Mikrostrukturne i geokemijske karakteristike granitoidnih varijeteta duž potoka Srednja Rijeka (Moslavačka gora)

master's thesis

• Title (english): Microstructural and geochemical characteristics of granitoid varieties along Srednja Rijeka creek (Moslavačka gora)
• Author: Lucian Mureta
• Mentor: Zorica Petrinec (mentor)
• Committee member: Zorica Petrinec (predsjednik povjerenstva)
• Committee member: Dražen Balen (član povjerenstva)
• Committee member: Katarina Gobo (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2020-02-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Na mikroskopskim preparatima načinjenim iz devet uzoraka granitoidnih varijeteta uzetih duž potoka Srednja rijeka na Moslavačkoj gori promatrane su mikrostrukturne karakteristike, a cijelostijenskom analizom prikupljeni su osnovni geokemijski podaci. Iako se radi o intruzivnim magmatskim stijenama s tipičnim magmatskim strukturama, opažane su i one koje ukazuju na uvjete plastičnih deformacija (mehanizmi oporavka i mehanizmi redukcije štete) koje sugeriraju deformaciju u subsolidusnom stanju, uvjetima do otprilike 500ºC, što odgovara facijesu zelenih škriljavaca. Na temelju geokemijskih pokazatelja stijene su klasificirane kao graniti do alkalijski graniti, potvrđen je pretežito peraluminozni karakter (A/CNK>1.0) i dominantna pripadnost S-tipu granita kao jednom od bitnih odrednica kristaline podloge Moslavačke gore. Određene su i temperature solidifikacije na temelju zasićenja magme cikonijem i pokazuju raspon od 600–850°C što odgovara dosadašnjim spoznajama o evoluciji kiselih plutonskih stijena Moslavačke gore.

Abstract (english)

On thin sections made from nine samples of granitoid varieties taken along the Srednja Rijeka stream on the Moslavačka Gora were observed microstructural characteristics and basic geochemical data were collected through whole-rock analysis. Although these are intrusive igneous rocks with typical igneous structures, they also indicate conditions of plastic deformation (recovery mechanisms and damage reduction mechanisms) suggesting deformation in the subsolidus state, conditions up to approximately 500ºC, corresponding to the greenschist facies. Based on geochemical indicators, the rocks were classified as granites to alkali granites, confirmed predominantly peraluminous character (A / CNK> 1.0) and the dominant affiliation with the S-type granite as one of the essential determinants of the crystalline substrate of the Moslavačka gora. Solidification temperatures based on zirkonium saturation were also determined and showed a range of 600–850°C, which corresponds to the current knowledge about the evolution of acidic plutonic rocks of the Moslavačka gora.

• Keywords: graniti; S-tip granita; Moslavačka gora; Srednja rijeka
• Keywords (english): granite; S-type granite; Moslavačka gora; Srednja Rijeka
• Language: croatian
• URN:NBN: urn:nbn:hr:217:387376
• 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; Embargo expiration date: 2022-02-20
• Created on: 2020-07-10 10:47:33