TY  - JOUR
AU  - Kurešević, Lidja
AU  - Vušović, Olivera
AU  - Delić-Nikolić, Ivana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/594
AB  - Carbonate-silica veins and masses in Vučkovica locality in central Serbia, classified as Kraubath type deposit, despite their thickness, are not economically significant as magnesite deposit due to silica content well above 0.3%. What makes this mineralisation economically insignificant as magnesite deposit – heavy silification of magnesite – is what enables its use as a gemstone. The regional hydrothermal activity along deep faults of the Sava-Vardar zone of central Serbia had caused the alteration of serpentinite and formation of carbonate-silica mineralisation. Unlike other deposits of the same type in this ophiolite belt, here the depth of the erosional level provides an opportunity to explore previously unknown features of these mineralisations, such as veins' trending, dip direction, dip angle and thickness, and somewhat different relationships between carbonate and silica constituents – namely predominance of magnesite with minor content of green dolomite and chalcedony.
X-ray diffraction analyses have shown that carbonate minerals present are predominantly magnesite with minor dolomite, and that silica is fully crystallised despite its colloform structure. Energy-dispersive X-ray fluorescent (EDXRF) analysis indicated the presence of significant content of Nickel, which can cause the green colour of dolomite. Optical microscopy has shown that the precipitation process is carried out continuously between cryptocrystalline magnesite and crystalline dolomite, and that silica crystallite (fibre) size varies between cryptocrystalline and microcrystalline.
As a gemstone deposit, Vučkovica can be considered small and with complicated internal setting, but with significant depth span, as is typical for Kraubath type deposits. Present gemstone types are considered "semi-precious", of low to moderate economic value, but with very pleasing aesthetic properties.
PB  - "Goce Delčev" University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia.
T2  - Geologica Macedonica
T1  - Carbonate-silica gemstone deposit Vučkovica (central Serbia) – Geologic properties, genetic processes and deposition age.
EP  - 118
IS  - 2
SP  - 105
VL  - 36
DO  - 10.46763/GEOL22362105k
ER  - 

@article{
author = "Kurešević, Lidja and Vušović, Olivera and Delić-Nikolić, Ivana",
year = "2022",
abstract = "Carbonate-silica veins and masses in Vučkovica locality in central Serbia, classified as Kraubath type deposit, despite their thickness, are not economically significant as magnesite deposit due to silica content well above 0.3%. What makes this mineralisation economically insignificant as magnesite deposit – heavy silification of magnesite – is what enables its use as a gemstone. The regional hydrothermal activity along deep faults of the Sava-Vardar zone of central Serbia had caused the alteration of serpentinite and formation of carbonate-silica mineralisation. Unlike other deposits of the same type in this ophiolite belt, here the depth of the erosional level provides an opportunity to explore previously unknown features of these mineralisations, such as veins' trending, dip direction, dip angle and thickness, and somewhat different relationships between carbonate and silica constituents – namely predominance of magnesite with minor content of green dolomite and chalcedony.
X-ray diffraction analyses have shown that carbonate minerals present are predominantly magnesite with minor dolomite, and that silica is fully crystallised despite its colloform structure. Energy-dispersive X-ray fluorescent (EDXRF) analysis indicated the presence of significant content of Nickel, which can cause the green colour of dolomite. Optical microscopy has shown that the precipitation process is carried out continuously between cryptocrystalline magnesite and crystalline dolomite, and that silica crystallite (fibre) size varies between cryptocrystalline and microcrystalline.
As a gemstone deposit, Vučkovica can be considered small and with complicated internal setting, but with significant depth span, as is typical for Kraubath type deposits. Present gemstone types are considered "semi-precious", of low to moderate economic value, but with very pleasing aesthetic properties.",
publisher = ""Goce Delčev" University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia.",
journal = "Geologica Macedonica",
title = "Carbonate-silica gemstone deposit Vučkovica (central Serbia) – Geologic properties, genetic processes and deposition age.",
pages = "118-105",
number = "2",
volume = "36",
doi = "10.46763/GEOL22362105k"
}

Kurešević, L., Vušović, O.,& Delić-Nikolić, I.. (2022). Carbonate-silica gemstone deposit Vučkovica (central Serbia) – Geologic properties, genetic processes and deposition age.. in Geologica Macedonica
"Goce Delčev" University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia.., 36(2), 105-118.
https://doi.org/10.46763/GEOL22362105k

Kurešević L, Vušović O, Delić-Nikolić I. Carbonate-silica gemstone deposit Vučkovica (central Serbia) – Geologic properties, genetic processes and deposition age.. in Geologica Macedonica. 2022;36(2):105-118.
doi:10.46763/GEOL22362105k .

Kurešević, Lidja, Vušović, Olivera, Delić-Nikolić, Ivana, "Carbonate-silica gemstone deposit Vučkovica (central Serbia) – Geologic properties, genetic processes and deposition age." in Geologica Macedonica, 36, no. 2 (2022):105-118,
https://doi.org/10.46763/GEOL22362105k . .

TY  - JOUR
AU  - Kurešević, Lidja
AU  - Septfontaine, Michel
AU  - Vušović, Olivera
AU  - Delić-Nikolić, Ivana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/592
AB  - The Ropočevo breccia, a dimension stone highly prized in 20th century, has been examined by numerous prominent geologists of the time. It is revisited by researchers still intrigued by its perplexing provenance. Its position as a rigid exotic block of hard and completely metamorphosed carbonate breccia within the moderately lithified Upper Cretaceous flysch sequence remains unsolved due to absence of its source. Large bodies of a monomictic breccia suggest a relatively monotonous protolith carbonate sequence of significant thickness, such as those being formed in a calm marine environment with gradually sinking bottom due to epeirogenic movements. Varicoloured laminations indicate slight variations in the feeding material due to the epeirogenic oscillation of the basin bottom level. There is no regularity in clast distribution regarding size, colour or roundedness degree. This, paired with the occurrence of the "in-place brecciation" suggests a sudden fall of brecciated material due to a "catastrophic" event, such as earth-quake, collapse brecciation due to karst dissolution and a large sinkhole formation, or a graben/trench formation as in onset of the extensional processes.
PB  - Published by: "Goce Delčev" University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia
T2  - Geologica Macedonica
T1  - Contribution to geology and genetic pathway of the Ropočevo breccia – an "orphan" olistolithic body within the Upper Cretaceous flysch near Sopot (central Serbia)
EP  - 18
IS  - 1
SP  - 5
VL  - 36
DO  - 10.46763/GEOL22361005k
ER  - 

@article{
author = "Kurešević, Lidja and Septfontaine, Michel and Vušović, Olivera and Delić-Nikolić, Ivana",
year = "2022",
abstract = "The Ropočevo breccia, a dimension stone highly prized in 20th century, has been examined by numerous prominent geologists of the time. It is revisited by researchers still intrigued by its perplexing provenance. Its position as a rigid exotic block of hard and completely metamorphosed carbonate breccia within the moderately lithified Upper Cretaceous flysch sequence remains unsolved due to absence of its source. Large bodies of a monomictic breccia suggest a relatively monotonous protolith carbonate sequence of significant thickness, such as those being formed in a calm marine environment with gradually sinking bottom due to epeirogenic movements. Varicoloured laminations indicate slight variations in the feeding material due to the epeirogenic oscillation of the basin bottom level. There is no regularity in clast distribution regarding size, colour or roundedness degree. This, paired with the occurrence of the "in-place brecciation" suggests a sudden fall of brecciated material due to a "catastrophic" event, such as earth-quake, collapse brecciation due to karst dissolution and a large sinkhole formation, or a graben/trench formation as in onset of the extensional processes.",
publisher = "Published by: "Goce Delčev" University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia",
journal = "Geologica Macedonica",
title = "Contribution to geology and genetic pathway of the Ropočevo breccia – an "orphan" olistolithic body within the Upper Cretaceous flysch near Sopot (central Serbia)",
pages = "18-5",
number = "1",
volume = "36",
doi = "10.46763/GEOL22361005k"
}

Kurešević, L., Septfontaine, M., Vušović, O.,& Delić-Nikolić, I.. (2022). Contribution to geology and genetic pathway of the Ropočevo breccia – an "orphan" olistolithic body within the Upper Cretaceous flysch near Sopot (central Serbia). in Geologica Macedonica
Published by: "Goce Delčev" University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia., 36(1), 5-18.
https://doi.org/10.46763/GEOL22361005k

Kurešević L, Septfontaine M, Vušović O, Delić-Nikolić I. Contribution to geology and genetic pathway of the Ropočevo breccia – an "orphan" olistolithic body within the Upper Cretaceous flysch near Sopot (central Serbia). in Geologica Macedonica. 2022;36(1):5-18.
doi:10.46763/GEOL22361005k .

Kurešević, Lidja, Septfontaine, Michel, Vušović, Olivera, Delić-Nikolić, Ivana, "Contribution to geology and genetic pathway of the Ropočevo breccia – an "orphan" olistolithic body within the Upper Cretaceous flysch near Sopot (central Serbia)" in Geologica Macedonica, 36, no. 1 (2022):5-18,
https://doi.org/10.46763/GEOL22361005k . .

TY  - CONF
AU  - Delić-Nikolić, Ivana
AU  - Kurešević, Lidja
AU  - Vušović, Olivera
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/406
AB  - Vast masses of basic rocks are present as tectonic blocks and slices along the Eastern deep fault of the Vardar zone of Serbia. They are predominantly comprised of gabbro, with smaller part made up of diabase, and occurrences of granite, aplite and pegmatite dykes. Basic rock masses are trending along the line Kragujevac (Ždraljica)-Velika Pčelica-Bogalinac ∼8 km west of Rekovac. A significantly smaller diabase massif is present along the same tectonic line, further toward SE, at Prevešt village by Kalenicka River, approximately 13 km south of Rekovac. Drača open pit mine is situated in this diabase massif. Geologic explorative works have confirmed the reserves of 1 846 695 t of stone mass for building purposes. For over a decade, Draca mine has been producing various types of building stone, mainly graded stone aggregate with favourable physico-mechanical properties for road-construction works. Chemical analyses and petrographic study have shown typical composition and fabric for this type of rock. Main constituents are plagioclase and pyroxene, with opaque minerals as accessory and varying secondary minerals - chlorite, calcite, in some places epidote and limonite. Pyrite enrichment is visible in some areas of the massif. Chlorite, calcite, epidote and pyrite are the products of propylitic alteration. Although products of alteration are present throughout the rock mass with variable intensity, as is typical for the basic rocks of the former ocean floor sequences, petrologic properties are favourable for building stone purposes. Physico-mechanical properties of diabase have favourable values and varying scattering degrees. Dry state uniaxial compressive strength average values from seven analyses vary in the range 130-169 MPa. Resistance to abrasion average values vary in the range 9.04-17.07 cm3/50cm2. Apparent density varies within the span 2759-2926 g/cm3 and real density 2804-2951 g/cm3. Water absorption values 0.08-1.04 %. Resistance to weathering through testing of stability using Sodium-sulphate values vary from 0.00 to 0.15 % and through frost resistance from 0.00 to 0.04 %. Porosity values are almost constant at 0.8 %. In more altered parts of the rock mass, porosity reaches 1.6 %. Graded crushed aggregate has favourable values of Los Angeles coefficient 14.2 and 14.3 % for gradation B. Taking into consideration all performed tests and analyses, it is concluded that diabase from Drača mine can be used as a building stone for production of aggregate for use in concrete and for road-construction (asphalt paving mixtures for moderate, light and very light traffic load as a top wearing layer; for lower and upper bearing layers; for classic and modern road foundations); for production of crushed and hewn stone for building; crushed stone for railroad ballast. Also, it can be and is used as a raw material for production of stone wool for thermal insulation purposes.
PB  - IOP Publishing Ltd, Bristol
C3  - IOP Conference Series: Earth and Environmental Science
T1  - Diabase from Drača open pit mine in central Serbia - Quality assessment for building stone purposes
IS  - 1
VL  - 906
DO  - 10.1088/1755-1315/906/1/012013
ER  - 

@conference{
author = "Delić-Nikolić, Ivana and Kurešević, Lidja and Vušović, Olivera",
year = "2021",
abstract = "Vast masses of basic rocks are present as tectonic blocks and slices along the Eastern deep fault of the Vardar zone of Serbia. They are predominantly comprised of gabbro, with smaller part made up of diabase, and occurrences of granite, aplite and pegmatite dykes. Basic rock masses are trending along the line Kragujevac (Ždraljica)-Velika Pčelica-Bogalinac ∼8 km west of Rekovac. A significantly smaller diabase massif is present along the same tectonic line, further toward SE, at Prevešt village by Kalenicka River, approximately 13 km south of Rekovac. Drača open pit mine is situated in this diabase massif. Geologic explorative works have confirmed the reserves of 1 846 695 t of stone mass for building purposes. For over a decade, Draca mine has been producing various types of building stone, mainly graded stone aggregate with favourable physico-mechanical properties for road-construction works. Chemical analyses and petrographic study have shown typical composition and fabric for this type of rock. Main constituents are plagioclase and pyroxene, with opaque minerals as accessory and varying secondary minerals - chlorite, calcite, in some places epidote and limonite. Pyrite enrichment is visible in some areas of the massif. Chlorite, calcite, epidote and pyrite are the products of propylitic alteration. Although products of alteration are present throughout the rock mass with variable intensity, as is typical for the basic rocks of the former ocean floor sequences, petrologic properties are favourable for building stone purposes. Physico-mechanical properties of diabase have favourable values and varying scattering degrees. Dry state uniaxial compressive strength average values from seven analyses vary in the range 130-169 MPa. Resistance to abrasion average values vary in the range 9.04-17.07 cm3/50cm2. Apparent density varies within the span 2759-2926 g/cm3 and real density 2804-2951 g/cm3. Water absorption values 0.08-1.04 %. Resistance to weathering through testing of stability using Sodium-sulphate values vary from 0.00 to 0.15 % and through frost resistance from 0.00 to 0.04 %. Porosity values are almost constant at 0.8 %. In more altered parts of the rock mass, porosity reaches 1.6 %. Graded crushed aggregate has favourable values of Los Angeles coefficient 14.2 and 14.3 % for gradation B. Taking into consideration all performed tests and analyses, it is concluded that diabase from Drača mine can be used as a building stone for production of aggregate for use in concrete and for road-construction (asphalt paving mixtures for moderate, light and very light traffic load as a top wearing layer; for lower and upper bearing layers; for classic and modern road foundations); for production of crushed and hewn stone for building; crushed stone for railroad ballast. Also, it can be and is used as a raw material for production of stone wool for thermal insulation purposes.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "IOP Conference Series: Earth and Environmental Science",
title = "Diabase from Drača open pit mine in central Serbia - Quality assessment for building stone purposes",
number = "1",
volume = "906",
doi = "10.1088/1755-1315/906/1/012013"
}

Delić-Nikolić, I., Kurešević, L.,& Vušović, O.. (2021). Diabase from Drača open pit mine in central Serbia - Quality assessment for building stone purposes. in IOP Conference Series: Earth and Environmental Science
IOP Publishing Ltd, Bristol., 906(1).
https://doi.org/10.1088/1755-1315/906/1/012013

Delić-Nikolić I, Kurešević L, Vušović O. Diabase from Drača open pit mine in central Serbia - Quality assessment for building stone purposes. in IOP Conference Series: Earth and Environmental Science. 2021;906(1).
doi:10.1088/1755-1315/906/1/012013 .

Delić-Nikolić, Ivana, Kurešević, Lidja, Vušović, Olivera, "Diabase from Drača open pit mine in central Serbia - Quality assessment for building stone purposes" in IOP Conference Series: Earth and Environmental Science, 906, no. 1 (2021),
https://doi.org/10.1088/1755-1315/906/1/012013 . .

TY  - JOUR
AU  - Kurešević, Lidja
AU  - Delić-Nikolić, Ivana
AU  - Vušović, Olivera
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/205
AB  - Vulkaniti Stolova južno od Kraljeva predstavljeni su malim vulkanitskim telima dacito-andezita. Ovi vulkaniti su od otvaranja kamenoloma Kamenica pored reke Ribnice korišćeni za dobijanje kocke, agregata i ploča za oblaganje. Fizičko-mehanička svojstva ovog kamena, kao i njegov mineraloško- petrološki sastav ispitivani su u Institutu IMS iz Beograda dugi niz godina, i prikazani u ovom radu. Iako su fizičko-mehanička svojstva svežijih delova stenske mase dobra, zbog nedostatka monolitnosti, intenzivne ispucalosti, heterogenog izgleda i nepovoljnog lučenja, ovi vulkaniti nisu interesantni sa aspekta arhitektonskog građevinskog kamena, ali ispunjavaju uslove za primenu kao tehnički građevinski kamen, i upravo navedena svojstva olakšavaju njihovu eksploataciju.
AB  - Volcanic rocks of the Stolovi Mt., located to the south of Kraljevo (central Serbia) are of dacite-andesite composition, intruded as small volcanic bodies into Mesozoic serpentinites. Since the opening of Kamenica quarry on the river Ribnica, these volcanic rocks have been quarried and used for production of cubes, aggregate and small slabs. Technical properties of the stone and petrographic examinations of the rock have been performed in the Materials testing institute in Belgrade for many decades and are here presented. Technical properties of the fresh rock mass zones are satisfying the demands of Serbian standards both for dimensional and technical stone. However, the use as dimensional stone is not possible due to lack of monoliths, intense tectonic fracturing, heterogenic appearance and irregular jointing of the rock, but these characteristics facilitate their quarrying as an aggregate.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Vulkaniti Stolova kao građevinski kamen
T1  - Volcanic rocks of Mt. Stolovi as a building stone
EP  - 645
IS  - 4
SP  - 640
VL  - 68
UR  - https://hdl.handle.net/21.15107/rcub_rims_205
ER  - 

@article{
author = "Kurešević, Lidja and Delić-Nikolić, Ivana and Vušović, Olivera",
year = "2013",
abstract = "Vulkaniti Stolova južno od Kraljeva predstavljeni su malim vulkanitskim telima dacito-andezita. Ovi vulkaniti su od otvaranja kamenoloma Kamenica pored reke Ribnice korišćeni za dobijanje kocke, agregata i ploča za oblaganje. Fizičko-mehanička svojstva ovog kamena, kao i njegov mineraloško- petrološki sastav ispitivani su u Institutu IMS iz Beograda dugi niz godina, i prikazani u ovom radu. Iako su fizičko-mehanička svojstva svežijih delova stenske mase dobra, zbog nedostatka monolitnosti, intenzivne ispucalosti, heterogenog izgleda i nepovoljnog lučenja, ovi vulkaniti nisu interesantni sa aspekta arhitektonskog građevinskog kamena, ali ispunjavaju uslove za primenu kao tehnički građevinski kamen, i upravo navedena svojstva olakšavaju njihovu eksploataciju., Volcanic rocks of the Stolovi Mt., located to the south of Kraljevo (central Serbia) are of dacite-andesite composition, intruded as small volcanic bodies into Mesozoic serpentinites. Since the opening of Kamenica quarry on the river Ribnica, these volcanic rocks have been quarried and used for production of cubes, aggregate and small slabs. Technical properties of the stone and petrographic examinations of the rock have been performed in the Materials testing institute in Belgrade for many decades and are here presented. Technical properties of the fresh rock mass zones are satisfying the demands of Serbian standards both for dimensional and technical stone. However, the use as dimensional stone is not possible due to lack of monoliths, intense tectonic fracturing, heterogenic appearance and irregular jointing of the rock, but these characteristics facilitate their quarrying as an aggregate.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Vulkaniti Stolova kao građevinski kamen, Volcanic rocks of Mt. Stolovi as a building stone",
pages = "645-640",
number = "4",
volume = "68",
url = "https://hdl.handle.net/21.15107/rcub_rims_205"
}

Kurešević, L., Delić-Nikolić, I.,& Vušović, O.. (2013). Vulkaniti Stolova kao građevinski kamen. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 68(4), 640-645.
https://hdl.handle.net/21.15107/rcub_rims_205

Kurešević L, Delić-Nikolić I, Vušović O. Vulkaniti Stolova kao građevinski kamen. in Tehnika. 2013;68(4):640-645.
https://hdl.handle.net/21.15107/rcub_rims_205 .

Kurešević, Lidja, Delić-Nikolić, Ivana, Vušović, Olivera, "Vulkaniti Stolova kao građevinski kamen" in Tehnika, 68, no. 4 (2013):640-645,
https://hdl.handle.net/21.15107/rcub_rims_205 .