Petrogeneza vrpčastih amfibolita Moslavačke gore

master's thesis

• Title (english): PETROGENESIS OF BANDED AMPHIBOLITES FROM MOSLAVAČKA GORA
• Author: Andreja Ladišić
• Mentor: Zorica Petrinec (mentor)
• Mentor: Dražen Balen (komentor)
• Committee member: Zorica Petrinec (predsjednik povjerenstva)
• Committee member: Dražen Balen (član povjerenstva)
• Committee member: Karmen Fio Firi (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2022-02-21, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Vrpčasti amfiboliti Moslavačke gore specifičan su teksturni tip amfibolita, čije je istraživanje obuhvatilo mineralošku, petrografsku i geokemijsku analizu, te izradu petrogenetskog modela. Mikrostrukturnim istraživanjima pretpostavljeni su procesi koji odgovaraju metamorfizmu u uvjetima amfibolitnog facijesa te pojavi taljevine u proučavanim stijenama. Rezultati geokemijskih istraživanja potvrdili su bazičnu prirodu protolita, te odvijanje metamorfnih procesa u geotektonskom okruženju subdukcijske zone. Provedeno geotermobarometrijsko modeliranje u programu Perple_X dalo je vršne vrijednosti P-T uvjeta u rasponu 630 – 700°C i 800 – 950 MPa. Modelom je potvrđeno i odvijanje reakcija parcijalnog taljenja u proučavanom metabazičnom sustavu, a dobivene vrijednosti tlaka i temperatura ukazuju na regionalno-metamorfni događaj koji je morao prethoditi krednoj intruziji granita koja je imala naglašeni LP-HT karakter.

Abstract (english)

Banded amphiboliltes of Moslavačka Gora are a specific textural type of amphibolites, whose research included mineralogical, petrographic and geochemical analysis as well as the development of a petrogenetic model. Microstructural research gave general idea about processes corresponding to metamorphism in amphibolite facies conditions as well as the appearance of melt in the analysed rock samples. Geochemical research results confirmed the basic nature of protoliths and the onset of metamorphic processes in the subduction zone geotectonic environment. The geothermobarometric modelling done using the Perple_X program gave peak P-T condition values in the range of 630 – 700°C and 800 – 950 MPa. The model also confirmed the development of partial melting reactions in the analysed metabasic system. The obtained pressure and temperature values indicate a regional-metamorphic event that must have preceded the Cretaceous intrusion of granite, which had a pronounced LP-HT character.

• Keywords: Moslavačka gora; vrpčasti amfibolit; geotermobarometrija; parcijalno taljenje; subdukcija
• Keywords (english): Moslavačka gora; banded amphibolite; geothermobarometry; partial melting; subduction
• Language: croatian
• URN:NBN: urn:nbn:hr:217:075530
• 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: Embargoed access; Embargo expiration date: 2024-02-21
• Created on: 2022-10-14 09:20:09