Dab tsi yog qhov txawv ntawm effusive thiab explosive eruption?
Dab tsi yog qhov txawv ntawm effusive thiab explosive eruption?

Video: Dab tsi yog qhov txawv ntawm effusive thiab explosive eruption?

Video: Dab tsi yog qhov txawv ntawm effusive thiab explosive eruption?
Video: Qhov Sib Txawv Ntawm Allergy, Flu & Coronavirus Yog Dab Tsi 2024, Tej zaum
Anonim

Effusive eruptions - magma nce los ntawm qhov chaw thiab ntws tawm ntawm lub roob hluav taws raws li cov kua nplaum hu ua lava. Kev tawg tawg - magma yog torn sib nrug thaum nws nce thiab nce mus txog saum npoo ntawm daim ntawv hu ua pyroclasts. Seb lub roob hluav taws yuav tawg explosively los yog effusively yog txiav txim los ntawm lub xub ntiag ntawm npuas.

Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog yam ntxwv ntawm kev tawg tawg?

Kev tawg tawg tshwm sim qhov twg txias dua, viscous magmas (xws li andesite) ncav cuag qhov chaw. Cov pa hluav taws xob tawg tsis tuaj yeem khiav tawm tau yooj yim, yog li lub siab tuaj yeem tsim kom txog thaum cov pa tawg tawg tawg pob zeb thiab lava tawg rau saum huab cua! Lava ntws yog ntau tuab thiab nplaum, yog li tsis txhob ntws downhill li yooj yim.

Ib sab saum toj no, hom magma ua rau tawg tawg? Kev tawg tawg ib txwm pib nrog qee hom kev thaiv nyob rau hauv lub qhov tsua ntawm lub roob hluav taws uas tiv thaiv kev tso tawm ntawm cov gases daig hauv cov dej khov heev thiab cov rhyolitic magma. Lub siab viscosity ntawm cov ntaub ntawv no ntawm magma tiv thaiv kev tso tawm ntawm cov pa gases.

Tsis tas li ntawd, qhov sib txawv ntawm cov hluav taws kub tawg thiab cov hluav taws tsis tawg yog dab tsi?

Volcanoes yog tsim thaum magma nce mus rau lub ntiaj teb saum npoo vim nws tsis tshua ntom dua li cov pob zeb nyob ib puag ncig. Volcanic kev tawg tuaj yeem ua tau tsis tawg los yog tawg nyob ntawm qhov viscosity ntawm magma. Tsis-explosive hom erruptions feem ntau tsim ntau hom lava, xws li a'a, pāhoehoe thiab hauv ncoo lavas.

Puas yog daim ntaub thaiv hluav taws kub effusive lossis tawg?

Kev tawg Nyob rau hauv cov ntaub thaiv npog volcanoes tsuas yog tawg yog tias dej qee yam nkag mus rau hauv lub qhov cua, txwv tsis pub lawv yog cov cim los ntawm qhov tawg qis uas tsim cov cinder cones thiab spatter cones ntawm qhov cua, txawm li cas los xij, 90% ntawm lub roob hluav taws yog lava ntau dua li cov khoom siv pyroclastic.

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