P-T put metamorfnih stijena amfibolitnog facijesa iz Dinaridske ofiolitne zone

master's thesis

• Title (english): P-T path of amphibolite facies metamorphic rocks of Dinaric ophiolite zone
• Author: Lucija Premužak
• Mentor: Dražen Balen (mentor)
• Committee member: Dražen Balen (predsjednik povjerenstva)
• Committee member: Zorica Petrinec (član povjerenstva)
• Committee member: Blanka Cvetko Tešović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2017-05-05, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Područje krivajsko-konjuškog ultramafitnog masiva karakterizira geološka složenost i raznovrsnost metamorfnih stijena. P-T put stijena amfibolitnog facijesa s područja okolice Vareša rekonstruiran je na osnovu konstrukcije P-T pseudopresjeka (engl. „pseudosections“), cjelostijenske geokemije, kemijskog sastava minerala i termodinamskih podataka. Evolucijski put stijena metamorfnog đona, odnosno uzoraka D4, D6 i D9, promatran je u okviru kolizijskih i subdukcijskih procesa na rubu mezozojskog Tethysa, odnosno dodirnog područja Europske ploče i Gondwane. Tako su bazaltni protoliti uzoraka D4 i D6, determiniranih kao amfiboliti, smješteni u tektonski okoliš intraoceanske subdukcije uslijed zatvaranja Tethysa. Evolucijski put uzorka D9, determiniranog kao granulit, nešto je drugačiji, odnosno ukazuje na veću dubinu formacije stijene te mu je protolit određen kao peridotit. Krivajski dio masiva potječe od subducirane oceanske kore u intraoceanskoj subdukciji prilikom koje se formirao metamorfni đon. Prilikom kolizije Gondwane i Europske ploče, metamorfni đon je navučen na europski dio te je smješten između krivajskog i konjuškog dijela ultramafitnog masiva.

Abstract (english)

The area of Krivaja-Konjuh ultramafic massif is a complex structure and contains interesting metamorphic rocks. P-T path of amphibolite facies metamorphic rocks from Vareš area was reconstructed using pseudosections, whole-rock geochemistry, chemical composition of minerals and thermodynamic results. P-T evolution path of metamorphic sole rocks (samples D4, D6 and D9) was interpreted in the frame of collisional and subduction processes that happened during the closure of Tethys, respectively at collisional point of Gondwana and European plate. Samples D4 and D6 are determinated as amphibolites with basalt protolithes which were situated in tectonic environment of intraoceanic subduction. Sample D9, determinated as granulite, has a P-T path which indicates deeper point of rock formation. Its protolith is probably peridotite. Krivaja part of ultramafic massif originates from subducted oceanic plate in intraoceanic subduction during which metamorphic sole has formed. Finally, when collision of Gondwana and European plate happened, metamorphic sole was thrust onto European plate and was situated between Krivaja and Konjuh parts of ultramafic massif.

• Keywords: Krivaja-Konjuh; metamorfni đon; amfiboliti; P-T pseudopresjek
• Keywords (english): Krivaja-Konjuh; metamorphic sole; amphibolites; P-T pseudosection
• Language: croatian
• URN:NBN: urn:nbn:hr:217:681662
• 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: 2017-05-10 10:42:50