Magnetski susceptibilitet u Slovačkoj jami i Jamskom sustavu Kita Gaćešina-Draženova puhaljka na Velebitu

master's thesis

• Title: Magnetski susceptibilitet u Slovačkoj jami i Jamskom sustavu Kita Gaćešina-Draženova puhaljka na Velebitu : diplomski rad
• Title (english): Magnetic susceptibility in pit "Slovačka jama" and pit system "Kita Gaćešina-Draženova puhaljka" on Velebit : master’s thesis
• Author: Ana Kamenski
• Mentor: Uroš Barudžija (mentor)
• Committee member: Uroš Barudžija (predsjednik povjerenstva)
• Committee member: Igor Vlahović (član povjerenstva)
• Committee member: Dalibor Paar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mineralogy, Petrology and Mineral Resources); Zagreb
• Defense date and country: 2018-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Mineralogy and Petrology

Abstract

Magnetizam u speleološkim objektima u Republici Hrvatskoj izuzetno je slabo istražen iako je dobro poznato da su špiljski sedimenti veoma dobro očuvani. Za područja istraživanja odabrana su dva značajna hrvatska speleološka objekta, najdulji objekt Jamski sustav Kita Gaćešina-Draženova puhaljka i Slovačka jama, druga po dubini iza Jamskog sustava Lukina jama-Trojama. Mjera magnetičnosti materijala, odnosno magnetski susceptibilitet mjeren je u speleološkim objektima uređajem Kappameter KM-7 i u laboratoriju na Hrvatskom geološkom institutu pomoću uređaja Bartington MS2B System. Na svim lokacijama mjeren je i uzorkovan isključivo meki sediment. Lokacije profila izabrane su isključivo prema dostupnosti uzorkovanja. U laboratoriju Zavoda za mineralogiju, petrologiju i mineralne sirovine analiziran je sa svakog profila jedan karakterističan uzorak metodom rendgenske difrakcije u prahu (XRD), te je jedan od njih separiran na magnetske frakcije Frantzovim magnetskim izodinamskim separatorom nakon čega je analiziran stereoskopskom lupom. Analizom magnetskog susceptibiliteta utvrđena je njegova mjerljivost u speleološkim sedimentima. Na nekoliko profila uočena je značajna promjena u vrijednostima magnetskog susceptibiliteta te su objašnjene razlikama u mineraloškom sastavu. Primjećena je povezanost viših vrijednosti magnetskog susceptibiliteta s većom količinom minerala koji u sebi sadrže metale. Također se ustanovilo da dva korištena uređaja u ovom radu nisu kompatibilna, odnosno ne registriraju na istim uzorcima jednake niti usporedive vrijednosti. S obzirom na preciznost Bartington MS2B uređaja, pretpostavlja se da Kappameter KM-7 nije adekvatno korišten ili da nije prilagođen uvjetima niske temperature i visoke vlažnosti.

Abstract (english)

Magnetism in speleological sites in the Republic of Croatia is extremely poorly researched although it is well known that cave sediments are well preserved. Two important Croatian speleological sites were selected for the research area, the longest site the Pit system „Kita Gaćešina-Draženova puhaljka“ and the pit „Slovačka jama“, the second in depth after the Pit system „Lukina jama-Trojama“. Measurement of material magnetism, i.e. magnetic susceptibility was measured in speleological sites with the Kappameter KM-7 and in the laboratory at the Croatian Geological Survey using Bartington MS2B System. Only soft sediment was measured and sampled at all locations. Profile locations were selected solely according to the availability of sampling. In the laboratory of the Department of mineralogy, petrology and mineral resources a characteristic sample was analyzed from each profile by X-ray powder diffraction method and one of them is separated into magnetic fractions by Frantz's magnetic isodynamic separator after which it was analyzed by stereoscopic lens. Analyzing magnetic susceptibility determined its measurability in speleological sediments. Significant changes in the values of magnetic susceptibility were observed on several profiles and explained by the differences in the mineral composition. The correlation of higher values of magnetic susceptibility with higher amounts of minerals containing metals is noticed. It has also been established that the two devices used in this paper are not compatible, they don't registere on the same samples equal or comparable values. Given the precision of the Bartington MS2B, it is assumed that the KM-7 Kappameter is not used properly or is not adapted to low temperature and high humidity conditions.

• Keywords: magnetski susceptibilitet; Slovačka jama; Jamski sustav Kita Gaćešina-Draženova puhaljka
• Keywords (english): magnetic susceptibility; pit "Slovačka jama"; Pit system "Kita Gaćešina-Draženova puhaljka"
• Language: croatian
• URN:NBN: urn:nbn:hr:169:693990
• Study programme: Title: Geology; specializations in: Geology of mineral resources and geophysical explorations; Course: Geology of mineral resources and geophysical explorations; 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: 2019-01-16 13:57:46