TY  - CONF
AU  - Stevanović, Jelena
AU  - Vuković, Nikola
AU  - Gross, Doris
AU  - Sachsenhofer, Reinhard
AU  - Kostić, Aleksandar
AU  - Kojić, Ivan
AU  - Stojanović, Ksenija
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6400
AB  - In the last two decades, the Turija oil field (SE Pannonian Basin, Serbia) has attracted attention through oil discoveries in new wells. The source rocks of the Turija oil are still unknown. In this study, potential lower Miocene (Ottnangian-Karpatian) to upper Miocene (Pannonian) source rocks from some boreholes near the Turija oil field were investigated to determine the origin, depositional environment, hydrocarbon potential and maturity of organic matter (OM). The Rock-Eval method, biomarker and carbon isotope analyses were used. The obtained results indicate a mixed aquatic-terrestrial (Ottnangian-Karpatian and Badenian) and predominantly aquatic (Badenian and Pannonian) origin of OM, deposited under variable, reducing to oxic conditions. The majority of studied samples show a good oil generation potential. Numerous maturity indicators imply that maturity of OM varies from immature to mature. The large heterogeneity (facies and maturity) of the Badenian samples is consistent with remarkable environmental changes caused by the uplift of the Alps and Carpathians in the middle to late Badenian.
PB  - European Association of Geoscientists and Engineers
C3  - 31st International Meeting on Organic Geochemistry
T1  - Search for the Source Rocks in the Turija Oil Field Region (Se Pannonian Basin, Serbia)
SP  - 175
EP  - 175
DO  - 10.3997/2214-4609.202333175
ER  - 

@conference{
author = "Stevanović, Jelena and Vuković, Nikola and Gross, Doris and Sachsenhofer, Reinhard and Kostić, Aleksandar and Kojić, Ivan and Stojanović, Ksenija",
year = "2023",
abstract = "In the last two decades, the Turija oil field (SE Pannonian Basin, Serbia) has attracted attention through oil discoveries in new wells. The source rocks of the Turija oil are still unknown. In this study, potential lower Miocene (Ottnangian-Karpatian) to upper Miocene (Pannonian) source rocks from some boreholes near the Turija oil field were investigated to determine the origin, depositional environment, hydrocarbon potential and maturity of organic matter (OM). The Rock-Eval method, biomarker and carbon isotope analyses were used. The obtained results indicate a mixed aquatic-terrestrial (Ottnangian-Karpatian and Badenian) and predominantly aquatic (Badenian and Pannonian) origin of OM, deposited under variable, reducing to oxic conditions. The majority of studied samples show a good oil generation potential. Numerous maturity indicators imply that maturity of OM varies from immature to mature. The large heterogeneity (facies and maturity) of the Badenian samples is consistent with remarkable environmental changes caused by the uplift of the Alps and Carpathians in the middle to late Badenian.",
publisher = "European Association of Geoscientists and Engineers",
journal = "31st International Meeting on Organic Geochemistry",
title = "Search for the Source Rocks in the Turija Oil Field Region (Se Pannonian Basin, Serbia)",
pages = "175-175",
doi = "10.3997/2214-4609.202333175"
}

Stevanović, J., Vuković, N., Gross, D., Sachsenhofer, R., Kostić, A., Kojić, I.,& Stojanović, K.. (2023). Search for the Source Rocks in the Turija Oil Field Region (Se Pannonian Basin, Serbia). in 31st International Meeting on Organic Geochemistry
European Association of Geoscientists and Engineers., 175-175.
https://doi.org/10.3997/2214-4609.202333175

Stevanović J, Vuković N, Gross D, Sachsenhofer R, Kostić A, Kojić I, Stojanović K. Search for the Source Rocks in the Turija Oil Field Region (Se Pannonian Basin, Serbia). in 31st International Meeting on Organic Geochemistry. 2023;:175-175.
doi:10.3997/2214-4609.202333175 .

Stevanović, Jelena, Vuković, Nikola, Gross, Doris, Sachsenhofer, Reinhard, Kostić, Aleksandar, Kojić, Ivan, Stojanović, Ksenija, "Search for the Source Rocks in the Turija Oil Field Region (Se Pannonian Basin, Serbia)" in 31st International Meeting on Organic Geochemistry (2023):175-175,
https://doi.org/10.3997/2214-4609.202333175 . .

TY  - CONF
AU  - Kus, Jolanta
AU  - Dolezych, Martina
AU  - Schneider, Wilfrid
AU  - Hower, James
AU  - Hofmann, Tamás
AU  - Visiné Rajczi, Eszter
AU  - Sachsenhofer, Reinhard
AU  - Bechtel, Achim
AU  - Stojanović, Ksenija
AU  - Životić, Dragana
AU  - Kojić, Ivan
AU  - Mastalerz, Maria
AU  - Graupner, Torsten
AU  - Lukens, William
AU  - Donaldson, Lloyd
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6401
AB  - Fossil wood with well-preserved cellulose is detected in open-cast mines of the Miocene Lusatia lignite-mining district (eastern Germany). Aimed to explain the preservation of cellulose, an organic geochemical study was performed on the fossil wood samples and intact heartwood tissues of the respective modern woody species. The results of micro Fourier transform infrared (micro-FTIR) spectroscopy, biomarker distributions and δ13C values indicate that the preservation of cellulose in fossil wood samples was governed by reducing conditions. Furthermore, it can be also attributed to weathering of the surrounding tuff- and rhyolite-dominated acidic volcanic rock that might have caused lowering of pH. All fossil wood samples contain minor hopanoids, implying negligible post-depositional microbial degradation of OM. Limited microbial degradation of OM could be also caused by protection of the wood by conifer resins. For example, fossil Cupressaceae sensu lato, as confirmed by detection of hibaene, totarane, and cuparene, was more resinous than the modern forms. The absence of perylene in fossil wood indicates the limited degradation of wood by fungi.
PB  - European Association of Geoscientists and Engineers
C3  - 31st International Meeting on Organic Geochemistry
T1  - The Preservation of Cellulose in Fossil Wood – Implications from Organic Geochemical Study of Fossil and Modern Wood
SP  - 109
EP  - 109
DO  - 10.3997/2214-4609.202333109
ER  - 

@conference{
author = "Kus, Jolanta and Dolezych, Martina and Schneider, Wilfrid and Hower, James and Hofmann, Tamás and Visiné Rajczi, Eszter and Sachsenhofer, Reinhard and Bechtel, Achim and Stojanović, Ksenija and Životić, Dragana and Kojić, Ivan and Mastalerz, Maria and Graupner, Torsten and Lukens, William and Donaldson, Lloyd",
year = "2023",
abstract = "Fossil wood with well-preserved cellulose is detected in open-cast mines of the Miocene Lusatia lignite-mining district (eastern Germany). Aimed to explain the preservation of cellulose, an organic geochemical study was performed on the fossil wood samples and intact heartwood tissues of the respective modern woody species. The results of micro Fourier transform infrared (micro-FTIR) spectroscopy, biomarker distributions and δ13C values indicate that the preservation of cellulose in fossil wood samples was governed by reducing conditions. Furthermore, it can be also attributed to weathering of the surrounding tuff- and rhyolite-dominated acidic volcanic rock that might have caused lowering of pH. All fossil wood samples contain minor hopanoids, implying negligible post-depositional microbial degradation of OM. Limited microbial degradation of OM could be also caused by protection of the wood by conifer resins. For example, fossil Cupressaceae sensu lato, as confirmed by detection of hibaene, totarane, and cuparene, was more resinous than the modern forms. The absence of perylene in fossil wood indicates the limited degradation of wood by fungi.",
publisher = "European Association of Geoscientists and Engineers",
journal = "31st International Meeting on Organic Geochemistry",
title = "The Preservation of Cellulose in Fossil Wood – Implications from Organic Geochemical Study of Fossil and Modern Wood",
pages = "109-109",
doi = "10.3997/2214-4609.202333109"
}

Kus, J., Dolezych, M., Schneider, W., Hower, J., Hofmann, T., Visiné Rajczi, E., Sachsenhofer, R., Bechtel, A., Stojanović, K., Životić, D., Kojić, I., Mastalerz, M., Graupner, T., Lukens, W.,& Donaldson, L.. (2023). The Preservation of Cellulose in Fossil Wood – Implications from Organic Geochemical Study of Fossil and Modern Wood. in 31st International Meeting on Organic Geochemistry
European Association of Geoscientists and Engineers., 109-109.
https://doi.org/10.3997/2214-4609.202333109

Kus J, Dolezych M, Schneider W, Hower J, Hofmann T, Visiné Rajczi E, Sachsenhofer R, Bechtel A, Stojanović K, Životić D, Kojić I, Mastalerz M, Graupner T, Lukens W, Donaldson L. The Preservation of Cellulose in Fossil Wood – Implications from Organic Geochemical Study of Fossil and Modern Wood. in 31st International Meeting on Organic Geochemistry. 2023;:109-109.
doi:10.3997/2214-4609.202333109 .

Kus, Jolanta, Dolezych, Martina, Schneider, Wilfrid, Hower, James, Hofmann, Tamás, Visiné Rajczi, Eszter, Sachsenhofer, Reinhard, Bechtel, Achim, Stojanović, Ksenija, Životić, Dragana, Kojić, Ivan, Mastalerz, Maria, Graupner, Torsten, Lukens, William, Donaldson, Lloyd, "The Preservation of Cellulose in Fossil Wood – Implications from Organic Geochemical Study of Fossil and Modern Wood" in 31st International Meeting on Organic Geochemistry (2023):109-109,
https://doi.org/10.3997/2214-4609.202333109 . .

TY  - JOUR
AU  - Bechtel, Achim
AU  - Oberauer, Klaus
AU  - Kostić, Aleksandar Ž.
AU  - Gratzer, Reinhard
AU  - Milisavljević, Vladimir
AU  - Aleksić, Nikoleta
AU  - Stojanović, Ksenija A.
AU  - Gross, Doris
AU  - Sachsenhofer, Reinhard F.
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2573
AB  - The most prolific oil shale deposit in Serbia is located in the Aleksinac Basin and is assigned to the Lower Miocene. Depositional environments and hydrocarbon potential were assessed for the Aleksinac oil shale and coal layers through bulk geochemical, organic petrographical, biomarker, and carbon isotope data from core samples from a single well. Maturity parameters (vitrinite reflectance, T-max, biomarker isomerisation ratios) prove that the organic matter (OM) is immature. A lower lacustrine oil shale sequence is comprised of alternating sandstone and clay-rich rocks and some thin coal beds, indicating strong variations in depositional environment. This stratum is covered with thick sandstone (50 m) terminated by the main 4 m thick coal seam that was deposited in a low-lying mire, as evidenced by high total sulfur and mineral matrix contents. The plant input was dominated by angiosperms. A relative rise in water level led to the drowning of the swamp and to the deposition of a 60 m thick upper oil shale in a lacustrine environment. The OM of the oil shale is dominated by kerogen Type I (lamalginite). Biomarker data suggest a stratified water column that likely formed due to differences in salinity. The stratified water column led to a strictly anoxic environment and photic zone euxinia in a mesosalinar, hydrologically closed lake, which enabled the accumulation of uncommonly high amounts of organic material (average TOC: 18.0 wt%) with excellent preservation (average HI: 743 mg HC/g TOC). (c) 2017 Elsevier Ltd. All rights reserved.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Organic Geochemistry
T1  - Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)
VL  - 115
SP  - 93
EP  - 112
DO  - 10.1016/j.orggeochem.2017.10.009
ER  - 

@article{
author = "Bechtel, Achim and Oberauer, Klaus and Kostić, Aleksandar Ž. and Gratzer, Reinhard and Milisavljević, Vladimir and Aleksić, Nikoleta and Stojanović, Ksenija A. and Gross, Doris and Sachsenhofer, Reinhard F.",
year = "2018",
abstract = "The most prolific oil shale deposit in Serbia is located in the Aleksinac Basin and is assigned to the Lower Miocene. Depositional environments and hydrocarbon potential were assessed for the Aleksinac oil shale and coal layers through bulk geochemical, organic petrographical, biomarker, and carbon isotope data from core samples from a single well. Maturity parameters (vitrinite reflectance, T-max, biomarker isomerisation ratios) prove that the organic matter (OM) is immature. A lower lacustrine oil shale sequence is comprised of alternating sandstone and clay-rich rocks and some thin coal beds, indicating strong variations in depositional environment. This stratum is covered with thick sandstone (50 m) terminated by the main 4 m thick coal seam that was deposited in a low-lying mire, as evidenced by high total sulfur and mineral matrix contents. The plant input was dominated by angiosperms. A relative rise in water level led to the drowning of the swamp and to the deposition of a 60 m thick upper oil shale in a lacustrine environment. The OM of the oil shale is dominated by kerogen Type I (lamalginite). Biomarker data suggest a stratified water column that likely formed due to differences in salinity. The stratified water column led to a strictly anoxic environment and photic zone euxinia in a mesosalinar, hydrologically closed lake, which enabled the accumulation of uncommonly high amounts of organic material (average TOC: 18.0 wt%) with excellent preservation (average HI: 743 mg HC/g TOC). (c) 2017 Elsevier Ltd. All rights reserved.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Organic Geochemistry",
title = "Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)",
volume = "115",
pages = "93-112",
doi = "10.1016/j.orggeochem.2017.10.009"
}

Bechtel, A., Oberauer, K., Kostić, A. Ž., Gratzer, R., Milisavljević, V., Aleksić, N., Stojanović, K. A., Gross, D.,& Sachsenhofer, R. F.. (2018). Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia). in Organic Geochemistry
Pergamon-Elsevier Science Ltd, Oxford., 115, 93-112.
https://doi.org/10.1016/j.orggeochem.2017.10.009

Bechtel A, Oberauer K, Kostić AŽ, Gratzer R, Milisavljević V, Aleksić N, Stojanović KA, Gross D, Sachsenhofer RF. Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia). in Organic Geochemistry. 2018;115:93-112.
doi:10.1016/j.orggeochem.2017.10.009 .

Bechtel, Achim, Oberauer, Klaus, Kostić, Aleksandar Ž., Gratzer, Reinhard, Milisavljević, Vladimir, Aleksić, Nikoleta, Stojanović, Ksenija A., Gross, Doris, Sachsenhofer, Reinhard F., "Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)" in Organic Geochemistry, 115 (2018):93-112,
https://doi.org/10.1016/j.orggeochem.2017.10.009 . .

TY  - JOUR
AU  - Bechtel, Achim
AU  - Oberauer, Klaus
AU  - Kostić, Aleksandar Ž.
AU  - Gratzer, Reinhard
AU  - Milisavljević, Vladimir
AU  - Aleksić, Nikoleta
AU  - Stojanović, Ksenija A.
AU  - Gross, Doris
AU  - Sachsenhofer, Reinhard F.
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3031
AB  - The most prolific oil shale deposit in Serbia is located in the Aleksinac Basin and is assigned to the Lower Miocene. Depositional environments and hydrocarbon potential were assessed for the Aleksinac oil shale and coal layers through bulk geochemical, organic petrographical, biomarker, and carbon isotope data from core samples from a single well. Maturity parameters (vitrinite reflectance, T-max, biomarker isomerisation ratios) prove that the organic matter (OM) is immature. A lower lacustrine oil shale sequence is comprised of alternating sandstone and clay-rich rocks and some thin coal beds, indicating strong variations in depositional environment. This stratum is covered with thick sandstone (50 m) terminated by the main 4 m thick coal seam that was deposited in a low-lying mire, as evidenced by high total sulfur and mineral matrix contents. The plant input was dominated by angiosperms. A relative rise in water level led to the drowning of the swamp and to the deposition of a 60 m thick upper oil shale in a lacustrine environment. The OM of the oil shale is dominated by kerogen Type I (lamalginite). Biomarker data suggest a stratified water column that likely formed due to differences in salinity. The stratified water column led to a strictly anoxic environment and photic zone euxinia in a mesosalinar, hydrologically closed lake, which enabled the accumulation of uncommonly high amounts of organic material (average TOC: 18.0 wt%) with excellent preservation (average HI: 743 mg HC/g TOC). (c) 2017 Elsevier Ltd. All rights reserved.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Organic Geochemistry
T1  - Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)
VL  - 115
SP  - 93
EP  - 112
DO  - 10.1016/j.orggeochem.2017.10.009
ER  - 

@article{
author = "Bechtel, Achim and Oberauer, Klaus and Kostić, Aleksandar Ž. and Gratzer, Reinhard and Milisavljević, Vladimir and Aleksić, Nikoleta and Stojanović, Ksenija A. and Gross, Doris and Sachsenhofer, Reinhard F.",
year = "2018",
abstract = "The most prolific oil shale deposit in Serbia is located in the Aleksinac Basin and is assigned to the Lower Miocene. Depositional environments and hydrocarbon potential were assessed for the Aleksinac oil shale and coal layers through bulk geochemical, organic petrographical, biomarker, and carbon isotope data from core samples from a single well. Maturity parameters (vitrinite reflectance, T-max, biomarker isomerisation ratios) prove that the organic matter (OM) is immature. A lower lacustrine oil shale sequence is comprised of alternating sandstone and clay-rich rocks and some thin coal beds, indicating strong variations in depositional environment. This stratum is covered with thick sandstone (50 m) terminated by the main 4 m thick coal seam that was deposited in a low-lying mire, as evidenced by high total sulfur and mineral matrix contents. The plant input was dominated by angiosperms. A relative rise in water level led to the drowning of the swamp and to the deposition of a 60 m thick upper oil shale in a lacustrine environment. The OM of the oil shale is dominated by kerogen Type I (lamalginite). Biomarker data suggest a stratified water column that likely formed due to differences in salinity. The stratified water column led to a strictly anoxic environment and photic zone euxinia in a mesosalinar, hydrologically closed lake, which enabled the accumulation of uncommonly high amounts of organic material (average TOC: 18.0 wt%) with excellent preservation (average HI: 743 mg HC/g TOC). (c) 2017 Elsevier Ltd. All rights reserved.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Organic Geochemistry",
title = "Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)",
volume = "115",
pages = "93-112",
doi = "10.1016/j.orggeochem.2017.10.009"
}

Bechtel, A., Oberauer, K., Kostić, A. Ž., Gratzer, R., Milisavljević, V., Aleksić, N., Stojanović, K. A., Gross, D.,& Sachsenhofer, R. F.. (2018). Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia). in Organic Geochemistry
Pergamon-Elsevier Science Ltd, Oxford., 115, 93-112.
https://doi.org/10.1016/j.orggeochem.2017.10.009

Bechtel A, Oberauer K, Kostić AŽ, Gratzer R, Milisavljević V, Aleksić N, Stojanović KA, Gross D, Sachsenhofer RF. Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia). in Organic Geochemistry. 2018;115:93-112.
doi:10.1016/j.orggeochem.2017.10.009 .

Bechtel, Achim, Oberauer, Klaus, Kostić, Aleksandar Ž., Gratzer, Reinhard, Milisavljević, Vladimir, Aleksić, Nikoleta, Stojanović, Ksenija A., Gross, Doris, Sachsenhofer, Reinhard F., "Depositional environment and hydrocarbon source potential of the Lower Miocene oil shale deposit in the Aleksinac Basin (Serbia)" in Organic Geochemistry, 115 (2018):93-112,
https://doi.org/10.1016/j.orggeochem.2017.10.009 . .

TY  - JOUR
AU  - Đoković, Nataša
AU  - Mitrović, Danica D.
AU  - Životić, Dragana R.
AU  - Bechtel, Achim
AU  - Sachsenhofer, Reinhard F.
AU  - Stojanović, Ksenija A.
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2077
AB  - The maceral and biomarker characteristics of 4 sublithotypes of xylite-rich coal (SXCs), pale yellow, dark yellow, brown and black, originating from the Kolubara and Kostolac lignite basins were determined. Based on these results, differences in sources and changes of organic matter (OM) resulting in formation of 4 SXCs were established. Conifers (particularly Cupressaceae, Taxodiaceae and Pinacea) had a significant impact on the precursor OM of all SXCs. The contribution of gymnosperm vs. angiosperm vegetation decreased in order pale yellow SXC  gt  dark yellow SXC  gt  brown SXC  gt  black SXC. The distribution of non-hopanoid triterpenoids indicates that change of SXC colour from -yellow to black is associated with reduced input of angiosperm plants from the Betulacea family. Differences in hopane distribution, bitumen content, proportion of short-chain n-alkanes and degree of aromatization of di-and triterpenoids of pale yellow SXC are controlled by microbial communities which took part in the diagenetic alteration of OM. The content of total huminites increased from black to pale yellow SXC, whereas contents of total liptinite and inertinite macerals showed the opposite trend. SXCs differ according to textinite/ulminite ratio, which sharply decreased from pale yellow to black SXC, reflecting increase in gelification of woody tissue. Regarding the composition of liptinite macerals, the SXCs mostly differ according to resinite/liptodetrinite and resinite/suberinite ratios, which are higher in yellow than in brown and black SXC. This result along with values of TOC/N ratio and Carbon Preference Index indicate that the contribution of well preserved woody material, including lignin tissue vs. the impact of epicuticular waxes decreased from yellow to black SXC.
PB  - Slovak Acad Sciences Geological  Inst, Bratislava
T2  - Geologica Carpathica
T1  - Petrographic and biomarker analysis of xylite-rich coal from the Kolubara and Kostolac lignite basins (Pannonian Basin, Serbia)
VL  - 69
IS  - 1
SP  - 51
EP  - 70
DO  - 10.1515/geoca-2018-0004
ER  - 

@article{
author = "Đoković, Nataša and Mitrović, Danica D. and Životić, Dragana R. and Bechtel, Achim and Sachsenhofer, Reinhard F. and Stojanović, Ksenija A.",
year = "2018",
abstract = "The maceral and biomarker characteristics of 4 sublithotypes of xylite-rich coal (SXCs), pale yellow, dark yellow, brown and black, originating from the Kolubara and Kostolac lignite basins were determined. Based on these results, differences in sources and changes of organic matter (OM) resulting in formation of 4 SXCs were established. Conifers (particularly Cupressaceae, Taxodiaceae and Pinacea) had a significant impact on the precursor OM of all SXCs. The contribution of gymnosperm vs. angiosperm vegetation decreased in order pale yellow SXC  gt  dark yellow SXC  gt  brown SXC  gt  black SXC. The distribution of non-hopanoid triterpenoids indicates that change of SXC colour from -yellow to black is associated with reduced input of angiosperm plants from the Betulacea family. Differences in hopane distribution, bitumen content, proportion of short-chain n-alkanes and degree of aromatization of di-and triterpenoids of pale yellow SXC are controlled by microbial communities which took part in the diagenetic alteration of OM. The content of total huminites increased from black to pale yellow SXC, whereas contents of total liptinite and inertinite macerals showed the opposite trend. SXCs differ according to textinite/ulminite ratio, which sharply decreased from pale yellow to black SXC, reflecting increase in gelification of woody tissue. Regarding the composition of liptinite macerals, the SXCs mostly differ according to resinite/liptodetrinite and resinite/suberinite ratios, which are higher in yellow than in brown and black SXC. This result along with values of TOC/N ratio and Carbon Preference Index indicate that the contribution of well preserved woody material, including lignin tissue vs. the impact of epicuticular waxes decreased from yellow to black SXC.",
publisher = "Slovak Acad Sciences Geological  Inst, Bratislava",
journal = "Geologica Carpathica",
title = "Petrographic and biomarker analysis of xylite-rich coal from the Kolubara and Kostolac lignite basins (Pannonian Basin, Serbia)",
volume = "69",
number = "1",
pages = "51-70",
doi = "10.1515/geoca-2018-0004"
}

Đoković, N., Mitrović, D. D., Životić, D. R., Bechtel, A., Sachsenhofer, R. F.,& Stojanović, K. A.. (2018). Petrographic and biomarker analysis of xylite-rich coal from the Kolubara and Kostolac lignite basins (Pannonian Basin, Serbia). in Geologica Carpathica
Slovak Acad Sciences Geological  Inst, Bratislava., 69(1), 51-70.
https://doi.org/10.1515/geoca-2018-0004

Đoković N, Mitrović DD, Životić DR, Bechtel A, Sachsenhofer RF, Stojanović KA. Petrographic and biomarker analysis of xylite-rich coal from the Kolubara and Kostolac lignite basins (Pannonian Basin, Serbia). in Geologica Carpathica. 2018;69(1):51-70.
doi:10.1515/geoca-2018-0004 .

Đoković, Nataša, Mitrović, Danica D., Životić, Dragana R., Bechtel, Achim, Sachsenhofer, Reinhard F., Stojanović, Ksenija A., "Petrographic and biomarker analysis of xylite-rich coal from the Kolubara and Kostolac lignite basins (Pannonian Basin, Serbia)" in Geologica Carpathica, 69, no. 1 (2018):51-70,
https://doi.org/10.1515/geoca-2018-0004 . .

TY  - JOUR
AU  - Đoković, Nataša
AU  - Mitrović, Danica D.
AU  - Životić, Dragana R.
AU  - Bechtel, Achim
AU  - Sachsenhofer, Reinhard F.
AU  - Matic, Vesna
AU  - Glamocanin, Lidija
AU  - Stojanović, Ksenija A.
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2195
AB  - Three Upper Miocene (Pontian) lignite seams are present in the Smederevsko Pomoravlje field (Kostolac Basin, Serbia). The origin of their organic matter (OM), the characteristics of the depositional environment and certain utilisation properties have been evaluated based on petrographic data, bulk organic geochemical parameters, biomarker patterns and their isotope signatures. Moreover, results of isotopic analysis were used for the investigation of the influence of diagenetic aromatisation on delta C-13 signatures of biomarkers. The studied lignites are typical humic coals. The OM of lignites is derived from woody vegetation and herbaceous peat-forming plants, with a strong prevalence of the former. The peat-forming vegetation is dominated by decay resistant conifers, including gymnosperm families Cupressaceae, Taxodiaceae, and Pinaceae. Angiosperms occurred in lower amounts. Minor contribution of ferns, fungi and emergent aquatic macrophyta to the biomass is also evident. Chemoautotrophic- and heterotrophic bacteria played an import role during diagenesis. Diagenetic alterations, associated with change in the number of carbon atoms, influence delta C-13 ratios. Diagenetic aromatisation of di- and non-hopanoid triterpenoids is accompanied with C-13 depletion, whereas aromatisation of hopanoids displays the opposite trend. Peatification proceeded in a fresh water environment under variable, anoxic to slightly oxic redox conditions. The lowermost coal seam III accumulated in a topogenous fresh water peat mire with open water areas, which changed occasionally into a wet forest swamp. This resulted in the deposition of mineral-rich coal. The characteristics of lignite in coal seam II are similar to those of coal seam III. This is supported also by generally similar delta C-13 values of individual biomarkers. Coal seam I is dominated by xylite-rich coal, formed under mesotrophic to ombrotrophic conditions. Rapid flooding of the bogs stopped peat growth in all three coal seams. The ratios of ring-A-degraded and non-degraded aromatic diterpenoids and non-hopanoid triterpenoids, proposed in this study, as well as degree of aromatisation of these biomarkers, reflect changes in the water table. Calorific values of the samples indicate that they meet basic requirements for utilisation in the thermal power plants. None of the lignite samples is suitable for coal briquetting, whereas, based on petrographic data, lignite from coal seam I possesses certain potential for fluidized bed gasification.
PB  - Elsevier Science Bv, Amsterdam
T2  - International Journal of Coal Geology
T1  - Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia)
VL  - 195
SP  - 139
EP  - 171
DO  - 10.1016/j.coal.2018.06.005
ER  - 

@article{
author = "Đoković, Nataša and Mitrović, Danica D. and Životić, Dragana R. and Bechtel, Achim and Sachsenhofer, Reinhard F. and Matic, Vesna and Glamocanin, Lidija and Stojanović, Ksenija A.",
year = "2018",
abstract = "Three Upper Miocene (Pontian) lignite seams are present in the Smederevsko Pomoravlje field (Kostolac Basin, Serbia). The origin of their organic matter (OM), the characteristics of the depositional environment and certain utilisation properties have been evaluated based on petrographic data, bulk organic geochemical parameters, biomarker patterns and their isotope signatures. Moreover, results of isotopic analysis were used for the investigation of the influence of diagenetic aromatisation on delta C-13 signatures of biomarkers. The studied lignites are typical humic coals. The OM of lignites is derived from woody vegetation and herbaceous peat-forming plants, with a strong prevalence of the former. The peat-forming vegetation is dominated by decay resistant conifers, including gymnosperm families Cupressaceae, Taxodiaceae, and Pinaceae. Angiosperms occurred in lower amounts. Minor contribution of ferns, fungi and emergent aquatic macrophyta to the biomass is also evident. Chemoautotrophic- and heterotrophic bacteria played an import role during diagenesis. Diagenetic alterations, associated with change in the number of carbon atoms, influence delta C-13 ratios. Diagenetic aromatisation of di- and non-hopanoid triterpenoids is accompanied with C-13 depletion, whereas aromatisation of hopanoids displays the opposite trend. Peatification proceeded in a fresh water environment under variable, anoxic to slightly oxic redox conditions. The lowermost coal seam III accumulated in a topogenous fresh water peat mire with open water areas, which changed occasionally into a wet forest swamp. This resulted in the deposition of mineral-rich coal. The characteristics of lignite in coal seam II are similar to those of coal seam III. This is supported also by generally similar delta C-13 values of individual biomarkers. Coal seam I is dominated by xylite-rich coal, formed under mesotrophic to ombrotrophic conditions. Rapid flooding of the bogs stopped peat growth in all three coal seams. The ratios of ring-A-degraded and non-degraded aromatic diterpenoids and non-hopanoid triterpenoids, proposed in this study, as well as degree of aromatisation of these biomarkers, reflect changes in the water table. Calorific values of the samples indicate that they meet basic requirements for utilisation in the thermal power plants. None of the lignite samples is suitable for coal briquetting, whereas, based on petrographic data, lignite from coal seam I possesses certain potential for fluidized bed gasification.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "International Journal of Coal Geology",
title = "Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia)",
volume = "195",
pages = "139-171",
doi = "10.1016/j.coal.2018.06.005"
}

Đoković, N., Mitrović, D. D., Životić, D. R., Bechtel, A., Sachsenhofer, R. F., Matic, V., Glamocanin, L.,& Stojanović, K. A.. (2018). Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia). in International Journal of Coal Geology
Elsevier Science Bv, Amsterdam., 195, 139-171.
https://doi.org/10.1016/j.coal.2018.06.005

Đoković N, Mitrović DD, Životić DR, Bechtel A, Sachsenhofer RF, Matic V, Glamocanin L, Stojanović KA. Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia). in International Journal of Coal Geology. 2018;195:139-171.
doi:10.1016/j.coal.2018.06.005 .

Đoković, Nataša, Mitrović, Danica D., Životić, Dragana R., Bechtel, Achim, Sachsenhofer, Reinhard F., Matic, Vesna, Glamocanin, Lidija, Stojanović, Ksenija A., "Petrographical and organic geochemical study of the lignite from the Smederevsko Pomoravlje field (Kostolac Basin, Serbia)" in International Journal of Coal Geology, 195 (2018):139-171,
https://doi.org/10.1016/j.coal.2018.06.005 . .