{"id":13478,"date":"2017-08-15T14:08:42","date_gmt":"2017-08-15T12:08:42","guid":{"rendered":"http:\/\/karmaka.de\/?p=13478"},"modified":"2017-08-15T14:49:03","modified_gmt":"2017-08-15T12:49:03","slug":"reduced-and-unstratified-crust-in-cv-chondrite-parent-body","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=13478","title":{"rendered":"Reduced and unstratified crust in CV chondrite parent body<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>Cl\u00e9ment Ganino &#038; Guy Libourel<\/p>\n<p>Nature Communications 8, Article number: 261 (2017)<br \/>\ndoi:10.1038\/s41467-017-00293-1<br \/>\nPublished online: 15 August 2017<\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-017-00293-1\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br \/>\n<a href=\"https:\/\/www.nature.com\/articles\/s41467-017-00293-1.pdf\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n<p>&#8220;Early Solar System planetesimal thermal models predict the heating of the chondritic protolith and the preservation of a chondritic crust on differentiated parent bodies. Petrological and geochemical analyses of chondrites have suggested that secondary alteration phases formed at low temperatures (<300\u2009\u00b0C) by fluid-rock interaction where reduced and oxidized Vigarano type Carbonaceous (CV) chondrites witness different physicochemical conditions. From a thermodynamical survey of Ca-Fe-rich secondary phases in CV3 chondrites including silica activity (aSiO2), here we show that the classical distinction between reduced and oxidized chondrites is no longer valid and that their Ca-Fe-rich secondary phases formed in similar reduced conditions near the iron-magnetite redox buffer at low aSiO2 (log(aSiO2) <\u22121) and moderate temperature (210\u2013610\u2009\u00b0C). The various lithologies in CV3 chondrites are inferred to be fragments of an asteroid percolated heterogeneously via porous flow of hydrothermal fluid. Putative \u2018onion shell\u2019 structures are not anymore a requirement for the CV parent body crust.\"\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cl\u00e9ment Ganino &#038; Guy Libourel Nature Communications 8, Article number: 261 (2017) doi:10.1038\/s41467-017-00293-1 Published online: 15 August 2017 LINK (OPEN ACCESS) PDF (OPEN ACCESS) &#8220;Early Solar System planetesimal thermal models predict the heating of the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,14,20,21,22,127],"tags":[108,2115,3273,1812,2491,4146,4147,482],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13478"}],"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=13478"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13478\/revisions"}],"predecessor-version":[{"id":13480,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13478\/revisions\/13480"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13478"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13478"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13478"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}