Ib pob zeb extrusive igneous yog cais raws li rhyolite thaum quartz ua 20% mus rau 60% los ntawm ntim ntawm nws tag nrho cov ntsiab lus ntawm quartz, alkali feldspar, thiab plagioclase (QAPF) thiab alkali. feldspar ua 35% mus rau 90% ntawm tag nrho nws cov ntsiab lus feldspar. … Cov feldspar minerals tej zaum kuj muaj raws li phenocrysts.
Yuav ua li cas cov pob zeb tsis pom kev yog rhyolite?
Rhyolite, extrusive igneous pob zebuas yog volcanic sib npaug ntawm granite. Feem ntau cov rhyolites yog porphyritic, qhia tias crystallization pib ua ntej extrusion.
Koj yuav faib cov pob zeb rhyolite li cas?
Kev faib tawm ntawm Rhyolite
A pab pawg ntawm cov pob zeb extrusive igneous, feem ntau porphyritic thiab feem ntau nthuav tawm kev ntxhib los mos, nrog phenocrysts ntawm quartz thiab alkali feldspar hauv iav rau cryptocrystalline av loj; kuj, tej pob zeb hauv pawg ntawd; qhov sib npaug extrusive ntawm granite.
Yuav ua li cas cov pob zeb igneous yog rhyolite thiab nws cov yam ntxwv?
Rhyolite yog ib qho extrusive igneous pob zeb nrog cov ntsiab lus silica siab heev. Nws feem ntau yog xim liab lossis grey nrog cov nplej me me uas lawv nyuaj rau saib yam tsis muaj tes lo ntsiab muag. Rhyolite yog tsim los ntawm quartz, plagioclase, thiab sanidine, nrog me me ntawm hornblende thiab biotite.
pob zeb tsis muaj zog yog dab tsi?
Igneous pob zeb tej zaum yuav yooj yim cais raws li lawv cov tshuaj/mineralmuaj pes tsawg leeg li felsic, nruab nrab, mafic, thiab ultramafic, thiab los ntawm kev ntxhib los mos los yog nplej loj: cov pob zeb intrusive yog cov nplej zom (tag nrho cov muaju pom ntawm qhov muag liab qab) thaum cov pob zeb extrusive yuav zoo- grained (microscopic crystals) los yog iav (…
