{"id":28745,"date":"2021-09-06T16:41:40","date_gmt":"2021-09-06T14:41:40","guid":{"rendered":"https:\/\/karmaka.de\/?p=28745"},"modified":"2021-09-06T16:41:41","modified_gmt":"2021-09-06T14:41:41","slug":"cathodoluminescence-raman-and-scanning-electron-microscopy-with-energy-dispersion-system-mapping-to-unravel-the-mineralogy-and-texture-of-an-altered-ca-al-rich-inclusion-in-renazzo-cr2-carbonaceous-c","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=28745","title":{"rendered":"Cathodoluminescence, Raman and scanning electron microscopy with energy dispersion system mapping to unravel the mineralogy and texture of an altered Ca-Al-rich inclusion in Renazzo CR2 carbonaceous chondrite<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Mario Tribaudino, Danilo Bersani, Luciana Mantovani, Mattia Pizzati, Giancarlo Salviati<\/p>\n\n\n\n<p>Journal of Raman Spectroscopy<br>First published: 05 September 2021<\/p>\n\n\n\n<p><a href=\"https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/10.1002\/jrs.6234\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/epdf\/10.1002\/jrs.6234\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;An altered fluffy type A Ca-Al-rich inclusion in the CR2 Renazzo carbonaceous chondrite was examined by combined Raman, scanning electron microscopy with energy dispersion system (SEM-EDS) and cathodoluminescence (CL) mapping. Blue CL at 450\u2009nm and orange emission at 600\u2009nm were related to anorthite and calcite, respectively. Raman spectra were highly fluorescent, and only the stronger peaks of anorthite, clinopyroxene and calcite were observed. Raman-induced fluorescence emission was measured using the 632-nm Raman laser source, up to 850\u2009nm, and used to chart the mineral phases. A fluorescence structured peak at 690\u2009nm, split in three subpeaks at 678, 689 and 693\u2009nm, was found; it is likely related to the fluorescence emission of Cr3+ from a fassaitic pyroxene in anorthite. Secondary pyroxene in the Wark\u2013Lovering rim does not show the peak at 690\u2009nm; the different fluorescence emission from the secondary rim and the pyroxene patches within anorthite could be a marker to spot the primary pyroxene. From combined imaging, the events in the altered chondrite could be sequenced. Starting from a pristine assemblage of spinel and melilite, with little fassaite, several alteration episodes occurred. Alteration in secondary anorthite, which could be mapped by the blue CL emission at 450\u2009nm, was followed by alkalization, with rims of sodalite and nepheline, and subsequent formation of secondary clinopyroxene, encircling the inclusion. Widespread calcite alteration, present also in the matrix between chondrules, was the last recorded event.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mario Tribaudino, Danilo Bersani, Luciana Mantovani, Mattia Pizzati, Giancarlo Salviati Journal of Raman SpectroscopyFirst published: 05 September 2021 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;An altered fluffy type A Ca-Al-rich inclusion in the CR2 Renazzo carbonaceous&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,9,12,57],"tags":[1846,3273,1810,234,2401,264,361],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/28745"}],"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=28745"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/28745\/revisions"}],"predecessor-version":[{"id":28746,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/28745\/revisions\/28746"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}