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  • Data  (9)
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  • 1
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    Table 1. Radiocarbon dates of carbonates from a bulk sediment sample of core Lz1023, East Lake Bonney (2011)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, dated; Age, dated material; Age, dated standard deviation; Carbon mass; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lake Bonney, East Antarctica; Lz1023-1; PC; Piston corer; Sample code/label; Sampling/drilling in lake; TaylorValley2002; δ13C
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
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  • 2
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    Sedimentology on East Lake Bonney core Lz1023-1 (2009)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Atomic absorption spectrometry (AAS), AA6800 (Shimadzu Corp.); Calculated; Calculated from weight/volume; Carbon, inorganic, total; Carbon, organic, total; Carbon, total; Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III; Chlorine; Clastics; Counting; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DIMATOC 100 analyzer (Dimatec Corp.); Grain size, CILAS 1180 Laser Particle Analyser; Ion chromatograph, Dionex Corporation, DX-120; Lake Bonney, East Antarctica; Lz1023-1; Nitrogen, total; PC; Piston corer; Potassium; Salt content; Sampling/drilling in lake; Size fraction 〈 0.002 mm, clay; Size fraction 〉 0.063 mm, sand; Size fraction 〉 2 mm, gravel; Size fraction 0.063-0.002 mm, silt, mud; Sodium; Sodium/Chlorine ratio; Sulfur, total; TaylorValley2002; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 653 data points
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  • 3
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    Fig. 3. Lithology and sedimentology on profile Lz1020 (2012)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Amphibole/standard ratio; Carbon, inorganic, total; Carbon, organic, total; COMPCORE; Composite Core; Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Feldspar/standard ratio; Lake Hoare, Taylor Valley, East Antarctica; Lz1020; Nitrogen, total; Pyroxene/standard ratio; Quartz/standard ratio; Sampling/drilling in lake; Sand; Silt; Size fraction 〈 0.002 mm, clay; Size fraction 〉 2 mm, gravel; Sulfur, total; TaylorValley2002; Total dissolved solids, corrected; Volcanic glass
    Type: Dataset
    Format: text/tab-separated-values, 1529 data points
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  • 4
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    Table 1: Radiocarbon dates from bulk sediment samples of core Lz1021, Fryxell basin (2011)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, dated; Age, dated material; Age, dated standard deviation; Calendar age; Calendar age, standard deviation; Carbon mass; Corrected; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; GC; Gravity corer; Lake Fryxell, East Antarctica; Lz1021-1; Lz1021-2; Lz1021-3; Lz1021-4; Lz1021-5; Lz1021-6; Lz1021-7; PC; Piston corer; Sample code/label; Sample mass; Sampling/drilling in lake; TaylorValley2002; δ13C
    Type: Dataset
    Format: text/tab-separated-values, 321 data points
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  • 5
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    Sedimentology on profile Lz1021 (2011)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; Amphibole/standard ratio; Carbon, inorganic, total; Carbon, organic, total; Carbon, organic total/Sulfur, total, ratio; Density; DEPTH, sediment/rock; Feldspar/standard ratio; Lake Fryxell, East Antarctica; Lz1021; Magnetic susceptibility, volume; Nitrogen, total; PC; Piston corer; Pyroxene/standard ratio; Quartz/standard ratio; Sampling/drilling in lake; Sand; Silt; Size fraction 〈 0.002 mm, clay; Size fraction 〉 2 mm, gravel; Sulfur, total; TaylorValley2002; Volcanic glass; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 3255 data points
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  • 6
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    Table I. Radiocarbon dates of the humic acid free fraction (HAF), and the humic acid fraction (HA) from bulk sediment samples of cores Lz1020, Lake Hoare (2011)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, dated; Age, dated material; Age, dated standard deviation; Carbon mass; COMPCORE; Composite Core; Core section label; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lake Hoare, Taylor Valley, East Antarctica; Lz1020; Sample code/label; Sampling/drilling in lake; TaylorValley2002; δ13C
    Type: Dataset
    Format: text/tab-separated-values, 235 data points
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  • 7
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    Sedimentology and age on profile Lz1023 (2011)
    PANGAEA
    In:  Supplement to: Wagner, Bernd; Ortlepp, Sabrina; Kenig, Fabien; Doran, Peter T; Melles, Martin (2010): Palaeoenvironmental implications derived from a piston core from east lobe Bonney, Taylor Valley, Antarctica. Antarctic Science, 22(5), 522-530, https://doi.org/10.1017/S0954102010000556
    Details
    Publication Date: 2023-10-28
    Description: A 270 cm long sediment sequence was recovered with a piston corer from east lobe Bonney, Taylor Valley, Antarctica, and characterized according to its sedimentological, mineralogical, and geochemical properties. It is the first record of such length recovered from east lobe Bonney. The sediment core is mainly composed of halite crystals of different sizes, water, and a relatively low and stable proportion of clastic particles. Although the sediment surface was probably disturbed by the coring process and absence or low contents of organic material or carbonates hampers the establishment of a robust chronology by radiocarbon dating, the core probably contains at least several hundred years of information about the history of the lake and the Bonney basin. Variations in halite crystal sizes and amount as well as variations in the composition of clastic material can be related to past lake level changes and evaporation cycles.
    Keywords: Lake Bonney, East Antarctica; Lz1023-1; PC; Piston corer; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Sampling/drilling in lake; SPP1158; TaylorValley2002
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
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    Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica (2012)
    PANGAEA
    In:  Supplement to: Wagner, Bernd; Ortlepp, Sabrina; Doran, Peter T; Kenig, Fabien; Melles, Martin; Burkemper, Andy (2011): The Holocene environmental history of Lake Hoare, Taylor Valley, Antarctica, reconstructed from sediment cores. Antarctic Science, 23(3), 307-319, https://doi.org/10.1017/S0954102011000125
    Details
    Publication Date: 2023-10-28
    Description: Up to 2.3 m long sediment sequences were recovered from the deepest part of Lake Hoare in Taylor Valley, southern Victoria Land, Antarctica. Sedimentological, biogeochemical, and mineralogical analyses revealed a high spatial variability of these parameters in Lake Hoare. Five distinct lithological units were recognized. Radiocarbon dating of bulk organic carbon samples from the sediment sequences yielded apparently too old ages and significant age reversals, which prevented the establishment of reliable age-depth models. However, cross correlation of the sedimentary characteristics with those of sediment records from neighbouring Lake Fryxell indicates that the lowermost two units of the Lake Hoare sediment sequences were probably deposited during the final phase of proglacial Lake Washburn, which occupied Taylor Valley during the late Pleistocene and early Holocene. High amounts of angular gravel and the absence of fine-grained material imply a complete desiccation with subaerial conditions in the Lake Hoare basin in the middle of the Holocene. The late Holocene (〈 c. 3300 calendar yr BP) is characterized by the establishment of environmental conditions similar to those existing today. A late Holocene desiccation event, such as proposed in former studies, is not indicated in the sediment sequences recovered.
    Keywords: COMPCORE; Composite Core; Lake Hoare, Taylor Valley, East Antarctica; Lz1020; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Sampling/drilling in lake; SPP1158; TaylorValley2002
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
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    Age determination and sedimentology on profile Lz1021 (2011)
    PANGAEA
    In:  Supplement to: Wagner, Bernd; Melles, Martin; Doran, Peter T; Kenig, Fabien; Forman, Steven L; Pierau, Roberto; Allen, Phillip (2006): Glacial and postglacial sedimentation in the Fryxell basin, Taylor Valley, southern Victoria Land, Antarctica. Palaeogeography, Palaeoclimatology, Palaeoecology, 241, 320-337, https://doi.org/10.1016/j.palaeo.2006.04.003
    Details
    Publication Date: 2023-10-28
    Description: A 9.14 m long sediment sequence was recovered from Lake Fryxell, Taylor Valley, southern Victoria Land, Antarctica, and investigated for its chronology and sedimentological, mineralogical, and biogeochemical changes. The basal part of the sequence is dominated by coarse clastic matter, i.e., mainly sand. The sediment composition suggests that a lake existed in Fryxell basin during the Middle Weichselian by ca. 48,000 cal. year BP. After a short period of lake-level lowstand ca. 43,000 cal. year BP, lower Taylor Valley became occupied by the proglacial Lake Washburn, which was at least partly supplied by meltwater and sediments from the Ross Ice Sheet that was advanced to the mouth of Taylor Valley. Evaporation of Lake Washburn to lower levels started during the Last Glacial Maximum at ca. 22,000 cal. year BP, long before the Ross Ice Sheet retreated significantly. Lake-level lowering was discontinuous with a series of high and low stands. From ca. 4000 cal. year BP environmental conditions were similar to those of today and lower Fryxell basin was occupied by a small lake. This lake evaporated to a saline or hypersaline pond between ca. 2500 and 1000 cal. year BP and refilled subsequently.
    Keywords: GC; Gravity corer; Lake Fryxell, East Antarctica; Lz1021; Lz1021-1; Lz1021-2; Lz1021-3; Lz1021-4; Lz1021-5; Lz1021-6; Lz1021-7; PC; Piston corer; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Sampling/drilling in lake; SPP1158; TaylorValley2002
    Type: Dataset
    Format: application/zip, 2 datasets
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