Mineraloške i sedimentološke značajke recentnog sedimenta iz Rogozničkog jezera

master's thesis

• Title: Mineraloške i sedimentološke značajke recentnog sedimenta iz Rogozničkog jezera : diplomski rad
• Title (english): Mineralogical and sedimentological characteristics of the recent sediments originating from Rogoznica lake : master's thesis
• Author: Matea Domitrović
• Mentor: Ivan Sondi (mentor)
• Committee member: Ivan Sondi
• Committee member: Goran Durn
• Committee member: Uroš Barudžija
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mineralogy, Petrology and Mineral Resources); Zagreb
• Defense date and country: 2015-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

U ovom diplomskom radu istražene su sedimentološke, mineraloške i morfološke značajke recentnog
sedimenta iz jezgre korera duljine 50 cm uzorkovane u Rogozničkom jezeru. Granulometrijske značajke
sedimenata analizirane su metodom laserske difrakcije (LD), mineraloški sastav određen je metodom
rendgenske difrakcije na prahu (XRD), morfološke značajke mineralnih čestica istražene su pretraženim
elektronskim mikroskopom s visokim razlučivanjem (FE-SEM). Rezultati ukazuju da Rogozničko
jezero predstavlja anoksični sedimentacijski okoliš. Sediment s dubinom ne pokazuje značajno odstupanje
u veličini čestica sedimenta te je prema Shepard (1954) klasificiran kao silt. Dominantna mineralna faza su
karbonati (kalcit i aragonit). Specifični fizikalno-kemijski uvjeti ispod oksično-anoksično granice
pogoduju nastanku autigenog pirita nanometarskih dimenzija. Morfološke značajke igličastog aragonita
ukazuju da je aragonita organskog podrijetla nastao precipitacijom iz vodene otopine.

Abstract (english)

Abstract: This thesis describes the sedimentological and mineralogical properties of recent sediments Rogoznica
lake. Granulometric characteristics of sediments were analyzed by laser diffraction (LD), mineralogical
composition was determined by X-ray powder diffraction (XRD), the morphological features of mineral
particles were determined by field emission scanning electron microscopy (FE-SEM). The results
indicate that Rogoznica lake represents anoxic sedimentary environment. Sediments with depth does
not show significant variations in the sediment grain and it is classified as silt (Shepard, 1954). The
dominant mineral phase are carbonates (calcite and aragonite). The specific physical and chemical
conditions under oxic-anoxic boundary conducive to emergence autogenic pyrite nanometer
dimensions. Morphological characteristics of needle aragonite indicate that aragonite is organic origin
formed by precipitation from water solutions.

• Keywords: reduktivni uvjeti; fraimboidalni pirita; karbonati i porijeklo; sedimentološke značajke
• Keywords (english): reductive conditions; framboidal pyrite; carbonates and origin; sedimentological features
• Language: croatian
• URN:NBN: urn:nbn:hr:169:136953
• Study programme: Title: 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: 2015-12-17 09:18:14