Granulometrijske karakteristike i kalcimetrija sedimenata iz jezgre u delti rijeke Neretve

master's thesis

• Title (english): Granulometric characteristics and calcimetry of the core sediments from the Neretva river delta
• Author: Diana Frankol
• Mentor: Mladen Juračić (mentor)
• Committee member: Mladen Juračić (predsjednik povjerenstva)
• Committee member: Marijan Kovačić (član povjerenstva)
• Committee member: Vlasta Ćosović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2015-11-25, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Interpretacija rezultata provedenog istraživanja, prikazana u ovom radu, opisuje i objašnjava promjene u okolišima taloženja na području delte rijeke Neretve kroz mlađi pleistocen i holocen, kao i utjecaj promjene razine mora na sedimentaciju i oblikovanje same delte. Na 38 uzoraka sedimenata iz jezgre DP (dubina 119 m) izvađene u deltnoj ravnici rijeke Neretve, napravljene su granulometrijske analize, koje pokazuju jasnu podijeljenost jezgre na dva dijela: gornji (plići) (0 - 30 m) i donji (dublji) (30 - 119 m). U donjem dijelu jezgre, dominantno se nalaze pjeskovito-šljunkoviti sedimenti, taloženi u aluvijalnim okolišima mlađeg pleistocena, kada je razina mora bila znatno niža od današnje. U gornjem dijelu jezgre, od 30 m dubine pa do površine, prevladava muljeviti sediment, koji odgovara taloženju u uvjetima nakon razdoblja posljednjeg glacijala, kada je more preplavilo nekadašnju neretvansku dolinu i stvorilo duboki estuarij. Rezultati kalcimetrije, provedene na uzorcima iz plićeg dijela jezgre (0 - 30 m), kreću se u rasponu od 31% - 54% i pokazuju taloženje u uvjetima miješano karbonatno-siliciklastičnog šelfa, kakvi danas vladaju u području istočnog dijela Jadranskog mora. S obzirom na veliku ekološku i ekonomsku važnost najznačajnije delte na obali Hrvatske, sustavno istraživanje evolucije delte rijeke Neretve i procesa koji se odvijaju u njoj mogli bi značajno doprinijeti njenoj zaštiti i očuvanju.

Abstract (english)

Interpretation of results obtained by this research describes and explains changes of depositional environments in the area of the Neretva River delta during Younger Pleistocene and Holocene, as well as influence of the sea-level changes on sedimentation and development of delta. Granulometric analyses were done on 38 samples from the core DP (119 m depth) extracted from the deltaic plain of the Neretva River. Results showed that the core could be divided in two parts: upper (0 - 30 m) and lower (30 - 119 m) part. The lower part of the core contains dominantly gravely and sandy sediments, which were probably deposited in the alluvial environments in the Younger Pleistocene, when the sealevel was much lower than today. In the upper part of the core, muddy sediment is prevailing, and this was interpreted as deposition after last glacial period, when sea flooded former Neretva River valley and created deep estuary. Results of calcimetry in the upper (muddy) part of the core showed values between 31% - 54% which reflects deposition in the conditions of carbonate-siliciclastic shelf, which are present today in the eastern part of the Adriatic Sea. Neretva River delta is the most significant delta in Croatian coast, with huge ecological and economic importance, and systematic researches of the evolution of the delta and processes in the delta could significantly contribute to its protection.

• Keywords: delta; granulometrijske karakteristike; kalcimetrija; rijeka Neretva; taložni okoliši
• Keywords (english): calcimetry; depositional environments; delta; granulometric characteristics; Neretva River
• Language: croatian
• URN:NBN: urn:nbn:hr:217:189722
• 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: 2017-02-08 11:19:07