Dab tsi yog qhov txawv ntawm mantle thiab asthenosphere?
Dab tsi yog qhov txawv ntawm mantle thiab asthenosphere?

Video: Dab tsi yog qhov txawv ntawm mantle thiab asthenosphere?

Video: Dab tsi yog qhov txawv ntawm mantle thiab asthenosphere?
Video: Dab ntxwg nyoos yog leej twg ...zaj no zoo heev. 2024, Kaum ib hlis
Anonim

Lub lithosphere muaj mantle uas yog khoom, zoo li lub crust, whereas lub asthenosphere yog xwb mantle uas yog kub txaus,> 1280C, tso cai rau convection tam sim no tshwm sim. Cov mantle yog tag nrho txheej ntawm pob zeb nruab nrab lub crust thiab core, whereas lub asthenosphere yog ib txheej tsis muaj zog ntawm sab sauv mantle uas muaj peev xwm convect.

Ua kom pom qhov no, puas yog asthenosphere hauv lub mantle?

σθενής asthen?s 'tsis muaj zog' + "sphere") yog qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntu ntu mantle ntawm lub ntiaj teb. Nws nyob hauv qab lithosphere, ntawm qhov tob ntawm kwv yees li 80 thiab 200 km (50 thiab 120 mais) hauv qab ntawm qhov chaw.

Ib sab saum toj, dab tsi yog asthenosphere ua los ntawm? Cov asthenosphere tseem hu ua "tsawg tshaj tawm" thaj tsam ntawm lub mantle vim tias seismic nthwv dej qeeb qeeb thaum lawv hla nws. Cov cuab yeej no qhia peb tias lub asthenosphere yog muaj li ntawm ib feem molten pob zeb slushlike khoom uas muaj cov khoom uas muaj cov kua occupying qhov chaw nyob nruab nrab.

Ib tug kuj yuav nug, dab tsi yog peb qhov sib txawv ntawm sab sauv thiab qis mantle?

Cov lub tsho loj adjoins lub crust los tsim lub lithosphere, whereas lub qis mantle yeej tsis los nyob rau hauv kev sib cuag nrog lub crust. Siab yog ib qho zoo heev qhov sib txawv ntawm lub tsho sab sauv thiab sab qis . Cov viscosity ntawm lub Upper mantle yog ntau tshaj qhov viscosity ntawm tus qis mantle.

Lub xeev ntawm teeb meem ntawm lub mantle yog dab tsi?

khov kho

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