Minerali glina kao indikatori termalnih promjena u stijenama okolice Hrvatske Kostajnice

master's thesis

• Title (english): Clay minerals as indicators of thermal alteration in the rocks in the vicinity of Hrvatska Kostajnica
• Author: Ena Topalović
• Mentor: Darko Tibljaš (mentor)
• Committee member: Darko Tibljaš (predsjednik povjerenstva)
• Committee member: Dražen Balen (član povjerenstva)
• Committee member: Borna Lužar-Oberiter (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2017-05-22, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

U ovom radu istraživane su sedimentne i metasedimentne stijene kredne do ranopaleogenske starosti s područja Unutrašnjih Dinarida. Uzorci su prikupljeni na prostorima sjeveroistočne Banovine nedaleko od Hrvatske Kostajnice i manjih naselja kao što su Donja i Gornja Velešnja, Volinja i Prevršac. U svrhu određivanja mineralnog sastava i stupnja metamorfnih promjena korištena je metoda rendgenske difrakcije uključujući ''kristalinitet'' illita i klorita. Rezultati su pokazali da su u ranopaleogenskim stijenama od minerala glina najzastupljeniji smektiti uz primjese illita i klorita što ukazuje na dijagenetske uvjete. Miješanoslojni klorit-smektiti i corrensit također su nađeni u pojedinim uzorcima. Stijene kredne starosti sadrže illite i klorite bez smektitnih slojeva što je karakteristično za anhizonu. Stupanj metamorfnih promjena utvrđen je izmjerenim Küblerovim i Árkaijevim indeksima koji indiciraju dijagenetske promjene u ranopaleogenskim stijenama, te anhimetamorfne promjene u stijenama kredne starosti.

Abstract (english)

In this study Cretaceous and Eocene clastic and metasedimentary rocks, which crop out as a part of the Inner Dinarides, have been investigated. Rock samples were collected in the vicinity of Hrvatska Kostajnica, Donja and Gornja Velešnja, Volinja and Prevršac in the northeastern part of Banovina. In order to determine the mineral composition and degree of thermal changes of the examined rocks standard X-ray powder diffraction analysis was used including illite and chlorite ''crystallinity''. Results show that clay minerals in early Paleogene rocks are represented mainly by smectite with a small amount of illite and chlorite which is typical for the diagenetic zone. Mixed-layer chlorite-smectite and corrensite are also present in some of studied samples. Cretaceous rocks contain discrete illite and discrete chlorite characteristic for the anchizone. Kübler and Árkai indices values confirm diagenetic conditions for the early Paleogene rocks and anchimetamorphic conditions for the Cretaceous rocks.

• Keywords: Banovina; dijageneza; ''kristalinitet'' illita; ''kristalinitet'' klorita; minerali glina; vrlo niski stupanj metamorfizma; Unutrašnji Dinaridi; XRD analiza
• Keywords (english): Banovina; chlorite ''crystallinity''; clay minerals; diagenesis; illite ''crystallinity''; Inner Dinarides; very low-grade metamorphism; XRD analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:217:491557
• 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: 2019-05-22
• Created on: 2017-05-26 07:56:06