Continental crust yog buoyant piv nrog nws cov dej hiav txwv counterpart thiab resists subduction rau hauv lub mantle. … Qhov no txhais tau hais tias loj-loj subduction ntawm continental crust thaum lub sij hawm kev sib tsoo, nrog ib tug loj sib npaug li 15% ntawm tag nrho cov dej hiav txwv crustal subduction flux txij li thaum 56 lab xyoo dhau los.
Vim li cas lub teb chaws ntug dej hiav txwv tsis Subduct?
Tshuaj (los yog lub cev), lub teb chaws sab av loj dhau buoyant rov qab mus rau lub mantle. … Vim yog nws qhov txheeb ze tsawg, continental crust tsuas yog tsis tshua muaj subducted los yog siv rov qab mus rau hauv lub mantle (piv txwv li, qhov chaw continental crustal blocks sib tsoo thiab thicken, ua rau tob melting).
Puas continental crust puas tau Subduct?
Txoj kev sib tsoo tsis muaj zog vim feem ntau ntawm cov av av av zoo li yuav raug rho tawm mus rau qhov tob ntawm ob peb puas km hauv cov cheeb tsam no. Vim tias qhov nruab nrab qhov tob ntawm seismicity feem ntau tsis tuaj thiab sab sauv sab saud yog offscraped ntawm qhov tob tob hauv thaj tsam sib tsoo, ob cheeb tsam no tsis zoo.
Puas yog dej hiav txwv lossis sab av loj subduct?
Oceanic crust is denser than continental crust. Ntawm thaj chaw subduction, cov dej hiav txwv dej hiav txwv feem ntau nkag mus rau hauv lub mantle hauv qab sib dua continental crust. (Qee lub sij hawm, dej hiav txwv crust yuav loj hlob dhau heev lawm thiab qhov ntom ntom uas nws ntog thiab spontaneously tsim ib cheeb tsam subduction, cov kws tshawb fawb xav.)
Can continents subducted?
Classic phaj tectonics tswv yim pom zoo uas teb chaws tsis subduct. Hloov chaw, thaum ob lub teb chaws sib tsoo ntawm ib thaj tsam sib koom ua ke tom qab noj dej hiav txwv los ntawm kev sib cais, lawv ua kom luv luv nyob rau hauv lithosphere, uas yog thickened mus txog ob npaug ntawm cov nqi ib txwm.
