Reconstruction of paleobotanical and paleoenvironmental changes in the Pliocene Velenje Basin, Slovenia, by molecular and stable isotope analysis of lignites

Liu, Bangjun; Vrabec, Marko; Markič, Miloš; Püttmann, Wilhelm

doi:10.1016/j.coal.2019.03.006

Cited by 23 publications

(10 citation statements)

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“…Procesi et al [75] provide an overview and the first global mapping of CO 2 and methane in sediment-hosted geothermal systems, i.e., hybrid geological systems, where volcanic and sedimentary domains interact to produce inorganic and organic gases. Biodegradation of organic matter in the Velenje basin is also related to the unexpected organoarsenic compounds found in gelified detrital lignite [46,76,77]. Concentrations of arsenic in uncontaminated soils range from 0.2 to 40 mg/kg [78], and the levels in Velenje lignite samples fall within the same range [43,76].…”

Section: Origin Of Co 2 and Evidence Of Organic Matter Degradation Mmentioning

confidence: 98%

The effect of geochemical processes on groundwater in the Velenje coal basin, Slovenia: insights from mineralogy, trace elements and isotopes signatures

et al. 2019

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This study investigated the mineralogical and isotopic composition of groundwater and precipitation to identify and constrain geochemical processes within stacked Pliocene and Triassic aquifers in the Velenje coal basin. Scanning electron microscopy combined with energy-dispersive X-ray spectroscopic analysis revealed that suspended matter in the Pliocene aquifer consists of feldspars and quartz, while dolomite, calcite and feldspars are present in the aquifer dewatering Triassic strata. The concentrations of trace elements in Triassic and Pliocene aquifers range from highest to lowest Zn > Fe > Ni > Al > Ba > Mn > B>Li > Mo > As with the majority of trace element concentrations below international drinking water health guidelines. Multivariate principal component analysis indicated that concentrations of Mn, Ba, Eu, Cs, Y, Li and T, pH, conductivity and dissolved oxygen in samples were the best chemical parameter for distinguishing the two aquifers. A significant positive correlation (p < 0.05) was found between Ni, Mn, Co, Zn, As and Mo. Groundwater in the Pliocene aquifer likely has an external source of carbon based on the δ 13 C CO2 values (− 12.3 to − 3.6‰). The groundwater also has detectable levels of dissolved methane with isotopic values (− 77.7 to − 51.4‰ δ 13 C CH4 ; − 247 to − 162‰ δ 2 H CH4) consistent with microbial methanogenesis. The groundwater in the Triassic aquifer has tritium values (up to 4.1 TU 3 H) characteristic of modern recharge (< 50 years), while the lack of detectable 3 H (0 TU) in the Pliocene aquifer is consistent with longer residence times.

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Section: Origin Of Co 2 and Evidence Of Organic Matter Degradation Mmentioning

confidence: 98%

The effect of geochemical processes on groundwater in the Velenje coal basin, Slovenia: insights from mineralogy, trace elements and isotopes signatures

et al. 2019

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“…The gymnosperms were dominated the Middle Jurassic Yan'an Formation in the northeastern Ordos Basin, mainly composed of filicopsida, ginkgopsida, and pinopsida, with rich species but high differentiation (Ge et al, 2006). Biomarkers of higher plants are widely distributed in sedimentary organic matter and can reconstruct the paleoenvironments and palaeovegetation composition (Liu et al, 2019, 2018). The higher carbon numbers of n -alkanes (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…sedimentary organic matter and can reconstruct the paleoenvironments and palaeovegetation composition (Liu et al, 2019(Liu et al, , 2018. The higher carbon numbers of n-alkanes (e.g.…”

Section: Sources Of Palaeovegetationmentioning

confidence: 99%

Biomarker signatures of the Middle Jurassic coals from the Zhangjialiang mine in Dongsheng coalfield, North China: Implications for palaeoenvironment and palaeovegetation

Zhang

Lin

Shi

et al. 2022

Energy Exploration & Exploitation

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The study on the Zhangjialiang No. 2 coal of Middle Jurassic Yan'an Formation in the northeastern Ordos Basin has been analyzed by gas chromatography-mass spectrometry (GC-MS) to determine geochemical characteristics and reconstruct palaeovegetation and palaeoclimate changes. The distribution of n-alkanes is mainly unimodal, with a medium and high molecular weight. Pr/Ph ratio (2.03–10.6) is high in most samples. The values of Tm/Ts ratio are between 1.42 and 4.92, and a predominance of C29 over C27 steranes has been found for the analyzed samples. These parameters indicate that all samples were deposited in an oxidizing freshwater environment, and the organic matter was mainly derived from terrestrial higher plants, with a small amount of aquatic organisms. Thermal maturity parameters such as C3122S/(22S + 22R) homohopane, C30αβ/(αβ + βα) hopane, together with the total organic carbon (TOC) contents (43.1% - 58.6% (except floor 2-13)) and the detected of C2717β(H)-22, 29, 30-trisnorhopane (βTm), suggest that most of samples have a relatively low maturity in the early stage. Besides, gymnosperm-derived biomarkers, including labdane, norpimarane, isopimarane, phyllocladane, abietane, rimuane, ent-beyerane, ent-kaurane, suggest that the vegetation during the Middle Jurassic Yan’an Formation was characterized by conifers.

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“…10). Furthermore, higher δ 13 C values in studied lignite samples indicate that most of the gymnosperm flora (resulting in xylite-rich lithotype) participated in peat formation compared to angiosperms (Bechtel et al 2003b;Liu et al 2019;Đoković et al 2018b). (Cerling et al 1993;Blackburn and Sluiter 1994).…”

Section: Influence Of Macroscopic Constituents On δ 13 C Of Lignitesmentioning

confidence: 94%

Paleoenvironmental, paleovegetational, and paleoclimatic changes during Paleogene lignite formation in Rajasthan, India

et al. 2021

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This study provides detailed information about the geochemistry and coal petrography of Paleogene lignite deposits of Bikaner-Nagaur Basin and the Barmer Basin of Rajasthan, India, which have been used to reconstruct paleoclimatic, paleovegetational, and paleodepositional conditions. Petrographic characteristics show the dominance of huminite group macerals followed by inertinite and liptinite group macerals in Rajasthan lignites. The mean random huminite reflectance value (%Ro m ) ranges from 0.27 to 0.33%, which put these lignites as low-rank lignite 'B'. 13C NMR spectra show sharp peaks in the aliphatic region, indicting immaturity of organic matter. These peaks confirm the presence of aliphatic CH 2 , aliphatic -CH 3 bonding, protonated aromatic carbons, and oxygenated aromatic carbon atoms (Ar-O). δ 13 C values in xylite-rich lithotype range from − 25.04 to − 25.61‰, indicating the contribution of gymnosperm plants (Taxodiaceae during) in peat. Whereas, δ 13 C in matrix-rich lithotype range from − 26.82 to − 27.44‰, and show the presence of angiosperm taxa (Typhaceae, Iridaceae, and Gramineae) during peat formation in the study area. The samples dominated by huminite group macerals have a slightly low δ 13 C value than inertinite-rich samples. In contrast, the least δ 13 C value has been recorded in the liptinite rich samples. δ 13 C values also suggest C 3 plants to be the main peat-forming vegetation in the study area during the Paleogene. The mineralogical study indicates peat formation in semi-arid to slightly arid climatic conditions. The presence of framboidal pyrite, alginite, funginite macerals, and high sulfur content of the studied lignites indicate marine incursion in the basin.

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Reconstruction of paleobotanical and paleoenvironmental changes in the Pliocene Velenje Basin, Slovenia, by molecular and stable isotope analysis of lignites

Cited by 23 publications

References 116 publications

The effect of geochemical processes on groundwater in the Velenje coal basin, Slovenia: insights from mineralogy, trace elements and isotopes signatures

The effect of geochemical processes on groundwater in the Velenje coal basin, Slovenia: insights from mineralogy, trace elements and isotopes signatures

Biomarker signatures of the Middle Jurassic coals from the Zhangjialiang mine in Dongsheng coalfield, North China: Implications for palaeoenvironment and palaeovegetation

Paleoenvironmental, paleovegetational, and paleoclimatic changes during Paleogene lignite formation in Rajasthan, India

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