{"id":1958,"date":"2023-05-03T11:14:45","date_gmt":"2023-05-03T09:14:45","guid":{"rendered":"https:\/\/www.aucoffre.com\/academie\/?p=1958"},"modified":"2023-05-03T11:14:47","modified_gmt":"2023-05-03T09:14:47","slug":"mines-or","status":"publish","type":"post","link":"https:\/\/www.aucoffre.com\/academie\/mines-or\/","title":{"rendered":"Mines d\u2019or\u00a0: o\u00f9 se trouvent les principaux gisements d\u2019or\u00a0dans le monde\u00a0?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Trouver un filon d\u2019or dans votre sous-sol&nbsp;? Nombreux sont ceux qui en r\u00eavent. Mais il est s\u00fbrement bien plus probable de trouver des <a href=\"https:\/\/www.aucoffre.com\/academie\/pieces-cours-legal\/\">pi\u00e8ces d\u2019or<\/a> enfouies dans votre jardin, qu\u2019un gisement de m\u00e9tal pr\u00e9cieux ! D\u2019autant plus que les plus importantes <a href=\"https:\/\/www.aucoffre.com\/academie\/extraction-or-modele-a-bout-de-souffle\/\">mines d\u2019or dans le monde<\/a> se trouvent <strong>en Afrique du Sud, au Ghana, au P\u00e9rou et en Indon\u00e9sie.<\/strong> Il existe aussi des gisements importants <strong>au Canada, en Russie, aux \u00c9tats-Unis et en Chine<\/strong>. Suivez le guide, l\u2019Acad\u00e9mie AuCOFFRE vous emm\u00e8ne visiter les plus grandes mines d\u2019or du monde.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mieux comprendre comment se forment les gisements d\u2019or&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019or est l\u2019un des <a href=\"https:\/\/www.aucoffre.com\/academie\/origine-or\/\">m\u00e9taux les plus rares sur terre&nbsp;<\/a>: c\u2019est ce qui en fait sa valeur. Il est g\u00e9n\u00e9ralement pr\u00e9sent \u00e0 l\u2019\u00e9tat de traces dans le sous-sol. Des d\u00e9p\u00f4ts, ou gisements, peuvent n\u00e9anmoins se former : c\u2019est l\u2019ion trisulfure S3, une forme de soufre, qui joue le r\u00f4le de transporteur d\u2019or. C\u2019est ce que prouvent des recherches men\u00e9es en 2015 par des g\u00e9ologues, des chimistes et des physiciens du Centre national de la recherche scientifique (CNRS).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au fil des si\u00e8cles, les gisements les moins profonds ont \u00e9t\u00e9 exploit\u00e9s en Europe, en Afrique ou en Asie, notamment en Inde. Cette exploitation a fa\u00e7onn\u00e9 le paysage, comme \u00e0 Las Medulas (Espagne). Mais \u00e0 mesure que l\u2019or s\u2019est rar\u00e9fi\u00e9 en surface, il a fallu <strong>creuser plus profond pour trouver des filons<\/strong>. Lors de la ru\u00e9e vers l\u2019or en Californie \u00e0 partir de 1848 par exemple, les chercheurs d\u2019or ont d\u2019abord pu concentrer leurs efforts sur les roches et min\u00e9raux pr\u00e9sents en surface\u2026 avant de prendre pelle et pioche pour creuser des galeries.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quelles sont les plus importantes mines d\u2019or dans le monde&nbsp;?&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vous retrouverez sur la carte ci-dessous les mines d\u2019or les plus importantes.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Tous les gisements exploit\u00e9s ne figurent pas sur la carte.<\/em><\/p>\n\n\n\n<iframe src=\"https:\/\/www.google.com\/maps\/d\/embed?mid=1cJYUPxFs_HVBKa2YPdRKDfYH2Hs3XYk&#038;ehbc=2E312F\" width=\"640\" height=\"480\"><\/iframe>\n\n\n\n<h3 class=\"wp-block-heading\">Les mines d\u2019Afrique du Sud&nbsp;: le plus important bassin aurif\u00e8re<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En Afrique du Sud, <strong>le bassin du Witwatersrand<\/strong> regroupe de nombreuses mines.&nbsp; Cette concentration de filons aurif\u00e8res est due aux particularit\u00e9s g\u00e9ologiques de la zone d\u2019extraction. Pr\u00e8s de <strong>deux milliards d\u2019onces d\u2019or<\/strong> auraient d\u00e9j\u00e0 \u00e9t\u00e9 extraits dans le seul bassin sud-africain.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Les mines les plus profondes du monde sont en Afrique du Sud<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les mines du bassin du Witwatersrand figurent parmi celles qui produisent le plus d\u2019or chaque ann\u00e9e&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Driefontein&nbsp;;<\/li>\n\n\n\n<li>Kloof&nbsp;;<\/li>\n\n\n\n<li>Noligwa&nbsp;;<\/li>\n\n\n\n<li>Mponeng&nbsp;;<\/li>\n\n\n\n<li>Beatrix&nbsp;;<\/li>\n\n\n\n<li>Val Reefs&nbsp;(Moab Khotsong)&nbsp;;<\/li>\n\n\n\n<li>Tau Tona&nbsp;;<\/li>\n\n\n\n<li>Kopanang&nbsp;;<\/li>\n\n\n\n<li>Target.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Elles sont aussi les plus profondes. La <strong>mine de Tau Tona<\/strong>, ouverte depuis 1957, plonge ses galeries jusqu\u2019\u00e0 3&nbsp;900 m\u00e8tres de profondeur. Un record quand on sait que l\u2019exploitation aurif\u00e8re \u00e0 grande profondeur implique des risques importants. La temp\u00e9rature peut d\u00e9passer les 60\u00b0C \u00e0 plus de 3,5 km de profondeur, et la pression exerc\u00e9e sur les roches avoisine 10&nbsp;000 tonnes par m\u00e8tre carr\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">La production aurif\u00e8re d\u2019Afrique du Sud en baisse depuis 2010<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Depuis pr\u00e8s d\u2019une douzaine d\u2019ann\u00e9es, la production des mines d\u2019or sud-africaines est en baisse. En 2010, la production aurif\u00e8re avoisinait 210 tonnes selon le <a href=\"https:\/\/www.gold.org\/goldhub\/data\/gold-production-by-country\">World Gold Council<\/a>. Elle \u00e9tait de <strong>113,6 tonnes en 2022<\/strong>&nbsp;: moins que <strong>le Ghana (129,2 tonnes d\u2019or)<\/strong>, dont la production est en augmentation constante (<strong>mines d\u2019Ahafo, de Damang et d\u2019Asanko<\/strong>).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Des mines en Chine, en Russie, au P\u00e9rou et en Indon\u00e9sie<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Les mines d\u2019or de Chine<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La Chine produit \u00e0 elle seule plus de 300 tonnes d\u2019or par an, et sa production aurif\u00e8re a m\u00eame atteint <strong>463 tonnes en 2016 <\/strong>selon le World Gold Council. La mine la plus importante est celle de <strong>Shaxi, \u00e0 Anhui<\/strong>, qui produit aussi du cuivre&nbsp;: 20 tonnes d\u2019or en 2020. Quatre autres mines figurent parmi les plus importantes en Chine&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dexing&nbsp;;<\/li>\n\n\n\n<li>Dayingezhuang&nbsp;;<\/li>\n\n\n\n<li>Shanshandao&nbsp;;<\/li>\n\n\n\n<li>Zaozigou.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019extraction d\u2019or en Chine se concentre surtout \u00e0 l\u2019est du pays.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">En Russie, des mines \u00e0 ciel ouvert\u2026 et des nouveaux gisements<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">330 tonnes d\u2019or extraites en 2022&nbsp;: la Russie figure parmi les producteurs majeurs du m\u00e9tal pr\u00e9cieux. Les mines les plus importantes sont situ\u00e9es <strong>en Sib\u00e9rie.<\/strong> Parmi elles, <strong>la mine d\u2019Olimpiada<\/strong>&nbsp;: elle a la particularit\u00e9 d\u2019\u00eatre l\u2019une des plus grandes mines d\u2019or \u00e0 ciel ouvert\u2026 et elle repr\u00e9sente 20 % de la production aurif\u00e8re russe.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En 2020, la soci\u00e9t\u00e9 mini\u00e8re russe Polyus a \u00e9galement annonc\u00e9 la d\u00e9couverte d\u2019un gisement encore inexploit\u00e9 \u00e0 <strong>Sukhoi Log<\/strong>, dans la r\u00e9gion d\u2019Irkoutsk.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Muruntau&nbsp;en Ouzb\u00e9kistan : la plus grande mine d\u2019or \u00e0 ciel ouvert&nbsp;&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dans le d\u00e9sert de Kyzyl Kum, <strong>la mine de Muruntau<\/strong> est la plus grande exploitation aurif\u00e8re \u00e0 ciel ouvert. La carri\u00e8re g\u00e9ante est creus\u00e9e depuis 1967 et elle atteint aujourd\u2019hui 565 m\u00e8tres de profondeur. Les experts estiment qu\u2019elle devrait plonger jusqu\u2019\u00e0 1&nbsp;000 m\u00e8tres pour atteindre l\u2019ensemble du gisement. L\u2019Ouzb\u00e9kistan a extrait <strong>104,9 tonnes d\u2019or en 2022<\/strong>&nbsp;: un chiffre en constante progression depuis une quinzaine d\u2019ann\u00e9es.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Au P\u00e9rou, la mine d\u2019or de Yanacocha<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Le P\u00e9rou concentre la plus forte activit\u00e9 aurif\u00e8re en Am\u00e9rique du Sud et Am\u00e9rique centrale. Le pays a extrait <strong>127 tonnes d\u2019or en 2022<\/strong>. Le Br\u00e9sil, avec 90 tonnes d\u2019or en 2022, figure en deuxi\u00e8me position sur la liste des pays producteurs d\u2019or sur le continent, selon le World Gold Council.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La majeure partie de cet or est extrait \u00e0 pr\u00e8s de 3&nbsp;500 m d\u2019altitude, dans la mine de Yanacocha. Pr\u00e8s de <strong>350&nbsp;000 onces d\u2019or<\/strong> sont sorties chaque ann\u00e9e de cette mine \u00e0 ciel ouvert.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Le Canada et les \u00c9tats-Unis figurent aussi parmi les producteurs majeurs<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aux \u00c9tats-Unis, l\u2019exploitation aurif\u00e8re ne s\u2019est pas arr\u00eat\u00e9e avec la <a href=\"https:\/\/www.aucoffre.com\/academie\/ruee-vers-lor-etats-unis\/\">fin de la Ru\u00e9e vers l\u2019or&nbsp;<\/a>! Les exploitations sont d\u00e9sormais surtout concentr\u00e9es dans le Nevada.&nbsp; La <strong>mine Goldstrike et la mine Carlin<\/strong> sont situ\u00e9es sur le m\u00eame gisement, juste au-dessus de Carlin, au nord du Nevada. Les galeries sont en partie sous terre, mais l\u2019exploitation se fait aussi \u00e0 ciel ouvert. La mine Carlin produit plus de <strong>70 tonnes d\u2019or<\/strong> chaque ann\u00e9e. Au total, les \u00c9tats-Unis ont extrait <strong>186,8 tonnes d\u2019or<\/strong> de leur sous-sol en 2022, un chiffre en baisse depuis 2010.&nbsp;L\u2019exploitation aurif\u00e8re est en revanche en hausse depuis une quinzaine d\u2019ann\u00e9es au Canada. La <strong>production en or du Canada<\/strong> a d\u00e9pass\u00e9 celle des \u00c9tats-Unis pour la premi\u00e8re en 2022, avec 192,9 tonnes extraites. La <strong>mine Malartic<\/strong> est l\u2019une des plus importantes, mais d\u2019autres gisements vont aussi \u00eatre exploit\u00e9s. C\u2019est le cas de la <strong>mine Blackwater<\/strong>, dont le permis d\u2019exploitation a \u00e9t\u00e9 approuv\u00e9 en mars 2023 par le gouvernement de Colombie-Britannique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trouver un filon d\u2019or dans votre sous-sol&nbsp;? Nombreux sont ceux qui en r\u00eavent. Mais il est s\u00fbrement bien plus probable de trouver des pi\u00e8ces d\u2019or enfouies dans votre jardin, qu\u2019un gisement de m\u00e9tal pr\u00e9cieux ! D\u2019autant plus que les plus importantes mines d\u2019or dans le monde se trouvent en Afrique du Sud, au Ghana, au [&hellip;]<\/p>\n","protected":false},"author":21,"featured_media":1959,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","jnews-multi-image_gallery":[],"jnews_single_post":{"subtitle":"","format":"standard","video":"","gallery":"","source_name":"","source_url":"","via_name":"","via_url":"","override_template":"0","override":[{"template":"8","single_blog_custom":"","parallax":"1","fullscreen":"0","layout":"no-sidebar-narrow","sidebar":"default-sidebar","second_sidebar":"default-sidebar","sticky_sidebar":"1","share_position":"bottom","share_float_style":"share-monocrhome","show_share_counter":"1","show_view_counter":"1","show_featured":"1","show_post_meta":"1","show_post_author":"0","show_post_author_image":"1","show_post_date":"1","post_date_format":"default","post_date_format_custom":"Y\/m\/d","show_post_category":"1","show_post_reading_time":"1","post_reading_time_wpm":"300","show_zoom_button":"0","zoom_button_out_step":"2","zoom_button_in_step":"3","show_post_tag":"1","show_prev_next_post":"1","show_popup_post":"1","number_popup_post":"2","show_author_box":"1","show_post_related":"1","show_inline_post_related":"0"}],"override_image_size":"0","image_override":[{"single_post_thumbnail_size":"crop-500","single_post_gallery_size":"crop-500"}],"trending_post":"0","trending_post_position":"meta","trending_post_label":"Trending","sponsored_post":"0","sponsored_post_label":"Sponsored by","sponsored_post_name":"","sponsored_post_url":"","sponsored_post_logo_enable":"0","sponsored_post_logo":"","sponsored_post_desc":"","disable_ad":"0"},"jnews_primary_category":{"id":"","hide":""},"jnews_social_meta":{"fb_title":"","fb_description":"","fb_image":"","twitter_title":"","twitter_description":"","twitter_image":""},"jnews_override_counter":{"override_view_counter":"0","view_counter_number":"0","override_share_counter":"0","share_counter_number":"0","override_like_counter":"0","like_counter_number":"0","override_dislike_counter":"0","dislike_counter_number":"0"},"footnotes":""},"categories":[80],"tags":[100,98,83],"niveau":[130,131],"class_list":["post-1958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-univers-metaux-precieux","tag-environnement","tag-industrie","tag-or","niveau-debutant","niveau-intermediaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mines d\u2019or\u00a0: o\u00f9 se trouvent les principaux gisements d\u2019or\u00a0dans le monde\u00a0?<\/title>\n<meta name=\"description\" content=\"Une mine d&#039;or est un site d&#039;extraction de l&#039;or. 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