{"id":16298,"date":"2018-09-22T08:52:23","date_gmt":"2018-09-22T06:52:23","guid":{"rendered":"http:\/\/karmaka.de\/?p=16298"},"modified":"2018-09-22T08:56:49","modified_gmt":"2018-09-22T06:56:49","slug":"heating-experiments-of-the-tagish-lake-meteorite-investigation-of-the-effects-of-short%e2%80%90term-heating-on-chondritic-organics","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=16298","title":{"rendered":"Heating experiments of the Tagish Lake meteorite: Investigation of the effects of short\u2010term heating on chondritic organics<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"<p>Queenie H. S. Chan, Aiko Nakato, Yoko Kebukawa, Michael E. Zolensky, Tomoki Nakamura, Jessica A. Maisano, Matthew W. Colbert, James E. Martinez, A. L. David Kilcoyne, Hiroki Suga, Yoshio Takahashi, Yasuo Takeichi, Kazuhiko Mase, Ian P. Wright<\/p>\n<p>Meteoritics &#038; Planetary Science<br \/>\nFirst published: 21 September 2018<\/p>\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1111\/maps.13193\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br \/>\n<a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.13193\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n<p>&#8220;We present in this study the effects of short\u2010term heating on organics in the Tagish Lake meteorite and how the difference in the heating conditions can modify the organic matter (OM) in a way that complicates the interpretation of a parent body&#8217;s heating extent with common cosmothermometers. The kinetics of short\u2010term heating and its influence on the organic structure are not well understood, and any study of OM is further complicated by the complex alteration processes of the thermally metamorphosed carbonaceous chondrites\u2014potential analogues of the target asteroid Ryugu of the Hayabusa2 mission\u2014which had experienced posthydration, short\u2010duration local heating. In an attempt to understand the effects of short\u2010term heating on chondritic OM, we investigated the change in the OM contents of the experimentally heated Tagish Lake meteorite samples using Raman spectroscopy, scanning transmission X\u2010ray microscopy utilizing X\u2010ray absorption near edge structure spectroscopy, and ultraperformance liquid chromatography fluorescence detection and quadrupole time of flight hybrid mass spectrometry. Our experiment suggests that graphitization of OM did not take place despite the samples being heated to 900 \u00b0C for 96 h, as the OM maturity trend was influenced by the heating conditions, kinetics, and the nature of the OM precursor, such as the presence of abundant oxygenated moieties. Although both the intensity of the 1s\u2212\u03c3* exciton cannot be used to accurately interpret the peak metamorphic temperature of the experimentally heated Tagish Lake sample, the Raman graphite band widths of the heated products significantly differ from that of chondritic OM modified by long\u2010term internal heating.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Queenie H. S. Chan, Aiko Nakato, Yoko Kebukawa, Michael E. Zolensky, Tomoki Nakamura, Jessica A. Maisano, Matthew W. Colbert, James E. Martinez, A. L. David Kilcoyne, Hiroki Suga, Yoshio Takahashi, Yasuo Takeichi, Kazuhiko Mase, Ian&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,2350,9,2243,181,335],"tags":[3991,3274,3273,2244,331,4684,572,1843],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16298"}],"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=16298"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16298\/revisions"}],"predecessor-version":[{"id":16300,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/16298\/revisions\/16300"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}