Puas yog basaltic magma khov?

Video: Puas yog basaltic magma khov?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Yog li, basaltic magmas zoo li dej haum (qis viscosity ), tab sis lawv viscosity tseem yog 10,000 txog 100,0000 npaug ntxiv khov dua dej. Rhyolitic magmas nyiam muaj ntau dua viscosity , xws li ntawm 1 lab thiab 100 lab lub sij hawm ntau dua khov dua dej.

Ntawm no, basaltic magma yog dab tsi?

Basaltic lava, los yog mafic lava, yog molten pob zeb enriched nyob rau hauv hlau thiab magnesium thiab depleted nyob rau hauv silica. Basaltic magmas yog tsim los ntawm tshaj qhov melting point ntawm lub mantle los ntawm kev ntxiv cua sov, hloov nws muaj pes tsawg leeg, los yog txo nws siab. Hauv qab dej, basaltic lavas tawg li hauv ncoo basalts.

Ib yam li ntawd, peb hom magma yog dab tsi? Muaj peb yooj yim hom magma : basaltic, andesitic, thiab mob rhyolitic , txhua tus uas muaj a txawv ntxhia muaj pes tsawg leeg. Tag nrho hom magma muaj ib feem tseem ceeb ntawm silicon dioxide. Basaltic magma muaj hlau, magnesium, thiab calcium, tiam sis tsis muaj poov tshuaj thiab sodium.

Tsis tas li ntawd, dab tsi volcanoes muaj basaltic magma?

Basaltic magma feem ntau yog tsim los ntawm ncaj qha melting ntawm lub ntiaj teb lub mantle, thaj av ntawm lub ntiaj teb hauv qab lub txheej crust. Nyob rau hauv lub continents, lub mantle pib ntawm qhov tob ntawm 30 mus rau 50 km. Shield volcanoes , xws li cov Islands tuaj ntawm Hawai'i, yog tsim los ntawm basalt yuav luag tag nrho.

Dab tsi yog magma viscosity tswj los ntawm?

Magmas uas muaj cov ntsiab lus silica siab yuav ua rau pom ntau dua qib ntawm polymerization, thiab muaj viscosities siab dua, dua li cov ntsiab lus uas tsis tshua muaj silica. Tus nqi ntawm yaj gases nyob rau hauv lub magma tuaj yeem cuam tshuam rau nws viscosity , tab sis nyob rau hauv ib txoj kev tsis meej tshaj qhov kub thiab txias cov ntsiab lus silica.

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