Mineralogical and petrographical analysis of granitoid rocks and pegmatite from Cer Mt, Sava-Vardar zone. : bachelor's thesis

Svrha rada je mineraloško-petrografska analiza granitodnih stijena i pegmatita s područja planine Cer. Cer je lakolitna granitoidna intruzija oligocenske starosti. Dio je Sava-Vardar zone i nalazi se na sjeverozapadu Republike Srbije. Pegmatiti i granitoidi s područja planine Cer analizirani su na makroskopskoj i mikroskopskoj razini. Klasificirani su prema postanku i udjelu tinjaca. Tako su granitoidi podijeljeni na dvotinjčaste biotitne granitoide i dvotinjčaste muskovitne granitoide. Pegmatiti su jednostavnijeg mineralnog sastava te sadrže beril. Prema mineralnom sastavu određen je kristalizacijski slijed uzoraka i mogućnost korisne mineralizacije. Kristalizacijski slijed započinje cirkonima i slijede amfiboli, biotit, plagioklas, muskovit, ortoklas, kvarc te na kraju beril. Pegmatiti su određeni kao mlađi od granitoida. Nakon kristalizacije uzorci su bili izloženi opacitizaciji, hidrotermalnim alteracijama, kloritizaciji i sericitizaciji te supergenoj limonitizaciji i kristalizaciji minerala glina. Makroskopska analiza pokazala je prisutnost berila u pegmatitima, a mikroskopska analiza pokazala je detaljniji mineralni sastav.The purpose of this paper is mineralogical and petrographical analysis of granitoid rocks and pegmatite from Cer Mt, Sava-Vardar zone. Cer Mt is a laccolith intrusion Oligocene in age. It's part of the Sava-Vardar zone and it's situated in the north-westrn part of Republic Serbia. Pegmatites and granitoids from Cer Mt were analysed macroscopically and microscopically. They are classified based on their genesis and mica ratio. Granitoid is divided into two-mica biotite granitoid and two-mica muscovite granitoid. Pegmatite has simpler mineralogical composition and contains beryl. The crystallization sequence of samples has been determined. The crystallization sequence begins with zircon which is followed by amphibole, biotite, plagioclase, muscovite, orthoclase, quartz and finally beryl. Pegmatite is determined as younger than granitoid. After the crystallization samples were exposed to opacitisation, hydrotermal alterations; chloritisation and sericitisation and supergene alterations; limonitisation and formation of clay minerals. Macroscopical analysis showed beril in pegmatite and microscopical analysis showed detail mineralogical composition