Video: Hom pob zeb twg muaj cov ntsiab lus silica siab tshaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
felsic pob zeb, siab tshaj cov ntsiab lus ntawm silicon, nrog predominance ntawm quartz, alkali feldspar thiab / los yog feldspathoids: felsic minerals; cov pob zeb no (piv txwv li, granite, rhyolite ) feem ntau yog lub teeb xim, thiab muaj qhov ntom ntom.
Nyob rau hauv no txoj kev, hom twg ntawm igneous pob zeb yuav muaj cov silica tshaj?
Felsic igneous pob zeb
Tsis tas li ntawd, cov npe ntawm cov pob zeb uas tsis muaj zog yog nyob rau hauv kev txiav txim ntawm cov ntsiab lus silica? Nyob ntawm lawv silica cov ntsiab lus , lawv hu ua (hauv ascending xaj ntawm silica cov ntsiab lus ) gabbro, diorite, granite thiab pegmatite. Los ntawm qhov ntau, cov no yog cov nyob deb heev pob zeb hom.
Ua li no, lub pob zeb twg muaj cov ntsiab lus silica siab tshaj?
Muab tso ua ke ntawm ntau lub pob zeb tsom xam qhia tias rhyolite thiab granite yog felsic, nrog rau qhov nruab nrab silica cov ntsiab lus ntawm 72 feem pua; syenite, diorite , thiab monzonite yog nruab nrab, nrog qhov nruab nrab silica cov ntsiab lus ntawm 59 feem pua; gabbro thiab basalt yog mafic , nrog qhov nruab nrab silica cov ntsiab lus ntawm 48 feem pua; thiab peridotite yog
Dab tsi yog pob zeb igneous muaj cov ntsiab lus silica qis tshaj?
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 (intrusive). Basalt yog lub pob zeb uas yog tsim los ntawm kev sib kis ridges thiab ua rau hauv pem teb hiav txwv.
Pom zoo:
Lub hauv paus ntsiab lus twg ntawm kev txheeb ze koj tau siv los txiav txim siab seb pob zeb txheej H yog laus dua lossis hluas dua txheej?
Lub hauv paus ntsiab lus ntawm superposition yog yooj yim, intuitive, thiab yog lub hauv paus rau cov txheeb ze hnub nyoog sib tam. Nws hais tias cov pob zeb nyob hauv qab lwm cov pob zeb yog cov laus dua li cov pob zeb saum toj no
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MAGMA COMPOSITION THIAB ROCK HOM SiO2 COV NTAUB NTAWV MAGMA HOM VOLCANIC ROCK ~ 50% Mafic Basalt ~ 60% Intermediate Andesite ~ 65% Felsic (tsawg Si) Dacite ~ 70% Felsic (siab Si) Rhyolite
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