TY  - JOUR
AU  - Miladinović, Zoran
AU  - Simić, Vladimir
AU  - Nikolić, Nenad
AU  - Jović Orsini, Nataša
AU  - Rosić, Milena
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13248
AB  - Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry (ICP-MS), and Fourier transform infrared spectroscopy (FTIR). In three localities (Rasovača, Mehane, and Ždraljevići), agate mineralization is directly related to distinct fault zones with strong local brecciation. In the other two localities (Vlasovo and Sokolov Vis), the agate is found in nodular form and does not show any connection with fracture zones. The silica phases of the Lece volcanic agates consist of cristobalite and tridymite, length-fast chalcedony, quartzine (length-slow chalcedony), and macrocrystalline quartz. Vein agates show a frequent alternation between length-fast chalcedony and quartz bands. Nodular agates consist primarily of length-fast chalcedony, occasionally containing notable quantities of opal-CT, absent in vein agates. Microtextures present in vein agates include crustiform, colloform, comb, mosaic, flamboyant, and pseudo-bladed. Jigsaw puzzle quartz microtexture supports the recrystallization of previously deposited silica in the form of opal or chalcedony from hydrothermal fluids. Growth lines in euhedral quartz (Bambauer quartz) point to agate formations in varying physicochemical conditions. These features indicate epithermal conditions during the formation of hydrothermal vein agates. Due to intense hydrothermal activity, vein agate host rocks are intensively silicified. Vein agates are also enriched with typical ore metallic elements (especially Pb, Co, As, Sb, and W), indicating genetic relation with the formation of polymetallic ore deposits of the Lece Volcanic Complex. In contrast, nodular agates have a higher content of major elements of host rocks (Al2O3, MgO, CaO, Na2O, and K2O), most probably mobilized from volcanic host rocks. Organic matter, present in both vein and nodular agate with filamentous forms found only in nodular agate, suggests formation in near-surface conditions.
T2  - Minerals
T1  - Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics
VL  - 14
IS  - 5
SP  - 511
DO  - 10.3390/min14050511
ER  - 

@article{
author = "Miladinović, Zoran and Simić, Vladimir and Nikolić, Nenad and Jović Orsini, Nataša and Rosić, Milena",
year = "2024",
abstract = "Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry (ICP-MS), and Fourier transform infrared spectroscopy (FTIR). In three localities (Rasovača, Mehane, and Ždraljevići), agate mineralization is directly related to distinct fault zones with strong local brecciation. In the other two localities (Vlasovo and Sokolov Vis), the agate is found in nodular form and does not show any connection with fracture zones. The silica phases of the Lece volcanic agates consist of cristobalite and tridymite, length-fast chalcedony, quartzine (length-slow chalcedony), and macrocrystalline quartz. Vein agates show a frequent alternation between length-fast chalcedony and quartz bands. Nodular agates consist primarily of length-fast chalcedony, occasionally containing notable quantities of opal-CT, absent in vein agates. Microtextures present in vein agates include crustiform, colloform, comb, mosaic, flamboyant, and pseudo-bladed. Jigsaw puzzle quartz microtexture supports the recrystallization of previously deposited silica in the form of opal or chalcedony from hydrothermal fluids. Growth lines in euhedral quartz (Bambauer quartz) point to agate formations in varying physicochemical conditions. These features indicate epithermal conditions during the formation of hydrothermal vein agates. Due to intense hydrothermal activity, vein agate host rocks are intensively silicified. Vein agates are also enriched with typical ore metallic elements (especially Pb, Co, As, Sb, and W), indicating genetic relation with the formation of polymetallic ore deposits of the Lece Volcanic Complex. In contrast, nodular agates have a higher content of major elements of host rocks (Al2O3, MgO, CaO, Na2O, and K2O), most probably mobilized from volcanic host rocks. Organic matter, present in both vein and nodular agate with filamentous forms found only in nodular agate, suggests formation in near-surface conditions.",
journal = "Minerals",
title = "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics",
volume = "14",
number = "5",
pages = "511",
doi = "10.3390/min14050511"
}

Miladinović, Z., Simić, V., Nikolić, N., Jović Orsini, N.,& Rosić, M.. (2024). Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics. in Minerals, 14(5), 511.
https://doi.org/10.3390/min14050511

Miladinović Z, Simić V, Nikolić N, Jović Orsini N, Rosić M. Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics. in Minerals. 2024;14(5):511.
doi:10.3390/min14050511 .

Miladinović, Zoran, Simić, Vladimir, Nikolić, Nenad, Jović Orsini, Nataša, Rosić, Milena, "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics" in Minerals, 14, no. 5 (2024):511,
https://doi.org/10.3390/min14050511 . .

TY  - JOUR
AU  - Abusahmin, Faisal
AU  - Algellai, Ahmed
AU  - Tomić, Nataša
AU  - Vuksanović, Marija M.
AU  - Majstorović, Jelena
AU  - Volkov-Husović, Tatjana
AU  - Simić, Vladimir
AU  - Jančić-Heinemann, Radmila
AU  - Toljić, Marinko
AU  - Kovačević, Jovan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8979
AB  - Basalt as a filler in a polymer-based composite material fulfils the demand of being natural, environment-friendly material for the production of various composite materials. The material could be used as protective layer and the abrasion should be tested in order to evaluate the properties of the material. The cavitation test enables the evaluation of the possible service in conditions that simulate the extensive erosion. The presence of basalt in the matrix improves the resistance to cavitation. The possibility to further improve the material could be obtained using the reinforcement of the matrix itself by incorporation of submicron ceramic particles into the composite. The obtained hybrid composite material with the addition of reinforcement in the matrix further improves the cavitation resistance.
T2  - Science of Sintering
T1  - Basalt-polyester hybrid composite materials for demanding wear applications
VL  - 52
IS  - 1
SP  - 67
EP  - 76
DO  - 10.2298/SOS2001067A
ER  - 

@article{
author = "Abusahmin, Faisal and Algellai, Ahmed and Tomić, Nataša and Vuksanović, Marija M. and Majstorović, Jelena and Volkov-Husović, Tatjana and Simić, Vladimir and Jančić-Heinemann, Radmila and Toljić, Marinko and Kovačević, Jovan",
year = "2020",
abstract = "Basalt as a filler in a polymer-based composite material fulfils the demand of being natural, environment-friendly material for the production of various composite materials. The material could be used as protective layer and the abrasion should be tested in order to evaluate the properties of the material. The cavitation test enables the evaluation of the possible service in conditions that simulate the extensive erosion. The presence of basalt in the matrix improves the resistance to cavitation. The possibility to further improve the material could be obtained using the reinforcement of the matrix itself by incorporation of submicron ceramic particles into the composite. The obtained hybrid composite material with the addition of reinforcement in the matrix further improves the cavitation resistance.",
journal = "Science of Sintering",
title = "Basalt-polyester hybrid composite materials for demanding wear applications",
volume = "52",
number = "1",
pages = "67-76",
doi = "10.2298/SOS2001067A"
}

Abusahmin, F., Algellai, A., Tomić, N., Vuksanović, M. M., Majstorović, J., Volkov-Husović, T., Simić, V., Jančić-Heinemann, R., Toljić, M.,& Kovačević, J.. (2020). Basalt-polyester hybrid composite materials for demanding wear applications. in Science of Sintering, 52(1), 67-76.
https://doi.org/10.2298/SOS2001067A

Abusahmin F, Algellai A, Tomić N, Vuksanović MM, Majstorović J, Volkov-Husović T, Simić V, Jančić-Heinemann R, Toljić M, Kovačević J. Basalt-polyester hybrid composite materials for demanding wear applications. in Science of Sintering. 2020;52(1):67-76.
doi:10.2298/SOS2001067A .

Abusahmin, Faisal, Algellai, Ahmed, Tomić, Nataša, Vuksanović, Marija M., Majstorović, Jelena, Volkov-Husović, Tatjana, Simić, Vladimir, Jančić-Heinemann, Radmila, Toljić, Marinko, Kovačević, Jovan, "Basalt-polyester hybrid composite materials for demanding wear applications" in Science of Sintering, 52, no. 1 (2020):67-76,
https://doi.org/10.2298/SOS2001067A . .