{"id":40094,"date":"2026-02-04T12:26:50","date_gmt":"2026-02-04T11:26:50","guid":{"rendered":"https:\/\/karmaka.de\/?p=40094"},"modified":"2026-02-04T12:26:51","modified_gmt":"2026-02-04T11:26:51","slug":"moons-volcanic-history-revealed-in-glassy-spherules-from-apollo-17-soil-76501","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=40094","title":{"rendered":"Moon&#8217;s volcanic history revealed in glassy spherules from Apollo 17 soil 76501<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Alexander A. Nemchin, Marc D. Norman, Martin J. Whitehouse, Evgenia Salin, Nicholas E. Timms, Tao Long, Xiaochao Che, Renaud Merle, Fred Jourdan, Tao Luo<\/p>\n\n\n\n<p>MAPS, First published: 04 February 2026<\/p>\n\n\n\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.70103\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/epdf\/10.1111\/maps.70103\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Rapidly quenched droplets of pyroclastically erupted lava are common in lunar regolith at landing sites proximal to the maria. Here, we document the U-Pb chronologies, major element, and trace element compositions of picritic glassy particles from Apollo 17 regolith sample 76501. These particles are dominated by high-Ti compositions similar to those of the established Apollo 17 orange and black pyroclastic deposits, but the textures of some beads indicate slower cooling and\/or equilibration at lower temperatures. Using a new approach to calibrate SIMS U-Pb isotopic analysis of vitrophyric beads, we show that their U-Pb ages are consistent with a single or closely timed multiple eruptions ~50\u2013100\u2009Ma younger than the 3752\u2009\u00b1\u20099 to 3758\u2009\u00b1\u200912\u2009Ma crystalline mare basalts collected at this site. A few picritic beads with very low-Ti compositions may be younger, but their ages are not well defined and can be ~3.3\u20133.6\u2009Ga.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alexander A. Nemchin, Marc D. Norman, Martin J. Whitehouse, Evgenia Salin, Nicholas E. Timms, Tao Long, Xiaochao Che, Renaud Merle, Fred Jourdan, Tao Luo MAPS, First published: 04 February 2026 LINK (OPEN ACCESS)PDF (OPEN ACCESS)&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41,115],"tags":[2121,1827,1478,4677,1857],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/40094"}],"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=40094"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/40094\/revisions"}],"predecessor-version":[{"id":40095,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/40094\/revisions\/40095"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}