A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach
We present a new palaeoenvironmental record of hydrological variability in Lake Baikal, based on re-modelled δ18Odiatom values of diatom silica (δ18Omodelled), where the residual contaminants are identified and compensated for using electron optical imaging and whole-sample geochemistry. δ18Omodelle...
Published in: | Journal of Quaternary Science |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/15185/ http://onlinelibrary.wiley.com/doi/10.1002/jqs.1484/abstract |
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ftnerc:oai:nora.nerc.ac.uk:15185 2023-05-15T17:32:45+02:00 A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach Mackay, Anson W. Swann, George E.A. Brewer, Tim S. Leng, Melanie J. Morley, David W. Piotrowska, Natalia Rioual, Patrick White, Dustin 2011 http://nora.nerc.ac.uk/id/eprint/15185/ http://onlinelibrary.wiley.com/doi/10.1002/jqs.1484/abstract unknown Wiley Mackay, Anson W.; Swann, George E.A.; Brewer, Tim S.; Leng, Melanie J. orcid:0000-0003-1115-5166 Morley, David W.; Piotrowska, Natalia; Rioual, Patrick; White, Dustin. 2011 A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach. Journal of Quaternary Science, 26 (6). 627-634. https://doi.org/10.1002/jqs.1484 <https://doi.org/10.1002/jqs.1484> Publication - Article PeerReviewed 2011 ftnerc https://doi.org/10.1002/jqs.1484 2023-02-04T19:29:44Z We present a new palaeoenvironmental record of hydrological variability in Lake Baikal, based on re-modelled δ18Odiatom values of diatom silica (δ18Omodelled), where the residual contaminants are identified and compensated for using electron optical imaging and whole-sample geochemistry. δ18Omodelled interpretations are based on the balance between rivers with high δ18O values and rivers with low δ18O values. Isotopic variability is related to latitudinal differences in precipitation which feed these rivers. The δ18Omodelled record suggests that rather moist conditions prevailed in the Lake Baikal region during the latter stages of the Younger Dryas. Throughout the Holocene, episodes of low δ18Omodelled values are, in general, in good agreement with increases in percentage haematite-stained grains in North Atlantic sediments (indicative of ice-rafted debris events). Rivers with southerly catchments dominate fluvial input especially between c. 3.3 and 2 cal ka BP, concurrent with high precipitation in the Lake Baikal region. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Journal of Quaternary Science 26 6 627 634 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
We present a new palaeoenvironmental record of hydrological variability in Lake Baikal, based on re-modelled δ18Odiatom values of diatom silica (δ18Omodelled), where the residual contaminants are identified and compensated for using electron optical imaging and whole-sample geochemistry. δ18Omodelled interpretations are based on the balance between rivers with high δ18O values and rivers with low δ18O values. Isotopic variability is related to latitudinal differences in precipitation which feed these rivers. The δ18Omodelled record suggests that rather moist conditions prevailed in the Lake Baikal region during the latter stages of the Younger Dryas. Throughout the Holocene, episodes of low δ18Omodelled values are, in general, in good agreement with increases in percentage haematite-stained grains in North Atlantic sediments (indicative of ice-rafted debris events). Rivers with southerly catchments dominate fluvial input especially between c. 3.3 and 2 cal ka BP, concurrent with high precipitation in the Lake Baikal region. |
format |
Article in Journal/Newspaper |
author |
Mackay, Anson W. Swann, George E.A. Brewer, Tim S. Leng, Melanie J. Morley, David W. Piotrowska, Natalia Rioual, Patrick White, Dustin |
spellingShingle |
Mackay, Anson W. Swann, George E.A. Brewer, Tim S. Leng, Melanie J. Morley, David W. Piotrowska, Natalia Rioual, Patrick White, Dustin A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach |
author_facet |
Mackay, Anson W. Swann, George E.A. Brewer, Tim S. Leng, Melanie J. Morley, David W. Piotrowska, Natalia Rioual, Patrick White, Dustin |
author_sort |
Mackay, Anson W. |
title |
A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach |
title_short |
A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach |
title_full |
A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach |
title_fullStr |
A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach |
title_full_unstemmed |
A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach |
title_sort |
reassessment of late glacial-holocene diatom oxygen isotope record from lake baikal using a geochemical mass-balance approach |
publisher |
Wiley |
publishDate |
2011 |
url |
http://nora.nerc.ac.uk/id/eprint/15185/ http://onlinelibrary.wiley.com/doi/10.1002/jqs.1484/abstract |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Mackay, Anson W.; Swann, George E.A.; Brewer, Tim S.; Leng, Melanie J. orcid:0000-0003-1115-5166 Morley, David W.; Piotrowska, Natalia; Rioual, Patrick; White, Dustin. 2011 A reassessment of late glacial-Holocene diatom oxygen isotope record from Lake Baikal using a geochemical mass-balance approach. Journal of Quaternary Science, 26 (6). 627-634. https://doi.org/10.1002/jqs.1484 <https://doi.org/10.1002/jqs.1484> |
op_doi |
https://doi.org/10.1002/jqs.1484 |
container_title |
Journal of Quaternary Science |
container_volume |
26 |
container_issue |
6 |
container_start_page |
627 |
op_container_end_page |
634 |
_version_ |
1766131017842688000 |