Promjene okoliša zapisane u jezgri iz deltne ravnice rijeke Mirne

master's thesis

• Title (english): Environmental changes recorded in the Mirna River from the delta plain
• Author: Irena Katanec
• Mentor: Mladen Juračić (mentor)
• Committee member: Mladen Juračić (predsjednik povjerenstva)
• Committee member: Dražen Kurtanjek (član povjerenstva)
• Committee member: Borna Lužar-Oberiter (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2017-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology

Abstract

Sedimentološkim analizama granulometrijskog sastava i kalcimetrije te makro-paleontološkim analizama biogenih ostataka materijala u jezgri MIR1 iz deltne ravnice rijeke Mirne pokušala se rekonstruirati morska razina tijekom prošlosti. Također, pokušali su se rekonstruirati taložni facijesi u ušću rijeke te geomorfološki razvoj i evoluciju okoliša. U ovom radu također su ispitivani preciznost i točnost terenskih metoda procjene granulometrijskog sastava usporedbom s egzaktnim rezultatima laboratorijskih analiza. Strukturno gledano, područje porječja Mirne dio je vanjskih Dinarida kojima dominiraju vapnenci taloženi na Jadransko-Dinarskoj karbonatnoj platformi u vremenskom rasponu od krede do eocena. Nakon transgresije u holocenu razina mora je dosezala nekoliko kilometara više uzvodno u riječnu dolinu od današnje obalne linije. U zadnjih 7000 do 6000 godina delta unutar estuarija rijeke Mirne progradirala je prema Jadranskom moru te se tako razvila današnja obalna linija. Sedimentna jezgra MIR1 sadrži zapise o tim promjenama budući da svaki taložni okoliš sadrži karakteristične fosilne zajednice i sedimentne značajke koje odražavaju uvjete života i sedimentacije materijala u tim taložnim okolišima kako je ušće rijeke progradiralo s vremenom. Antropogeni utjecaj na riječno ušće i obalu rijeke Mirne konstantno se povećavao i potpomognuo je evoluciji obale budući da traje još od 6. tisućljeća pr. Kr. kada se ljudi prvi put naseljavaju na tom području.

Abstract (english)

Using sedimentological analyses of granulometric composition, calcimetry and macropaleontological analysis of biogenous material residues in the MIR1 core of the Mirna River delta plain the reconstruction of the past relative sea levels, depositional facies in the Mirna River and the geomorphological and environmental evolution was attempted. This thesis also examines the precision and accuracy of field methods by comparing them with the exact results of laboratory analysis. The area of the Mirna River valley is structurally part of the External Dinarides which are dominated by limestones deposited on the Adriatic-Dinaric carbonate platform in the time range from Cretaceous to the Eocene. After the Holocene trangression sea level reached upstream in the Mirna River valley for a few kilometers further than the recent coastal line does. In the last 7,000 to 6,000 years, the Mirna River intra-estuarine delta has prograded into the Adriatic Sea. The sediment core MIR1 contains records of these changes in the environment since each depositional environment contains characteristic fossil assemblages and sedimentary characteristics that reflect the living conditions and sedimentation conditions of the material as the river progressed over time. Human activity has been continuously increasing and furthering the evolution of Mirna River valley and the estuarine (bay-head) delta and the river banks since it began 6000 years ago BC when the first settlers arrived in the area.

• Keywords: delta unutar estuarija; estuarij; granulometrija; holocen; kalcimetrija; promjene morske razine; rijeka Mirna
• Keywords (english): calcimetry; estuary; estuarine (bay-head) delta; granulometry; Holocene; Mirna River; sea level changes
• Language: croatian
• URN:NBN: urn:nbn:hr:217:949922
• 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: 2018-01-29 14:21:21