Zlato u Ludvić potoku Samoborskog gorja

master's thesis

• Title: Zlato u Ludvić potoku Samoborskog gorja : diplomski rad
• Title (english): Gold in the stream Ludvić of Samobor hills : master's thesis
• Author: Alan Potkonjak
• Mentor: Stanko Ružičić (mentor)
• Committee member: Stanko Ružičić
• Committee member: Sibila Borojević Šoštarić
• 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 svrhu određivanja koncentracije zlata u potoku Ludvić Samoborskog gorja uzorkovano je 13 uzoraka
vodotočnog sedimenta koji su se ispitivanjem pomoću Goldspear uređaja na terenu pokazali perspektivnim.
Drenažni teren sastoji se od raznih litostratigrafskih jedinica od kojih su najvažnije: P2,3, T1, T3, K2. Sijanjem
je određen njihov granulometrijski sastav te parametri poput koeficijenta sortiranosti i koeficijenta asimetrije.
Najperspektivniji uzorci su detaljnije obrađivani. Separacija mineralnih frakcija obavljena je pomoću
Frantzovog izodinamskog separatora i bromoforma. Dobivene frakcije promatrane su kasnije binokularom
radi utvrđivanja prisustva zlata i pratećih minerala. Uzorci su zatim otapani u zlatotopci te snimani pomoću
atomske apsorpcijske spektrometrije (AAS).Koncentracija zlata je ispod granice detekcije (< 20 ppb). Uzorci
su mljeveni u čeličnom mlinu i snimani metodom difrakcije na prahu (XRD).Iz difrakcijskih slika uzoraka
određen je petrografski sastav. Detaljna determinacija petrografskog sastava obavljena je promatranjem
uzoraka pod binokularom. Vidljivo zlato nije pronađeno. Određene su i matične stijene koje odgovaraju
lokalnoj geologiji.

Abstract (english)

Abstract: In order to determine the concentration of gold in the stream Ludvić of Samobor hills, 13 samples of
aquiferous sediment that have been analysed by Goldspear device, proved to be prospective. The drainage
terrain consists of different lithostratographic units out of which P23, T1, T3 and K2 were the most
dominant. Their granulometric composition was determined by sifting as well as respective parameters such
as a coefficient of sorting and assymetry coefficient.Further analysis of the most prospective samples was
conducted.The separation of mineral fractions was achieved by means of Frantz isodynamic separator and
use of bromoform.The fractions obtained were closely examined by binocular in order to find the presence of
gold and accompanying minerals. The samples were then dissolved in aqua reqia and photografed by means
of atomic absorbtion spectometry (AAS).According to the results, the concentration of gold is below the
boundary line of detection (<20ppb>).The samples were also grinded in a steel mill and recorded by XRD
method. The diffraction photos of the samples helped to determine petrographic composition .Further
determination of the petrographic composition was carried out by thorough observation under the binocular.
As a result, visible gold was not found.Primary rocks that correspond to local geology were also determined.

• Keywords: Samoborsko gorje; potok Ludvić; zlato; atomska apsorpcijska spektrometrija; difrakcija na prahu; zlatotopka; petrografski sastav; matične stijene; teška frakcija
• Keywords (english): Samobor hills; stream Ludvić; gold; atomic absorption spectrometry; powder diffraction; aqua reqia; primary rocks; mineral content; heavy fraction
• Language: croatian
• URN:NBN: urn:nbn:hr:169:272643
• 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 10:48:17