Video: Puas yog mantle plumes kua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thermal los yog compositional kua dej - dynamical plumes tsim nyob rau hauv txoj kev ntawd tau nthuav tawm ua qauv rau lawv qhov loj dua postulated mantle plumes . Lub taub hau ntawm thermal plumes cov ntaub ntawv vim cov khoom kub txav upwardthrough ntawm lub conduit sai tshaj qhov plam nws tus kheej nce los ntawm nws ib puag ncig.
Ib yam li ntawd, tib neeg nug, dab tsi ua rau mantle plumes?
Mantle pluaj . A plua plav yog anupwelling ntawm txawv txav kub pob zeb nyob rau hauv lub ntiaj teb mantle . Raws li lub taub hau ntawm mantle plumes tuaj yeem yaj ib nrab thaum lawv ncav cuag qhov tob tob, lawv xav tias yog ua rau ofvolcanic chaw hu ua hotspots thiab tej zaum kuj muaj ua rau dej nyab basalts.
Qhov thib ob, qhov twg mantle plumes pom? A plua plav yog pom muaj nyob qhov twg kub rocknucleates ntawm lub hauv paus- mantle ciam teb thiab nce los ntawm lub ntiaj teb mantle ua ib tug diapir nyob rau hauv lub ntiaj teb daim tawv nqaij.
Nyob rau hauv tas li ntawd, yog vim li cas lub mantle melts?
Cov mantle yog convecting, nqa kub mantle los ntawm qhov tob mus rau saum npoo thiab raws li nws ua yog li, cov mantle cov khoom nyob twj ywm kub, kub dua li cov pob zeb nyob ib puag ncig. Yog li, nyob rau hauv nruab nrab ntawm dej hiav txwv ridges (thiab athotspots zoo li Hawaii), lub mantle yog upwelling, ua rau decompression yaj tshwm sim.
Dab tsi ua rau melting ntawm divergent ciam teb?
Divergent ciam teb tshwm sim qhov twg daim hlau txav sib nrug. Kub mantle pob zeb nce thiab ib nrab yaj tshwm sim. Tshiab crust yog tsim los ntawm magma thawb los ntawm themantle. High tshav kub thiab magma input ua lub ridgebouyant.
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