Video: Dab tsi yog qhov txawv ntawm pob zeb intrusive thiab extrusive?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Extrusive igneous pob zeb daim ntawv thaum magma nce mus txog lub ntiaj teb nto ib lub roob hluav taws thiab txias sai sai. Feem ntau extrusive (volcanic) pob zeb muaj cov pob zeb me me. Intrusive , los yog plutonic, igneous pob zeb daim ntawv thaum magma txias maj mam hauv qab lub ntiaj teb nto. Feem ntau intrusive pob zeb muaj loj, zoo-tsim crystals.
Yog li ntawd, dab tsi yog qhov txawv ntawm cov pob zeb intrusive thiab extrusive?
Cov qhov sib txawv ntawm intrusive thiab extrusive igneous yog tias, intrusive pob zeb yog ib qho uas tsim thaum magma txias hauv ntiaj teb. Extrusive igneous pob zeb yog ib qho uas, cov ntaub ntawv thaum lava txias ntawm lub ntiaj teb nto.
Tsis tas li ntawd, puas yog mafic intrusive lossis extrusive? Mafic pob zeb muaj cov ntsiab lus silica tsawg (45-55%). Lawv feem ntau yog xim dub thiab muaj hlau thiab magnesium. Qee qhov piv txwv yog: Basalt ( extrusive ) thiab gabbro ( cuam tshuam ). Basalt yog lub pob zeb uas tsim tawm ntawm cov kab sib kis thiab ua rau hauv hiav txwv.
Ua kom pom qhov no, puas yog pob zeb intrusive lossis extrusive ntau ntom?
Magmas tsawg dua ntom tshaj ib puag ncig pob zeb , thiab yog li ntawd yuav txav mus rau pem hauv ntej. Yog tias magma ua rau saum npoo nws yuav tawg thiab tom qab ntawd crystallize los ua ib qho extrusive los yog volcanic pob zeb . Yog hais tias nws crystallizes ua ntej nws mus txog saum npoo nws yuav tsim ib qho igneous pob zeb ntawm qhov tob hu ua plutonic lossis cuam tshuam igneous pob zeb.
Puas yog Laccolith intrusive lossis extrusive?
A cov laccolith yog ib lub dome zoo li tus cuam tshuam lub cev uas tau intruded ntawm cov khaubncaws sab nraud povtseg ntawm sedimentary pob zeb. Qhov nce magma yuam cov khaubncaws sab nraud povtseg kom sawv mus rau hauv lub dome.
Pom zoo:
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Lub npe rau lub pob zeb nruab nrab ntawm cov pob zeb uas txias heev yog dab tsi?
Extrusive igneous pob zeb