Geokemijske značajke sedimenata područja Novigradskog mora

doctoral thesis

• Title (english): Geochemical characteristics of sediments of the Novigrad sea area
• Author: Željka Fiket; MBZ: 254954
• Mentor: Goran Kniewald (mentor)
• Committee member: Mladen Juračić (predsjednik povjerenstva)
• Committee member: Vladimir Bermanec (član povjerenstva)
• Committee member: Delko Barišić (član povjerenstva); MBZ: 129652
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2014-01-27, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Interdisciplinary Natural Sciences; Marine Science
• Universal decimal classification (UDC): 55 - Geology. Meteorology. Hydrology ; 502/504 - Environmental science. Conservation of natural resources. Threats to the environment and protection against them

Abstract

Novigradsko more uvučeni je zaljev Jadranskog mora u čijem se sjeveroistočnom dijelu ulijeva rijeka Zrmanja tvoreći visokostratificirani estuarij. Istraživanje geokemijskih, sedimentoloških i mineraloških značajki sedimenata šireg područja Novigradskog mora provedeno je u svrhu određivanje podrijetla materijala, uvjeta taloženja te prirodnih i antropogenih faktora utjecaja na sedimentaciju u Novigradskom moru. Rezultati istraživanja pokazali su da je sastav recentnih sedimenata Novigradskog akvatorija određen prvenstveno prirodnim čimbenicima, iako sporadično nalazimo i utjecaj antropogenog djelovanja. Sastav istraživanih recentnih sedimenata, osim geološkom podlogom, hidrodinamskim uvjetima i biogenom produkcijom, uvjetovan je i fizikalnokemijskim procesima koji reguliraju donos otopljene i partikulatne faze rijekama Zrmanjom i Karišnicom te koagulacijom donešenog koloidnog materijala duž gradijenta saliniteta. Materijal donešen rijekom Zrmanjom dijelom se taloži na ušća rijeke u Novigradsko more dok se neistaloženi materijal u suspenziji odnosi dalje i taloži u dubljim dijelovima bazena. Reoksidacija metalnih oksida na granici voda-sediment čini sedimente Novigradskog mora mjestom odlaganja metala. Zatvorenost bazena i ograničena izmjena vode s Novigradskim morem uvjetuje u Karinskom moru pojavu suboksičnih uvjeta. Većina materijala donešena rijekama Zrmanjom i Karišnicom zadržava se na području Novigradskog i Karinskog mora. Sastav sedimenata rijeke Zrmanje upućuje na utjecaj tvornice Jadral i prijenos materijala iz njezine neposredne blizine u vodeni sustav rijeke Zrmanje vjetrom. Sastav površinskih i pridnenih voda istraživanog područja odražava geološku i hidrogeološku podlogu, dok je raspodjela u vodenom stupcu uvjetovana salinitetom i remobilizacijom elemenata iz sedimenta u vodeni stupac.

Abstract (english)

Novigrad Sea is a small bay of the Adriatic Sea in which northeastern part Zrmanja River discharges and forms highly stratified estuary. Investigation of geochemical, sedimentological and mineralogical characteristics of sediments of wider area of the Novigrad Sea was conducted in order to determine the origin of the material, the deposition conditions as well as natural and anthropogenic factors of influences on sedimentation in the Novigrad Sea. The results showed that the composition of the Novigrad Sea sediments is primarily
determined by natural factors, although sporadically we find the impact of anthropogenic activities. Composition of the investigated sediments is influenced by geological background, hydrodynamic conditions, biogenic production as well as the physico-chemical processes that govern the yield of dissolved and particulate phases of the Zrmanja River and Karišnica River and coagulation of colloidal materials along the salinity gradient. Material brought by Zrmanja River partly deposits on the mouth of the river in the Novigrad Sea while the material in suspension deposits in the deeper parts of the basin. Reoxidation of metal oxides at the water-surface interface makes Novigrad Sea sediments place of trace element disposal. Most of the material brought by River Zrmanja and River Karišnica deposits within the Novigrad Sea and the Karin Sea area. The composition of the Zrmanja River sediments indicates the impact of the ex-alumina factory Jadral and transfer by wind of the material from its immediate proximity to the water system of the Zrmanja River. The composition of surface and bottom water of the Novigrad Sea area reflects the geological and hydrogeological background, while the distribution of trace elements in the water column is determined by salinity and remobilization of elements from the sediment into the water column.

• Keywords: elementi u tragovima; geokemijske značajke; Karinsko more; Novigradsko more; rijeka Zrmanja; sedimentacija
• Keywords (english): geochemical characteristics; Karin Sea; Novigrad Sea; sedimentation; trace elements; Zrmanja River
• Language: croatian
• URN:NBN: urn:nbn:hr:217:938539
• Study programme: Title: Interdisciplinary doctoral study in Oceanology; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje interdisciplinarne prirodne znanosti (znanost o moru) (doktor/doktorica znanosti, područje prirodnih znanosti, polje interdisciplinarne prirodne znanosti (znanost o moru))
• Type of resource: Text
• Extent: 309 str. ; 30 cm
• File origin: Born digital
• Access conditions: Open access
• Public note: Rad je izrađen na Institutu Ruđer Bošković, Zavodu za istraživanje mora i okoliša u Zagrebu, u sklopu interdisciplinarnog doktorskog studija oceanologije na Geološkom odsjeku, Prirodoslovno-matematičkog fakulteta u Zagrebu.
• Created on: 2017-11-22 14:17:17