Amfibolitne leće u filonitiziranim gnajsevima Krndije

master's thesis

• Title: Amfibolitne leće u filonitiziranim gnajsevima Krndije : diplomski rad
• Title (english): Amphibolite lenses in phyllonitized paragneisses of Mt. Krndija : master’s thesis
• Author: Damjan Ostrelič
• Mentor: Vesnica Garašić (mentor)
• Committee member: Vesnica Garašić (predsjednik povjerenstva)
• Committee member: Dunja Aljinović (član povjerenstva)
• Committee member: Bruno Tomljenović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mineralogy, Petrology and Mineral Resources); Zagreb
• Defense date and country: 2018-09-07, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Istraživane amfibolitne leće uložene u filonitizirane paragnajseve Krndije pripadaju Psunjsko-kutjevačkom metamorfnom kompleksu slavonskih planina. Na terenu je prikupljeno sedam uzoraka amfibolita te dva uzorka filonitiziranih gnajseva. Metodama polarizacijske mikroskopije i rendgenske difrakcije određen je mineralni sastav i petrografskse karakteristike svih uzoraka, a kemijskim metodama emisijske i masene spektrometrije s induktivno spregnutom plazmom (ICP–ES i ICP–MS) određen je kemijski sastav pet odabranih uzoraka amfibolita i jednog uzorka filonitiziranog paragnajsa.
Uzorci amfibolita su prema petrografskim karakteristikama određeni kao trakasti i „porfiroblastični“ amfiboliti, dok su gnajsevi određeni kao filonitizirani paragnajsevi. Na temelju kemijskog sastava protoliti amfibolita određeni su kao toleiitski bazalti do bazalt-andeziti zalučnog bazena, a protoliti paragnajseva kao sedimentne stijene nastale trošenjem felzičnih stijena kalcijsko–alkalijske magmatske serije peraluminijskog karaktera nastalih na aktivnom kontinentalnom rubu.
Predloženi petrogenetski model protolitnih stijena je zalučni bazen iza zone subdukcije u kojem se taložio klastični materijal deriviran iz kontinentalne kore istovremeno s povremenim izljevima bazaltnih lava.

Abstract (english)

The investigated amphibolite lenses in phyllonitized paragneisses of Mt. Krndija are a part of the Psunj-kutjevo metamorphic complex of the Slavonian mountains. Seven amphibolite field samples were taken along with two samples of paragneisses. Using polarised microscopy and X-ray diffraction, the mineral composition and petrographic characteristics of all samples were determined. Chemical composition of five selected amphibolite samples and one paragneiss sample were obtained using mass and emission spectrometry with inductively coupled plasma (ICP–MS and ICP–ES).
The investigated amphibolites were determined as linated or „porphyroblastic“ amphibolites based on their petrography, while the gneiss samples were determined as phyllonitized paragneisses. Based on the chemical composition of amphibolites, their protolith was determined as tholeiitic basalt to andesite–basalt formed in a back arc basin. The protolith of paragneisses was determined as a sedimentary rock formed by erosion of calc–alkali felsic rocks of peraluminous character at an active continental margin.
The proposed petrogenetic model of protolith rocks is a back arc basin in which siliciclastic material of continental originwas being deposited simultaneously with periodic effusions of basaltic lavas.

• Keywords: amfibolit; filonit; paragnajs; bazalt; bazaltni andezit; subdukcijska zona; vulkanski luk; zalučni bazen; metamorfizam; Krndija
• Keywords (english): amphibolite; phyllonite; paragneiss; basalt; basaltic andesite; subduction zone; volcanic arc; back arc basin; metamorphism; Mt. Krndija
• Language: croatian
• URN:NBN: urn:nbn:hr:169:123632
• Study programme: Title: Geology; specializations in: Geology of mineral resources and geophysical explorations; Course: Geology of mineral resources and geophysical explorations; 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: 2018-10-25 08:25:38