Bas alts yog cov pob zeb aphanitic igneous extrusive (volcanic) pob zeb. Bas alts yog tsim los ntawm feeb nplej ntawm plagioclase feldspar (feem ntau labradorite), pyroxene, olivine, biotite, hornblende thiab <20% quartz.
Puas yog Bas alt yog pob zeb lossis pob zeb?
Bas alt yog cov xim tsaus, zoo-grained, igneous pob zebtsim los ntawm plagioclase thiab pyroxene minerals. Nws feem ntau tsim los ua pob zeb extrusive, xws li lava ntws, tab sis kuj tuaj yeem tsim nyob rau hauv me me intrusive lub cev, xws li ib tug igneous dike los yog ib tug nyias sill. Nws muaj ib tug muaj pes tsawg leeg zoo ib yam li gabbro.
Puas yog Bas alt ua los ntawm lava?
Bas alt yog feem ntau muaj cov pob zeb lavauas txias los ntawm magma, kua pob zeb uas nce los ntawm lub ntiaj teb tob ntawm volcanoes.
Dab tsi yog cov ntxhia hauv Bas alt?
Bas alt yog tsim los ntawm ob yam minerals: Plagioclase feldspar thiab pyroxene.
Cov bas alt muaj dab tsi?
Cov zaub mov hauv bas alt suav nrog olivine, pyroxene, thiab plagioclaseBas alt tau tawg ntawm qhov kub ntawm 1100 txog 1250 ° C. Volcanic pob zeb (los yog lava) uas muaj xim tsaus nti. (grey mus rau dub), muaj 45 mus rau 53 feem pua silica, thiab yog nplua nuj nyob rau hauv hlau thiab magnesium.
