{"id":688810,"date":"2026-04-23T07:06:04","date_gmt":"2026-04-23T07:06:04","guid":{"rendered":"https:\/\/microscopemedia.com\/?p=688810"},"modified":"2026-04-23T07:06:04","modified_gmt":"2026-04-23T07:06:04","slug":"forte-ascunse-deformeaza-pamantul-spun-cercetatorii","status":"publish","type":"post","link":"https:\/\/microscopemedia.com\/?p=688810","title":{"rendered":"For\u021be ascunse deformeaz\u0103 P\u0103m\u00e2ntul, spun cercet\u0103torii"},"content":{"rendered":"
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Mult sub suprafa\u021ba P\u0103m\u00e2ntului, curen\u021bii de convec\u021bie cu mi\u0219care lent\u0103 se agit\u0103 \u00een interiorul mantalei. Ace\u0219ti curen\u021bi sunt str\u00e2ns lega\u021bi de mi\u0219carea pl\u0103cilor tectonice \u0219i nu se limiteaz\u0103 doar la deplasarea pl\u0103cilor de deasupra.<\/p>\n

Ei \u00eentind \u0219i deformeaz\u0103 chiar materialul mantalei, scrie ScienceDaily<\/a>.<\/p>\n

Un nou studiu arat\u0103 c\u0103 o mare parte din aceast\u0103 deformare din cea mai ad\u00e2nc\u0103 parte a mantalei are loc \u00een regiuni \u00een care oamenii de \u0219tiin\u021b\u0103 cred c\u0103 pl\u0103cile tectonice antice s-au scufundat de-a lungul a milioane de ani.<\/p>\n

Harta global\u0103 dezv\u0103luie deformarea \u00een apropierea nucleului<\/h2>\n

Cercet\u0103torii b\u0103nuiau de mult timp c\u0103 exist\u0103 o leg\u0103tur\u0103 \u00eentre deformarea mantalei profunde \u0219i aceste pl\u0103ci \u00eengropate, dar aceast\u0103 cercetare ofer\u0103 prima imagine global\u0103.<\/p>\n

Echipa a examinat aproape 75% din mantaua inferioar\u0103, un strat situat chiar deasupra limitei dintre nucleu \u0219i manta, la aproximativ 2.900 de kilometri sub suprafa\u021ba P\u0103m\u00e2ntului.<\/p>\n

Ei au adunat \u0219i analizat peste 16 milioane de seismograme de la 24 de centre de date din \u00eentreaga lume, cre\u00e2nd unul dintre cele mai cuprinz\u0103toare seturi de date seismice asamblate vreodat\u0103.<\/p>\n

Undele seismice dezv\u0103luie structura ascuns\u0103<\/h2>\n

C\u00e2nd au loc cutremure, acestea genereaz\u0103 unde de forfecare care se propag\u0103 prin interiorul P\u0103m\u00e2ntului.<\/p>\n

Aceste unde se deplaseaz\u0103 cu viteze diferite, \u00een func\u021bie de direc\u021bia lor \u0219i de propriet\u0103\u021bile materialului prin care trec.<\/p>\n

Aceast\u0103 varia\u021bie direc\u021bional\u0103, cunoscut\u0103 sub numele de anizotropie seismic\u0103, permite oamenilor de \u0219tiin\u021b\u0103 s\u0103 identifice zonele \u00een care manta a fost deformat\u0103.<\/p>\n

Prin studierea acestor modele, cercet\u0103torii pot ob\u021bine informa\u021bii valoroase despre modul \u00een care manta curge \u0219i circul\u0103 \u00een timp.<\/p>\n

Ce cauzeaz\u0103 deformarea \u00een pl\u0103ci<\/h2>\n

Oamenii de \u0219tiin\u021b\u0103 \u00eenc\u0103 lucreaz\u0103 pentru a \u00een\u021belege exact de ce aceste pl\u0103ci prezint\u0103 anizotropie seismic\u0103.<\/p>\n

O posibilitate este ca pl\u0103cile s\u0103 p\u0103streze o anumit\u0103 anizotropie \u201efosil\u0103\u201d din perioada \u00een care se aflau mai aproape de suprafa\u021b\u0103.<\/p>\n

Cu toate acestea, o explica\u021bie mai probabil\u0103 este c\u0103 deformarea intens\u0103 are loc pe m\u0103sur\u0103 ce pl\u0103cile se scufund\u0103 \u0219i interac\u021bioneaz\u0103 cu limita dintre miez \u0219i manta.<\/p>\n

Pe m\u0103sur\u0103 ce coboar\u0103, acestea \u00eemping \u0219i remodeleaz\u0103 materialul din jur. C\u0103ldura \u0219i presiunea extreme la aceste ad\u00e2ncimi pot altera mineralele din pl\u0103ci, cre\u00e2nd o nou\u0103 \u201estructur\u0103\u201d anizotrop\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mult sub suprafa\u021ba P\u0103m\u00e2ntului, curen\u021bii de convec\u021bie cu mi\u0219care lent\u0103 se agit\u0103 \u00een interiorul mantalei. Ace\u0219ti curen\u021bi sunt str\u00e2ns lega\u021bi de mi\u0219carea pl\u0103cilor tectonice \u0219i nu se limiteaz\u0103 doar la … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":688811,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"Default","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/688810"}],"collection":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=688810"}],"version-history":[{"count":0,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/688810\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/media\/688811"}],"wp:attachment":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=688810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=688810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=688810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}