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  • 551  (2)
  • 567; AGE; Alkenone, unsaturation index UK'37; Alkenones; Biomarkers; DEPTH, sediment/rock; Eastern Mediterranean; FTICR-MS; Gravity corer (Kiel type); Last Interglacial; M51/3; M51/3_567_SL104; MALDI; Mass spectrometry imaging; Meteor (1986); Sapropel S5; Sea surface temperature, annual mean; SL; SST; UK'37; Uncertainty; ZOOMecular; Zooming into paleoenvironmental and biogeochemical processes through molecular imaging of biomarker distributions in sediments  (1)
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  • 1
    Publication Date: 2021-07-21
    Description: The Upper Pleistocene geoarchives in the south‐eastern Carpathian Basin are represented predominantly by loess–palaeosol records. In 2015, a 10 m sediment core composed of clay‐rich lacustrine sediments was recovered by vibracoring a dry lake basin located between the Vršac Mountains (Serbia) and the Banat Sands in the south‐eastern Carpathian Basin; a location relevant for placing regional archaeological results in a palaeoenvironmental context. Here, we present results from geoelectrical prospection and a lithostratigraphic interpretation of this sequence supported by a detailed granulometric study supplemented by ostracod analysis. An age model based on luminescence dating is discussed against sedimentological proxy data and its implication for palaeoenvironmental change. The cores show a stratigraphy of lighter ochre‐coloured and darker greyish sediment, related to the deposition of clay and silt trapped in an aquatic environment. Geophysical measurements show ~20 m thick lacustrine sediments. The grain‐size distributions including the variability in fine clay are indicative of a lacustrine environment. Fine particles were brought into the depositional environments by aquatic input and settled from suspension; also, direct dust input is constrained by grain‐size results. Riverine input and aeolian dust input interplayed at the locality.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Program IDEI_Proiecte de Cercetare Exploratorie
    Description: Serbian Ministry of Education, Science and Technological Development
    Keywords: 551 ; 554 ; Carpathian Basin ; Late Quaternary ; lacustrine sediment ; geoelectric analyses ; luminescence dating ; grain‐size analysis ; environmental dynamics
    Type: article
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  • 2
    Publication Date: 2021-11-03
    Description: Stable organic carbon and nitrogen isotopes can be used to interpret past vegetation patterns and ecosystem qualities. Here we present these proxies for two loess-palaeosol sequences from the southern Carpathian Basin to reconstruct the palaeoenvironment during the past 350 ka and establish regional commonalities and differences. Until now, isotopic studies on loess sequences from this region were only conducted on deposits from the last glacial cycle. We conducted methodological tests concerning the complete decalcification of the samples prior to stable isotope analyses. Two decalcification methods (fumigation method and wet chemical acidification), different treatment times, and the reproducibility of carbon isotope analyses were tested. Obtained results indicate that the choice of the decalcification method is essential for organic carbon stable isotope analyses of loess-palaeosol sequences because ratios vary by more than 10‰ between the wet chemical and fumigation methods, due to incomplete carbonate removal by the latter. Therefore, we suggest avoiding the fumigation method for studies on loess-palaeosol sequences. In addition, our data show that samples with TOC content 〈0.2% bear increased potential for misinterpretation of their carbon isotope ratios. For our sites, C3-vegetation is predominant and no palaeoenvironmental shifts leading to a change of the dominant photosynthesis pathway can be detected during the Middle to Late Pleistocene. Furthermore, the potential for further stable nitrogen isotope studies is highlighted, since this proxy seems to reflect especially past precipitation patterns and reveals favourable conditions in the southern Carpathian Basin, especially during interstadials.
    Keywords: 551 ; southern Carpathian Basin ; loess-palaeosol sequences ; stable isotope analyses ; Pleistocene ecosystem reconstruction
    Language: English
    Type: map
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  • 3
    Publication Date: 2024-02-02
    Keywords: 567; AGE; Alkenone, unsaturation index UK'37; Alkenones; Biomarkers; DEPTH, sediment/rock; Eastern Mediterranean; FTICR-MS; Gravity corer (Kiel type); Last Interglacial; M51/3; M51/3_567_SL104; MALDI; Mass spectrometry imaging; Meteor (1986); Sapropel S5; Sea surface temperature, annual mean; SL; SST; UK'37; Uncertainty; ZOOMecular; Zooming into paleoenvironmental and biogeochemical processes through molecular imaging of biomarker distributions in sediments
    Type: Dataset
    Format: text/tab-separated-values, 18490 data points
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