LINK<\/strong><\/a><\/p>\n“Noble gases and nitrogen were measured in two adjacent samples each from the Raghunathpura (IIAB) and the Nyaung (IIIAB) iron meteorite falls. Light noble gases in both the meteorites were of pure cosmogenic origin. Using (3He\/4He)c ratios and the production systematic of Ammon et al. (2009), we estimated the sample depth and meteoroid size for Nyaung (~8 cm depth in a ~15 cm radius object) and Raghunathpura (~12\u201314 cm depth in a ~25 cm object). We derived cosmic ray exposure ages of 1710 \u00b1 256 Ma (for Nyaung, the highest reported so far for the IIIAB group) and 224 \u00b1 34 Ma (for Raghunathpura). Variable amounts of trapped Kr and Xe were found in both meteorites. The phase Q\u2010like elemental ratio (84Kr\/132Xe) suggests that the trapped component is of indigenous origin, and most likely hosted in the heterogeneously distributed micro\u2010inclusions of troilite\/schreibersite. Trapped phase Q component is being reported for the first time, for a IIAB iron meteorite. Both meteorites showed light isotopic composition for nitrogen, and need at least two N components to explain the observed N isotopic systematic. Variable amounts of trapped noble gases and the presence of more than one N component suggest that the magmatic process that formed the parent body of these meteorites either could not completely homogenize or completely degas all the phases. “<\/p>\n","protected":false},"excerpt":{"rendered":"
S. V. S. Murty, S. Ghosh, Dwijesh Ray Meteoritics & Planetary Science First published: 23 September 2018 LINK “Noble gases and nitrogen were measured in two adjacent samples each from the Raghunathpura (IIAB) and the…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[689,1038,214],"tags":[1676,1541,1874,654,1270,4686,4685],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16347"}],"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=16347"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16347\/revisions"}],"predecessor-version":[{"id":16348,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16347\/revisions\/16348"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}