Video: Dab tsi yog andesitic magma tsim?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Andesite yog ib lub pob zeb zoo-grained uas tsim thaum lub magma tawg mus rau saum npoo thiab crystallized sai. Andesite thiab diorite muaj ib tug muaj pes tsawg leeg uas yog nruab nrab ntawm basalt thiab granite. Qhov no yog vim lawv niam lawv txiv magmas tsim los ntawm ib nrab melting ntawm basaltic oceanic phaj.
Dhau li ntawm no, dab tsi yog andesitic magma?
Andesitic magma feem ntau yog tsim los ntawm stratovolcanoes. Nws yog ib hom ntawm magma uas hardens sai sai thaum nws mus txog saum npoo.
Qhov thib ob, puas yog andesitic magma felsic? Andesite feem ntau yog tsim ntawm convergent phaj margins tab sis kuj tseem tuaj yeem tshwm sim hauv lwm qhov chaw tectonic. Nruab nrab volcanic pob zeb yog tsim los ntawm ntau yam txheej txheem: Fractional crystallization ntawm mafic niam txiv magma . Magma sib tov ntawm mob rhyolitic thiab mafic basaltic magmas hauv a magma lub pas dej.
Ib yam li ntawd ib tug yuav nug, yuav ua li cas andesitic magma yog tsim?
Andesitic magma yog tsim los ntawm ntub ib nrab melting ntawm lub mantle. Lub mantle nyob rau hauv dej hiav txwv muaj kev sib cuag nrog dej. Thaum subduction, los yog continental daim hlau rub tawm ntawm ib leeg, tshwm sim, lub mantle yuav sov thiab dej raug thawb rau hauv nws. Basaltic magma nrog cov ntsiab lus dej siab yog qhov tshwm sim.
andesite lava yog dab tsi?
Andesite yog ib qho extrusive pob zeb intermediate nyob rau hauv muaj pes tsawg leeg ntawm rhyolite thiab basalt. Andesite lava yog cov viscosity nruab nrab thiab cov ntaub ntawv tuab lava ntws thiab domes. Lo lus andesite yog muab los ntawm Andes Roob hauv South America, qhov twg andesite muaj ntau. Andesite yog volcanic sib npaug ntawm diorite.
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