Grain Size, Mineralogy and Geochemistry in Late Quaternary Sediments from the Western Ross Sea outer Slope as Proxies for Climate Changes

Pistolato, Mario; Quaia, Tullio; Marinoni, Luigi; Vitturi, L. Menegazzo; Salvi, Cristinamaria; Salvi, Gianguido; Setti, Massimo; Brambati, A.

doi:10.1007/3-540-32934-x_54

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…The cold stages are characterized by high abundances of total organic carbon (Melles et al, , 2012, LOI (Fig. 6), and a higher clay content, suggesting that Cr and Ni might be absorbed by either organic matter (e.g., Sharma et al, 2004) or clay minerals (e.g., Das and Haake, 2003;Pistolato et al, 2006). Geochemical analysis of surface sediments from the lake indicates that the main source of Cr and Ni is linked to weathering products of basalts and andesite basalts found along the southern shore of Lake El'gygytgyn (Wennrich et al, 2013a).…”

Section: Cr Nimentioning

confidence: 99%

Inorganic geochemistry data from Lake El'gygytgyn sediments: marine isotope stages 6–11

Minyuk¹,

Borkhodoev²,

Wennrich

2014

Clim. Past

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Abstract. Geochemical analyses were performed on sediments recovered by deep drilling at Lake El'gygytgyn in central Chukotka, northeastern Russia (67 • 30 N; 172 • 05 E). Major and rare element concentrations were determined using X-ray fluorescence spectroscopy (XRF) on the < 250 µm fraction from 617 samples dated to ca. 440 and 125 ka, which approximates marine isotope stages (MIS) 11 to 6. The inorganic geochemistry indicates significant variations in elemental composition between glaciations and interglaciations. Interglacial sediments are characterized by high contents of SiO 2 , Na 2 O, CaO, K 2 O, and Sr and are depleted in Al 2 O 3 , Fe 2 O 3 , TiO 2 , and MgO. An extreme SiO 2 enrichment during MIS 11.3 and 9.3 was caused by an enhanced flux of biogenic silica (BSi). The geochemical structure of MIS 11 shows similar characteristics as seen in MIS 11 records from Lake Baikal (southeastern Siberia) and Antarctic ice cores, thereby arguing for the influence of global forcings on these records. High sediment content of TiO 2 , Fe 2 O 3 , MgO, Al 2 O 3 , LOI, Ni, Cr, and Zr typifies glacial stages, with the most marked increases during MIS 7.4 and 6.6. Reducing conditions during glacial times are indicated by peaks in the Fe 2 O 3 content and coinciding low Fe 2 O 3 /MnO ratios. This conclusion also is supported by P 2 O 5 and MnO enrichment, indicating an increased abundance of authigenic, fine-grained vivianite. Elemental ratios (CIA, CIW, PIA, and Rb/Sr) indicate that glacial sediments are depleted in mobile elements, like Na, Ca, K and Sr. This depletion was caused by changes in the sedimentation regime and thus reflects environmental changes.

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Section: Cr Nimentioning

confidence: 99%

Inorganic geochemistry data from Lake El'gygytgyn sediments: marine isotope stages 6–11

Minyuk¹,

Borkhodoev²,

Wennrich

2014

Clim. Past

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“…Hence, these grains can be used to decipher the past changes in basin shape and size (Olsen 1990;Henderson and Last 1998), and paleoclimatic oscillations within the catchment area (Menking 1997;Schütt 1998). In colder regions, quartz is one of the few important detrital minerals, which has been successfully used to reconstruct the past climatic changes, because of their response to physical weathering processes (Chamley 1989;Pistolato et al 2006). Quartz grains have higher preservation potential due to their resistance to weathering compared to any other predominantly available minerals present in the lake sediments (Krinsley and Doornkamp 1973;Mahaney 1995Mahaney , 2002.…”

Section: Introductionmentioning

confidence: 99%

Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures

Mazumder¹,

Govil²,

Kar³

et al. 2017

Polish Polar Research

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This paper provides an overview of the results of research on changes in ground temperature down to 50 cm depth, on the Kaffiøyra Plain, Spitsbergen in the summer seasons. To achieve this, measurement data were analysed from three different ecotopes (CALM Site P2A, P2B and P2C) -a beach, a moraine and tundra -collected during 22 polar expeditions between 1975 and 2014. To ensure comparability, data sets for the common period from 21 July to 31 August (referred to as the "summer season" further in the text) were analysed. The greatest influence on temperature across the inves− tigated ground layers comes from air temperature (correlation coefficients ranging from 0.61 to 0.84). For the purpose of the analysis of the changes in ground temperature in the years 1975-2014, missing data for certain summer seasons were reconstructed on the ba− sis of similar data from a meteorological station at Ny−Ålesund. The ground temperature at the Beach site demonstrated a statistically−significant growing trend: at depths from 1 to 10 cm the temperature increased by 0.27-0.28°C per decade, and from 20 to 50 cm by as much as 0.30°C per decade. On the Kaffiøyra Plain, the North Atlantic Oscillation (NAO) has a greater influence on the ground and air temperature than the Arctic Oscilla− tion (AO).

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“…In fact, other cases of smectite findings in post Oligocene sediments refer to phillosilicates of detrital origin (e.g. Pistolato et al, 2006). In this view, authigenic smectites and mineral precipitation in the RHT should have occurred before the shift toward exclusive physical weathering conditions.…”

Section: Discussionmentioning

confidence: 86%

The Ricker Hills Tillite provides evidence of Oligocene warm-based glaciation in Victoria Land, Antarctica

Baroni

Fasano

Giorgetti

et al. 2008

Global and Planetary Change

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Grain Size, Mineralogy and Geochemistry in Late Quaternary Sediments from the Western Ross Sea outer Slope as Proxies for Climate Changes

Cited by 9 publications

References 11 publications

Inorganic geochemistry data from Lake El'gygytgyn sediments: marine isotope stages 6–11

Inorganic geochemistry data from Lake El'gygytgyn sediments: marine isotope stages 6–11

Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures

The Ricker Hills Tillite provides evidence of Oligocene warm-based glaciation in Victoria Land, Antarctica

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