{"id":108,"date":"2014-08-14T09:20:41","date_gmt":"2014-08-14T07:20:41","guid":{"rendered":"http:\/\/karmaka.de\/?p=108"},"modified":"2014-11-15T21:19:02","modified_gmt":"2014-11-15T20:19:02","slug":"the-ardon-l6-ordinary-chondrite-a-long-hidden-spanish-meteorite-fall","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=108","title":{"rendered":"The Ard\u00f3n L6 ordinary chondrite: A long-hidden Spanish meteorite fall"},"content":{"rendered":"<p>Trigo-Rodr\u00edguez, J. M., Llorca, J., Weyrauch, M., Bischoff, A., Moyano-Cambero, C. E., Keil, K., Laubenstein, M., Pack, A., Madiedo, J. M., Alonso-Azc\u00e1rate, J., Riebe, M., Wieler, R., Ott, U., Tapia, M. and Mestres, N. (2014)<\/p>\n<p>Meteoritics &amp; Planetary Science. doi: 10.1111\/maps.12344<\/p>\n<p><a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.12344\/abstract\"><strong>LINK<\/strong><\/a><\/p>\n<p><a href=\"http:\/\/karmaka.de\/wp-content\/uploads\/2014\/10\/Ardon_JMTrigo_CSIC.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-30\" src=\"http:\/\/karmaka.de\/wp-content\/uploads\/2014\/10\/Ardon_JMTrigo_CSIC.jpg\" alt=\"Ardon_JMTrigo_CSIC\" width=\"1009\" height=\"597\" srcset=\"https:\/\/karmaka.de\/wp-content\/uploads\/2014\/10\/Ardon_JMTrigo_CSIC.jpg 1009w, https:\/\/karmaka.de\/wp-content\/uploads\/2014\/10\/Ardon_JMTrigo_CSIC-300x177.jpg 300w\" sizes=\"(max-width: 1009px) 100vw, 1009px\" \/><\/a><\/p>\n<div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">We report and describe an L6 ordinary chondrite fall that occurred in Ard\u00f3n, Le\u00f3n province, Spain (longitude 5.5605\u00b0W, latitude 42.4364\u00b0N) on July 9th, 1931. The 5.5 g single stone was kept hidden for 83 yr by Rosa Gonz\u00e1lez P\u00e9rez, at the time an 11 yr old who had observed the fall and had recovered the meteorite. According to various newspaper reports, the event was widely observed in Northern Spain. Ard\u00f3n is a very well-preserved, fresh, strongly metamorphosed (petrologic type 6), and weakly shocked (S3) ordinary chondrite with well-equilibrated and recrystallized minerals. The mineral compositions (olivine Fa23.7\u00b10.3, low-Ca pyroxene Fs20.4\u00b10.2Wo1.5\u00b10.2, plagioclase An10.3\u00b10.5Ab84.3\u00b11.2), magnetic susceptibility (log \u03c7 = 4.95 \u00b1 0.05 \u00d7 10\u22129 m3 kg\u22121), bulk density (3.49 \u00b1 0.05 g cm\u22123), grain density (3.58 \u00b1 0.05 g cm\u22123), and porosity (2.5 vol%) are typical for L6 chondrites. Short-lived radionuclides confirm that the meteorite constitutes a recent fall. The 21Ne and 38Ar cosmic ray exposure ages are both about 20\u201330 Ma, similar to values for many other L chondrites. The cosmogenic 22Ne\/21Ne ratio indicates that preatmospheric Ard\u00f3n was a relatively large body. The fact that the meteorite was hidden in private hands for 83 yr makes one wonder if other meteorite falls may have experienced the same fate, thus possibly explaining the anomalously low number of falls reported in continental Spain in the 20th century.<\/div><\/div>\n<p><a href=\"http:\/\/www.hou.usra.edu\/meetings\/metsoc2014\/pdf\/5068.pdf\"><strong>ARD\u00d3N: A LONG HIDDEN L6 CHONDRITE FALL<\/strong><\/a><br \/>\nJ.M. Trigo &#8211; Rodr\u00edguez et al.<br \/>\nAbstract 5068, 77th Annual Meteoritical Society Meeting (2014)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trigo-Rodr\u00edguez, J. M., Llorca, J., Weyrauch, M., Bischoff, A., Moyano-Cambero, C. E., Keil, K., Laubenstein, M., Pack, A., Madiedo, J. M., Alonso-Azc\u00e1rate, J., Riebe, M., Wieler, R., Ott, U., Tapia, M. and Mestres, N. (2014)&#8230;<\/p>\n","protected":false},"author":1,"featured_media":30,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[102,1815,103,1807,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/108"}],"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=108"}],"version-history":[{"count":3,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":2228,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/108\/revisions\/2228"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/media\/30"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}