Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network.
A 40.32 m piston core recovered from Effingham Inlet, on the west coast of Vancouver Island, provides the basis for a high-resolution geochemical study of the last deglaciation and the Holocene. Glacial retreat, basin isolation, sea-level rise, and productivity variations are determined using proxie...
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crcansciencepubl:10.1139/e08-030 2024-09-15T18:10:04+00:00 Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. Ivanochko, Tara S. Calvert, Stephen E. Southon, John R. Enkin, Randolph J. Baker, Judith Dallimore, Audrey Pedersen, Thomas F. Hollings, Pete 2008 http://dx.doi.org/10.1139/e08-030 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E08-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/E08-030 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 45, issue 11, page 1331-1344 ISSN 0008-4077 1480-3313 journal-article 2008 crcansciencepubl https://doi.org/10.1139/e08-030 2024-07-25T04:10:07Z A 40.32 m piston core recovered from Effingham Inlet, on the west coast of Vancouver Island, provides the basis for a high-resolution geochemical study of the last deglaciation and the Holocene. Glacial retreat, basin isolation, sea-level rise, and productivity variations are determined using proxies for sediment composition (K/Al, Fe/Al, Mg/Al), grain size (Ti/Al, Zr/Al), sedimentary redox conditions (Mo/Al, U/Al), and productivity (wt.% organic carbon, wt.% opal). As local ice retreated and marine waters inundated the basin, coarse-grained glacimarine sediments were replaced by finer grained, laminated, opal-rich sediments. During meltwater pulse-1a, the dominance of local crustal rise over eustatic sea-level rise resulted in the progressive restriction of ocean circulation in Effingham Inlet and the formation of a temporary freshwater lake. The transition into stable Holocene conditions was initiated at ∼12 700 BP, which corresponds to the onset of the Younger Dryas, as identified by the Greenland Ice core Project (GRIP) ice core δ 18 O record and was completed by 10 700 BP, ∼800 years after the GRIP ice core record stabilized. Holocene Mo/Al and U/Al ratios range between 12–35 (×10 4 ) and 1–3.4 (×10 4 ), respectively, indicating that although large-amplitude, high-frequency fluctuations occur, the sediments of Effingham Inlet inner basin have remained organic rich and oxygen depleted for the entire Holocene period. The combination of anoxic bottom waters and a Holocene sedimentation rate of 217 cm/ka have preserved a high-resolution record of environmental change in the northeast Pacific over the last 11 000 years. Article in Journal/Newspaper Greenland Greenland ice core Greenland Ice core Project GRIP ice core Canadian Science Publishing Canadian Journal of Earth Sciences 45 11 1331 1344 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
A 40.32 m piston core recovered from Effingham Inlet, on the west coast of Vancouver Island, provides the basis for a high-resolution geochemical study of the last deglaciation and the Holocene. Glacial retreat, basin isolation, sea-level rise, and productivity variations are determined using proxies for sediment composition (K/Al, Fe/Al, Mg/Al), grain size (Ti/Al, Zr/Al), sedimentary redox conditions (Mo/Al, U/Al), and productivity (wt.% organic carbon, wt.% opal). As local ice retreated and marine waters inundated the basin, coarse-grained glacimarine sediments were replaced by finer grained, laminated, opal-rich sediments. During meltwater pulse-1a, the dominance of local crustal rise over eustatic sea-level rise resulted in the progressive restriction of ocean circulation in Effingham Inlet and the formation of a temporary freshwater lake. The transition into stable Holocene conditions was initiated at ∼12 700 BP, which corresponds to the onset of the Younger Dryas, as identified by the Greenland Ice core Project (GRIP) ice core δ 18 O record and was completed by 10 700 BP, ∼800 years after the GRIP ice core record stabilized. Holocene Mo/Al and U/Al ratios range between 12–35 (×10 4 ) and 1–3.4 (×10 4 ), respectively, indicating that although large-amplitude, high-frequency fluctuations occur, the sediments of Effingham Inlet inner basin have remained organic rich and oxygen depleted for the entire Holocene period. The combination of anoxic bottom waters and a Holocene sedimentation rate of 217 cm/ka have preserved a high-resolution record of environmental change in the northeast Pacific over the last 11 000 years. |
author2 |
Hollings, Pete |
format |
Article in Journal/Newspaper |
author |
Ivanochko, Tara S. Calvert, Stephen E. Southon, John R. Enkin, Randolph J. Baker, Judith Dallimore, Audrey Pedersen, Thomas F. |
spellingShingle |
Ivanochko, Tara S. Calvert, Stephen E. Southon, John R. Enkin, Randolph J. Baker, Judith Dallimore, Audrey Pedersen, Thomas F. Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. |
author_facet |
Ivanochko, Tara S. Calvert, Stephen E. Southon, John R. Enkin, Randolph J. Baker, Judith Dallimore, Audrey Pedersen, Thomas F. |
author_sort |
Ivanochko, Tara S. |
title |
Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. |
title_short |
Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. |
title_full |
Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. |
title_fullStr |
Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. |
title_full_unstemmed |
Determining the post-glacial evolution of a northeast Pacific coastal fjord using a multiproxy geochemical approachThis article is one of a series of papers published in this Special Issue on the theme Polar Climate Stability Network. |
title_sort |
determining the post-glacial evolution of a northeast pacific coastal fjord using a multiproxy geochemical approachthis article is one of a series of papers published in this special issue on the theme polar climate stability network. |
publisher |
Canadian Science Publishing |
publishDate |
2008 |
url |
http://dx.doi.org/10.1139/e08-030 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E08-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/E08-030 |
genre |
Greenland Greenland ice core Greenland Ice core Project GRIP ice core |
genre_facet |
Greenland Greenland ice core Greenland Ice core Project GRIP ice core |
op_source |
Canadian Journal of Earth Sciences volume 45, issue 11, page 1331-1344 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e08-030 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
45 |
container_issue |
11 |
container_start_page |
1331 |
op_container_end_page |
1344 |
_version_ |
1810447663888334848 |