{"id":604,"date":"2014-03-19T14:02:59","date_gmt":"2014-03-19T13:02:59","guid":{"rendered":"https:\/\/asal.dz\/?p=604"},"modified":"2018-12-24T09:59:02","modified_gmt":"2018-12-24T08:59:02","slug":"analyse-des-structures-et-des-litho-facies-de-latlas-saharien-region-del-bayadh-a-partir-des-images-alsat-2a","status":"publish","type":"post","link":"https:\/\/asal.dz\/?p=604","title":{"rendered":"Analyse des structures et des litho-faci\u00e8s de l\u2019Atlas Saharien (r\u00e9gion d\u2019El Bayadh), \u00e0 partir des images Alsat-2A"},"content":{"rendered":"<p class=\"Style125\" align=\"center\"><strong>Ahmed SAAD, Chercheur au Centre des Techniques Spatiales d\u2019Arzew (CTS\/ASAL)<\/strong><\/p>\n<p class=\"Style125\" align=\"justify\">Les images multispectrales du satellite Alsat-2A prises le 27-01-2014, couvrent les structures g\u00e9ologiques de la r\u00e9gion d\u2019El Bayadh\u00a0 appartenant\u00a0 \u00e0 l\u2019Atlas Saharien [Figure 1]. Ce dernier correspond \u00e0 une cha\u00eene intracratonique pliss\u00e9e qui\u00a0 s\u2019interpose entre deux domaines pal\u00e9o g\u00e9ographiquement stables\u00a0: le domaine des Hautes plaines oranaises au Nord et le domaine Saharien au Sud.<\/p>\n<p class=\"Style125\" align=\"justify\">La couverture s\u00e9dimentaire\u00a0 est \u00a0affect\u00e9e\u00a0 par une tectonique\u00a0 souple qui est mat\u00e9rialis\u00e9e par des anticlinaux coffr\u00e9s et par des synclinaux larges et perch\u00e9s.<\/p>\n<p class=\"Style125\" align=\"justify\">Les anticlinaux allong\u00e9s, coffr\u00e9s \u00e0 flancs redress\u00e9s,\u00a0 d\u2019axes sensiblement parall\u00e8les aux directions de la chaine et des synclinaux perch\u00e9s \u00e0 fonds larges [Figure 2], repr\u00e9sentent le \u00ab\u00a0style atlasique\u00a0\u00bb. Ces diff\u00e9rentes structures sont le r\u00e9sultat de ph\u00e9nom\u00e8nes tectoniques qui se sont manifest\u00e9s au cours des \u00e8res g\u00e9ologiques du M\u00e9sozo\u00efque et du C\u00e9nozo\u00efque\u00a0 suivis de rejeux au cours du quaternaire.<\/p>\n<p class=\"Style125\" align=\"justify\">La tectonique cassante qui affecte cette couverture, est mat\u00e9rialis\u00e9e par des failles de plusieurs directions. Les failles de directions\u00a0 NE-SW et celles de directions E-W, contr\u00f4lent la morphologie de l\u2019affleurement Triasique.<\/p>\n<p class=\"Style125\" align=\"justify\">Le Trias appara\u00eet en diapir au c\u0153ur des structures anticlinales ou en travers des plissements atlasiques de direction NE-SW. Le Diapir observ\u00e9 sur le Djebel Mouileh [Figures 3 et 4], est constitu\u00e9 d\u2019un m\u00e9lange d\u2019argile de couleur brune et de sel massif, dans lesquels on y trouve des \u00e9pointements de roches vertes (roches magmatiques). La couleur bleue du diapir visible sur l\u2019image Alsat-2A, est donn\u00e9e par les argiles et les sels lessiv\u00e9s par les eaux pluviales.<\/p>\n<p class=\"Style125\" align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.asal.dz\/pictures\/geol2014.JPG\" width=\"680\" height=\"527\" border=\"1\" \/><\/p>\n<p class=\"Style125\" align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.asal.dz\/pictures\/geol20142.JPG\" width=\"680\" height=\"495\" border=\"1\" \/><\/p>\n<p class=\"Style125\" align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.asal.dz\/pictures\/geol20143.JPG\" width=\"680\" height=\"521\" border=\"1\" \/><\/p>\n<p class=\"Style125\" align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.asal.dz\/pictures\/geol20144.JPG\" width=\"680\" height=\"491\" border=\"1\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ahmed SAAD, Chercheur au Centre des Techniques Spatiales d\u2019Arzew (CTS\/ASAL) Les images multispectrales du satellite Alsat-2A prises le 27-01-2014, couvrent les structures g\u00e9ologiques de la r\u00e9gion d\u2019El Bayadh\u00a0 appartenant\u00a0 \u00e0 l\u2019Atlas Saharien [Figure 1]. Ce dernier correspond \u00e0 une cha\u00eene intracratonique pliss\u00e9e qui\u00a0 s\u2019interpose entre deux domaines pal\u00e9o g\u00e9ographiquement stables\u00a0: le domaine des Hautes plaines [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","footnotes":""},"categories":[3],"tags":[],"class_list":["post-604","post","type-post","status-publish","format-standard","hentry","category-actualites"],"_links":{"self":[{"href":"https:\/\/asal.dz\/index.php?rest_route=\/wp\/v2\/posts\/604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/asal.dz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/asal.dz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/asal.dz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/asal.dz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=604"}],"version-history":[{"count":0,"href":"https:\/\/asal.dz\/index.php?rest_route=\/wp\/v2\/posts\/604\/revisions"}],"wp:attachment":[{"href":"https:\/\/asal.dz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/asal.dz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/asal.dz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}