Lub npe rau lub pob zeb nruab nrab ntawm cov pob zeb uas txias heev yog dab tsi?
Lub npe rau lub pob zeb nruab nrab ntawm cov pob zeb uas txias heev yog dab tsi?

Video: Lub npe rau lub pob zeb nruab nrab ntawm cov pob zeb uas txias heev yog dab tsi?

Video: Lub npe rau lub pob zeb nruab nrab ntawm cov pob zeb uas txias heev yog dab tsi?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
Anonim

Extrusive igneous pob zeb

Ntxiv mus, dab tsi yog qhov nruab nrab igneous pob zeb?

Nruab nrab pob zeb yog roughly txawm mixs ntawm felsic minerals (tsuas yog plagioclase) thiab mafic minerals (tsuas yog hornblende, pyroxene, thiab/los yog biotite). Muaj me me lossis tsis muaj quartz. Felsic pob zeb feem ntau yog feldspar (tshwj xeeb tshaj yog K-feldspar), tsawg kawg yog 10% quartz, thiab tsawg dua 15% mafic minerals (biotite, hornblende).

Ib yam li ntawd, dab tsi yog lwm lub npe rau igneous pob zeb? Igneous pob zeb kuj paub los ntawm npe plutonic thiab volcanic pob zeb . Plutonic pob zeb yog lwm lub npe rau intrusive igneous pob zeb.

Ua raws li qhov no, dab tsi yog 2 hom pob zeb igneous?

Igneous pob zeb yog tsim los ntawm lava los yog magma. Magma yog molten pob zeb uas yog underground thiab lava yog molten pob zeb uas erupts tawm ntawm qhov chaw. Cov ob lub ntsiab hom pob zeb igneous yog plutonic pob zeb thiab pob zeb volcanic . Plutonic pob zeb yog tsim thaum magma txias thiab solidifies underground.

Koj tuaj yeem qhia dab tsi txog lub pob zeb uas tsis muaj zog uas yog ntxhib grained?

Nplej qhov loj ua tau sib txawv heev, los ntawm heev coarse grained pob zeb nrog crystals qhov luaj li cas ntawm koj lub nrig, nqes mus rau cov khoom siv iav uas txias sai sai uas tsis muaj cov ntxhia nplej tag nrho. Coarse nplej ntau yam (nrog cov ntxhia nplej loj txaus kom pom yam tsis muaj iav magnifying) hu ua phaneritic.

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