{"id":27823,"date":"2021-05-20T21:27:33","date_gmt":"2021-05-20T19:27:33","guid":{"rendered":"https:\/\/karmaka.de\/?p=27823"},"modified":"2021-10-08T16:53:59","modified_gmt":"2021-10-08T14:53:59","slug":"the-tarda-meteorite-a-window-into-the-formation-of-d-type-asteroids","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=27823","title":{"rendered":"The Tarda Meteorite: A Window into the Formation of D-type Asteroids<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Yves Marrocchi, Guillaume Avice, and Jean-Alix Barrat<\/p>\n\n\n\n<p>The Astrophysical Journal Letters, Volume 913, Number 1<br>Published: 19 May 2021<\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/hal.archives-ouvertes.fr\/hal-03368940\/document\" target=\"_blank\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/2041-8213\/abfaa3\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Dynamic models of solar system evolution suggest that D-type asteroids formed beyond Saturn&#8217;s orbit and represent invaluable witnesses of the prevailing conditions in the outer solar system. Here, we report a comprehensive petrographic and isotopic characterization of the carbonaceous chondrite Tarda, a recent fall recovered in the Moroccan Sahara. We show that Tarda shares strong similarities with the D-type-derived chondrite Tagish Lake, implying that Tarda represents a rare sample of D-type asteroids. Both Tarda and Tagish Lake are characterized by the presence of rare 16O-rich chondrules and chondrule fragments, high C\/H ratios, and enrichments in deuterium, 15N, and 13C. By combining our results with literature data on carbonaceous chondrites related to C-type asteroids, we show that the outer solar system 4.56 Gy ago was characterized by large-scale oxygen isotopic homogeneities in (i) the water\u2013ice grains accreted by asteroids and (ii) the gas controlling the formation of FeO-poor chondrules. Conversely, the zone in which D-type asteroids accreted was significantly enriched in deuterium relative to the formation regions of C-type asteroids, features likely inherited from unprocessed, D-rich, molecular-cloud materials.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yves Marrocchi, Guillaume Avice, and Jean-Alix Barrat The Astrophysical Journal Letters, Volume 913, Number 1Published: 19 May 2021 PDF (OPEN ACCESS) LINK &#8220;Dynamic models of solar system evolution suggest that D-type asteroids formed beyond Saturn&#8217;s&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,2350,9,3424,3172,5746,335,47],"tags":[3273,2940,5747,1731,2018,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27823"}],"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=27823"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27823\/revisions"}],"predecessor-version":[{"id":28908,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27823\/revisions\/28908"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}