Magnetostratigraphy and magnetic susceptibility of the best developed Pleistocene loess-palaeosol sequences of Ukraine: implications for correlation and proposed chronostratigraphic models

Hlavatskyi, Dmytro; Бахмутов, В. Г.

doi:10.7306/gq.1544

Cited by 5 publications

(45 citation statements)

References 79 publications

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“…The Lubny soil, in the lower part of which the Matuyama-Brunhes reversal was detected, has been reinterpreted as the correlative of the Shyrokyne (R-S7) unit. The re versed polarity zone above, in the inter pre tation of [Hlavatskyi, Bakhmutov, 2020], re presents Stage 17 excursion (at 670 ka), in dicating the end of the Martonosha (R-S6, MIS 17) stage. For establishing the chronostratigraphy for the Roksolany section, the stratigraphy of the key locality of the loess-palaeosol sequence at Vyazivok was used as a corner stone.…”

Section: Introductionmentioning

confidence: 95%

“…The results of early research, due to the lack of accurate magnetometers and some methodological issues, in many cases led to misinterpretations. An illustrative example is the contradiction in the definition of the Matuyama-Brunhes boundary (MBB) in the Roksolany section by different scientific teams (discussed in [Hlavatskyi, Bakhmutov, 2020]).…”

Section: Introductionmentioning

confidence: 99%

“…This section is 59 m thick and includes well developed pedocomplexes which alternate with thick loess units. The new results of rock magnetic studies and the stratigraphic positioning of the MBB were presented recently in [Hlavatskyi et al, 2016b;Hlavatskyi, Bakhmutov, 2020]. The MBB has been detected at the depth of 56.2 m within the Lower Shyrokyne palaeosol 'sh 1 ' (according to stratigraphic subdivision of [Veklitch, 1982;Matviishina et al, 2001]).…”

Section: Introductionmentioning

confidence: 99%

“…This section is one of the most representative exposures of the Pleistocene loess series in the Black Sea Lowland (approximately 55 m thick). The stratigraphy of the Roksolany section and the position of the MBB was a matter of debate for a long time (for a comprehensive overview, see [Hlavatskyi, Bakhmutov, 2020]). Our initial palaeomagnetic studies of the Roksolany profile (Bakhmutov, Hlavatskyi, 2014;Bakhmutov et al, 2017;Hlavat skyi, Bakhmutov, 2019) revealed that the MBB is located at a depth of 46.6 m between two soils, which were stratified by [Gozhik et al, 1995[Gozhik et al, , 2000[Gozhik et al, , 2007Bogucki et al, 2013;Łanc zont, Madeyska, 2015;Nawrocki et al, 2018] as the Lubny (MIS 13-15) and Martonosha (MIS 17-19) units.…”

Section: Introductionmentioning

confidence: 99%

“…A narrow zone of reversed polarity was also established at 42.0-42.5 m depth in the uppermost part of the Zavadivka soil. In our recent study [Hlavatskyi, Bakhmutov, 2020], we have proposed a new chronostratigraphic model following the Chinese loess designation system, supported by magnetic susceptibility variations, magnetostratigraphic markers, compiled exis ting radiocarbon and optically luminescence dates, local and regional sedimentological and palaeosol proxies. The Lubny soil, in the lower part of which the Matuyama-Brunhes reversal was detected, has been reinterpreted as the correlative of the Shyrokyne (R-S7) unit.…”

Section: Introductionmentioning

confidence: 99%

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Significance of the Ukrainian loess-palaeosol sequences for Pleistocene climate reconstructions: rock magnetic, palaeosol and pollen proxies

Hlavatskyi

Gerasimenko

Бахмутов

et al. 2021

GZh

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Variations of rock magnetic parameters in loess-palaeosol sequences, related to climatic and environmental conditions during their formation, are a powerful tool for palaeoclimate reconstruction. Combined enviromagnetic study of loess deposits in Ukraine and its assessment for the palaeoreconstruction purposes are carried out in the framework of the National Research Foundation of Ukraine project 2020.02/0406 ‘Magnetic proxies of palaeoclimatic changes in the loess-palaeosol sequences of Ukraine’. Environmental/climatic reconstructions of the past are fulfilled using a significant number of palaeoindicators: morphology and lithological properties of palaeosols and loesses, their pollen assemblages and a wide range of magnetic characteristics. In this paper, we present a multi-proxy approach to palaeoenvironmental reconstructions, and introduce preliminary results obtained from magnetic susceptibility of loess-palaeosol sequences in the northern (at Vyazivok), central (Stari Kaydaky) and southern (Roksolany) parts of the Ukrainian loess belt. The amplitudes of palaeoclimate change established using magnetic proxies are well correlated with the lithological, palaeopedological and palynological patterns of the sites, and with the global oxygen-isotope scale (MIS). Ongoing studies of the Stari Kaydaky section confirm the correlation of the Upper Zavadivka (S3) soil unit and Lower Zavadivka (S4) soil unit with MIS 9 and MIS 11, respectively (this was proved earlier at the Vyazivok and Roksolany sites). The underlying Lubny (S5) pedocomplex likely corresponds to MIS 13, and the Martonosha (S6) pedocomplex to MIS 15. Palaeomagnetic investigations at Stari Kaydaky have not so far reached the Lower Shyrokyne unit, in which the Matuyama—Brunhes boundary has been detected at Roksolany and Vyazivok. The Upper Shyrokyne (S7S1) palaeosol unit has normal polarity and is preliminarily correlated with MIS 17.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Significance of the Ukrainian loess-palaeosol sequences for Pleistocene climate reconstructions: rock magnetic, palaeosol and pollen proxies

Hlavatskyi

Gerasimenko

Бахмутов

et al. 2021

GZh

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Geophysical sediment properties of a late Pleistocene loess–paleosol sequence, Chenarli, northeastern Iran

et al. 2023

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We present stratigraphic, magnetic, diffuse reflectance spectrophotometric analyses, and chronologic data for the Chenarli loess–paleosol sequence in northeastern Iran. Eight loess units (LU) are identified, described, and constrained in time based on relative stratigraphy and luminescence dating from >130 ± 9.1 ka to ~9.8 ± 0.7 ka. Our data indicate that pedogenic magnetite/maghemite formation gives rise to magnetic enhancement in modern soil and paleosols. The top of LU 7 is demarcated by the well-developed last interglacial soil in which magnetic depletion occurred. We infer that magnetic depletion in this paleosol was produced by reducing conditions in a seasonally waterlogged soil during a warm and wet phase within Marine Isotope Stage (MIS) 5e. Units LU 6 to 1 record several episodes of dust accumulation and soil formation during the last glacial and Holocene. Increased dust accumulation rates occurred during middle-late MIS 3 and lasted into the late MIS 2, with a peak during the last glacial maximum (LU 2). These findings could be applicable to understanding magnetic enhancement/dissolution mechanism in the loess–paleosol sequences in study area. We infer paleoenvironmental changes in northeastern Iran relative to northern Iran, Eurasia, and China.

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Rock magnetic and palaeomagnetic studies of loess-palaesol sections — Lower Palaeolithic sites within the Southern Bug Valley (Medzhybizh, Holovchyntsi)

Hlavatskyi

Степанчук

Kuzina

et al. 2021

GZh

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Combined rock magnetic and palaeomagnetic studies of loess-soil sections — Lower Paleolithic sites in the valley of the Southern Bug (Medzhybizh, Holovchintsi) — have been performed for the first time in order to determine the suitability of these objects for palaeomagnetic study and the establishment of magnetostratigraphic markers. Investigated sections by rock magnetic characteristics are closest to the sections of the Volynian Upland, and refer to the intermediate «Chinese» type of formation of magnetic properties, with an admixture of the «Alaskan» mechanism. These sections are characterized by a low concentration of ferrimagnetic material, the destruction of the primary sedimentary magnetic texture, which makes them unsuitable for qualitative magnetostratigraphic studies. According to the data of magnetic-mineralogical analysis, the samples are subdivided into three groups: the first group includes samples with new formation at 300 °C, which is associated with iron hydroxides or the presence of organic matter; in the second group, the thermomagnetic curves are not informative, which makes it difficult to determine the minerals-carriers; in some samples, the magnetization carrier is magnetite (with defects or finely dispersed). A zone of normal polarity, probably the Brunhes chron, has been reliably determined in the upper part (G-S7S1 soil) of the Holovchyntsi section. In the lower part of the M-S4 soil unit (MIS 11) at Medzhybizh, the Unnamed geomagnetic event at 430 ky has been detected. The paleomagnetic veracity of the remaining investigated layers is questioned. The analogies for the archaeological assemblages from the lower layers of Medzhybizh-A and Holovchintsi-1 are seen in archaic industries of mode 1, which in southeastern Europe are dated back from 800 ky and older. However, reliable data on the Matuyama—Brunhes boundary and, correspondingly, data on the >780 ky age of any layers with artifacts in the Medzhybizh and Holovchintsi sections were not obtained by the palaeomagnetic studies.

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Magnetostratigraphy and magnetic susceptibility of the best developed Pleistocene loess-palaeosol sequences of Ukraine: implications for correlation and proposed chronostratigraphic models

Abstract: Magnetostratigraphy and mag netic sus cep ti bil ity of the best de vel oped Pleis tocene loess-palaeosol se quences of Ukraine: im pli ca tions for cor re la tion and pro posed chronostratigraphic models. Geo log i

Cited by 5 publications

References 79 publications

Significance of the Ukrainian loess-palaeosol sequences for Pleistocene climate reconstructions: rock magnetic, palaeosol and pollen proxies

Significance of the Ukrainian loess-palaeosol sequences for Pleistocene climate reconstructions: rock magnetic, palaeosol and pollen proxies

Geophysical sediment properties of a late Pleistocene loess–paleosol sequence, Chenarli, northeastern Iran

Rock magnetic and palaeomagnetic studies of loess-palaesol sections — Lower Palaeolithic sites within the Southern Bug Valley (Medzhybizh, Holovchyntsi)

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