{"id":180684,"date":"2026-05-18T06:27:10","date_gmt":"2026-05-18T06:27:10","guid":{"rendered":"https:\/\/www.europesays.com\/ee\/180684\/"},"modified":"2026-05-18T06:27:10","modified_gmt":"2026-05-18T06:27:10","slug":"aafrika-rebeneb-ka-lounast-loodus","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ee\/180684\/","title":{"rendered":"Aafrika rebeneb ka l\u00f5unast | Loodus"},"content":{"rendered":"

Aafrikat ei tarvitse praegusel kujul enam kauaks olla. Teadlased on avastanud otseseid keemilisi t\u00f5endeid, et musta mandri kesk- ja l\u00f5unaosa on jagunemas kaheks laamaks. Miljonite aastate p\u00e4rast v\u00f5ib kahe uue laama vahele tekkida uus meri.<\/p>\n

Rahvusvaheline teadlasr\u00fchm v\u00e4idab, et umbes 2500 kilomeetri pikkune laamal\u00f5he on hakanud tekkima Tansaaniast l\u00e4bi Sambia Namiibiani. Laamad on suured maakooret\u00fckid, mis aegam\u00f6\u00f6da ringi triivivad.<\/p>\n

Uuring, mida juhtis R\u016bta Karolyt\u0117 Inglismaalt Oxfordi \u00dclikoolist, keskendus Sambias asuva Kafue rifti kuumaveeallikatele.<\/p>\n

Teadlased anal\u00fc\u00fcsisid allikaist erituvaid gaase, mis on \u00fcles kerkinud s\u00fcgaval maakoore all asuvast poolvedelast vahev\u00f6\u00f6st.<\/p>\n

Heeliumi, s\u00fcsihappegaasi ja muude gaaside p\u00e4rinemisele just vahev\u00f6\u00f6st viitab nende isotoopiline koosseis ehk neutronite arv nende aatomite tuumades.<\/p>\n

<\/p>\n

Gaaside olemasolu viitab, et s\u00fcgaval maap\u00f5ues tegutsevad tugevad j\u00f5ud, mis venitavad maakoort seda joont pidi laiali. Maakoor h\u00f5reneb ja praguneb just nii nagu h\u00f5reneb ja praguneb ka leivak\u00e4\u00e4r, kui seda kahest \u00e4\u00e4rest kinni hoides laiali venitama hakata.<\/p>\n

M\u00f6\u00f6da neid tekkivaid pragusid need gaasid siis \u00fcles t\u00f5usevadki ja annavad maakoore aeglasest rebenema hakkamisest m\u00e4rku.<\/p>\n

Kui rebenemine veel miljoneid aastaid j\u00e4tkub, siis v\u00f5ibki laam jaguneda kaheks, nii et m\u00f5lema poole vahele v\u00f5ib tekkida isegi uus meri v\u00f5i ookean. Just samamood on tekkinud ju ka Atlandi ookean, kui Ameerika eraldus Euroopast ja Aafrikast.<\/p>\n

Karolyt\u0117 ja kaasautorid kirjutavad ajakirjas Frontiers in Earth Science<\/a>, et nende uuritud rift ehk tekkiv maakoorel\u00f5he on samalaadne juba ammu tuntud Ida-Aafrika riftis\u00fcsteemiga, mis ulatub Mosambiigist Djiboutini ja kust Aafrika on samuti aeglaselt l\u00f5hki k\u00e4risemas.<\/p>\n

Varajases arenguj\u00e4rgus rifte on tuvastada raske, sest tuvastusm\u00e4rgid on neil n\u00f5rgukesed ja vaevum\u00e4rgatavad, erinevalt juba k\u00fcpseist riftiv\u00f6\u00f6ndeist, mis annavad endast m\u00e4rku vulkaanipursete ja maav\u00e4rinatega.<\/p>\n

V\u00e4rskel teadust\u00f6\u00f6l on aga ka praktilist v\u00e4\u00e4rtust. Tekkiva maakoorel\u00f5he piirkonnas on soodsad tingimused geotermilise energia ammutamiseks.<\/p>\n

Pildil: siia tuleb ookean. Kafue j\u00f5gi voolab piki Kafue rifti.<\/p>\n

Teadusuudised on Vikerraadios eetris esmasp\u00e4evast reedeni ca kell 8.35 ja laup\u00e4eval ca kell 8.25.<\/p>\n","protected":false},"excerpt":{"rendered":"Aafrikat ei tarvitse praegusel kujul enam kauaks olla. Teadlased on avastanud otseseid keemilisi t\u00f5endeid, et musta mandri kesk-…\n","protected":false},"author":2,"featured_media":180685,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[80],"tags":[1114,26,27,37,33,35,34,36,31,32,21,80361,80360,28,29,95,48271,19,25,80362,37546,16911,23,24,22,20,30,92,93,94],"class_list":["post-180684","post","type-post","status-publish","format-standard","has-post-thumbnail","category-maailm","tag-aafrika","tag-breaking-news","tag-breakingnews","tag-ee","tag-eesti","tag-eesti-keel","tag-estonia","tag-estonian","tag-featured-news","tag-featurednews","tag-headlines","tag-laam","tag-laamtektoonika","tag-latest-news","tag-latestnews","tag-maailm","tag-namiibia","tag-news","tag-populaarseimad-lood","tag-rift","tag-sambia","tag-tansaania","tag-top-stories","tag-topstories","tag-uldised-uudised","tag-uudised","tag-viimased-uudised","tag-world","tag-world-news","tag-worldnews"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ee\/116594163480349711","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/180684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/comments?post=180684"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/180684\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media\/180685"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media?parent=180684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/categories?post=180684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/tags?post=180684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}