Dab tsi txiav txim siab yooj yim npaum li cas magma ntws?
Dab tsi txiav txim siab yooj yim npaum li cas magma ntws?

Video: Dab tsi txiav txim siab yooj yim npaum li cas magma ntws?

Video: Dab tsi txiav txim siab yooj yim npaum li cas magma ntws?
Video: YWJ KOJ SIAB Official music video by: Dang Thao 2024, Hlis ntuj nqeg
Anonim

Ob qhov kub thiab ntxhia cov ntsiab lus ntawm magma cuam tshuam li cas yooj yim nws ntws . Lub viscosity (thickness) ntawm lub magma uas erupts los ntawm lub roob hluav taws muaj feem xyuam rau cov duab ntawm lub roob hluav taws. Volcanoes nrog txoj kab nqes hav zoo li tsim los ntawm cov nplaum heev magma , thaum flatter volcanoes tsim los ntawm magma uas ntws yooj yim.

Ntawm no, leej twg ntawm cov hauv qab no txiav txim siab yooj yim npaum li cas magma ntws?

viscosity txiav txim dab tsi magma yuav ua. Mafic magma tsis yog nkig thiab yuav ntws yooj yim mus rau saum npoo. Yog felsic magma nce mus rau hauv ib magma chamber, nws yuav viscous heev txav thiab yog li nws tau daig. Dissolved gases yuav daig los ntawm tuab magma thiab cov magma chamber pib tsim siab.

Ib sab saum toj no, cov ntsiab lus magma gas nyob li cas? Tsis tawg tawg yog nyiam los ntawm qis gas cov ntsiab lus thiab qis viscosity magmas (basaltic rau andesitic magmas ). Yog viscosity yog qis, uas tsis yog-tawg tawg feem ntau yog pib nrog cov qhov hluav taws kub vim kev tso tawm ntawm yaj cov pa . Thaum twg magma mus txog qhov chaw ntawm lub ntiaj teb, nws yog hu ua lava.

Ib yam li ntawd, koj tuaj yeem nug, dab tsi ua rau magma txav mus?

Magma cov ntaub ntawv los ntawm ib nrab melting ntawm mantle pob zeb. Raws li cov pob zeb txav upward (los yog muaj dej ntxiv rau lawv), lawv pib yaj me ntsis. Thaum kawg lub siab los ntawm cov npuas no muaj zog dua li cov pob zeb uas nyob ib puag ncig thiab cov pob zeb uas nyob ib puag ncig no, ua rau cov pob zeb tawg. magma mus rau saum npoo.

Dab tsi txiav txim siab qhov viscosity ntawm lava?

viscosity yog cov kua dej tsis kam ntws. Kub, muaj pes tsawg leeg, thiab volatile (gas) cov ntsiab lus loj txiav txim siab viscosity ntawm lava . Kub: Qhov kub tshaj qhov lava , qhov qis dua viscosity (lub thinner nws). Lub cooler lub lava , qhov siab dua viscosity (qhov thicker nws yog).

Pom zoo: