Mineraloška analiza kaolinitiziranih granita Prosare i Motajice

master's thesis

• Title: Mineraloška analiza kaolinitiziranih granita Prosare i Motajice : diplomski rad
• Title (english): Mineralogical analysis od kaolinitized granites of Prosara and Motajica mountains : master's thesis
• Author: Lucija Asić
• Mentor: Sibila Borojević Šoštarić (mentor)
• Committee member: Sibila Borojević Šoštarić (predsjednik povjerenstva)
• Committee member: Goran Durn (član povjerenstva)
• Committee member: Stanko Ružičić (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: 2022-02-17, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology

Abstract

Na području planinskog masiva Motajice sakupljeno je i analizirano 10 uzoraka kaolinitiziranog granita i 1 uzorak kaolinitiziranog pegmatita, dok je na planinskom masivu Prosare analiziran 1 uzorak kaolinitiziranog granita. Na većim izdanicima uočene su tipične hidrotermalne kvarcne ţile ispunjene muskovitom/bijelim tinjcima i sulfidima. Makroskopskom analizom prikupljenih uzoraka utvrđeno je da su uzorci sličnog mineralnog sastava. U uzorcima su prisutni kvarc, feldspati, tinjci te minerali glina, pretpostavljeno kaolinit. Netretirani uzorci i uzorci tretirani etilenglikolom, dimetilsulfoksidom i ţarenjem na 350 °C i 550 °C podvrgnuti su XRD analizi. Navedene metode korištene su u svrhu određivanja mineralnog sastava, identifikacije minerala glina i određivanja postanka leţišta kaolinitiziranog granita. XRD analizom potvrđen je makroskopski određen mineralni sastav, prisutnost kaolinita i tipičnih hidrotermanih minerala dijaspora, dikita i topaza koji ukazuju na hidrotermalan način postanka leţišta kaolinita. Nakon sušenja uzoraka, utvrđen je mineralni sastav u kojem dominiraju kvarc, muskovit, K-feldspat, plagioklas i kaolinit. Na tretiranim uzorcima potvrđeno je postojanje kaolinita. Hidrotermalna aktivnost imala je vaţnu ulogu u formiranju leţišta kaolinita što je utvđeno na temelju prisutne hidrotermalne mineralizacije. Međutim, budući da su uzorci uzeti s površinskih izdanaka, supergeni način postanka se ne moţe isključiti.

Abstract (english)

In the area of the Motajica mountain massif, 10 samples of kaolinitized granite and 1 sample of kaolinitized pegmatite were collected and analyzed, while 1 sample of kaolinitized granite was analyzed in the Prosare mountain massif. On the larger outgrowths, typical hydrothermal quartz veins were observed, which were filled with muscovite/white mica and sulfides. Macroscopic analysis of the collected samples determined that the samples had a similar mineral composition. In the samples, quartz, feldspars, mica and clay minerals are present, and persumably, kaolinite. Untreated samples and samples treated with ethyleneglycol, dimethylsulfoxide and annealing at 350 °C and 550 °C were exposed to XRD analysis. These methods were used for determination of the mineral composition, identification of clay minerals and determination of the formation of deposits of kaolinized granite. XRD analysis confirmed the macroscopically determined mineral composition, the presence of kaolinite and typical hydrothermal minerals of diaspora, dickite and topaz, which indicate the hydrothermal way of origin of kaolinite deposits. After drying, diffraction records of XRD analysis gave a mineral composition dominated by quartz, muscovite, K-feldspar, plagioclase and kaolinite. The existance of kaolinite was confirmed in treated samples. Hydrothermal activity had a big role in the forming of the kaolinite deposits which is confirmed by the presence of hydrothermal mineralization. On the other hand, samples were taken from the surface outcrops so supergene origin can not ruled out.

• Keywords: Motajica; Prosara; granitoidi; kaolinizacija; mineraloški sastav
• Keywords (english): Motajica mountain; Prosara mountain; granitoids; kaolinitization; mineral composition
• Language: croatian
• URN:NBN: urn:nbn:hr:169:102705
• 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: 2022-05-06 08:57:06