Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough
To improve the chronology of sediments containing information about Holocene ice shelf and oceanic dynamics in the vicinity of the Antarctic Peninsula, we compare bulk acid-insoluble radiocarbon dating to ramped pyrolysis 14C dating in a sediment core containing ample organic material. This core spa...
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Digital Commons @ University of South Florida
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-3435 2023-07-30T03:58:42+02:00 Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough Rosenheim, Brad E Santoro, Jennifer A Gunter, Madeleine Domack, Eugene W 2013-01-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/2451 https://doi.org/10.2458/azu_js_rc.v55i1.16234 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/2451 doi:10.2458/azu_js_rc.v55i1.16234 https://doi.org/10.2458/azu_js_rc.v55i1.16234 Marine Science Faculty Publications Life Sciences article 2013 ftusouthflorida https://doi.org/10.2458/azu_js_rc.v55i1.16234 2023-07-13T21:07:39Z To improve the chronology of sediments containing information about Holocene ice shelf and oceanic dynamics in the vicinity of the Antarctic Peninsula, we compare bulk acid-insoluble radiocarbon dating to ramped pyrolysis 14C dating in a sediment core containing ample organic material. This core spans the last 12,000 yr of open-shelf sedimentation in the Bellingshausen Sea, western Antarctic Peninsula. By estimating the spectrum of 14C ages within a given core horizon, the ramped pyrolysis 14C method separates organic carbon relative to thermal stability, isolating younger parts of the mixture from older ones and providing an estimate of the geological uncertainty inherent in a bulk 14C age. Employing the ramped pyrolysis 14C method to this core demonstrates variable bulk 14C age bias and increasing age spectrum downcore, neither of which can be associated with major changes in lithology of the core. The chronology of the sediment core using the youngest ages from the ramped pyrolysis technique allows for correlation between nearby Palmer Deep sediments and these sediments from the Hugo Island Trough. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Hugo Island Ice Shelf University of South Florida St. Petersburg: Digital USFSP Antarctic Antarctic Peninsula Bellingshausen Sea Hugo Island ENVELOPE(-65.750,-65.750,-64.950,-64.950) Palmer Deep ENVELOPE(-64.400,-64.400,-64.950,-64.950) The Antarctic Radiocarbon 55 1 115 126 |
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Open Polar |
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University of South Florida St. Petersburg: Digital USFSP |
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ftusouthflorida |
language |
unknown |
topic |
Life Sciences |
spellingShingle |
Life Sciences Rosenheim, Brad E Santoro, Jennifer A Gunter, Madeleine Domack, Eugene W Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough |
topic_facet |
Life Sciences |
description |
To improve the chronology of sediments containing information about Holocene ice shelf and oceanic dynamics in the vicinity of the Antarctic Peninsula, we compare bulk acid-insoluble radiocarbon dating to ramped pyrolysis 14C dating in a sediment core containing ample organic material. This core spans the last 12,000 yr of open-shelf sedimentation in the Bellingshausen Sea, western Antarctic Peninsula. By estimating the spectrum of 14C ages within a given core horizon, the ramped pyrolysis 14C method separates organic carbon relative to thermal stability, isolating younger parts of the mixture from older ones and providing an estimate of the geological uncertainty inherent in a bulk 14C age. Employing the ramped pyrolysis 14C method to this core demonstrates variable bulk 14C age bias and increasing age spectrum downcore, neither of which can be associated with major changes in lithology of the core. The chronology of the sediment core using the youngest ages from the ramped pyrolysis technique allows for correlation between nearby Palmer Deep sediments and these sediments from the Hugo Island Trough. |
format |
Article in Journal/Newspaper |
author |
Rosenheim, Brad E Santoro, Jennifer A Gunter, Madeleine Domack, Eugene W |
author_facet |
Rosenheim, Brad E Santoro, Jennifer A Gunter, Madeleine Domack, Eugene W |
author_sort |
Rosenheim, Brad E |
title |
Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough |
title_short |
Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough |
title_full |
Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough |
title_fullStr |
Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough |
title_full_unstemmed |
Improving Antarctic Sediment 14 C Dating Using Ramped Pyrolysis: An Example from the Hugo Island Trough |
title_sort |
improving antarctic sediment 14 c dating using ramped pyrolysis: an example from the hugo island trough |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2013 |
url |
https://digitalcommons.usf.edu/msc_facpub/2451 https://doi.org/10.2458/azu_js_rc.v55i1.16234 |
long_lat |
ENVELOPE(-65.750,-65.750,-64.950,-64.950) ENVELOPE(-64.400,-64.400,-64.950,-64.950) |
geographic |
Antarctic Antarctic Peninsula Bellingshausen Sea Hugo Island Palmer Deep The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bellingshausen Sea Hugo Island Palmer Deep The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Hugo Island Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Hugo Island Ice Shelf |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/2451 doi:10.2458/azu_js_rc.v55i1.16234 https://doi.org/10.2458/azu_js_rc.v55i1.16234 |
op_doi |
https://doi.org/10.2458/azu_js_rc.v55i1.16234 |
container_title |
Radiocarbon |
container_volume |
55 |
container_issue |
1 |
container_start_page |
115 |
op_container_end_page |
126 |
_version_ |
1772821450474913792 |