{"id":234691,"date":"2025-03-09T22:22:00","date_gmt":"2025-03-09T20:22:00","guid":{"rendered":"https:\/\/life.karpat.in.ua\/?p=234691"},"modified":"2025-03-09T20:12:26","modified_gmt":"2025-03-09T18:12:26","slug":"osszezavarodott-a-magneses-mezo-afrika-melyen","status":"publish","type":"post","link":"https:\/\/life.karpat.in.ua\/?p=234691&lang=hu","title":{"rendered":"\u00d6sszezavarodott a m\u00e1gneses mez\u0151 Afrika m\u00e9ly\u00e9n"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>F\u00f6ld\u00fcnk als\u00f3 k\u00f6peny\u00e9ben k\u00e9t kontinensm\u00e9ret\u0171 \u00e1sv\u00e1nyi strukt\u00fara befoly\u00e1solhatja a bolyg\u00f3 bels\u0151 folyamatait, ami instabilit\u00e1st id\u00e9zhet el\u0151 a m\u00e1gneses t\u00e9rben. A Csendes-\u00f3ce\u00e1n \u00e9s Afrika alatt h\u00faz\u00f3d\u00f3 form\u00e1ci\u00f3k a szeizmikus adatok alapj\u00e1n hasonl\u00f3nak t\u0171nnek, val\u00f3j\u00e1ban azonban elt\u00e9r\u0151 \u00f6sszet\u00e9tel\u0171ek. A leg\u00fajabb vizsg\u00e1latok szerint ez a k\u00fcl\u00f6nbs\u00e9g hat\u00e1ssal lehet a f\u00f6ldi h\u0151\u00e1raml\u00e1sra, \u00e9s ezen kereszt\u00fcl a m\u00e1gneses mez\u0151 m\u0171k\u00f6d\u00e9s\u00e9re is.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A k\u00e9t hatalmas, \u00fan. \u201ealacsony sebess\u00e9g\u0171 tartom\u00e1nyt\u201d (angol r\u00f6vid\u00edt\u00e9ssel LLSVP-t) m\u00e1r az 1980-as \u00e9vekben azonos\u00edtott\u00e1k. Az als\u00f3 k\u00f6penyb\u0151l a k\u00fcls\u0151 mag fel\u00e9 ny\u00falnak, egyik\u00fck a Csendes-\u00f3ce\u00e1n alatt, a m\u00e1sik Afrika t\u00e9rs\u00e9g\u00e9ben helyezkedik el. A mintegy 3000 kilom\u00e9ter m\u00e9lyen fekv\u0151 k\u00e9pz\u0151dm\u00e9nyek becsl\u00e9sek szerint ak\u00e1r 900 kilom\u00e9ter magasak \u00e9s t\u00f6bb ezer kilom\u00e9ter sz\u00e9lesek is lehetnek.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"665\" src=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/51c1410bf0454da3acd1f2c51de2df1a.jpg\" alt=\"\" class=\"wp-image-234692\" srcset=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/51c1410bf0454da3acd1f2c51de2df1a.jpg 1024w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/51c1410bf0454da3acd1f2c51de2df1a-300x195.jpg 300w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/51c1410bf0454da3acd1f2c51de2df1a-768x499.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Kor\u00e1bbi elemz\u00e9sek alapj\u00e1n \u00fagy v\u00e9lt\u00e9k, hogy \u00f6sszet\u00e9tel\u00fck azonos, \u00e1m az \u00fajabb kutat\u00e1sok ezt megc\u00e1folj\u00e1k.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">K\u00fcl\u00f6nb\u00f6z\u0151 eredet, elt\u00e9r\u0151 hat\u00e1sok<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">James Panton, a Cardiffi Egyetem geodinamikai kutat\u00f3ja \u00e9s munkat\u00e1rsai friss eredm\u00e9nyei szerint a k\u00e9t LLSVP nemcsak k\u00fcl\u00f6nb\u00f6z\u0151 anyagokb\u00f3l \u00e9p\u00fcl fel, hanem elt\u00e9r\u0151 t\u00f6rt\u00e9nettel is rendelkezik. Ez az \u00faj felismer\u00e9s \u00e1t\u00edrhatja a kor\u00e1bbi elm\u00e9leteket, mivel arra utal, hogy e k\u00e9pz\u0151dm\u00e9nyek nem egy \u0151si, egys\u00e9ges k\u00f6penyanyagb\u00f3l sz\u00e1rmaznak, hanem r\u00e9szben az egykori \u00f3ce\u00e1ni k\u00e9reg \u00fajrahasznosult darabjaib\u00f3l alakultak ki.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A kutat\u00f3k \u00fagy v\u00e9lik, hogy ezek a k\u00fcl\u00f6nbs\u00e9gek kihatnak a bels\u0151 h\u0151\u00e1raml\u00e1sra, amely kulcsszerepet j\u00e1tszik a F\u00f6ld m\u00e1gneses mezej\u00e9nek fenntart\u00e1s\u00e1ban.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mivel az elt\u00e9r\u0151 \u00f6sszet\u00e9tel\u0171 strukt\u00far\u00e1k m\u00e1s-m\u00e1s m\u00f3don vezetik vagy tartj\u00e1k vissza a h\u0151t, aszimmetrikus hat\u00e1st gyakorolhatnak a m\u00e1gneses t\u00e9rre is.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mi\u00e9rt k\u00fcl\u00f6nb\u00f6zik egym\u00e1st\u00f3l a k\u00e9t k\u00e9pz\u0151dm\u00e9ny?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kor\u00e1bbi kutat\u00e1sok kimutatt\u00e1k, hogy az LLSVP-k egy r\u00e9sze az egykori \u00f3ce\u00e1ni k\u00e9reg \u00fajrahasznosult t\u00f6mbjeib\u0151l \u00e1llhat. A lemeztektonikai folyamatok sor\u00e1n az al\u00e1buk\u00f3 (szubduk\u00e1l\u00f3) \u00f3ce\u00e1ni lemezek a F\u00f6ld m\u00e9ly\u00e9be ker\u00fclnek, ahol fokozatosan sz\u00e9tsz\u00f3r\u00f3dnak a k\u00f6penyben. Panton \u00e9s koll\u00e9g\u00e1i sz\u00e1m\u00edt\u00e1sai szerint a Csendes-\u00f3ce\u00e1n alatti tartom\u00e1nyban mintegy 50%-kal t\u00f6bb friss \u00f3ce\u00e1ni k\u00e9reg keveredik a k\u00f6penyanyaghoz, mint az Afrika alatt elhelyezked\u0151ben. A Csendes-\u00f3ce\u00e1ni T\u0171zgy\u0171r\u0171n\u00e9l zajl\u00f3 akt\u00edv szubdukci\u00f3 folyamatosan \u00fajabb \u00f3ce\u00e1ni k\u00e9regdarabokat juttat a m\u00e9lybe.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ezzel szemben Afrika alatt geol\u00f3giailag kev\u00e9sb\u00e9 akt\u00edv ter\u00fcletek tal\u00e1lhat\u00f3k, \u00edgy az ottani LLSVP id\u0151sebb, \u00e9s nagyobb ar\u00e1nyban tartalmaz r\u00e9gebbi k\u00e9reganyagot. Ez a tartom\u00e1ny emiatt kisebb s\u0171r\u0171s\u00e9g\u0171.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9rdekes m\u00f3don a szeizmikus hull\u00e1mok vizsg\u00e1lata alapj\u00e1n mindk\u00e9t strukt\u00fara nagyon hasonl\u00f3nak t\u0171nik, ami kor\u00e1bban ahhoz a t\u00e9ves k\u00f6vetkeztet\u00e9shez vezetett, hogy azonos h\u0151m\u00e9rs\u00e9klet\u0171ek \u00e9s \u00f6sszet\u00e9tel\u0171ek.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/7ce96c0288804133a20aa6a3c8aa8a53.jpg\" alt=\"\" class=\"wp-image-234693\" srcset=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/7ce96c0288804133a20aa6a3c8aa8a53.jpg 1024w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/7ce96c0288804133a20aa6a3c8aa8a53-300x200.jpg 300w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2025\/03\/7ce96c0288804133a20aa6a3c8aa8a53-768x512.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">A m\u00e1gneses t\u00e9r aszimmetri\u00e1ja<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A F\u00f6ld m\u00e1gneses mezeje a bolyg\u00f3 k\u00fcls\u0151 magj\u00e1nak mozg\u00e1saib\u00f3l ered, amelyeket jelent\u0151sen befoly\u00e1sol a h\u0151\u00e1raml\u00e1s. Ha a k\u00e9t LLSVP elt\u00e9r\u0151 m\u00e9rt\u00e9kben engedi ki\u00e1ramlani vagy tartja vissza a h\u0151t, az komoly hat\u00e1st gyakorolhat a m\u00e1gneses t\u00e9r stabilit\u00e1s\u00e1ra. A kutat\u00f3k felt\u00e9telezik, hogy a Csendes-\u00f3ce\u00e1n \u00e9s Afrika alatti form\u00e1ci\u00f3k aszimmetrikus m\u00f3don befoly\u00e1solhatj\u00e1k a f\u00f6ldi magnetoszf\u00e9r\u00e1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f6bb m\u00e9r\u00e9s arra utal, hogy Afrika t\u00e9rs\u00e9g\u00e9ben a m\u00e1gneses t\u00e9r bizonyos r\u00e9szei gyeng\u00fclnek, \u00edgy elk\u00e9pzelhet\u0151, hogy e m\u00e9lyben rejl\u0151 strukt\u00far\u00e1k is szerepet j\u00e1tszanak ebben a folyamatban.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Panton \u00e9s koll\u00e9g\u00e1i szerint tov\u00e1bbi vizsg\u00e1latokra lenne sz\u00fcks\u00e9g, p\u00e9ld\u00e1ul a F\u00f6ld gravit\u00e1ci\u00f3s ter\u00e9nek r\u00e9szletes felt\u00e9rk\u00e9pez\u00e9s\u00e9re, hogy pontosabban meg\u00e9rts\u00fck e m\u00e9lys\u00e9gi aszimmetria k\u00f6vetkezm\u00e9nyeit.<\/p>\n\n\n\n<p class=\"has-text-align-right wp-block-paragraph\"><strong><a href=\"http:\/\/Valami%20t\u00f6rt\u00e9nik%20Afrika%20m\u00e9ly\u00e9n:%20a%20m\u00e1gneses%20mez\u0151%20\u00f6sszezavarodott\" target=\"_blank\" rel=\"noreferrer noopener\">(origo.hu)<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>F\u00f6ld\u00fcnk als\u00f3 k\u00f6peny\u00e9ben k\u00e9t kontinensm\u00e9ret\u0171 \u00e1sv\u00e1nyi strukt\u00fara befoly\u00e1solhatja a bolyg\u00f3 bels\u0151 folyamatait, ami instabilit\u00e1st id\u00e9zhet el\u0151 a m\u00e1gneses t\u00e9rben. A Csendes-\u00f3ce\u00e1n \u00e9s Afrika alatt h\u00faz\u00f3d\u00f3 form\u00e1ci\u00f3k a szeizmikus adatok alapj\u00e1n hasonl\u00f3nak t\u0171nnek, val\u00f3j\u00e1ban azonban elt\u00e9r\u0151 \u00f6sszet\u00e9tel\u0171ek.<\/p>\n","protected":false},"author":12,"featured_media":234692,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41,596,49,39],"tags":[7647,2746,1760740,1760739],"class_list":["post-234691","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cikkek","category-erdekes","category-hirek","category-vilag","tag-afrika","tag-fold","tag-magma","tag-magneses-ter"],"_links":{"self":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/234691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=234691"}],"version-history":[{"count":1,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/234691\/revisions"}],"predecessor-version":[{"id":234694,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/234691\/revisions\/234694"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/media\/234692"}],"wp:attachment":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=234691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=234691"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=234691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}