Composition of sedimentary material from the bottom and the area surrounding the Lake Untersee, East Antarctica

This paper presents data on geographic and geologic conditions of modern sedimentation in the Lake Untersee, the largest lake in the East Antarctica. Geochemical and sedimentation data indicate that the leading mechanism supplying aluminosilicate sedimentary material to the surface layer of bottom s...

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Bibliographic Details
Main Authors: Levitan, Mikhail A, Girin, Yury P, Luksha, V L, Kubrakova, I V, Roshchina, I A, Sattler, Birgit, Tyutyunnik, O A, Chudetsky, MYu
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Archive of Ocean Data
ARCOD
Anuchin Glacier
East Antarctica
Untersee
Antarc*
Antarctica
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.811555
https://doi.org/10.1594/PANGAEA.811555
Description
Summary:This paper presents data on geographic and geologic conditions of modern sedimentation in the Lake Untersee, the largest lake in the East Antarctica. Geochemical and sedimentation data indicate that the leading mechanism supplying aluminosilicate sedimentary material to the surface layer of bottom sediments is seasonal melting of the Anuchin glacier and the mountain glacier on the southeastern part of the valley hosting the lake. Strongly reduced conditions in the lowermost 25 m of the water column in the smaller of two depressions of the lake bottom were favorable for enrichment of the bottom sediments in bacteriogenic organic matter, Mo, Au, and Pd. H2S-contaminated water results to significant enrichment of the sediments only in redox-sensitive elements that are able to migrate in anionic complexes and precipitate (co-precipitate) as sulfides.

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