{"id":27282,"date":"2021-04-09T21:24:25","date_gmt":"2021-04-09T19:24:25","guid":{"rendered":"https:\/\/karmaka.de\/?p=27282"},"modified":"2021-04-10T10:51:26","modified_gmt":"2021-04-10T08:51:26","slug":"noble-gases-in-cluster-chondrite-clasts-and-their-host-breccias","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=27282","title":{"rendered":"Noble gases in cluster chondrite clasts and their host breccias<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Kim M\u00fcsing, Henner Busemann, Liliane Huber, Colin Maden, My E. I. Riebe, Rainer Wieler, Knut Metzler<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>Version of Record online: 09 April 2021<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.13644\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.13644\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;We measured noble gases in \u201ccluster chondrite clasts\u201d from nine unequilibrated ordinary chondrites (UOCs). For five meteorites, we also present data for so\u2010called \u201cclastic matrix,\u201d the impact\u2010brecciated material in which the angular to subrounded cluster chondrite clasts are often embedded. Cluster chondrite clasts are characterized by close\u2010fit texture of deformed and indented chondrules with lower amounts of fine\u2010grained interchondrule matrix than in other UOCs (Metzler 2012). They are ubiquitous in UOCs and may indicate accretion and compaction of hot and deformable chondrules within hours or days after formation. Clastic matrix of four of the five meteorites contains He and Ne implanted by the solar wind (SW), indicating that they are regolith breccias. In contrast, cluster chondrite clasts are essentially devoid of SW, confirming that they are fragments of \u201cprimary accretionary rocks\u201d (Metzler 2012). Trapped Kr and Xe in all samples are essentially primordial (type \u201cQ\u201d). Trapped Xe concentrations in cluster chondrite clasts are similar to values in other UOCs of similar metamorphic grade despite their low fractions of primordial gas\u2010bearing fine\u2010grained materials. This possibly indicates that the interchondrule matrix in cluster chondrite clasts is more pristine than matrix of regular UOCs. Later loss of primordial gases during parent body metamorphism is mirrored in the decreasing concentrations of primordial noble gases with increasing petrologic type. Relative to cluster chondrite lithologies, clastic matrix often contains excesses of cosmogenic noble gases, most likely due to precompaction exposure in the parent body regolith.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kim M\u00fcsing, Henner Busemann, Liliane Huber, Colin Maden, My E. I. Riebe, Rainer Wieler, Knut Metzler Meteoritics &amp; Planetary ScienceVersion of Record online: 09 April 2021 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;We measured noble gases&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56,3249,58,506,7,2961],"tags":[1839,5919,3254,5918,1840,1270,1807],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27282"}],"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=27282"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27282\/revisions"}],"predecessor-version":[{"id":27284,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27282\/revisions\/27284"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}