{"id":19483,"date":"2019-05-13T21:24:09","date_gmt":"2019-05-13T19:24:09","guid":{"rendered":"http:\/\/karmaka.de\/?p=19483"},"modified":"2019-05-30T11:12:28","modified_gmt":"2019-05-30T09:12:28","slug":"the-cm-carbonaceous-chondrite-regolith-diepenveen","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=19483","title":{"rendered":"The CM carbonaceous chondrite regolith Diepenveen"},"content":{"rendered":"\n<p class=\"justify-text\">Marco Langbroek, Peter Jenniskens, Leo M. Kriegsman, Henk Nieuwenhuis, Niek De Kort, Jacob Kuiper, Wim Van Westrenen, Michael E. Zolensky, Karen Ziegler, Qing\u2010Zhu Yin, Matthew E. Sanborn, Josh Wimpenny, Akane Yamakawa, Sebastiaan J. De Vet, Matthias M. M. Meier, Kees C. Welten, Kunihiko Nishiizumi, Marc W. Caffee, Aaron S. Burton, Jason P. Dworkin, Daniel P. Glavin, Qinghao Wu, Richard N. Zare, Alexander Ruf, Mourad Harir, Philippe Schmitt\u2010Kopplin, The Diepenveen Meteorite Consortium<\/p>\n\n\n\n<p>Meteoritics &amp; Planetary Science<br>\nFirst Published: 13 May 2019<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1111\/maps.13297\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;A carbonaceous chondrite was recovered immediately after the fall near the village of Diepenveen in the Netherlands on October 27, 1873, but came to light only in 2012. Analysis of sodium and poly\u2010aromatic hydrocarbon content suggests little contamination from handling. Diepenveen is a regolith breccia with an overall petrology consistent with a CM classification. Unlike most other CM chondrites, the bulk oxygen isotopes are extremely 16O rich, apparently dominated by the signature of anhydrous minerals, distributed on a steep slope pointing to the domain of intrinsic CM water. A small subset plots closer to the normal CM regime, on a parallel line 2 \u2030 lower in \u03b417O. Different lithologies in Diepenveen experienced varying levels of aqueous alteration processing, being less aqueously altered at places rather than more heated. The presence of an agglutinate grain and the properties of methanol\u2010soluble organic compounds point to active impact processing of some of the clasts. Diepenveen belongs to a CM clan with ~5 Ma CRE age, longer than most other CM chondrites, and has a relatively young K\u2010Ar resetting age of ~1.5 Ga. As a CM chondrite, Diepenveen may be representative of samples soon to be returned from the surface of asteroid (162173) Ryugu by the Hayabusa2 spacecraft.&#8221;<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"justify-text\">More on the story of the Diepenveen meteorite&#8217;s discovery and preservation through time can be found <a href=\"http:\/\/karmaka.de\/?page_id=164\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>here<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Marco Langbroek, Peter Jenniskens, Leo M. Kriegsman, Henk Nieuwenhuis, Niek De Kort, Jacob Kuiper, Wim Van Westrenen, Michael E. Zolensky, Karen Ziegler, Qing\u2010Zhu Yin, Matthew E. Sanborn, Josh Wimpenny, Akane Yamakawa, Sebastiaan J. De Vet,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,18,2291,47],"tags":[3273,105,4978,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/19483"}],"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=19483"}],"version-history":[{"count":4,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/19483\/revisions"}],"predecessor-version":[{"id":19657,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/19483\/revisions\/19657"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}