Szczerba Marek

Szczerba Marek
Polish Academy of Sciences | PAN · Institute of Geological Sciences

PhD

About

45
Publications
11,482
Reads
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554
Citations
Citations since 2017
30 Research Items
426 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Additional affiliations
January 2007 - present
Polish Academy of Sciences
Position
  • Researcher

Publications

Publications (45)
Article
Numerous experiments have verified that smectites can adsorb aflatoxin B1 (AfB1) effectively and the efficiency of this process depends heavily on the chemical, physical, and mineralogical characteristics of the smectite. Several relationships between these characteristics and AfB1 sorption have been determined experimentally, but the molecular mec...
Article
The Oligocene Menilite Beds are considered the most important source rock for hydrocarbon accumulation in the Polish Carpathian region, whereas the Cretaceous Lgota Beds have been regarded as an additional potential source rock. Understanding their petrophysical and geochemical properties is essential for evaluating the hydrocarbon potential of the...
Article
Full-text available
Pyroclastic horizons are common in the middle–upper Famennian carbonate and siliceous successions located near the Rhenohercynian margins of Laurussia and the Variscian Saxothuringian oceanic realm. We present a detailed geochronological, geochemical and mineralogical study of tuffites from three sites in southern Poland: Holy Cross Mountains (Kowa...
Article
Extraction of meaningful information on the timing of fault activity from clay gouges using radiometric dating methods, such as those based on the K-Ar system, can be challenging. One of the factors complicating interpretation of the radiometric dating results is the presence of multiple K-bearing components in the gouge material. In the current st...
Article
The selective self-assembly of small molecules in the interlayer of kaolinite is a fundamentally important and technologically relevant process, typically studied ex situ by X-ray diffraction (XRD). Near-infrared (NIR) spectroscopy is now introduced to provide a complementary local structural description of intercalation with improved control of ex...
Article
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The SW margin of the Zavkhan terrane is significant for research on Paleozoic amalgamation of the Central Asian Orogenic Belt (CAOB). The study area is located in the western part of the Khasagt Mountains, western Mongolia. We present a new preliminary K-Ar dating of metasedimentary rocks from the Yargait Formation which were deformed during collis...
Article
Smectites and vermiculites can be distinguished from each other after Mg²⁺-saturation and solvation with glycerol (GLY). Smectites generally expand to c.a. 18 Å, forming a two-layer complex, while vermiculites to c.a. 14.5 Å, forming a one-layer complex. Additionally, the distribution of layer charges within one population of crystallites can lead...
Article
Full-text available
The abandoned deposit Dobšiná in eastern Slovakia used to be exploited for Ni-Fe-Co sulfarsenides in siderite-ankerite hydrothermal veins. These veins are locally accompanied by alteration zones of fuchsite-quartz-carbonate rocks. The Ni-Fe-Co sulfarsenides are postdated by chalcopyrite and tetrahedrite. This work aims to determine the age of these...
Article
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Lower Oligocene coccolith limestones, known as Tylawa Limestones, in the Polish part of the Outer Carpathians have been analyzed using back-scattered electron (BSE) and charge contrast imaging (CCI) techniques and X-ray diffraction. The aim of the study was to reconstruct the fossilization history of the excellently preserved coccospheres, commonly...
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The diagenetic history of the Ediacaran sedimentary rocks in the East European Craton (EEC) over the area extending from Arkhangelsk (Russia) in the north to Podolia (Ukraine) in the south was revealed by means of the XRD characterization and K‐Ar dating of clay fractions, mudstone porosity measurements, and organic geochemistry investigations. Mud...
Article
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A positive carbon stable isotope excursion of about 3‰ is documented in the topmost lower Frasnian at Padberg, eastern Rhenish Massif, as a muted record of the worldwide early−middle Frasnian isotopic perturbation (punctata Event; up to 6–8‰ shift in both δ¹³Ccarb and δ¹³Corg elsewhere), comparable with the Appalachian δ¹³C curve. This German isoto...
Article
The siloxane surface of uncharged clays is known to be hydrophobic, which is supported by strong experimental and theoretical evidence. For the siloxane surface of charged clays, like smectites, the picture is not as clear. We are aiming to clarify this issue by molecular simulations in which smectite surface hydrophobicity is quantified through th...
Article
The primary aim of this study was the accurate determination of unit-cell parameters and description of disorder in chlorites with semi-random stacking using common X-ray diffraction (XRD) data for bulk powder samples. In the case of ordered chlorite structures, comprehensive crystallographic information can be obtained based on powder XRD data. Pr...
Article
The study is aimed at employing molecular dynamics simulations to study the interactions between smectite and major oil constituents, along with the impact of different brine chemistry (type of cation in a solution) and ionic strength on the compound mobility in fine pores. Clay minerals with smectitic type of mineral outer surface (smectite, illit...
Article
Full-text available
A wide range of various proxies (e.g., mineralogy, organic carbon, inorganic geochemistry, C and Mo isotopes, and framboidal pyrite) were applied for interpretation of changing oceanic redox conditions, bioproductivity, and the regional history of volcanic activity. This resulted in internally consistent interpretation of the late Famennian Hangenb...
Article
Full-text available
A series of laboratory experiments was performed to determine the carbon stable isotopic composition of different combustion/pyrolysis (B/P) products. Variation in the δ ¹³ C values of the products was observed, up to 4‰. The differences in the carbon isotopic compositions of the B/P products were dependent on temperature, time and wood type. Compa...
Article
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Azobenzenes immobilization on a solid support enables the usage of their trans-cis isomerization ability for preparation of functional materials. The behavior of azobenzenes in the interlayer space of α-zirconium phosphate (ZrP) upon the UV-Vis irradiation was investigated. Two experimental approaches were performed: (1) co-intercalation of benzyla...
Article
The Toregua Formation in northern Bolivia comprises a continuous succession of sedimentary rocks containing two glacial intervals related to the onset of the Late Paleozoic Ice Age (LPIA). The provenance and depositional tectonic setting of the Upper Devonian–Mississippian (lower) and Pennsylvanian (upper) glacial intervals are separated by non-gla...
Article
The provenance of top-Famennian sedimentary rocks linked to the Hangenberg Crisis from the northern Rhenish Massif (Germany) was investigated by the means of detrital zircon U-Pb geochronology. Based on the obtained age spectra, three main tectonothermal domains are recognized as possible sources: Paleo- and Mesoproterozoic (~ 2000–1000 Ma) units o...
Article
Ca. 548 Ma old paleosols developed on Ediacaran basalts and almost unaltered by diagenesis were discovered and sampled from several core profiles in Volyn (NW Ukraine). Their mineral composition, elemental geochemistry (major and trace, including REE, plus Fe²⁺/Fe³⁺ ratio by Mössbauer spectroscopy), stable isotope geochemistry (O and C in carbonate...
Article
Several models of ethylene glycol (EG) intercalates were implemented in computer programs which are used to simulate XRD patterns of oriented clay minerals. So far the models assumed distributions of atomic positions perpendicular to the c* direction with similar or significantly higher temperature coefficients B for the EG molecules (B = 1 Ų or 1...
Article
The photoactive azobenzenes were intercalated into montmorillonite and beidellite in order to obtain a functional material responsive to UV radiation. The smectite modification involved two steps: (1) intercalation with alkylammonium salts, differing in alkyl chain length, and (2) co-intercalation with azobenzene or aminoazobenzene. The structure a...
Article
Experimental studies have shown that a sharp, high-frequency IR band at ~3615 cm⁻¹ (in H2O form) and at ~2685 cm⁻¹ (in D2O form) is a common feature for all smectites, and its position correlates with layer charge. In order to explain the molecular origin of this band in terms of total layer charge, charge localization, as well as nature of interla...
Article
Organo-clays represent a special challenge for molecular simulations because they require accurate representation of the clay and the organic/aqueous sections of the model system and accurate representation of the interactions between them. Due to the broad range of force-field models available, an important question to ask is which sets of paramet...
Article
The radioactive decay of 40K to 40Ar is the basis of isotope age determination of micaceous clay minerals in the zone of diagenesis. The difference in K-Ar ages between fine and coarse grained illite particles has been interpreted using detrital-authigenic components system, its crystallization history or post-crystallization diffusion. Yet another...
Article
Full-text available
An overlap of bands produced by the O–H stretching vibrations of H2O (O–Hw) and structural OH (O–Hs) in smectite hampers the study by infrared spectroscopy (IR) of both their layer and interlayer structure. The present study re-evaluated the D2O saturation of smectite as a tool to enable separation of the overlapping bands at ambient conditions. Re...
Article
Full-text available
The thermodynamic stability of methylphenanthrene isomers and the kinetics of reactions involved in their natural destruction/formation have been studied via molecular modelling. The results were combined with published methylphenanthrene abundances in extracts of rocks containing Type III kerogen of a wide maturity range, to evaluate the utility o...
Article
Molecular dynamics simulations were performed in order to study the interactions of ethylene glycol (EG) with smectite. The simulations have also taken into account that EG–smectite complex contains, as a rule, some adsorbed water molecules. The simulations results show that in the two-layer glycolate the content of water is about 1.0 H2O per half...
Chapter
Successful trials of using smectite minerals to adsorb aflatoxins and thus to reduce or to eliminate the toxicity of the mycotoxins to animals and humans have been reported in the literature, but not all smectites have the high selectivity or binding capacity for aflatoxins. This chapter reviewed the interaction mechanisms between smectites and afl...
Article
In sedimentary basins, immediate equilibration with surface and pore waters of Ar, released from K-bearing minerals during their diagenesis or weathering, has been a paradigm for geochemistry and geochronology. Consequently, K–Ar and Ar–Ar isotope geochronology techniques applied to sedimentary rocks are based on an assumption that no measurable ex...
Article
Certain smectites can effectively adsorb aflatoxin B1 but the interaction between the toxin and smectites is still poorly understood. The objective of this study was to computationally evaluate the bonding mechanism between aflatoxin B1 and smectite. Geometry optimization, net atomic charge distribution, vibration frequency and vibration intensity...
Article
Interlayered clays are common constituents of several soil orders. The presence of interlayering is indicated by modified thermal stability of soil vermiculites and smectites. In most studies the clays have been reported as Al-hydroxy-interlayered minerals. Despite the abundance of organic compounds in many soils, the potential existence of soil or...
Article
Full-text available
Remarks on the origin of cerussite in the Upper Silesian Zn-Pb deposits, Poland Cerussite, the most important oxidized lead mineral in the Upper Silesian Zn-Pb deposits, occurs in two readily distinct types: fine-grained cerussite replacing galena in-situ and macrocrystalline cerussite filling open fractures and cavities. Microscopic observations a...
Article
Classical modeling of powdered lamellar structures by X-ray diffraction (XRD) only applies to periodic or quasi-periodic structures and another approach is needed for non-periodic structures. XRD patterns of the non-periodic structures contain a relatively small amount of information and therefore certain initial assumptions are necessary. In case...
Article
Full-text available
Illite age analysis (IAA) is a classical method for extracting diagenetic and detrital ages from mixed ages measured by K-Ar. This approach is based on measuring the masses of diagenetic and detrital illitic components in a few different grain-size fractions of one rock sample and measuring the mixed ages of these fractions. The 1Md illitic polytyp...
Article
Evaluation of the relative thermodynamic stabilities of phenyldibenzothiophenes, by means of molecular modelling, has led to the prediction of their equilibrium mixture composition. The calculated equilibrium composition shifts towards that obtained in a laboratory maturation experiment and encountered in mature geological samples (mean vitrinite r...

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