{"id":5070,"date":"2015-06-23T14:57:40","date_gmt":"2015-06-23T12:57:40","guid":{"rendered":"http:\/\/karmaka.de\/?p=5070"},"modified":"2015-06-23T15:00:39","modified_gmt":"2015-06-23T13:00:39","slug":"early-aqueous-activity-on-the-ordinary-and-carbonaceous-chondrite-parent-bodies-recorded-by-fayalite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=5070","title":{"rendered":"Early aqueous activity on the ordinary and carbonaceous chondrite parent bodies recorded by fayalite"},"content":{"rendered":"<p>Patricia M. Doyle, Kaori Jogo, Kazuhide Nagashima, Alexander N. Krot, Shigeru Wakita, Fred J. Ciesla, Ian D. Hutcheon<\/p>\n<p>Nature Communications 6, Article number: 7444<br \/>\ndoi:10.1038\/ncomms8444<br \/>\npublished: 23 June 2015 <\/p>\n<p><a href=\"http:\/\/www.nature.com\/ncomms\/2015\/150623\/ncomms8444\/full\/ncomms8444.html\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/www.nature.com\/ncomms\/2015\/150623\/ncomms8444\/extref\/ncomms8444-s1.pdf\" target=\"_blank\"><strong>Supplementary Information (PDF)<\/strong><\/a><\/p>\n<div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">Chronology of aqueous activity on chondrite parent bodies constrains their accretion times and thermal histories. Radiometric 53Mn\u201353Cr dating has been successfully applied to aqueously formed carbonates in CM carbonaceous chondrites. Owing to the absence of carbonates in ordinary (H, L and LL), and CV and CO carbonaceous chondrites, and the lack of proper standards, there are no reliable ages of aqueous activity on their parent bodies. Here we report the first 53Mn\u201353Cr ages of aqueously formed fayalite in the L3 chondrite Elephant Moraine 90161 as Myr after calcium\u2013aluminium-rich inclusions (CAIs), the oldest Solar System solids. In addition, measurements using our synthesized fayalite standard show that fayalite in the CV3 chondrite Asuka 881317 and CO3-like chondrite MacAlpine Hills 88107 formed and Myr after CAIs, respectively. Thermal modelling, combined with the inferred conditions (temperature and water\/rock ratio) and 53Mn\u201353Cr ages of aqueous alteration, suggests accretion of the L, CV and CO parent bodies ~1.8\u22122.5\u2009Myr after CAIs.<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Patricia M. Doyle, Kaori Jogo, Kazuhide Nagashima, Alexander N. Krot, Shigeru Wakita, Fred J. Ciesla, Ian D. Hutcheon Nature Communications 6, Article number: 7444 doi:10.1038\/ncomms8444 published: 23 June 2015 LINK Supplementary Information (PDF)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78,61,77,9,19,14,23,7,127,337],"tags":[671,1842,1668,105,1666,1667,1669],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/5070"}],"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=5070"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/5070\/revisions"}],"predecessor-version":[{"id":5072,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/5070\/revisions\/5072"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}