De morfologische kenmerken van graniet

Althoughgraniteisagoodmaterialforbuilding, overflowasthegraniteinsomeareasbutofradon, anaturally occurringradioactivegas. Radonwillmakepeoplesuffering fromlung kanker, Hong Kong 13% thedeadoflung cancerdeathsareradonconcentration.

Quartzandfeldspar-richcoarsegrainorgrainintrusiverocksarethemostcommonplutonic rocksintheEarthand #39; s korst, formedbymagmadeepin theEarthand #39; s crustcooled. Duetopavingstonesandbuildingstoneandgraniteminingwasanimportantindustry.Graniteveinsorrockbed,morerepresentativeisirregularrockscalevariesgreatly. Maincomponentsarefeldspar, plagioclaseandalkalifeldsparareusuallyveryrich, therelativeabundanceofthetwointoagraniteclassificationbased. InmostGranites, wheretheratioof thetwotypesoffeldsparareless than1/2.Fall intothiscategoryoftheUnited Staten, centraal, EasternandSouth-West, Zuid-WestEngland, theBalticshield, FranceWestandCentral, Spainmostofthegranite, andmanyotherareas. Plagioclasegreatlyexceedsanalkali-feldspargranite, intheUnited Statesinsomeareasin theWestcommon.ContentofalkalifeldsparthanplagioclasegraniteproducedinNewEngland,theUnited KingdomandNorwayOsloareainmanylocations, butisasmallerrock, developedaverywide rangeinNorthernNigeria.Rockquartz inhoud in minder dan 20% niet calledgranite, darkmineral (maficminerals), themaximum-inhoud is is over 20%(byvolume). GraniteislessthemainmineralsareMuscovite, biotiet, hoornblende, pyroxeneorrarefayalite. Kan beproducedinanytypeofbiotiteingranite, andusually, thoughsometimessmallamounts. Sodiumamphiboleandpyroxene (ironofsodiumsodiumamphibole, amphibole aegirien) aretypicalofalkalineGranites.Ifnoneinthetwotypesoffeldsparcontentmuchhigher thantheother, het is unlikelytobethemainmineralhornblende, pyroxeen, darkmineralisusuallyofbiotiteorMuscovite, orboth.