Lub ntsiab lus ntawm Quartzite

Cov tshuaj tseem ceeb ntawm quartzite yog quartz-SiO₂. Quartzite feem ntau muaj cov qauv loj, ib qho kev ntxhib los mos metamorphic, thiab zoo li crystalline aggregate. Quartz kuj tuaj nyob rau hauv ntau yam xim, nrog rau cov xim xws li ntsuab, grey, daj, xim av, txiv kab ntxwv -liab, dawb, xiav, ntshav, thiab liab.

Lub protolith ntawm quartzite tuaj yeem yog: monomineralic quartz sandstone, argillaceous thiab calcareous quartz sandstone, colloidally deposited siliceous pob zeb (xws li siliceous pob zeb tsim los ntawm kev sib cais thiab redeposition ntawm terrigenous clasts thiab siliceous pob zeb txuam nrog 0 volcanic } sib sib zog nqus, lwm.

Quartzite tsim los ntawm cov protoliths sib txawv tuaj yeem paub qhov txawv raws li lawv cov qauv, qib ntawm metamorphism, cov khoom siv ntxiv, cov koom haum pob zeb, thiab qhov tshwm sim. Piv txwv li, quartzite tsim los ntawm monomineralic quartz sandstone muaj ib coarser grain loj, feem ntau nthuav tawm ib tug raug equilibrium mosaic qauv, thiab muaj ntau accessory minerals xws li zircon. Quartzite tsim los ntawm cov pob zeb siliceous, txawm tias nyob rau hauv siab - qib metamorphism, tsis tshua muaj cov ntxhia pob zeb loj dua 0.2 millimeters, thiab nthuav tawm cov qauv serrated intergrowth, feem ntau tsis muaj cov khoom siv ntxiv.