Mineraloška obilježja eocenskih lapora iz flišne serije područja Baške (otok Krk) i jugozapadne obale otoka Hvara

master's thesis

• Title (english): MINERALOGICAL PROPERTIES OF EOCENE MARLS FROM FLYSCH SEQUENCES OF THE BAŠKA AREA (KRK ISLAND) AND SOUTHWEST COAST OF HVAR ISLAND
• Author: Ana Maljković
• Mentor: Nenad Tomašić (mentor)
• Committee member: Nenad Tomašić (predsjednik povjerenstva)
• Committee member: Dražen Kurtanjek (član povjerenstva)
• Committee member: Vlasta Ćosović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2023-02-22, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

U ovom radu istraženi su uzorci srednjoeocenskih lapora s tri lokaliteta na otocima Krk i Hvar. Metodama kalcimetrije i rendgenske difrakcije utvrđen je volumni udio karbonata, te mineralni sastav kojeg čine kalcit, kvarc i plagioklasi, te minerali glina klorit, illit, illit/smektit, dioktaedarski vermikulit i kaolinit. Mineraloška svojstva su proučavana s ciljem pronalaženja dokaza o tragovima srednjoeocenskih klimatskih optimuma. Rezultati ne upućuju direktno na uvjete tople i vlažne klime. Veća prisutnost illita i klorita ukazuje na prevladavajuće fizičko trošenje. Prisutnost kaolinita u pojedinim uzorcima može upućivati na djelomice povećano kemijsko trošenje, a time i na nešto vlažniju i topliju klimu, dok prisutnost smektita ukazuje na sezonalnost klime.

Abstract (english)

In this study, samples of Middle Eocene marls from three localities on the islands of Krk and Hvar were investigated. Calcimetry and X-ray diffraction methods were used to determine the volume fraction of carbonates, and the mineral composition of the samples. The marl samples contain calcite, quartz and plagioclase, as well as clay minerals chlorite, illite, illite/smectite, dioctahedral vermiculite and kaolinite. Mineralogical properties were studied in order to find evidence of traces of the Middle Eocene climatic optima. The results do not significantly imply warm and humid climate conditions. Prevailing content of illite and chlorite indicates predominant physical weathering. The presence of kaolinite in some samples could point to partly increased chemical weathering, and thus to a more humid and warmer climate, and occurrence of smectite implies climate seasonality.

• Keywords: lapori; minerali glina; rendgenska difrakcija; srednjoeocenski klimatski optimum; Krk; Hvar
• Keywords (english): marls; clay minerals; X-ray diffraction; Middle Eocene Climatic Optimum; Krk; Hvar
• Language: croatian
• URN:NBN: urn:nbn:hr:217:791316
• Project: Number: IP-2019-04-5775; Title: Dinaridski predgorski bazen između dva eocenska termalna optimuma: mogući scenarij za sjevernojadranski bazen; Title: Dinaridic foreland basin between two Eocene thermal optima: a possible scenario for the Northern Adriatic; Acronym: BREEMECO; Leader: Vlasta Ćosović; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Graduate university study of Environmental 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: 2023-06-21 10:58:48