{"id":37363,"date":"2025-02-15T00:10:53","date_gmt":"2025-02-14T23:10:53","guid":{"rendered":"https:\/\/karmaka.de\/?p=37363"},"modified":"2025-02-15T00:10:53","modified_gmt":"2025-02-14T23:10:53","slug":"the-mystery-of-the-missing-mantle-problem-and-insights-from-spectroscopy","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=37363","title":{"rendered":"The mystery of the missing mantle problem and insights from spectroscopy<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>B.G. Rider-Stokes, S.L. Jackson, T.J. Burbine, R.C. Greenwood, E.M. MacLennan, L.F. White, S.S. Russell, M. Anand, M.M. Grady<\/p>\n\n\n\n<p>Icarus<br>Available online 11 February 2025, 116506<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0019103525000533\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK + PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<ul>\n<li>We measure the spectral properties of four olivine-rich achondrite meteorites.<\/li>\n\n\n\n<li>We find that the samples demonstrate similarities to Q and Sa-type asteroids.<\/li>\n\n\n\n<li>These findings imply there may be more olivine-rich asteroids in the Solar System.<\/li>\n\n\n\n<li>This study is a first step toward solving the mystery of the Missing Mantle Problem.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;Differentiation of planetesimals results in the segregation of materials, with the densest materials sinking, producing a metallic core, while the lighter fraction, rises, fabricating a crust. While there are multiple examples of planetary crusts (e.g., V-type asteroids) and metallic cores (e.g., M-type asteroids), there appears to be a scarcity of mantle-like materials in both the asteroid (e.g., A-type asteroids) and meteorite record. This lack of olivine-dominated material has been dubbed \u2018The Missing Mantle Problem\u2019. Here we measure the reflectance spectra of four olivine-rich meteorites expected to originate from the mantle of differing planetesimals. Following the Bus-DeMeo taxonomy, NWA 12264 and Chassigny can be classified as Sa-types, while NWA 8535 and NWA 15717 are classified as Q-types. This result implies that mantle-like materials are not restricted to A-type asteroids as previously expected. This study provides a significant step toward the resolution of the apparent shortage of olivine-rich material in the early Solar System.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B.G. Rider-Stokes, S.L. Jackson, T.J. Burbine, R.C. Greenwood, E.M. MacLennan, L.F. White, S.S. Russell, M. Anand, M.M. Grady IcarusAvailable online 11 February 2025, 116506 LINK + PDF (OPEN ACCESS) &#8220;Highlights &#8220;Differentiation of planetesimals results in&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6245,28,37,77,45,73,5105,130,507],"tags":[3096,1120,384,6814,3587,4841,6815,977,1479,2285],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/37363"}],"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=37363"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/37363\/revisions"}],"predecessor-version":[{"id":37364,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/37363\/revisions\/37364"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=37363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=37363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=37363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}