Geokemijske karakteristike Fe-skarnskog ležišta Damjan, Republika Makedonija

master's thesis

• Title (english): Geochemical characteristics of the Damjan iron skarn deposit, Republic of Macedonia
• Author: Marta Kiš
• Mentor: Sabina Strmić Palinkaš (mentor)
• Mentor: Ladislav Palinkaš (mentor)
• Committee member: Sabina Strmić Palinkaš (predsjednik povjerenstva)
• Committee member: Ladislav Palinkaš (član povjerenstva)
• Committee member: Mladen Juračić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2015-02-27, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES

Abstract

Rudno ležište Damjan smješteno je 20 km južno od grada Štipa, Republika
Makedonija. Pripada rudnom području Bučim-Damjan-Borov Dol smještenom u Lece-
Halkidika metalogenetskoj zoni, na granici Srpsko-makedonske mase i Vardarske zone. Geneza
rudnog ležišta vezana je uz prodore oligocenskih andezita u paleogensku flišnu sekvencu. Na
kontaktima andezitnih tijela s vapnenačkim članovima sekvence formirani su kalcijski
egzoskarnovi, a u hidrotermalnoj fazi odlagana je Fe-ruda. Formiranje skarnskih minerala i
odlaganje Fe-rude vršeno je u fazama karakterističnim za postanak skarnskih ležišta. Tijekom
izokemijskog metamorfizma rekristalizirane su vapnenačke sedimentne stijene. U progradnoj
fazi formirani su tipični skarnski minerali: hedenbergit, andradit i grossular. Retrogradnom
alteracijom progradni su minerali hidrotermalno izmijenjeni u smjesu klorita, epidota, karbonata
i kvarca. Tijekom ove faze odlagana i Fe-ruda u vidu magnetita i hematita. Iako se magnetit i
hematit u ukupnom sastavu ležištu javljaju u omjeru 1:1, magnetit dominira u dubljim
dijelovima ležišta te bliže kontaktima s andezitnim tijelima sugerirajući njegov nastanak na
višim temperaturama te nižem fugacitetu kisika. Hematit dominira u plićim dijelovima ležišta,
ukazujući na pad temperature i/ili porast fugaciteta kisika. U postrudnoj fazi formirane su manje
količine karbonata i kvarca.

Abstract (english)

The Damjan ore deposit is situated approximately 20 km south from the town of Štip,
Republic of Macedonia. It belongs to the Bučim-Damjan-Borov Dol ore district within the Lece-
Chalkidiki metallogenic zone. The mineralization occurs within the Vardar zone, near its contact
with the Serbo-Macedonian Massif. The genesis of the deposit, related to the penetration of the
Oligocene andesite in the Paleogene flysch sequence, comprises distinctive stages typical for
skarn deposits. The stage of the isochemical metamorphism resulted with the limestone
recrystallization. The Ca-exoskarn occurs at the contact of andesitic bodies and limestone
members of the flysch sequence. The principal prograde minerals include hedenbergite,
andradite and grossular. During the retrograde stage prograde skarn minerals were
hydrothermally altered into a mixture of chlorites, epidote, carbonates and quartz. The ore
mineralization represented by magnetite and hematite was deposited during the retrograde stage
as well. Although the bulk magnetite/hematite ratio is about 1:1, magnetite predominates in the
deeper part of the deposit and near contacts with andesite bodies, suggesting its formation at a
higher temperature and under a lower oxygen fugacity. In contrast, hematite prevails in the
shallow portion of the deposit, indicating its deposition at the lower temperature and/or under
the higher oxygen fugacity. The postore stage is characterized by the deposition of minor
amounts of carbonates and quartz.

• Keywords: andezit; Bučim-Damjan-Borov Dol rudno područje; fliš; hematit; magnetit; skarn
• Keywords (english): andesite; Bučim-Damjan-Borov Dol ore district; flysch; hematite; magnetite; skarn
• Language: croatian
• URN:NBN: urn:nbn:hr:217:054063
• Study programme: Title: Graduate university study of Geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra geologije (magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-03-22 08:53:32