American Rare Earths' Mineral Resource Update for Cowboy State Mine Area Reclassifies Indicated Resources

MT Newswires Live

Nov 19, 2025

American Rare Earths (ASX:ARR) updated its mineral resource estimate for the Cowboy State Mine area within its Hallack Creek rare earths project in Wyoming, reclassifying indicated resources by 68.4 million tonnes, according to a Wednesday Australian bourse filing.

The updated mineral resource estimate for the area is around 547.5 million tonnes using a total rare earths oxide cut-off grade of 1,000 parts per million (ppm), the filing said. The indicated resource was 391.4 million tonnes, and the inferred resource was 156.1 million tonnes.

Additional mapping associated with the channel sampling expanded the resource area to increase the Cowboy State Mine mineral resource estimate by around 4.5 million tonnes, per the filing.

A standout sample from summer exploration and mapping in the area contained a record high assay grade for the entire project, with a total rare earth oxide grade of 13,816 ppm.

American Rare Earths' shares rose past 2% in recent trading on Wednesday.

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The indicated resource was 391.4 million tonnes, and the inferred resource was 156.1 million tonnes.</p><p>Additional mapping associated with the channel sampling expanded the resource area to increase the Cowboy State Mine mineral resource estimate by around 4.5 million tonnes, per the filing.</p><p>A standout sample from summer exploration and mapping in the area contained a record high assay grade for the entire project, with a total rare earth oxide grade of 13,816 ppm.</p><p>American Rare Earths' shares rose past 2% in recent trading on Wednesday.</p></body></html>","source":"mtnewswires_news","html":"<!DOCTYPE html>\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no\"/>\n<meta name=\"format-detection\" content=\"telephone=no,email=no,address=no\" />\n<title>American Rare Earths' Mineral Resource Update for Cowboy State Mine Area Reclassifies Indicated Resources</title>\n<style type=\"text/css\">\na,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,\nem,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,\nobject,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{ font:inherit;margin:0;padding:0;vertical-align:baseline;border:0 }\nbody{ font-size:16px; line-height:1.5; color:#999; background:transparent; }\n.wrapper{ overflow:hidden;word-break:break-all;padding:10px; }\nh1,h2{ font-weight:normal; line-height:1.35; margin-bottom:.6em; }\nh3,h4,h5,h6{ line-height:1.35; margin-bottom:1em; }\nh1{ font-size:24px; }\nh2{ font-size:20px; }\nh3{ font-size:18px; }\nh4{ font-size:16px; }\nh5{ font-size:14px; }\nh6{ font-size:12px; }\np,ul,ol,blockquote,dl,table{ margin:1.2em 0; }\nul,ol{ margin-left:2em; }\nul{ list-style:disc; }\nol{ list-style:decimal; }\nli,li p{ margin:10px 0;}\nimg{ max-width:100%;display:block;margin:0 auto 1em; }\nblockquote{ color:#B5B2B1; border-left:3px solid #aaa; padding:1em; }\nstrong,b{font-weight:bold;}\nem,i{font-style:italic;}\ntable{ width:100%;border-collapse:collapse;border-spacing:1px;margin:1em 0;font-size:.9em; }\nth,td{ padding:5px;text-align:left;border:1px solid #aaa; }\nth{ font-weight:bold;background:#5d5d5d; }\n.symbol-link{font-weight:bold;}\n/* header{ border-bottom:1px solid #494756; } */\n.title{ margin:0 0 8px;line-height:1.3;color:#ddd; }\n.meta {color:#5e5c6d;font-size:13px;margin:0 0 .5em; }\na{text-decoration:none; color:#2a4b87;}\n.meta .head { display: inline-block; overflow: hidden}\n.head .h-thumb { width: 30px; height: 30px; margin: 0; padding: 0; border-radius: 50%; float: left;}\n.head .h-content { margin: 0; padding: 0 0 0 9px; float: left;}\n.head .h-name {font-size: 13px; color: #eee; margin: 0;}\n.head .h-time {font-size: 11px; color: #7E829C; margin: 0;line-height: 11px;}\n.small {font-size: 12.5px; display: inline-block; transform: scale(0.9); -webkit-transform: scale(0.9); transform-origin: left; -webkit-transform-origin: left;}\n.smaller {font-size: 12.5px; display: inline-block; transform: scale(0.8); -webkit-transform: scale(0.8); transform-origin: left; -webkit-transform-origin: left;}\n.bt-text {font-size: 12px;margin: 1.5em 0 0 0}\n.bt-text p {margin: 0}\n</style>\n</head>\n<body>\n<div class=\"wrapper\">\n<header>\n<h2 class=\"title\">\nAmerican Rare Earths' Mineral Resource Update for Cowboy State Mine Area Reclassifies Indicated Resources\n</h2>\n\n<h4 class=\"meta\">\n\n\n<a class=\"head\" href=\"https://laohu8.com/wemedia/1092851196\">\n\n\n<div class=\"h-thumb\" style=\"background-image:url(https://community-static.tradeup.com/news/3002d84abbd5ace3c99397c7f95b8d4e);background-size:cover;\"></div>\n\n<div class=\"h-content\">\n<p class=\"h-name\">MT Newswires Live </p>\n<p class=\"h-time\">2025-11-19 11:39</p>\n</div>\n\n</a>\n\n\n</h4>\n\n</header>\n<article>\n<html><body><p> <a href=\"https://laohu8.com/S/ARR.AU\">American Rare Earths</a> (ASX:ARR) updated its mineral resource estimate for the Cowboy State Mine area within its Hallack Creek rare earths project in Wyoming, reclassifying indicated resources by 68.4 million tonnes, according to a Wednesday Australian bourse filing.</p><p>The updated mineral resource estimate for the area is around 547.5 million tonnes using a total rare earths oxide cut-off grade of 1,000 parts per million (ppm), the filing said. The indicated resource was 391.4 million tonnes, and the inferred resource was 156.1 million tonnes.</p><p>Additional mapping associated with the channel sampling expanded the resource area to increase the Cowboy State Mine mineral resource estimate by around 4.5 million tonnes, per the filing.</p><p>A standout sample from summer exploration and mapping in the area contained a record high assay grade for the entire project, with a total rare earth oxide grade of 13,816 ppm.</p><p>American Rare Earths' shares rose past 2% in recent trading on Wednesday.</p></body></html>\n\n</article>\n</div>\n</body>\n</html>\n","isBrief":false,"type":0,"news_type":1,"symbol":"BK4135","symbol_name":"资产管理与托管银行","start_time":0,"source_url":"https://www.mtnewswires.com/","article_id":"2584999060","we_media_id":"1092851196","thumbnails":[],"rights":null,"url":"https://stock-news.laohu8.com/highlight/detail?id=2584999060","pubTimestamp":1763523566,"columns":[],"sourceInfo":{"source_id":"mtnewswires_news","name":"MT Newswires"},"weMediaInfo":{"media_name":"MT Newswires Live","introduction":"The most recognized names in North America, Europe and Asia rely on MT Newswires to power their applications. 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The indicated resource was 391.4 million tonnes, and the inferred resource was 156.1 million tonnes.Additional mapping associated with the channel sampling expanded the resource area to increase the Cowboy State Mine mineral resource estimate by around 4.5 million tonnes, per the filing.A standout sample from summer exploration and mapping in the area contained a record high assay grade for the entire project, with a total rare earth oxide grade of 13,816 ppm.American Rare Earths' shares rose past 2% in recent trading on Wednesday.","collect":0,"end_time":0,"defaultTopTitle":"","property":[],"viewcount":null,"language":"en","relate_stocks":{"BK4135":"资产管理与托管银行","LU1894683264.USD":"AMUNDI FUNDS US EQUITY RESEARCH VALUE \"A2\" (USD) ACC","BK7095":"多种金属与采矿","IE00BGHQF748.EUR":"GUINNESS GLOBAL MONEY MANAGERS \"C\" (EUR) ACC","BK4107":"财产与意外伤害保险","BK4588":"碎股","BK4117":"多元化保险","STT":"道富银行","AFG":"美国金融集团有限公司","IE00B64PRP62.GBP":"GUINNESS GLOBAL MONEY MANAGERS \"C\" (GBP) ACC","BK4585":"ETF&股票定投概念","LU1883839398.USD":"AMUNDI FUNDS INCOME OPPORTUNITIES \"A2\" (USD) ACC","LU0061475181.USD":"THREADNEEDLE (LUX) AMERICAN \"AU\" (USD) ACC","LU1894683348.USD":"AMUNDI FUNDS US EQUITY RESEARCH VALUE \"A2\" (USD) INC","IE00B3QW5Z07.USD":"GUINNESS GLOBAL MONEY MANAGERS \"C\" (USD) ACC","ARR.AU":"American Rare Earths Ltd","IE0034235188.USD":"PINEBRIDGE GLOBAL FOCUS EQUITY \"A\" (USD) ACC"},"translate_title":"美国稀土公司对牛仔州矿区的矿产资源更新对指示资源进行了重新分类","themeId":null,"isJumpTheme":false,"ttsUrl":null,"symbols_score_info":{"AFG":1.5,"ARR.AU":1,"STT":1.5},"content_text":"American Rare Earths (ASX:ARR) updated its mineral resource estimate for the Cowboy State Mine area within its Hallack Creek rare earths project in Wyoming, reclassifying indicated resources by 68.4 million tonnes, according to a Wednesday Australian bourse filing.The updated mineral resource estimate for the area is around 547.5 million tonnes using a total rare earths oxide cut-off grade of 1,000 parts per million (ppm), the filing said. The indicated resource was 391.4 million tonnes, and the inferred resource was 156.1 million tonnes.Additional mapping associated with the channel sampling expanded the resource area to increase the Cowboy State Mine mineral resource estimate by around 4.5 million tonnes, per the filing.A standout sample from summer exploration and mapping in the area contained a record high assay grade for the entire project, with a total rare earth oxide grade of 13,816 ppm.American Rare Earths' shares rose past 2% in recent trading on Wednesday.","kind":"highlight","is_publish_news":true,"is_publish_highlight":false,"is_publish_live":false,"is_publish_wemedia":null,"editions":null,"column":"","sentiment":"0","news_tag":"","news_rank":0,"symbols":[],"gpt_button":0,"need_auth":false,"code":"91000000","status":"200"}}}