{"id":33006,"date":"2023-03-30T14:24:55","date_gmt":"2023-03-30T13:24:55","guid":{"rendered":"https:\/\/karmaka.de\/?p=33006"},"modified":"2023-03-30T14:24:55","modified_gmt":"2023-03-30T13:24:55","slug":"shock-induced-potassium-and-zinc-isotope-fractionation-in-ordinary-chondrites-and-its-implications","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=33006","title":{"rendered":"Shock-induced potassium and zinc isotope fractionation in ordinary chondrites and its implications"},"content":{"rendered":"\n<p>Ying-Kui Xu, Zhi Li, Shi-Jie Li, Ze-Zhou Wang, De-Liang Wang, Yan Fan, Xiong-Yao Li, Jian-Zhong Liu, Dan Zhu<\/p>\n\n\n\n<p>Geochimica et Cosmochimica Acta<br>In Press, Journal Pre-proof, Available online 30 March 2023<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0016703723001461\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">\u201eTo constrain how impacts influence the behavior of moderately volatile elements (MVEs), we report potassium (K) and zinc (Zn) contents and isotopic compositions of shock melt pockets (SMPs) and unmelted parts of three heavily shocked ordinary chondrites and bulk rocks of Chelyabinsk meteorite. All SMPs are enriched in K content and have lower isotopic values (\u03b441K = -1.99\u2030, -1.22\u2030 and -1.40\u2030) while the adjacent unmelted parts are enriched in heavy K isotopes (\u03b441K = -0.41\u2030, -0.01\u2030 and 0.04\u2030) compared to the bulk rocks of Chelyabinsk meteorite (\u03b441K = -0.77\u2030 and -0.73\u2030). By contrast, Zn is depleted in SMPs and the isotopic compositions are heavier (\u03b466Zn = -0.19\u2030, 2.42\u2030, 1.74\u2030) in SMPs than that in unmelted parts (\u03b466Zn = -0.65\u2030, 1.76\u2030, -0.97\u2030). Our results indicate a decoupling between the two MVEs that Zn is lost from shock melts while K is dramatically enriched in shock melts during impacts. The isotope fractionation of Zn is probably caused by evaporation of shock melts, while K isotope fractionation is most likely caused by solid-melt diffusion which is controlled by its incompatibility. The isotopic decoupling of K from Zn during major impacts further enhances our understanding of high temperature elemental and isotopic behavior of MVEs and may shed new light on the variously heterogeneous distribution of MVEs in solar system.\u201c<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ying-Kui Xu, Zhi Li, Shi-Jie Li, Ze-Zhou Wang, De-Liang Wang, Yan Fan, Xiong-Yao Li, Jian-Zhong Liu, Dan Zhu Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 30 March 2023 LINK \u201eTo constrain how impacts&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,7],"tags":[5146,1694,1833,2003,3297,1807,3236,3706,1692,5094],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33006"}],"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=33006"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33006\/revisions"}],"predecessor-version":[{"id":33007,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33006\/revisions\/33007"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}