LINK<\/strong><\/a><\/p>\n\n\n\n“Some xenolithic clasts in meteorites may have originated from unique primitive Solar System bodies. These clasts would provide novel insights into the early evolution of the Solar System. We conducted multiple analyses of organic matter (OM) in a CI-like xenolithic clast in the Zag (H5) meteorite including bulk elemental and isotopic analysis, FTIR, STXM\/XANES, and NanoSIMS. The bulk C and N abundances in the Zag clast were +5.1 \u00b1 0.4 wt.% and +0.26 \u00b1 0.01 wt.%, respectively, which were the highest observed among various chondrite groups. The bulk \u03b413C value of the Zag clast was +23.0 \u00b1 4.1 \u2030 which was close to the value of the Tagish Lake meteorite; the \u03b415N value was +300 \u00b1 3 \u2030 which was close to the values of CR chondrites and Bells (a unique CM). The \u03b4D values of C-rich regions obtained by NanoSIMS were approximately +600 to +2000\u2030 which were close to the values of IOM from CI, CM and Tagish Lake. Some isotopic \u201chot spots\u201d were observed with \u03b4D values up to \u2248 +4000\u2030 and \u03b415N values up to \u2248 +5500\u2030. The infrared transmission spectrum of the Zag clast was consistent with the abundant phyllosilicates and carbonates observed in the clast. The STXM showed abundant OM in various forms. C-XANES spectra from the OM were generally similar to CI\/CM\/CR chondrites. However, some variations existed in the molecular structures. OM in the Zag clast was partially associated with carbonates. The functional group, elemental and isotopic signatures of the OM in the Zag clast support the idea that the Zag clast is unique among known carbonaceous chondrite groups and originated from the outer Solar System such as aqueously-altered D\/P type asteroids.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Yoko Kebukawa, Michael E. Zolensky, Motoo Ito, Nanako O. Ogawa, Yoshinori Takano, Naohiko Ohkouchi, Aiko Nakato, Hiroki Suga, Yasuo Takeichi, Yoshio Takahashi, Kensei Kobayashi Geochimica et Cosmochimica Acta Available online 19 December 2019 LINK “Some…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,3249,3424,576],"tags":[5332,1989,3252,749],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20952"}],"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=20952"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20952\/revisions"}],"predecessor-version":[{"id":20953,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20952\/revisions\/20953"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}