LINK<\/strong><\/a><\/p>\n“The present study systematically investigates shock\u2010induced alteration of organic simulants of planetary bodies (OSPBs) as a function of peak shock pressure and temperature by impact experiments. Our results show that the composition and structure of OSPBs are unchanged upon impacts at peak pressures \u2264~5 GPa and temperatures \u2264~350 \u00b0C. On the other hand, these are dramatically changed upon impacts at >7\u20138 GPa and > ~400 \u00b0C, through loss of hydrogen\u2010related bonds and concurrent carbonization, regardless of the initial compositions of OSPBs. Compared with previous results on static heating of organic matter, we suggest that shock\u2010induced alteration cannot be distinguished from static heating only by Raman and infrared spectroscopy. Our experimental results would provide a proxy indicator for assessing degree of shock\u2010induced alteration of organic matter contained in carbonaceous chondrites. We suggest that a remote\u2010sensing signature of the 3.3\u20133.6 \u03bcm absorption due to hydrogen\u2010related bonds on the surface of small bodies would be a promising indicator for the presence of less\u2010thermally\u2010altered (i.e., <350 \u00b0C) organic matter there, which will be a target for landing to collect primordial samples in sample\u2010return spacecraft missions, such as Hayabusa2 and OSIRIS\u2010REx.\"\n<\/p>\n","protected":false},"excerpt":{"rendered":"
Yasuhito Sekine,Kenya Kodama,Takamichi Kobayashi, Seiji Obata, Yu Chang, Nanako O. Ogawa, Yoshinori Takano, , Naohiko Ohkouchi, Koichiro Saiki, Toshimori Sekine First published: 30 March 2018 https:\/\/doi.org\/10.1111\/maps.13075 LINK “The present study systematically investigates shock\u2010induced alteration of…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,2243,576,552,63],"tags":[],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14553"}],"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=14553"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14553\/revisions"}],"predecessor-version":[{"id":14554,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14553\/revisions\/14554"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}