Mladjen Jovanovic - Profile on Academia.edu (original) (raw)

Papers by Mladjen Jovanovic

Integrating magnetic susceptibility and colorimetric parameters for palaeoenvironmental reconstructions from loess-palaeosol sequences: A case study from northern Serbia for the last 430 ka

AGU Fall Meeting Abstracts, Dec 1, 2020

Warm glacial climate during loess deposition recorded at exposures of the Pozarevac brickyard, NE Serbia

Vojvodinian loess-paleosol sequences as archive of repeated Pleistocene paleoclimatic changes

The Late Pleistocene loess-paleosol sequence Miseluk

Since several years increasing fossil charcoal and malacological evidence from loess-palaeosol se... more Since several years increasing fossil charcoal and malacological evidence from loess-palaeosol sequences in the Carpathian Basin is questioning the traditional paradigm of treeless full glacial palaeoenvironments. In this paper we present first alkane results from recent forests and grasslands as well as from a loess-palaeosol sequence on the Ba čka Loess Plateau in-between Danube and Tisa. We discuss the potential of the alkane biomarkers for the reconstruction of the vegetation history and provide a first tentative interpretation for the last glacial cycle.

Frontiers in Earth Science, 2021

In mid-latitude Eurasia, loess-paleosol sequences (LPS) provide the most widespread sedimentary r... more In mid-latitude Eurasia, loess-paleosol sequences (LPS) provide the most widespread sedimentary records of Quaternary paleoenvironmental evolution. In the Middle Danube Basin (MDB), these archives cover at least the last million years of climate history, and occasionally contain archeological findings. The studied Zemun LPS is located on the right bank of the Danube in Northern Serbia. The site was declared as a protected site, based on Paleolithic artifacts found on the riverbank and stemming from unknown stratigraphic levels of the loess cliffs exposed along the Danube. The present study aims to provide a stratigraphic, paleoenvironmental, and temporal context for the Zemun LPS by means of environmental magnetic and colorimetric methods. Our investigations result in a chronostratigraphic scheme allowing direct comparison with other well-established reference records in the MDB and elsewhere. Two potential tephra layers tentatively assigned to the so-called L2 and Bag tephras, whic...

Quaternary International, 2017

The results of stratigraphy of the Sombor and Subotica boreholes were first results of geological... more The results of stratigraphy of the Sombor and Subotica boreholes were first results of geological examination of borehole material from Vojvodina published by Halav ats in 1895. These geological profiles, alongside the borehole profile in Zrenjanin, were recognized as "standard" profiles for Quaternary geology and stratigraphic correlation pertaining to Vojvodina. However, the results of taxonomical revisions for malacologic material, published in 1977 by Krolopp and which presented significant changes in stratigraphy, have not been implemented in the results of geological mapping/surveying. According to new advances and results regarding Quaternary stratigraphy, Lower Pleistocene sediments can be better defined using Pleistocene Corbicula beds, the Viviparus boeckhi Horizon and the results yielded by this paper. In the case of the Sombor borehole, the Lower Pleistocene was defined at a depth from 48.13 m to 149.5 m, according to its palaeonological record (molluscan assemblage). The Lower-and/or Middle Pleistocene were defined as the interval between a 35.45 m and 48.13 m depth, based on sedimentology (lignite) and malacology. The interval from 15.21 m to 35.45 m depth was identified as Pleistocene, based on superposition and palaeontological material. The yellow quartz sand horizon at 9.74 me15.21 m remains undefined. The Holocene yellow silty-clay horizon, which ascends to a 9.74 m depth, was identified as Holocene, according to the palaeontological content of the same sediments found in the brickyard in the vicinity of Sombor. In the case of the Subotica borehole, the Lower Pleistocene e based on palaeontological records e was defined at a depth between 99.6 m and 124.5 m. The depth from 2.2 m to 99.6 m could not be exactly identified as Pleistocene, while Holocene quicksand ascended to a 2.2 m depth.

Paleosurface reconstruction of the Titel loess plateau (Vojvodina, Serbia) using GIS

After KUKLA, FINK, LOZEK and PECSI had created their classical Danube loess stratigraphic models ... more After KUKLA, FINK, LOZEK and PECSI had created their classical Danube loess stratigraphic models the focus of loess researchers has shifted to the thick loess-paleosol sequences of China and Central Asia. However, recent research has begun to highlight the significance of Danubian loess sequen- ces, particularly the exposed sequences in the southern Danube basin in Serbia. The stratigraphic models used in the Danube basin vary between countries and often use complex nomenclature. This is in part due to historial separation of research groups and the predominantly incomplete pre- servation of loess sequences in the region. However, because of the relative completeness of the loess record, and the length of time represented in the sequences, the exposures of loess in Serbia provide the opportunity to develop a unified stratigraphic model for Middle and Late Pleistocene loess in the Danube basin.

The revision of Quaternary stratigraphy of the Zrenjanin artesian well borehole profile (Banat, Vojvodina, Serbia)

Annales g?ologiques de la Peninsule balkanique

The geological analysis of artesian borehole material from Sombor, Subotica, and Zrenjanin, was i... more The geological analysis of artesian borehole material from Sombor, Subotica, and Zrenjanin, was in the first campaign of detailed stratigraphic studies of Vojvodina in 1892-1895. The results of Quaternary stratigraphy from Zrenjanin were published by HalaVaTS more than a decade later (1914). The significance of the Zrenjanin, Sombor, and Subotica artesian well profiles for more than a century is considered the representative local profiles for the Quaternary stratigraphy of Vojvodina recognized by Serbian (Yugoslavian) and Hungarian geologists. Significant changes were after the taxonomical revision of molluscan material and its stratigraphic context, which was done through the excellent work of Krolopp in the 1970-ies. Unfortunately, the mentioned changes were not applied in the studies during the geological surveying of former Yugoslavia. The developments in Quaternary geology, changes in the Quaternary chronostratigraphic scale, and the results shown by this paper enable the lowe...

Linking the Loesspaleosol Record of Pleistocene Climate in Serbia with the Expanding Central European Aminostratigraphy

XVI INQUA …, 2003

Numerous loess-paleosol sections have been investigated along Fruska Gora in Vojvodina, Serbia, a... more Numerous loess-paleosol sections have been investigated along Fruska Gora in Vojvodina, Serbia, and a detailed paleoclimate record for the mid to late Pleistocene is emerging for south-central Europe. In order to test regional stratigraphic correlations and correlate with ...

Orbital and glacial/interglacial forcing reflected by integrated environmental magnetic and colorimetric parameters of a loess-palaeosol sequence in the middle Danubian Basin for the last 430 ka

Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France (1); Leibniz Ins... more Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France (1); Leibniz Institute for Applied Geophysics, Section 5, Hannover, Germany (2); Chair of Geomorphology, University of Bayreuth, Bayreuth, Germany (3); BayCEER, University of Bayreuth, Bayreuth, Germany (4); Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia (5); Serbian Academy of Sciences and Arts, Belgrade, Serbia (6) <br> <br>Loess-palaeosol sequences (LPSs) are valuable records of Quaternary environmental change especially in the northern hemisphere. In Eurasian LPS, the alternation of loess and palaeosol intervals reflects the uninterrupted but fluctuating dust deposition during the Quaternary and the fluctuations of temperature and precipitation responsible for the formation of palaeosol horizons. At Zemun (Middle Danube Basin, Serbia), a studied LPS covers four interglacial-glacial cycles. We use standard colorimetric data, containing luminance (L*), redness (a*) and bluen...

Netherlands Journal of Geosciences, 2012

Loess deposits in the Vojvodina region, northern Serbia, are among the oldest and most complete l... more Loess deposits in the Vojvodina region, northern Serbia, are among the oldest and most complete loess-paleosol sequences in Europe to date. These thick sequences contain a detailed paleoclimatic record from the late Early Pleistocene. Based on the correlation of detailed magnetic susceptibility (MS) records from Vojvodina with the Chinese loess record and deep-sea isotope stratigraphy we here reconfirm and expand on a stratigraphic model of the Vojvodinian loess-paleosol chronostratigraphic sequence following the Chinese loess stratigraphic system.Variations in MS, dust accumulation rates, and the intensity of pedogenesis demonstrate evidence for a Middle Pleistocene climatic and environmental transition. The onset of loess deposition in Vojvodina also indicates a direct link between dust generation in Europe and that in the interior of Eurasia since the Early Pleistocene. The youngest part of the Early Pleistocene and oldest part of the Middle Pleistocene is characterised by relati...

Palaeogeography, Palaeoclimatology, Palaeoecology, 2014

The important role of roots and rhizosphere processes is accepted for the top soil, but still und... more The important role of roots and rhizosphere processes is accepted for the top soil, but still under debate for the deep subsoil including soil parent material. Especially for terrestrial sediments like loess and dune sands, roots and root traces are mostly recognized in profile descriptions, but not interpreted in the paleoenvironmental context. Further, synchrony of sediment deposition and root trace formation is commonly assumed. This is challenged by partially large maximum rooting depths of plants, exceeding the soil depth, and by frequent occurrence of secondary carbonates and biopores of potential root origin below recent soil and paleosols. To improve understanding of paleoenvironmental records in terrestrial sediment-paleosol sequences, recent roots and root traces, including calcified roots and root-derived biopores, were investigated in six soil, loess and dune sand profiles across Central and SE Europe. Visualization of small carbonate accumulations (diameter ≤1 mm), frequently called 'pseudomycelia', by X-ray microtomographic scanning, and morphologic comparison with rhizoliths (calcified roots; diameter mostly 3-20 mm, up to 100 mm possible) indicate root origin of the former, therefore requiring renaming to microrhizoliths. Quantification of roots, biopores, rhizoliths and microrhizoliths on horizontal levels yielded maximum frequencies of 2100 m -2 , 4100 m -2 , 196 m -2 and 12,800 m -2 , respectively. Considering the pore volume remaining from former root growth this indicates their significant contribution to structural properties of the sediments and paleosols. Depth distribution of roots and root traces was frequently related to soil and paleosols, respectively, and mostly showed maximum frequencies within or immediately below these units. Root traces are therefore not necessarily of similar age like the surrounding sediment, but are typically of younger age. The time lag between root traces and the surrounding stratigraphic unit can vary between small time periods (likely decades to centuries) in case of microrhizoliths and several millenia in case of larger rhizoliths penetrating several stratigraphic units. With assumed radii of former rhizosphere extension of 5 mm for microrhizoliths, a frequency of 12,500 m -2 corresponded to 100% rhizosphere area in the respective depth interval. These findings emphasize the meaning of root traces in sediment-paleosol sequences. Potential temporal and spatial inhomogeneity of root growth on the one hand, especially for shrub and tree vegetation, and occurrence of root remains of different age and origin in identical depth intervals on the other hand, hamper the assessment of the chronologic context of these with the surrounding sediment or paleosol. Nevertheless, root traces in terrestrial archives provide valuable information with respect to paleovegetation and paleoenvironmental conditions, if their chronological context is known.

Palaeoenvironment and geoconservation of mammoths from the Nosak loess–palaeosol sequence (Drmno, northeastern Serbia): Initial results and perspectives

Quaternary International, 2014

ABSTRACT a b s t r a c t A Quaternary site at Drmno (comprising of Middle and Late Pleistocene lo... more ABSTRACT a b s t r a c t A Quaternary site at Drmno (comprising of Middle and Late Pleistocene loessepalaeosol sequences) near Kostolac, northeast Serbia, attracted attention from the general public and scientists, when several steppe mammoth and other mammal skeletons from Middle Pleistocene fluvial deposits were discovered in 2009 and 2012. This paper presents the combination of malacological and enviromagnetic analyses, preliminary luminescence dating, litho-pedostratigraphic and palaeo-relief investigations that were applied to the Nosak loessepalaeosol sequence for the 2012 findings. The results confirm and emphasize the antiquity of the sediments preserved in the Nosak section and demonstrate the significance of the detailed and relatively complete palaeoenvironmental record they contain. These discoveries can significantly contribute to setting the background towards an improved understanding of the evolution of mammoths on the European continent. Ó 2013 Elsevier Ltd and INQUA.

Quaternary International, 2009

High-resolution study of the Surduk loess palaeosols sequence in Serbia (Vojvodina) has been perf... more High-resolution study of the Surduk loess palaeosols sequence in Serbia (Vojvodina) has been performed within a research project (EOLE) focusing on the impact of rapid climatic changes during the last climatic cycle in the European loess belt. The methodology used for this multidisciplinary approach is based on a continuous sampling column that allows a very accurate correlation between all studied proxies (magnetic susceptibility, grain size and organic carbon) and the dated samples (IRSL, 14 C). According to the stratigraphical and sedimentological data, the Surduk loess sequence appears as a very complete record of the last climatic cycle (19 m), and exhibits a similar pattern than other contemporaneous loess sequences from Western, Central and Eastern Europe. The main difference is the evidence of a drier environment all over the last climatic cycle (sedimentological and palaeopedological data). The high-resolution grain size record (5 cm) is well correlated with stratigraphical boundaries, and highlights a strong variability within the loess deposition, especially during the Upper Pleniglacial between ca. 33 and 15 ka. During the Upper Pleniglacial, a succession of millennial-timescale events, characterised by the deposition of coarser loess, are particularly well evidenced by grain size data as in some west-European records. Finally, an attempt to correlate the variations of grain size parameters at Surduk with the Greenland GRIP dust record is proposed. According to this study, millennial-timescale climatic events that characterise the North Atlantic area during the last climatic cycle have thus been recorded in the environments located at the southern border of the European loess belt.

Journal of Quaternary Science, 2007

Late Pleistocene loess-palaeosol sequences are widespread in the Vojvodina region, with thickness... more Late Pleistocene loess-palaeosol sequences are widespread in the Vojvodina region, with thicknesses reaching a maximum of about 20 m. Our investigations include more than 40 of these loess sections. Geochronology of the last glacial loess-palaeosol sequences, based on luminescence dating and amino acid racemisation, provides correlations between Upper Pleistocene loess-palaeosol sediments in Vojvodina and comparable deposits at other European localities. Sedimentary logs of magnetic susceptibility, grain-size measurements and carbonate content, combined with malacological evidence, indicate two main relatively cold and arid phases during the last glacial period, related to intensive accumulation of loess units L1L1 and L1L2, as well as many brief episodes of dry and windy climatic conditions, suggesting a possible relationship with cold events recorded in the North Atlantic region. Generally, late Pleistocene climate in the region was dry and relatively warm, compared with glacial period sites in central Europe, and was characterised by sharp differences between glacial and interglacial modes. New data and interpretations presented in this study emphasise the significance of loess-palaeosol sequences in Vojvodina for the reconstruction of the temporal and spatial evolution of late Pleistocene palaeoclimate in this part of Europe.

Acta geographica Slovenica, 2011

The Borkovac reservoir with Fru{ka Gora Mountain in the background. Zajezitev Borkovac s Fru{ko g... more The Borkovac reservoir with Fru{ka Gora Mountain in the background. Zajezitev Borkovac s Fru{ko goro v ozadju.

Geographica Pannonica, 2006