Fallout isotope chronology of the near-surface sediment record of Lake Bolătău

Bihari, Árpád; Karlik, Máté; Mîndrescu, Marcel; Szalai, Zoltán; Grădinaru, Ionela; Kern, Zoltán

doi:10.1016/j.jenvrad.2017.10.009

Cited by 5 publications

(10 citation statements)

References 35 publications

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“…In the top of the lake the dissolved oxygen value was between 8-9 mg/L, which attenuate to 0.2 mg/L in the deepest section. Indeed, these redox conditions make the bottom water to become very methanogenic (Karlik et al, 2018).…”

Section: Location and Main Details Of The Lake Bolătău And The Catchm...mentioning

confidence: 99%

“…The first detailed micro sedimentological and geochronological analyses proved the great potential of the Bolătău sediment archive for future high resolution paleolimnological investigations (Mîndrescu et al, 2016). To make a high-quality time model the sediment chronology model was based on two different isotopes methods: the chronology based on radiocarbon (Mîndrescu et al, 2016) and the another one, Pb-210 ages (Bihari et al, 2018).…”

Section: Chronology Of the Sedimentmentioning

confidence: 99%

“…Pb-210 (T1/2=22.23 yr) is one of the most used isotopes in the first 150 years sediment dating processes and used in lakes with similar conditions in Romania (Appleby, 2001(Appleby, & 2008Begy et al, 2009Begy et al, & 2011. The Pb-210 chronology and the calculations were published in Bihari et al, (2018), where they used different accumulation models in the calculated Pbex-210 (Fig. 2).…”

Section: Chronology Of the Sedimentmentioning

confidence: 99%

“…The same software was used for the calibration of 14 C dates to calendar years in conjunction with the Northern Hemisphere IntCal13 (Reimer et al, 2013) dataset. The bottom of the lake sediments was ~6000 year old (Karlik et al, 2018).…”

Section: Chronology Of the Sedimentmentioning

confidence: 99%

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High Resolution Mineralogical Characterization of Sediments - Lake Bolătău-Feredeu (Romania)

Karlik¹,

Climatology²,

Debrecen³

et al. 2021

Carpath. J. Earth Environ. Sci.

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The catchment (bedrock and soil) and sediments of lake Bolătău, Romania were studied by high resolution multi-methodological investigations to characterize paleoenvironmental and formation conditions. Particle size analyses, optical and cathodoluminescence microscopy, FTIR-ATR and Raman spectroscopy, X-ray powder diffraction, and XRF were applied for microtextural, chemical, micro-mineralogical and embedded organic material characterization and distribution of the sediments, especially concerning geochemical conditions, like pH and redox potential change. Our results support physical and chemical weathering in the process of soil formation with appearance of the new minerals appear (10Å sized phyllosilicates and clay minerals). Comparison of these studies offer possible differentiation of syn- and diagenetic mineralization, the clarification of debris contribution, microbial mediation and complex mineralization via decomposition of cell and extracellular polymeric substance. Based on the analyses on the abrasives, a suboxic environment prevailed in the depositional area and considerable microbial contribution is proposed via accumulation of lake sediments.

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Section: Location and Main Details Of The Lake Bolătău And The Catchm...mentioning

confidence: 99%

Section: Chronology Of the Sedimentmentioning

confidence: 99%

Section: Chronology Of the Sedimentmentioning

confidence: 99%

Section: Chronology Of the Sedimentmentioning

confidence: 99%

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High Resolution Mineralogical Characterization of Sediments - Lake Bolătău-Feredeu (Romania)

Karlik¹,

Climatology²,

Debrecen³

et al. 2021

Carpath. J. Earth Environ. Sci.

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“…mid-1960s: global fallout maximum; 1986: Chernobyl event) (Mîndrescu, M. et al 2016). The sediment chronology of the top 24 cm has been significantly improved using by 210 Pb chronology (Bihari, Á. et al 2018). The 210 Pb ages for the top 20 cm (with an uncertainty of the estimated ages below 30%) and all 14 C dates were included in the Bayesian age-depth model using the P_Sequence function of the OxCal v.4.2 (Bronk Ramsey, C. 2009) software (Figure 2).…”

Section: Chronologymentioning

confidence: 99%

Natural and anthropogenic impacts reflected by paleoclimate proxy parameters in a lake-forest system in Bukovina, Romania

et al. 2021

Self Cite

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The research area is located in the Eastern Carpathians, Romania. This region is rich in various formations and indicates significant potential for paleo-environmental reconstruction. The present research was carried out on sediment cores collected at lake Bolătău-Feredeu, Feredeului Mountains (Eastern Carpathians, Romania). Preliminary examination of the sediment confirmed the possibility for data analysis with high temporal resolution. The aim of the research was to clarify and supplement the findings of previous research at this site, to explore the relationships between proxy parameters and to elucidate the cause for the changes. Core dating was carried out using 210Pb and radiocarbon isotopes and indicated that sediment cores span the past 500 years. The research uses a wide range of methodologies, including organic geochemistry with calculated n alkane indices (Phw and Pwax). Based on these proxies, the changes of woody and herbaceous coverage in the catchment can be estimated. Moreover, element concentration, weathering indices and particle size distribution assist to detect climate changes in the catchment area. The data and conclusions yielded by the analysis were compared with the regional modelled temperature profile, based on which five periods were separated. In addition to natural and anthropogenic events, the main factor among the natural processes is the change in annual temperature. Based on the obtained data, several parameters were found to be suitable for monitoring past temperature changes.

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Natural and anthropogenic changes in a lake-forest system in Bukovina (Romania) since 1340 AD documented by sedimentary organic geochemistry (C, N and n-alkanes)

Karlik

Fekete

Mîndrescu

et al. 2018

Quaternary International

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Fallout isotope chronology of the near-surface sediment record of Lake Bolătău

Cited by 5 publications

References 35 publications

High Resolution Mineralogical Characterization of Sediments - Lake Bolătău-Feredeu (Romania)

High Resolution Mineralogical Characterization of Sediments - Lake Bolătău-Feredeu (Romania)

Natural and anthropogenic impacts reflected by paleoclimate proxy parameters in a lake-forest system in Bukovina, Romania

Natural and anthropogenic changes in a lake-forest system in Bukovina (Romania) since 1340 AD documented by sedimentary organic geochemistry (C, N and n-alkanes)

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