals an age of 484.0 \u00b1 1.5 Ma. This age coincides roughly with the breakup event of the L chondrite parent body evident in the shock ages of many L chondrites and the terrestrial record of fossil L chondritic chromite. NWA 11042 shows large depletions in siderophile elements (&lt;0.01\u00d7CI) suggestive of a complex igneous history involving extraction of a Fe\u2010Ni\u2010S liquid on the L chondrite parent body. Due to its relatively young crystallization age, the heat source for such an igneous process is most likely impact. Because its mineralogy, petrology, and O isotopes are similar to the ungrouped achondrite NWA 4284 (this work), the two meteorites are likely paired and derived from the same parent body.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Zolt\u00e1n V\u00e1ci, Carl B. Agee, Munir Humayun, Karen Ziegler, Yemane Asmerom, Victor Polyak, Henner Busemann, Daniela Krietsch, Matthew Heizler, Matthew E. Sanborn, Qing\u2010Zhu Yin Meteoritics &amp; Planetary Science First Published: 2 March 2020 LINK PDF&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,23,7],"tags":[1819,1884,3188,325,490,3583,5471],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21595"}],"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=21595"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21595\/revisions"}],"predecessor-version":[{"id":25901,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21595\/revisions\/25901"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}