{"id":33902,"date":"2023-06-23T13:49:05","date_gmt":"2023-06-23T11:49:05","guid":{"rendered":"https:\/\/karmaka.de\/?p=33902"},"modified":"2023-06-23T13:49:06","modified_gmt":"2023-06-23T11:49:06","slug":"magnetic-recording-stability-of-taenite-containing-meteorites","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=33902","title":{"rendered":"Magnetic Recording Stability of Taenite-Containing Meteorites<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Jos\u00e9 A. P. M. Devienne, Thomas A. Berndt, Wyn Williams, Lesleis Nagy<\/p>\n\n\n\n<p>Geophysical Research Letters<br>Volume 50, Issue12<br>28 June 2023<\/p>\n\n\n\n<p><a href=\"https:\/\/agupubs.onlinelibrary.wiley.com\/doi\/10.1029\/2022GL102602\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/agupubs.onlinelibrary.wiley.com\/doi\/epdf\/10.1029\/2022GL102602\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Key Points<\/p>\n\n\n\n<ul><li>Nanometer-scaled taenite observed in different meteoritic microstructures are magnetically stable over billion-years timescales<\/li><li>Taenite-containing cloudy zones are dominates by uniform states able to record stable magnetizations as grains grow through \u223c14 nm<\/li><li>Vortex states observed in larger (&gt;50 nm) taenite grains are also highly stable, but may be reset upon tetrataenite ordering&#8221;<\/li><\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;Sub-\u03bcm taenite and tetrataenite grains observed in a number of (stony-)iron meteorite groups are promising sources of paleomagnetic records in meteorites. While slowly-cooled meteorites form tetrataenite\u2014an extremely good recorder\u2014, fast-cooled meteorites may contain fine-grained taenite, which was considered unsuitable for paleomagnetic studies. In this work, however, we show that nm-sized taenite grains are stable over billion-year timescales, indicating that taenite-bearing meteorites are reliable sources of paleomagnetic information. We find a range of sizes for which taenite forms stable single-domain structures, which coincides with the grain sizes observed in the cloudy zone of most fast cooled IVA meteorites. These meteorites, therefore, can provide reliable paleomagnetic information recorded as a stable crystallization remanent magnetization as taenite grains grown. Vortex states observed in larger (&gt;50 nm) grain sizes are also highly stable, indicating that coarse-grained taenite observed in meteoritic microstructures can also provide reliable records of paleomagnetic fields.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jos\u00e9 A. P. M. Devienne, Thomas A. Berndt, Wyn Williams, Lesleis Nagy Geophysical Research LettersVolume 50, Issue1228 June 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Key Points Nanometer-scaled taenite observed in different meteoritic microstructures are magnetically&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[214,255,219],"tags":[1877,590,3498],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33902"}],"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=33902"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33902\/revisions"}],"predecessor-version":[{"id":33903,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33902\/revisions\/33903"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}