{"id":47729,"date":"2024-06-03T23:37:16","date_gmt":"2024-06-03T23:37:16","guid":{"rendered":"https:\/\/gifex.com\/fr\/?post_type=ficha&#038;p=47729"},"modified":"2024-06-05T18:11:10","modified_gmt":"2024-06-05T18:11:10","slug":"carte-geologique-de-l-angola","status":"publish","type":"ficha","link":"https:\/\/gifex.com\/fr\/fichier\/carte-geologique-de-l-angola\/","title":{"rendered":"Carte g\u00e9ologique de l&#8217;Angola"},"content":{"rendered":"<p style=\"text-align: center;\"><label style=\"font-size: 15px;\">Carte g\u00e9ologique de l&#8217;Angola.<\/label><\/p>\n<p>La g\u00e9ologie de l&#8217;Angola comprend de vastes zones de roches d&#8217;\u00e2ge pr\u00e9cambrien. L&#8217;ouest du pays est caract\u00e9ris\u00e9 par des roches m\u00e9ta-s\u00e9dimentaires d&#8217;\u00e2ge prot\u00e9rozo\u00efque comprenant des tillites attribu\u00e9es au syst\u00e8me Bembe. Au-dessus de ceux-ci se trouvent un \u00e9pais tas de calcaires et d&#8217;autres s\u00e9diments marins d\u00e9pos\u00e9s au cours des \u00e9poques M\u00e9sozo\u00efque et C\u00e9nozo\u00efque. Au milieu de la s\u00e9quence prot\u00e9rozo\u00efque se trouvent des zones de socle cristallin datant de l&#8217;Arch\u00e9en. D&#8217;autres roches du socle arch\u00e9ennes forment le craton du Kasa\u00ef, dans le nord-est de l&#8217;Angola. Au nord, au sein du Cassanje Graben se trouvent des s\u00e9diments clastiques et des roches volcaniques du supergroupe du Karoo. Les kimberlites et les carbonatites r\u00e9sultant de l&#8217;activit\u00e9 magmatique au cours de la p\u00e9riode du Karoo se trouvent le long d&#8217;une ligne nord-est-sud-ouest \u00e0 travers le pays. Les s\u00e9diments continentaux du groupe du Kalahari sont r\u00e9pandus dans l&#8217;est de l&#8217;Angola.<\/p>\n<p><strong>Fossiles<\/strong><\/p>\n<figure id=\"attachment_47733\" aria-describedby=\"caption-attachment-47733\" style=\"width: 360px\" class=\"wp-caption alignright\"><a href=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-sols-de-l-Angola.png\" target=\"_blank\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-47733\" title=\"Carte des sols de l'Angola (FAO 1997).\" src=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-sols-de-l-Angola-300x189.png\" alt=\"Carte des sols de l'Angola (FAO 1997).\" width=\"360\" height=\"227\" srcset=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-sols-de-l-Angola-300x189.png 300w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-sols-de-l-Angola-1024x647.png 1024w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-sols-de-l-Angola-768x485.png 768w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-sols-de-l-Angola.png 1351w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/a><figcaption id=\"caption-attachment-47733\" class=\"wp-caption-text\"><label style=\"font-size: 15px;\">Carte g\u00e9n\u00e9ralis\u00e9e des sols de l&#8217;Angola (FAO 1997).<\/label><\/figcaption><\/figure>\n<p>Le M\u00e9sozo\u00efque de l&#8217;Angola est tr\u00e8s riche en vert\u00e9br\u00e9s fossiles, notamment en reptiles marins comme les tortues (Angolachelys), les mosasaures et les pl\u00e9siosaures, li\u00e9s \u00e0 l&#8217;ouverture de l&#8217;Atlantique Sud. Seuls quelques fossiles terrestres ont \u00e9t\u00e9 collect\u00e9s, dont l&#8217;unique dinosaure adamastor angolais.<\/p>\n<p><strong>G\u00e9orisques<\/strong><\/p>\n<p>Les aquif\u00e8res et les eaux souterraines ont \u00e9t\u00e9 pollu\u00e9s en raison des activit\u00e9s mini\u00e8res dans le pays.<\/p>\n<p><strong>G\u00e9ologie \u00e9conomique<\/strong><\/p>\n<p>La plus grande partie des revenus de l&#8217;Angola provient de la production p\u00e9troli\u00e8re et, en 2008, le pays \u00e9tait le deuxi\u00e8me producteur de p\u00e9trole brut d&#8217;Afrique. L&#8217;Angola est \u00e9galement le quatri\u00e8me producteur de diamants en Afrique. Les diamants proviennent \u00e0 la fois de gisements alluviaux et de centaines de chemin\u00e9es de kimberlite diss\u00e9min\u00e9es le long d&#8217;une ligne nord-est-sud-ouest \u00e0 travers l&#8217;Angola. Le pays est \u00e9galement un producteur d&#8217;or, la source la plus importante \u00e9tant les alluvions provenant des roches vertes arch\u00e9ennes, principalement autour du Cabinda. L&#8217;Angola poss\u00e8de \u00e9galement, encore largement inexploit\u00e9es, des r\u00e9serves de cuivre, de gypse, de phosphate, de minerai de fer, de mangan\u00e8se et d&#8217;autres m\u00e9taux de base.<\/p>\n<div style=\"clear: both; display: inline-block; width: 100%;\">\n<div class=\"row\">\n<div class=\"col-sm\">\n<figure id=\"attachment_47732\" aria-describedby=\"caption-attachment-47732\" style=\"width: 400px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola.png\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"wp-image-47732\" title=\"Carte g\u00e9ologique du sud-ouest de l'Angola.\" src=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola-300x202.png\" alt=\"Carte g\u00e9ologique du sud-ouest de l'Angola.\" width=\"400\" height=\"270\" srcset=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola-300x202.png 300w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola-1024x690.png 1024w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola-768x518.png 768w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola-1536x1035.png 1536w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola-1600x1078.png 1600w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-geologique-du-sud-ouest-de-l-Angola.png 1862w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><figcaption id=\"caption-attachment-47732\" class=\"wp-caption-text\"><label style=\"font-size: 15px;\">Carte bas\u00e9e sur un syst\u00e8me d&#8217;information g\u00e9ographique (SIG) montrant la g\u00e9ologie r\u00e9gionale du sud-ouest de l&#8217;Angola (d&#8217;apr\u00e8s Carvalho &amp; Alves 1993) avec plusieurs villes pour r\u00e9f\u00e9rence. La carte en m\u00e9daillon montre la position des principales localit\u00e9s et des domaines tectoniques du sud de l&#8217;Angola tels que reconnus par Carvalho et al. (2000); l&#8217;encadr\u00e9 d\u00e9crit la zone couverte par la carte g\u00e9ologique.<\/label><\/figcaption><\/figure>\n<\/div>\n<div class=\"col-sm\">\n<figure id=\"attachment_47806\" aria-describedby=\"caption-attachment-47806\" style=\"width: 400px\" class=\"wp-caption alignright\"><a href=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola.jpg\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"wp-image-47806\" title=\"Carte des ressources g\u00e9ologiques de l'Angola.\" src=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola-296x300.jpg\" alt=\"Carte des ressources g\u00e9ologiques de l'Angola.\" width=\"400\" height=\"405\" srcset=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola-296x300.jpg 296w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola-1011x1024.jpg 1011w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola-768x778.jpg 768w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola-300x304.jpg 300w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-des-ressources-geologiques-de-l-Angola.jpg 1252w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><figcaption id=\"caption-attachment-47806\" class=\"wp-caption-text\"><label style=\"font-size: 15px;\">Carte des ressources g\u00e9ologiques de l&#8217;Angola.<\/label><\/figcaption><\/figure>\n<\/div>\n<div class=\"col-sm\">\n<figure id=\"attachment_47741\" aria-describedby=\"caption-attachment-47741\" style=\"width: 400px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola.png\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-47741\" title=\"Carte de sismicit\u00e9 de l'Angola.\" src=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola-212x300.png\" alt=\"Carte de sismicit\u00e9 de l'Angola.\" width=\"400\" height=\"566\" srcset=\"https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola-212x300.png 212w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola-724x1024.png 724w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola-768x1087.png 768w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola-300x425.png 300w, https:\/\/gifex.com\/fr\/wp-content\/uploads\/47729\/Carte-de-sismicite-de-l-Angola.png 850w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><figcaption id=\"caption-attachment-47741\" class=\"wp-caption-text\"><label style=\"font-size: 15px;\">Carte de sismicit\u00e9 de l&#8217;Angola avec zones sismiques.<\/label><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>La g\u00e9ologie de l&#8217;Angola comprend de vastes zones de roches d&#8217;\u00e2ge pr\u00e9cambrien. L&#8217;ouest du pays est caract\u00e9ris\u00e9 par des roches m\u00e9ta-s\u00e9dimentaires d&#8217;\u00e2ge &#8230;<\/p>\n","protected":false},"author":1,"featured_media":47730,"template":"","categoria_ficha":[191],"class_list":["post-47729","ficha","type-ficha","status-publish","has-post-thumbnail","hentry","categoria_ficha-cartes-de-l-angola"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Carte g\u00e9ologique de l&#039;Angola - Gifex<\/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:\/\/gifex.com\/fr\/fichier\/carte-geologique-de-l-angola\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Carte g\u00e9ologique de l&#039;Angola - Gifex\" \/>\n<meta property=\"og:description\" content=\"La g\u00e9ologie de l&#039;Angola comprend de vastes zones de roches d&#039;\u00e2ge pr\u00e9cambrien. 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