TY  - CONF
AU  - Zdravkov, Alexander
AU  - Bechtel, Achim
AU  - Gross, Doris
AU  - Stojanović, Ksenija
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6403
AB  - Up to fourteen sub-bituminous coal beds are hosted within the Oligocene Bobov Dol Basin.
Among them, six (numbered I to VI from base to top) are considered economically significant.
In this study, ninety samples from five of the main seams (I-V) and a locally mined sub-seam
(Ia) were characterized by maceral analysis and ash yield determination. The coal is composed
of huminite (avg. 86.6 vol.%), liptinite (avg. 17.5 vol.%) and minor inertinite (avg: 1.5 vol.%).
Maceral composition is dominated by gymnosperm-derived telohuminite (up to 72.0 vol.%)
with resinite (up to 28.0 vol.%) and exsudatinite (up to 16.0 vol.%) cell infillings, embedded in
attrinitic (avg. 21.0 vol.%) or densinitic (avg. 17.0 vol.%) groundmass. Most samples also
contain abundant leaf-derived huminte (phyllo-huminite, up to 29.0 vol.%) in association with
cutinite (up to 8.0 vol.%) and fluorinite (up to 5.0 vol.%). Low to moderate ash yields (< 25
wt.% for most samples) coupled with low to moderate values of the maceral indices, namely
TPI < 3 (for ~80% of the samples) and GI < 3 (for >53% of the samples), and low values of the
GWI < 1 (for 81% of the samples), denote organic matter deposition within an oligo- to
mesotrophic topogenous mire with (ground)watertable beneath the peat surface. Reconstruction
of paleoenvironmental settings based on maceral analysis (Fig. 1) argues for plant matter
accumulation under marginal aquatic (seam Ia) and moderately wet- to dry-forested mires
(seams I-V). Abundance of resinite and fluorinite-rich (phyllo-)huminite indicates development
of conifer-dominated forests (likely deciduous gymnosperms), perhaps within a background of
herbaceous plants and/or deciduous shrubs. The data is compatible with the previously reported
preliminary organic geochemical data for part of the seams (Zdravkov et al., 2021).
PB  - Geological Society of Greece
C3  - Joint 74th ICCP and 39th TSOP Meeting 17th – 24th September 2023, Patras, Greece
C3  - Bulletin of the Geological Society Special Publication
T1  - Reconstruction of peat-forming paleoenvironments within the Oligocene Bobov Dol Basin, SW Bulgaria: Insights from organic petrology
VL  - 12
SP  - 52
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_cherry_6403
ER  - 

@conference{
author = "Zdravkov, Alexander and Bechtel, Achim and Gross, Doris and Stojanović, Ksenija",
year = "2023",
abstract = "Up to fourteen sub-bituminous coal beds are hosted within the Oligocene Bobov Dol Basin.
Among them, six (numbered I to VI from base to top) are considered economically significant.
In this study, ninety samples from five of the main seams (I-V) and a locally mined sub-seam
(Ia) were characterized by maceral analysis and ash yield determination. The coal is composed
of huminite (avg. 86.6 vol.%), liptinite (avg. 17.5 vol.%) and minor inertinite (avg: 1.5 vol.%).
Maceral composition is dominated by gymnosperm-derived telohuminite (up to 72.0 vol.%)
with resinite (up to 28.0 vol.%) and exsudatinite (up to 16.0 vol.%) cell infillings, embedded in
attrinitic (avg. 21.0 vol.%) or densinitic (avg. 17.0 vol.%) groundmass. Most samples also
contain abundant leaf-derived huminte (phyllo-huminite, up to 29.0 vol.%) in association with
cutinite (up to 8.0 vol.%) and fluorinite (up to 5.0 vol.%). Low to moderate ash yields (< 25
wt.% for most samples) coupled with low to moderate values of the maceral indices, namely
TPI < 3 (for ~80% of the samples) and GI < 3 (for >53% of the samples), and low values of the
GWI < 1 (for 81% of the samples), denote organic matter deposition within an oligo- to
mesotrophic topogenous mire with (ground)watertable beneath the peat surface. Reconstruction
of paleoenvironmental settings based on maceral analysis (Fig. 1) argues for plant matter
accumulation under marginal aquatic (seam Ia) and moderately wet- to dry-forested mires
(seams I-V). Abundance of resinite and fluorinite-rich (phyllo-)huminite indicates development
of conifer-dominated forests (likely deciduous gymnosperms), perhaps within a background of
herbaceous plants and/or deciduous shrubs. The data is compatible with the previously reported
preliminary organic geochemical data for part of the seams (Zdravkov et al., 2021).",
publisher = "Geological Society of Greece",
journal = "Joint 74th ICCP and 39th TSOP Meeting 17th – 24th September 2023, Patras, Greece, Bulletin of the Geological Society Special Publication",
title = "Reconstruction of peat-forming paleoenvironments within the Oligocene Bobov Dol Basin, SW Bulgaria: Insights from organic petrology",
volume = "12",
pages = "52-52",
url = "https://hdl.handle.net/21.15107/rcub_cherry_6403"
}

Zdravkov, A., Bechtel, A., Gross, D.,& Stojanović, K.. (2023). Reconstruction of peat-forming paleoenvironments within the Oligocene Bobov Dol Basin, SW Bulgaria: Insights from organic petrology. in Joint 74th ICCP and 39th TSOP Meeting 17th – 24th September 2023, Patras, Greece
Geological Society of Greece., 12, 52-52.
https://hdl.handle.net/21.15107/rcub_cherry_6403

Zdravkov A, Bechtel A, Gross D, Stojanović K. Reconstruction of peat-forming paleoenvironments within the Oligocene Bobov Dol Basin, SW Bulgaria: Insights from organic petrology. in Joint 74th ICCP and 39th TSOP Meeting 17th – 24th September 2023, Patras, Greece. 2023;12:52-52.
https://hdl.handle.net/21.15107/rcub_cherry_6403 .

Zdravkov, Alexander, Bechtel, Achim, Gross, Doris, Stojanović, Ksenija, "Reconstruction of peat-forming paleoenvironments within the Oligocene Bobov Dol Basin, SW Bulgaria: Insights from organic petrology" in Joint 74th ICCP and 39th TSOP Meeting 17th – 24th September 2023, Patras, Greece, 12 (2023):52-52,
https://hdl.handle.net/21.15107/rcub_cherry_6403 .