{"id":36338,"date":"2024-06-19T15:20:07","date_gmt":"2024-06-19T13:20:07","guid":{"rendered":"https:\/\/karmaka.de\/?p=36338"},"modified":"2024-06-19T15:20:08","modified_gmt":"2024-06-19T13:20:08","slug":"a-mineralogical-and-isotopic-study-of-the-historic-monomict-eucrite-padvarninkai","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36338","title":{"rendered":"A mineralogical and isotopic study of the historic monomict eucrite Padvarninkai<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>T. J. Barrett, A. J. King, G. Degli-Alessandrini, S. J. Hammond, E. Humphreys-Williams, B. Schmidt, R. C. Greenwood, F. A. J. Abernethy, M. Anand, E. Rudnickait\u0117<\/p>\n\n\n\n<p>MAPS, Version of Record online: 18 June 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.14229\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.14229\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The Padvarninkai meteorite is a relatively understudied eucrite, initially misclassified as a shergottite given its strong shock characteristics. In this study, a comprehensive examination of the petrology; mineral composition; major, minor, and trace element abundances; and isotopic composition (C, O) is presented. Padvarninkai is a monomict eucrite consisting of a fine to coarse-grained lithology and impact melt veins. Pyroxene grains are typically severely fractured and mosaicked whilst plagioclase is either partially or totally converted to maskelynite. Based on shock features observed in pyroxene, plagioclase, and apatite, Padvarninkai can be given a shock classification of M-S4\/5. Despite the high shock experienced by this sample, some of the original igneous textures remain. Compositionally, Padvarninkai is a main group eucrite with a flat REE pattern (~10\u201312\u2009\u00d7\u2009CI) and elevated Ni abundances. Whilst both new and literature oxygen isotopes are similar to other eucrites, however, Padvarninkai displays an anomalously high \u03b413C value. To reconcile the high Ni and \u03b413C value, impact contamination modeling was conducted. These models could not reconcile both the high Ni and \u03b413C value with the eucritic \u03b418O values, arguing against impact as a source for these anomalies.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T. J. Barrett, A. J. King, G. Degli-Alessandrini, S. J. Hammond, E. Humphreys-Williams, B. Schmidt, R. C. Greenwood, F. A. J. Abernethy, M. Anand, E. Rudnickait\u0117 MAPS, Version of Record online: 18 June 2024 LINK&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[1823,5808,1845,6055,4205],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36338"}],"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=36338"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36338\/revisions"}],"predecessor-version":[{"id":36339,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36338\/revisions\/36339"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}