Hidrotermalne alteracije rudnog tijela Vršnik u bakarnom porfirnom ležištu Bučim, Republika Sjeverna Makedonija

master's thesis

• Title (english): Hydrothermal alterations of Vrshnik ore body in copper porphyry deposit Buchim, Republic of North Macedonia
• Author: Ivor Perković
• Mentor: Andrea Čobić (mentor)
• Committee member: Andrea Čobić (predsjednik povjerenstva)
• Committee member: Darko Tibljaš (član povjerenstva)
• Committee member: Damir Bucković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2020-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Bakarno porfirno ležište Bučim je smješteno u kontaktnoj zoni Srpsko-Makedonske mase i Vardarske zone, oko 80 km JI od Skoplja, glavnog grada Republike Sjeverne Makedonije. U regionalnim razmjerima, nalazi se unutar centralnog dijela Leće-Halkidiki metalogenetske zone. Geneza ležišta je vezana uz nastanak nekoliko latitnih i latitno-andezitnih dajkova te njihovu intruziju u gnajseve, amfibolite i serpentinite Srpsko-Makedonske mase. Bakarno orudnjenje se pojavljuje u vidu diseminacija i štokverka, gdje su kao rudni minerali prisutni halkopirit, bornit, kubanit u asocijaciji s piritom i magnetitom.
Hidrotermalna alteracija je povezana uz orudnjenje, te je istražena na području rudnog tijela Vršnik, jednog od četiri rudna tijela prisutna u ležištu Bučim. Uzorci su analizirani metodama mikroskopije u prolaznoj svjetlosti, difrakcije rendgenskih zraka na prahu (XRPD), pretražnom (skenirajućom) mikroskopijom (SEM) i IR spektroskopijom.
Određene su četiri alteracijske zone: kalijska, filična, argilitna i kloritna. Izostanak propilitne, te prisutnost kloritne alteracijske zone ukazuje na plitak položaj rudnog tijela Vršnik u porfirnom sustavu.

Abstract (english)

Buchim Cu-porphyry deposit is an active copper mine, situated in the contact zone of Serbo-Macedonian Masiff and Vardar zone, approximately 80km SE from Skopje, capital of the Republic of North Macedonia. On the regional scale, it is located in the central part of Lece-Chalkidiki metallogenic zone. The genesis of the deposit is related to the formation of several dykes of latitic and latitic-andesitic compositon and their subsequent intrusion in basement rocks of the Serbo-Macedonian masiff. Copper mineralization is deposited as disseminations and stockwerk veins, with ore minerals being chlacopyrite, bornite, cubanite in association with pyrite and magnetite.
Hydrothermal alteration is associated with ore mineralization, and was analysed in the area of Vršnik ore body, one of four ore bodies found in Bučim Cu-porphyry deposit. Samples were analysed by petrographic microscopy, X-ray powder diffraction (XRPD), scanning electron microscopy (SEM) and IR spectroscopy.
Four alteration zones were determined: potassic, phyllic, argillic and chloritic. The absence of propylitic alteration zone, and presence of chloritic alteration zone instead, indicates to shallower placement of the Vrshnik ore body in the porphyry system.

• Keywords: bakarno porfirno ležište Bučim; porfirna ležišta; hidrotermalne alteracije
• Keywords (english): Buchim Cu porphyry deposit; Porphyry deposits; Hydrothermal alterations
• Language: croatian
• URN:NBN: urn:nbn:hr:217:735116
• 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: 2021-02-03 11:15:19