Video: Yuav ua li cas tshwm sim thaum continental crust ntsib continental crust?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg dej hiav txwv crust converge nrog continental crust , cov denser dej hiav txwv phaj plunges hauv qab lub teb chaws Europe phaj. Cov txheej txheem no, hu ua subduction, tshwm sim ntawm dej hiav txwv cov trench. Lub phaj subducting ua rau melting nyob rau hauv lub mantle saum lub phaj. Lub magma nce thiab erupts, tsim volcanoes.
Ib yam li ntawd, tib neeg nug, yuav ua li cas tshwm sim nyob rau hauv lub continental crust?
Continental crust . Cov continental crust yog txheej ntawm granite, sedimentary thiab metamorphic pob zeb uas tsim cov teb chaws thiab cov cheeb tsam ntawm cov dej ntiav ntiav nyob ze rau lawv cov ntug dej hiav txwv, hu ua teb chaws Europe txee. Nws yog tsawg dua ntom ntawm cov khoom siv Lub ntiaj teb mantle thiab yog li "floats" saum nws.
Ib tug kuj yuav nug, qhov twg yog qhov continental crust pom? Kwv yees li 40% ntawm Lub ntiaj teb thaj chaw saum npoo thiab li ntawm 70% ntawm qhov ntim ntawm lub Lub ntiaj teb crust yog continental crust . Feem ntau continental crust yog thaj av qhuav saum hiav txwv. Txawm li cas los xij, 94% ntawm Zealandia continental crust cheeb tsam yog submerged hauv qab dej hiav txwv Pacific, nrog New Zealand ua 93% ntawm cov dej saum toj no.
Tib neeg kuj nug, yog tsim los ntawm Convergent ciam teb ntawm continental thiab continental crust?
Ntawm convergent phaj ciam teb , dej hiav txwv crust feem ntau raug yuam mus rau hauv lub mantle qhov twg nws pib yaj. Magma nce mus rau hauv thiab los ntawm lwm lub phaj, solidifying rau hauv granite, lub pob zeb uas ua rau teb chaws . Yog li ntawd, ntawm convergent ciam teb , continental crust yog tsim thiab dej hiav txwv crust puas lawm.
Lub continental crust tsim li cas?
Raws li nrog dej hiav txwv crust , continental crust yog tsim los ntawm phaj tectonics. Ntawm convergent phaj ciam teb, qhov twg tectonic daim hlau sib tsoo rau hauv ib leeg, continental crust yog thrust nyob rau hauv tus txheej txheem ntawm orogeny, los yog roob-tsev.
Pom zoo:
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