Video: Ib qho piv txwv ntawm asthenosphere yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Asthenosphere . Txhais: Cov txheej mos ntawm lub mantle hauv qab lithosphere. Piv txwv : Khawv koob.
Hais txog qhov no, lub asthenosphere yog dab tsi?
Pob zeb hauv asthenosphere yog "yas", txhais tau hais tias lawv tuaj yeem ntws los teb rau deformation. Txawm hais tias nws tuaj yeem ntws, lub asthenosphere yog tseem ua los ntawm khoom (tsis yog kua) pob zeb; koj tuaj yeem xav txog nws zoo li Silly Putty.
Tsis tas li ntawd, koj siv asthenosphere hauv kab lus li cas? asthenosphere hauv kab lus
- Nws tau pom tias lub asthenosphere tau nkag mus rau lub lithosphere overlying.
- Ib yam li ntawd, lub ntiaj teb lithosphere "floats" nyob rau hauv asthenosphere.
- Ntawm qhov tob, craton cov hauv paus hniav txuas mus rau hauv asthenosphere.
- Qhov chaw sab laug los ntawm kev tawm ntawm lithosphere yog sau los ntawm upwelling asthenosphere.
Qhov thib ob, lub ntiaj teb lub asthenosphere txhais li cas?
Kev tshawb fawb txhais rau asthenosphere Lub Upper ib feem ntawm lub Lub ntiaj teb mantle, ncua los ntawm qhov tob ntawm 75 km (46.5 mi) mus txog 200 km (124 mi). Cov asthenosphere nyob hauv qab lithosphere thiab muaj ib feem ntawm cov pob zeb molten. Seismic nthwv dej dhau los ntawm txheej txheej no tau qeeb qeeb.
Dab tsi yog cov tshuaj muaj nyob hauv asthenosphere?
Nws yog ib thaj tsam ntawm cov tshuaj lom neeg nrog cov khoom siv mantle feem ntau muaj cov minerals olivine thiab pyroxene, ua ntau nplua nuj nyob hauv cov ntsiab lus hnyav, xws li magnesium thiab hlau . Cov ntsiab lus lithosphere thiab asthenosphere hais txog rheological zog ntawm cov khoom.
Pom zoo:
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