Video: Tus txheej txheem ntawm subduction yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Subduction yog geological txheej txheem uas tshwm sim nyob rau hauv convergent ciam teb ntawm tectonic daim hlau qhov twg ib phaj tsiv nyob rau hauv lwm tus thiab raug yuam kom tog vim muaj zog gravitational siab rau hauv lub mantle. Thaj chaw uas qhov no txheej txheem tshwm sim yog hu ua subduction thaj chaw.
Ntxiv mus, dab tsi ua rau subduction txheej txheem?
Subduction yog a txheej txheem nyob rau hauv geology qhov twg ib daim hlau tectonic swb rau hauv qab ib tug thiab sib koom ua ke rau hauv lub ntiaj teb lub mantle. Vim muaj cua sov ua rau los ntawm nws rubbing tawm tsam lwm lub phaj nrog rau lub ntuj sov ntawm lub mantle, lub phaj melts thiab tig mus rau hauv magma.
Ib tug kuj yuav nug, ua li cas subduction volcanoes tsim? A subduction volcano Cov ntaub ntawv thaum continental thiab dej hiav txwv crust sib tsoo. Lub oceanic crust melts thiab migrate upwards mus txog rau thaum nws erupts rau saum npoo, tsim ib tug roob hluav taws.
Ua raws li qhov kev pom no, qhov txheej txheem subduction sai npaum li cas?
Subduction yog txoj cai ntawm ib lub phaj tectonic txav mus rau hauv lwm lub phaj tectonic ntawm qhov taw tes ntawm lawv cov ciam teb. Subduction tshwm sim qeeb heev. Qhov tseeb, geologists tau txheeb xyuas qhov nruab nrab ntawm kev sib koom ua ke ntawm 2 thiab 8 centimeters hauv ib xyoos.
Ib qho piv txwv ntawm subduction yog dab tsi?
Lub phaj dej hiav txwv tuaj yeem nqis los hauv qab lwm daim ntawv dej hiav txwv - Nyiv, Indonesia, thiab Aleutian Islands yog piv txwv ntawm hom no subduction . Hloov pauv, daim phiaj dej hiav txwv tuaj yeem nqis los hauv qab lub phaj av - South America, Central America, thiab Cascade Volcanoes yog ib qho piv txwv ntawm hom no subduction.
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