{"id":21303,"date":"2020-01-27T07:04:13","date_gmt":"2020-01-27T06:04:13","guid":{"rendered":"http:\/\/karmaka.de\/?p=21303"},"modified":"2020-01-27T07:04:14","modified_gmt":"2020-01-27T06:04:14","slug":"the-history-of-the-tissint-meteorite-from-its-crystallization-on-mars-to-its-exposure-in-space-new-geochemical-isotopic-and-cosmogenic-nuclide-data","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=21303","title":{"rendered":"The history of the Tissint meteorite, from its crystallization on Mars to its exposure in space: New geochemical, isotopic, and cosmogenic nuclide data<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Toni Schulz, Pavel P. Povinec, Ludovic Ferri\u00e8re, A. J. Timothy Jull, Andrej Kov\u00e1\u010dik, Ivan S\u00fdkora, Jonas Tusch, Carsten M\u00fcnker, Dan Topa, Christian Koeberl <\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science <\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1111\/maps.13435\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br>\n<a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.13435\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The Tissint meteorite fell on July 18, 2011 in Morocco and was quickly recovered, allowing the investigation of a new unaltered sample from Mars. We report new high\u2010field strength and highly siderophile element (HSE) data, Sr\u2010Nd\u2010Hf\u2010W\u2010Os isotope analyses, and data for cosmogenic nuclides in order to examine the history of the Tissint meteorite, from its source composition and crystallization to its irradiation history. We present high\u2010field strength element compositions that are typical for depleted Martian basalts (0.174 ppm Nb, 17.4 ppm Zr, 0.7352 ppm Hf, and 0.0444 ppm W), and, together with an extended literature data set for shergottites, help to reevaluate Mars\u2019 tectonic evolution in comparison to that of the early Earth. HSE contents (0.07 ppb Re, 0.92 ppb Os, 2.55 ppb Ir, and 7.87 ppb Pt) vary significantly in comparison to literature data, reflecting significant sample inhomogeneity. Isotope data for Os and W (187Os\/188Os = 0.1289 \u00b1 15 and an \u03b5182W = +1.41 \u00b1 0.46) are both indistinguishable from literature data. An internal Lu\u2010Hf isochron for Tissint defines a crystallization age of 665 \u00b1 74 Ma. Considering only Sm\u2010Nd and Lu\u2010Hf chronometry, we obtain, using our and literature values, a best estimate for the age of Tissint of 582 \u00b1 18 Ma (MSWD = 3.2). Cosmogenic radionuclides analyzed in the Tissint meteorite are typical for a recent fall. Tissint&#8217;s pre\u2010atmospheric radius was estimated to be 22 \u00b1 2 cm, resulting in an estimated total mass of 130 \u00b1 40 kg. Our cosmic\u2010ray exposure age of 0.9 \u00b1 0.2 Ma is consistent with earlier estimations and exposure ages for other shergottites in general.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Toni Schulz, Pavel P. Povinec, Ludovic Ferri\u00e8re, A. J. Timothy Jull, Andrej Kov\u00e1\u010dik, Ivan S\u00fdkora, Jonas Tusch, Carsten M\u00fcnker, Dan Topa, Christian Koeberl Meteoritics &amp; Planetary Science LINK (OPEN ACCESS) PDF (OPEN ACCESS) &#8220;The Tissint&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69,523,43,524,47],"tags":[1884,404,1828,1885],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21303"}],"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=21303"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21303\/revisions"}],"predecessor-version":[{"id":21304,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21303\/revisions\/21304"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}