Cov pob zeb metamorphic nthuav tawm li cas?
Cov pob zeb metamorphic nthuav tawm li cas?

Video: Cov pob zeb metamorphic nthuav tawm li cas?

Video: Cov pob zeb metamorphic nthuav tawm li cas?
Video: tu txiv tsi pab nkauj tawm tshiab-Cover(niam vamkhwb&paj yeeb& xis xyooj&ntxawm xyooj&niam npawglem) 2024, Kaum ib hlis
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Metamorphic pob zeb yog tsim nyob rau hauv lub ntiaj teb lub crust. Hloov qhov kub thiab txias tej yam kev mob yuav ua rau muaj kev hloov rau cov ntxhia sib dhos ntawm lub protolith. Metamorphic pob zeb yog thaum kawg nthuav tawm nyob rau saum npoo los ntawm uplift thiab yaig ntawm lub overlying pob zeb.

Dhau li ntawm no, cov pob zeb metamorphic sib cuag li cas?

Hu rau Metamorphism. Metamorphic pob zeb uas daim ntawv nyob rau hauv tej yam kev mob uas tsis tshua muaj siab los yog cia li confining siab tsis ua foliated. Feem ntau, qhov no yog vim lawv tsis faus tob, thiab cov cua sov rau lub metamorphism los ntawm lub cev ntawm magma uas tau tsiv mus rau sab sauv ntawm lub crust.

Ib yam li ntawd, peb kawm tau dab tsi los ntawm cov pob zeb metamorphic? Geologists tuaj yeem kawm cov hauv qab no txog lub ntiaj teb los ntawm kev kawm txog cov pob zeb metamorphic:

  • qhov kub thiab txias tej yam kev mob (metamorphic ib puag ncig) nyob rau hauv lub pob zeb tsim.
  • qhov muaj pes tsawg leeg ntawm niam txiv, los yog thawj unmetamorphosed, pob zeb.

Ib yam li ntawd, tib neeg nug, metamorphism ua dab tsi rau pob zeb?

Hauv cheeb tsam metamorphism feem ntau ua foliated pob zeb xws li gneiss thiab schist. Dynamic Metamorphism kuj tshwm sim vim yog roob-tsev. Cov rog loj heev ntawm tshav kub thiab siab ua rau pob zeb yuav tsum tau khoov, folded, crushed, flattened, thiab sheared. Metamorphic pob zeb yog yuav luag ib txwm nyuaj tshaj sedimentary pob zeb.

Dab tsi yog lub npe hu ua metamorphic pob zeb?

A metamorphic pob zeb yog hom pob zeb uas tau hloov los ntawm huab cua kub thiab siab. Nws lub npe yog los ntawm 'morph' (lub ntsiab lus daim ntawv), thiab 'meta' (lub ntsiab lus hloov). Tus thawj pob zeb tau rhuab (kub siab tshaj 150 mus rau 200 ° C) thiab pressured (1500 bars). Marble yog ib metamorphic pob zeb tsim los ntawm limestone.

Pom zoo: