{"id":41750,"date":"2025-07-08T13:14:16","date_gmt":"2025-07-08T11:14:16","guid":{"rendered":"https:\/\/www.ig.cas.cz\/?p=41750"},"modified":"2025-07-08T13:16:07","modified_gmt":"2025-07-08T11:16:07","slug":"hematite-responds-sensitively-to-deformation","status":"publish","type":"post","link":"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/","title":{"rendered":"Hematite responds sensitively to deformation"},"content":{"rendered":"<p>Rocks containing iron oxides can preserve a&nbsp;magnetic record of the Earth&#8217;s&nbsp;magnetic field history, the age of the rock, and the processes that have affected it. The magnetic properties of these rocks provide information about the composition, size, shape, and arrangement of the oxides. Often, many of these parameters are measured in only one direction and are assumed to be directionally independent (isotropy). In collaboration with scientists from Austria and Germany, our colleagues have described a&nbsp;significant change in the magnetic properties of massive natural hematite ore sample due to torsional deformation. This deformation process converted a&nbsp;portion of the magnetically hard hematite into magnetically soft, ultrafine magnetite particles. This transformation is accompanied by pronounced magnetic anisotropy, meaning the properties depend on the direction of measurement. These results will impact the interpretation of the magnetic records of geological processes in hematite-bearing rocks.<\/p>\n<p>The paper has been published in the prestigious <a href=\"http:\/\/dx.doi.org\/10.1029\/2024JB031033\">Journal of Geophysical Research: Solid Earth<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-41751 size-large\" src=\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all-1024x397.png\" alt=\"\" width=\"1024\" height=\"397\" srcset=\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all-980x380.png 980w, https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all-480x186.png 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/p>\n<p><em><strong>FORC diagrams (coercivity spectra) and major hysteresis loops of deformed hematite sample measured in three perpendicular directions.<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rocks containing iron oxides can preserve a&nbsp;magnetic record of the Earth&#8217;s&nbsp;magnetic field history, the age of the rock, and the processes that have affected it. The magnetic properties of these rocks provide information about the composition, size, shape, and arrangement of the oxides. Often, many of these parameters are measured in only one direction and [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-41750","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hematite responds sensitively to deformation - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hematite responds sensitively to deformation - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.\" \/>\n<meta property=\"og:description\" content=\"Rocks containing iron oxides can preserve a&nbsp;magnetic record of the Earth&#8217;s&nbsp;magnetic field history, the age of the rock, and the processes that have affected it. The magnetic properties of these rocks provide information about the composition, size, shape, and arrangement of the oxides. Often, many of these parameters are measured in only one direction and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/\" \/>\n<meta property=\"og:site_name\" content=\"Dom\u016f\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/GFUAVCR\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-08T11:14:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-08T11:16:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2113\" \/>\n\t<meta property=\"og:image:height\" content=\"819\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Lucie Crippa\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lucie Crippa\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/\",\"url\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/\",\"name\":\"Hematite responds sensitively to deformation - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.\",\"isPartOf\":{\"@id\":\"https:\/\/www.ig.cas.cz\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all-1024x397.png\",\"datePublished\":\"2025-07-08T11:14:16+00:00\",\"dateModified\":\"2025-07-08T11:16:07+00:00\",\"author\":{\"@id\":\"https:\/\/www.ig.cas.cz\/#\/schema\/person\/79bf33ef91a2f289567fba1d2a66ba44\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/#primaryimage\",\"url\":\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all-1024x397.png\",\"contentUrl\":\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2025\/07\/fig-8-deformed-all-1024x397.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\u016f\",\"item\":\"https:\/\/www.ig.cas.cz\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Hematite responds sensitively to deformation\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.ig.cas.cz\/#website\",\"url\":\"https:\/\/www.ig.cas.cz\/\",\"name\":\"Dom\u016f\",\"description\":\"Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.ig.cas.cz\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.ig.cas.cz\/#\/schema\/person\/79bf33ef91a2f289567fba1d2a66ba44\",\"name\":\"Lucie Crippa\",\"url\":\"https:\/\/www.ig.cas.cz\/en\/author\/crippa\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Hematite responds sensitively to deformation - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.ig.cas.cz\/en\/hematite-responds-sensitively-to-deformation\/","og_locale":"en_US","og_type":"article","og_title":"Hematite responds sensitively to deformation - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.","og_description":"Rocks containing iron oxides can preserve a&nbsp;magnetic record of the Earth&#8217;s&nbsp;magnetic field history, the age of the rock, and the processes that have affected it. The magnetic properties of these rocks provide information about the composition, size, shape, and arrangement of the oxides. 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