Imperial College London
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ProfessorMartinSiegert

Faculty of Natural Sciences, The Grantham Institute for Climate Change

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 9666m.siegert Website

 
 
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Assistant

 

Ms Gosia Gayer +44 (0)20 7594 9666

 
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Location

 

Grantham Directors OfficeSherfield BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Smith:2018:10.1016/j.epsl.2018.10.011,
author = {Smith, A and Woodward, J and Ross, N and Bentley, M and Hodgson, D and Siegert, M and King, E},
doi = {10.1016/j.epsl.2018.10.011},
journal = {Earth and Planetary Science Letters},
pages = {139--151},
title = {Evidence for the long-term sedimentary environment in an Antarctic subglacial lake},
url = {http://dx.doi.org/10.1016/j.epsl.2018.10.011},
volume = {504},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Lakes beneath the Antarctic Ice Sheet are of fundamental scientific interest for their ability to contain unique records of ice sheet history and microbial life in their sediments. However, no records of subglacial lake sedimentation have yet been acquired from beneath the interior of the ice sheet, and understanding of sediment pathways, processes and structure in subglacial lake environments remains uncertain. Here we present an analysis of seismic data from Subglacial Lake Ellsworth, showing that the lake bed comprises very fine-grained sediments deposited in a low energy environment, with low water- and sediment-fluxes. Minimum sediment thickness is 6 m, the result of prolonged low sedimentation rates. Based on the few available analogues, we speculate this sediment age range is a minimum of 150 ka, and possibly >1 Ma. Sediment mass movements have occurred, but they are rare and have been buried by subsequent sedimentation. We present a new conceptual model of subglacial lake sedimentation, allowing a framework for evaluating processes in subglacial lake environments, and for determining future lake access locations and interpreting subglacial lake samples.
AU  - Smith,A
AU  - Woodward,J
AU  - Ross,N
AU  - Bentley,M
AU  - Hodgson,D
AU  - Siegert,M
AU  - King,E
DO  - 10.1016/j.epsl.2018.10.011
EP  - 151
PY  - 2018///
SN  - 0012-821X
SP  - 139
TI  - Evidence for the long-term sedimentary environment in an Antarctic subglacial lake
T2  - Earth and Planetary Science Letters
UR  - http://dx.doi.org/10.1016/j.epsl.2018.10.011
UR  - http://hdl.handle.net/10044/1/65305
VL  - 504
ER  -
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