Enrichment and depletion of major and trace elements, and radionuclides in ombrotrophic raw peat and corresponding humic acids

Zaccone, Claudio; Cocozza, Claudio; Cheburkin, A.; Shotyk, William; Miano, Teodoro

doi:10.1016/j.geoderma.2007.06.007

Cited by 54 publications

(31 citation statements)

References 30 publications

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“…However, the 137 Cs activity has been detected especially in the upper part of profile, suggesting a possible influence of plant uptake, and until 36 cm of depth, corresponding to the first years of the XIX century, underling a significant downward movement of this radionuclide along the profile. This vertical migration is consistent with the 137 Cs profile reported in another core (2H) from the same site by Zaccone et al (2007c) and in other Irish peat bogs by several Authors (Mitchell et al 1992;Gallagher et al 2001;Coggins et al 2006).…”

Section: Coppersupporting

confidence: 91%

Highly Organic Soils as “Witnesses” of Anthropogenic Pb, Cu, Zn, and 137Cs Inputs During Centuries

Zaccone

Cocozza

Cheburkin

et al. 2007

Water Air Soil Pollut

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Highly organic soils, and in particular ombrotrophic bogs, have been often used to reconstruct climate changes and heavy metal contaminations. Ombrotrophic peat bogs, in fact, are domed peatlands in which the surface layers are hydrologically isolated from the influence of local groundwaters and surface waters, and are supplied only by atmospheric depositions. In the present work, the attention of Authors has been focused on Pb, Cu, and Zn, coming mainly from anthropogenic activities, and 137 Cs, released mostly during the Chernobyl disaster. Practically, an undisturbed peat profile was cored in 2005 from a Swiss ombrotrophic bog and analysed using energy-dispersive miniprobe multielement analyzer X-ray fluorescence and Low Background γ-ray spectrometry in order to investigate and quantify the impact of human activities (e.g.

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Section: Coppersupporting

confidence: 91%

Highly Organic Soils as “Witnesses” of Anthropogenic Pb, Cu, Zn, and 137Cs Inputs During Centuries

Zaccone

Cocozza

Cheburkin

et al. 2007

Water Air Soil Pollut

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“…The column was cut at the site using a ceramic knife and was bulked at each 10 cm horizon. Similar to previous studies, we present the average depth of each horizon, corresponding to the middle position (Zaccone et al, 2007). Note that the alternative way of sampling would be cutting the cores into 1 cm slices in order to maximize the signal/noise ratio of the peaks in trace element concentrations, used to improve the accuracy, reproducibility and reliability of peat cores from bog as archives (Givelet et al, 2004;Zaccone et al, 2012).…”

Section: Study Sites Sampling Analyses and Statisticsmentioning

confidence: 97%

Elemental composition of peat profiles in western Siberia: Effect of the micro-landscape, latitude position and permafrost coverage

Степанова

Pokrovsky

Viers

et al. 2015

Applied Geochemistry

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“…Carbonate minerals have not been detected by XRD, but they could occur at the base of Unit 3 where TIC content reaches the highest in the sequence (1 %). Ca content in Unit 3 is not associated to carbonates (TIC values 0-0.4 %) and it could reflect Ca-bearing organic compounds formed during diagenesis in the peaty environment (Zaccone et al, 2007). Two subunits can be recognized in core RAR3 attending to changes in lithology, textural features and sedimentary discontinuities (Fig.…”

Section: Unit 3 (89 -42 Cal Kyr Bp)mentioning

confidence: 99%

Glacial to Holocene climate changes in the SE Pacific. The Raraku Lake sedimentary record (Easter Island, 27°S)

Sáez

Garcés

Giralt

et al. 2009

Quaternary Science Reviews

118

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Easter Island (SE Pacific, 27ºS) provides a unique opportunity to reconstruct past climate changes in the South Pacific region based on terrestrial archives. Climates in the mid-to lowlatitude region of the eastern South Pacific Ocean are controlled by fluctuations in the Westerlies winds, the South Pacific Convergence Zone and the South Pacific Anticyclone. Here we present a high-resolution reconstruction of lake dynamics, watershed processes and paleohydrology for the last 34000 years based on a sedimentological and geochemical multiproxy study of 8 cores from the Raraku Lake sediments constrained by 22 AMS radiocarbon dates. This multicore strategy has reconstructed the sedimentary architecture of the lake infilling and provided a stratigraphic framework to integrate and correlate previous core and vegetation studies conducted in the lake.High lake levels and clastic input dominated sedimentation in Raraku Lake between 34 to 28 cal kyr BP. Sedimentological and geochemical evidences support previously reported pollen datashowing a relatively open forest in the watershed during the Glacial period and a cold and relatively humid climate. Between 28 and 17.3 cal kyr BP, including the LGM period, colder conditions contributed to a reduction of the tree coverage in the island. The end of Glacial Period occurred at 17.3 cal kyr BP and was characterized by a sharp decrease in lake level conducive to the The main aim of the manuscript that we are submitting to Quaternary Science Reviews is to provide new insights about the environmental and climate evolution of Easter Island during the last 34000 cal years BP. We have achieved this aim through the high resolution study of new eight cores recovered in March 2006 at Lake Raraku and constrained by 22 AMS radiocarbon dates. This is the first time that a multicore strategy coupled with sedimentological, mineralogical and geochemical techniques are applied to Raraku Lake. As a result, we have been able to reconstruct the architecture of the lake sedimentary infilling and the limnological evolution of the lake. The reconstructed changes in terrigenous input, lake productivity, and lake level changes from Last Glacial to the present have been integrated with previous studies and the available pollen records to provide a paleoclimate reconstruction of the mid-to low-latitude southeastern Pacific region. The timing and characteristics of the main temperature and moisture changes in Easter Island show similarities with other terrestrial and marine records located in the south circum Pacific region. Moreover, our research provides new data on the impact in the lake ecosystem of human activities (deforestation and intensive cattle farming) during the last centuries.We suggest following reviewers because they are the main specialists in the topic of the manuscript: Mark

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Enrichment and depletion of major and trace elements, and radionuclides in ombrotrophic raw peat and corresponding humic acids

Cited by 54 publications

References 30 publications

Highly Organic Soils as “Witnesses” of Anthropogenic Pb, Cu, Zn, and 137Cs Inputs During Centuries

Highly Organic Soils as “Witnesses” of Anthropogenic Pb, Cu, Zn, and 137Cs Inputs During Centuries

Elemental composition of peat profiles in western Siberia: Effect of the micro-landscape, latitude position and permafrost coverage

Glacial to Holocene climate changes in the SE Pacific. The Raraku Lake sedimentary record (Easter Island, 27°S)

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