Nyob rau hauv qhov sib txawv ntawm qhov deformation nkig, ductile deformation mechanisms feem ntau yuav tshwm sim ntawm qis dua kev ntxhov siab thiab siab dua P-T cov xwm txheej uas cuam tshuam rau nruab nrab-rau-qis crust thiab sab sauv mantle ib puag ncig.
Qhov twg yog brittle vs ductile deformation tshwm sim?
Brittle deformation: Irreversible strain thaum pob zeb tawg hauv daim teb rau kev ntxhov siab. Txhua yam khoom uas tawg mus rau hauv daim ntawv qhia txog tus cwj pwm nkig. Ductile deformation: thaum cov pob zeb ntws los yog khoov rau hauv cov lus teb rau kev ntxhov siab (xws li av nplaum).
Dab tsi deformation tshwm sim nyob rau hauv sab sauv thiab qis crust?
Nyob rau hauv lub sab saum toj crust qhov twg brittle tsis ua hauj lwm yog hom tseem ceeb ntawm deformation, ib tug infinitely ntev ntsug creeping txhaum yog assumed nrog lub txhaum tawm tsam parallel rau lub y-axis. Cov crust qis yog deformed los ntawm cov yas ntws, thiab muaj cov txheej txheem ib nrab ntawm qhov nruab nrab ntawm sab sauv thiab sab qis.
Ntawm qhov tob npaum li cas yog qhov deformation tshwm sim?
Ntawm qhov tob ntawm kwv 15 km peb mus txog qhov chaw hu ua brittle-ductile transition zone. Hauv qab no lub pob zeb lub zog txo qis vim tias cov pob txha tawg raug kaw thiab qhov kub thiab txias siab dua, ua rau cov pob zeb coj tus cwj pwm zoo.
pob zeb deformation tshwm sim nyob qhov twg?
pob zeb ua deformed thaum lub ntiaj teb lub pob zeb yog compressed los yog stretched. Lub zog xav tau los ua qhov no ntau lab xyoo - deformation yog qeeb heevtxheej txheem!
