Video: Dab tsi Magma muaj cov ntsiab lus silica siab tshaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
MAGMA COMPOSITION THIAB ROCK HOM
| SiO 2 TXOJ CAI | MAGMA HOM | VOLCANIC pob zeb |
|---|---|---|
| ~50% | Mafic | Basalt |
| ~60% | Nruab nrab | Andesite |
| ~65% | Felsic (zeeg) | Dacite |
| ~70% | Felsic (siab Si) | Rhyolite |
Tom qab ntawd, hom magma twg muaj cov silica ntau tshaj?
Rhyolitic magma muaj silica ntau tshaj.
Tsis tas li ntawd, hom magma twg muaj cov hlau ntau tshaj? Basaltic magma yog nyob rau hauv siab hlau , magnesium, thiab calcium tab sis tsawg hauv potassium thiab sodium. Nws nyob ntawm qhov kub thiab txias li ntawm 1000oC rau 1200oC (1832oua f2192oF). Andesitic muaj mag nruab nrab ntawm cov zaub mov no, nrog rau qhov kub thiab txias li ntawm 800oC rau 1000oC (1472oF rau 1832oF).
Tsuas yog li ntawd, cov lava yooj yim puas muaj cov ntsiab lus silica siab?
Lava : Magma uas ncav cuag lub ntiaj teb nto yog hu ua lava . Nws tuaj yeem yog acidic lossis yooj yim . Acid lava yog khov, yog lighter hauv xim thiab muaj silica ntau dua . Basic lava yog tsis khov, yog darker nyob rau hauv cov xim thiab muaj qis silica cov ntsiab lus.
Hom magma twg muaj cov ntsiab lus siab tshaj plaws?
Thib ob, felsic magmas nyiam muaj siab dua theem ntawm volatiles; uas yog , Cheebtsam uas coj li gases thaum lub sij hawm volcanic eruptions. Cov feem ntau ntau tsis hloov pauv hauv magm yog dej (H2O), feem ntau ua raws li carbon dioxide (CO2), thiab tom qab ntawd los ntawm sulfur dioxide (SO2).
Pom zoo:
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