{"id":36747,"date":"2024-09-17T06:47:42","date_gmt":"2024-09-17T04:47:42","guid":{"rendered":"https:\/\/karmaka.de\/?p=36747"},"modified":"2024-09-30T17:50:53","modified_gmt":"2024-09-30T15:50:53","slug":"the-arpu-kuilpu-meteorite-in-depth-characterization-of-an-h5-chondrite-delivered-from-a-jupiter-family-comet-orbit","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36747","title":{"rendered":"The Arpu Kuilpu Meteorite: In-depth characterization of an H5 chondrite delivered from a Jupiter Family Comet orbit<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Seamus L. Anderson, Gretchen K. Benedix, Belinda Godel, Romain M. L. Alosius, Daniela Krietsch, Henner Busemann, Colin Maden, Jon M. Friedrich, Lara R. McMonigal, Kees C. Welten, Marc W. Caffee, Robert J. Macke, Se\u00e1n Cadogan, Dominic H. Ryan, Fred Jourdan, Celia Mayers, Matthias Laubenstein, Richard C. Greenwood, Malcom P. Roberts, Hadrien A. R. Devillepoix, Eleanor K. Sansom, Martin C. Towner, Martin Cup\u00e1k, Philip A. Bland, Lucy V. Forman, John H. Fairweather, Ashley F. Rogers, Nicholas E. Timms<\/p>\n\n\n\n<p>Update (30 September 2024): Publication in MAPS <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.14268\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p>Accepted for publication in: Meteoritics and Planetary Science (13 September 2024)<\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/pdf\/2409.10382\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Over the Nullarbor Plain in South Australia, the Desert Fireball Network detected a fireball on the night of 1 June 2019 (7:30 pm local time), and six weeks later recovered a single meteorite (42 g) named Arpu Kuilpu. This meteorite was then distributed to a consortium of collaborating institutions to be measured and analyzed by a number of methodologies including: SEM-EDS, EPMA, ICP-MS, gamma-ray spectrometry, ideal gas pycnometry, magnetic susceptibility measurement, \u03bcCT, optical microscopy, and accelerator and noble gas mass spectrometry techniques. These analyses revealed that Arpu Kuilpu is an unbrecciated H5 ordinary chondrite, with minimal weathering (W0-1) and minimal shock (S2). The olivine and pyroxene mineral compositions (in mol%) are Fa: 19.2 \u00b1 0.2, and Fs: 16.8 \u00b1 0.2, further supporting the H5 type and class. The measured oxygen isotopes are also consistent with an H chondrite (\u03b417O\u2030 = 2.904 \u00b1 0.177; \u03b418O\u2030 = 4.163 \u00b1 0.336; \u039417O\u2030 = 0.740 \u00b1 0.002). Ideal gas pycnometry measured bulk and grain densities of 3.66 \u00b1 0.02 and 3.77 \u00b1 0.02 g cm-3, respectively, yielding a porosity of 3.0 % \u00b1 0.7. The magnetic susceptibility of this meteorite is log \u03c7 = 5.16 \u00b1 0.08. The most recent impact-related heating event experienced by Arpu Kuilpu was measured by 40Ar\/39Ar chronology to be 4467 \u00b1 16 Ma, while the cosmic ray exposure age is estimated to be between 6-8 Ma. The noble gas isotopes, radionuclides, and fireball observations all indicate that Arpu Kuilpu\u2019s meteoroid was quite small (maximum radius of 10 cm, though more likely between 1-5 cm). Although this meteorite is a rather ordinary ordinary chondrite, its prior orbit resembled that of a Jupiter Family Comet (JFC) further lending support to the assertion that many cm- to m-sized objects on JFC orbits are asteroidal rather than cometary in origin&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seamus L. Anderson, Gretchen K. Benedix, Belinda Godel, Romain M. L. Alosius, Daniela Krietsch, Henner Busemann, Colin Maden, Jon M. Friedrich, Lara R. McMonigal, Kees C. Welten, Marc W. Caffee, Robert J. Macke, Se\u00e1n Cadogan,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6028,6,7,47],"tags":[93,6027,1849,1181,5,1807,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36747"}],"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=36747"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36747\/revisions"}],"predecessor-version":[{"id":36794,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36747\/revisions\/36794"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}