Mineralogy, Chemical Compusitiun a nd Industrial use off eld spars from Ma shhad and in Comparison with oth erfe ldspar Depus its in Iran

Milshhad ~fani l c and l!,funodinrilcs arc inlfUlkd in th ree different period between Triass ic to Lue JU fllssic. Muscovi te- biotitl! gr:tn itc and pegmatill!s (the you nge ls) arc exposed be tween Khal adgc ,md Khaj c h Mourad area. Alkali fe ld spars within pegmatite d ykes. between G hcshlagh, iloll Khladgc, we re sludit!d in detai l inclucJing l}rC rese rve es ti mation. mineralogy. chemical composition. and industrial uses. Fddspar in the Gheshlagh area is K-rich type (K20>%9 and Na.p< %2). While in Kbajch Moufild lIrC<I. hoth types of K lind NlI -rich fe ldspa rs arc recognized, "chr('39')~ Ghcshlagh feldspar Lchr('39')i suitable for ceramic body and the N,Hich type I:rom Khajeh Mourad is applicable in glass and as filler in paint and rubber industries.