Sedimentology and age on profile Lz1023

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...

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Bibliographic Details
Main Authors: Wagner, Bernd, Ortlepp, Sabrina, Kenig, Fabien, Doran, Peter T, Melles, Martin
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
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
Antarctic
Arctic
Bonney
Taylor Valley
Antarc*
Antarctic Science
Antarctica
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.759515
https://doi.org/10.1594/PANGAEA.759515
Description
Summary: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.

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