raziskovalna naloga
Simon Štefanič (Author), Mirijam Vrabec (Mentor), Simona Skobe (Co-mentor)

Abstract

V zbirki mineralov, kamnin in fosilov, ki se nahaja na Oddelku za geologijo na Naravoslovnotehniški fakulteti v Ljubljani, smo izbrali 10 vzorcev naravnega kamna magmatskih kamnin. Potrebno jih je bilo natančno interpretirati in klasificirati v določene skupine. Vzorce smo analizirali makroskopsko in mikroskopsko s pomočjo optične mikroskopije. Za natančnejšo geokemijsko analizo smo uporabili metodo rentgenske fluorescenčne spektroskopije (XRF) in masno spektrometrijo z induktivno sklopljeno plazmo (ICP-MS). Vzorce smo klasificirali v skupine s pomočjo TAS in QAP diagrama. Končni poudarek je bil na TAS klasifikaciji. Z makroskopsko in mikroskopsko analizo smo opazili, da so vsi vzorci globočnine, razen vzorcev 14707 in 14715, ki smo ju opredelili kot migmatita. Določili smo jim mineralno sestavo, ter teksturne in strukturne karakteristike. Na podlagi geokemičnih analiz smo vzorce razdelili v posamezne skupine. Tako vzorci z oznako, 14708, 14709, 14711 in 14713 spadajo v skupino granitov, vzorca 14710 in 14712 v skupino gabbrodioritov, vzorec 14714 v skupino gabbrov in vzorec 14716 v skupino monzonitov. Klasifikacija izbranih vzorcev naravnega kamna je bila opravljena na podlagi vsebnosti alkalij in kremenice. Vzorci, ki opazneje odstopajo od večine, so vzorci gabbrodioritske in gabbrske skupine, ki imajo glede na ostale manjšo vsebnost tako kremenice kot alkalij. Vzorec, ki spada v skupino monzonitov, pa od ostalih odstopa zaradi višje vrednosti alkalij.

Keywords

naravni kamen;magmatske kamnine;rentgenska fluorescenčna spektroskopija;masna spektroskopija z induktivno sklopljeno plazmo;TAS klasifikacija;QAP klasifikacija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL NTF - Faculty of Natural Sciences and Engineering
Publisher: [S. Štefanič]
UDC: 55
COBISS: 31715331 Link will open in a new window
Views: 480
Downloads: 79
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Other data

Secondary language: English
Secondary title: classification of selected specimens of igneous rocks from the collection of the Department of Geology
Secondary abstract: In the collection of minerals, stones and fossils, located in the Faculty of Natural Sciences and Engineering, Department of Geology, we selected 10 samples of natural stone belonging to the igneous rocks. They needed to be interpreted accurately and classified into specific groups. Samples were analyzed macroscopically and microscopically using optical microscopy. X-ray fluorescence spectroscopy (XRF) and inductively coupled plasma mass spectrometry (ICP-MS) were used for geochemical analysis. Samples were classified into separate groups using a TAS and QAP diagram. The emphasis was on the TAS classification. By macroscopic and microscopic analysis, we observed that all samples were plutonic rocks, except samples 14707 and 14715, which were defined as migmatite. We determined their mineral composition and textural and structural characteristics. On the basis of all detailed geochemical analysis, the samples were divided into individual groups. Thus, samples marked 14708, 14709, 14711 and 14713 belong to the granite group, samples 14710 and 14712 to the gabbrodiorite group, sample 14714 to the gabbro group and sample 14716 to the group of monzonites. Classification was preformed on the basis of alkali and silica content. The samples that noticebly deviate from the majority are samples of the gabbrodiorite and gabbro groups, which have a lower content of both quartz and alkali compared to the others. The sample, which belongs to the group of monzonites, differs from the others due to the higher value of alkalis.
Secondary keywords: natural stone;igneous rocks;X-ray fluorescence spectroscopy;inductively coupled plasma mass spectroscopy;TAS classification;QAP classification;
Type (COBISS): Final paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Naravoslovnotehniška fak., Odd. za geologijo
Pages: XII, 39 f.
ID: 12056011