{"id":27722,"date":"2021-05-14T12:00:32","date_gmt":"2021-05-14T10:00:32","guid":{"rendered":"https:\/\/karmaka.de\/?p=27722"},"modified":"2021-05-14T12:00:33","modified_gmt":"2021-05-14T10:00:33","slug":"lunar-meteorite-northwest-africa-11962-a-regolith-breccia-containing-records-of-titanium%e2%80%90rich-lunar-volcanism-and-the-high-alkali-suite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=27722","title":{"rendered":"Lunar meteorite Northwest Africa 11962: A regolith breccia containing records of titanium\u2010rich lunar volcanism and the high alkali suite<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Andreas Bechtold, Franz Brandst\u00e4tter, Lidia Pittarello, Ludovic Ferri\u00e8re, Richard C. Greenwood, Christian Koeberl<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>Version of Record online: 14 May 2021<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.13659\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.13659\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Northwest Africa (NWA) 11962 is a lunar regolith breccia composed of a wide range of different clasts. The lunar origin of this meteorite is confirmed by oxygen isotope analysis and the Fe\/Mn ratio in pyroxene and olivine. In the present study, the clasts and the matrix of NWA 11962 are characterized by optical and electron microscopy along with electron microprobe analyses and micro\u2010Raman spectroscopy. The meteorite has a glassy impact melt matrix, which accounts for 35% of the surface area in the two thin sections examined, and which contains a very large variety of different lithic clasts, monomineralic clasts, and glass fragments. The presence of volcanic and impact\u2010related glass spherules led to the classification of this meteorite as a regolith breccia. Lithic clasts include numerous fragments of quartz monzogabbro and lunar felsite, which are quite rare lithologies in the lunar alkali suite. However, the most abundant components in the breccia are gabbroic clasts. The mineral chemistry of the pyroxenes in the gabbroic clasts and the chemistry of various types of glass fragments in the breccia indicate an origin of the regolith from an area with low\u2010Ti to high\u2010Ti mare basalt volcanism. In addition to the peculiar petrographic characteristics of NWA 11962, the possible pairing relationships with other lunar meteorites are discussed.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Andreas Bechtold, Franz Brandst\u00e4tter, Lidia Pittarello, Ludovic Ferri\u00e8re, Richard C. Greenwood, Christian Koeberl Meteoritics &amp; Planetary ScienceVersion of Record online: 14 May 2021 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Northwest Africa (NWA) 11962 is a lunar&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[1827,5939,2928],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27722"}],"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=27722"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27722\/revisions"}],"predecessor-version":[{"id":27724,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27722\/revisions\/27724"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}