Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka
A widespread platinum (Pt) anomaly was recently documented in Greenland ice and 11 North American sedimentary sequences at the onset of the Younger Dryas (YD) event (~12,800-‰cal-‰yr BP), consistent with the YD Impact Hypothesis. We report high-resolution analyses of a 1-meter section of a lake core...
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ftunivnorthcag:oai:libres.uncg.edu/34569 2024-10-29T17:44:25+00:00 Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka Moore, Christopher R.,Brooks,Mark J.,Goodyear,Albert C.,Ferguson,Terr NC DOCKS at East Carolina University 2019 http://libres.uncg.edu/ir/ecu/f/0000-embargo-holder.txt English eng 2019 ftunivnorthcag 2024-10-08T15:22:15Z A widespread platinum (Pt) anomaly was recently documented in Greenland ice and 11 North American sedimentary sequences at the onset of the Younger Dryas (YD) event (~12,800-‰cal-‰yr BP), consistent with the YD Impact Hypothesis. We report high-resolution analyses of a 1-meter section of a lake core from White Pond, South Carolina, USA. After developing a Bayesian age-depth model that brackets the late Pleistocene through early Holocene, we analyzed and quantified the following: (1) Pt and palladium (Pd) abundance, (2) geochemistry of 58 elements, (3) coprophilous spores, (4) sedimentary organic matter (OC and sedaDNA), (5) stable isotopes of C (δ13C) and N (δ15N), (6) soot, (7) aciniform carbon, (8) cryptotephra, (9) mercury (Hg), and (10) magnetic susceptibility. We identified large Pt and Pt/Pd anomalies within a 2-cm section dated to the YD onset (12,785-‰Â±-‰58-‰cal-‰yr BP). These anomalies precede a decline in coprophilous spores and correlate with an abrupt peak in soot and C/OC ratios, indicative of large-scale regional biomass burning. We also observed a relatively large excursion in δ15N values, indicating rapid climatic and environmental/hydrological changes at the YD onset. Our results are consistent with the YD Impact Hypothesis and impact-related environmental and ecological changes. Other/Unknown Material Greenland University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) Carbon Peak ENVELOPE(-122.636,-122.636,56.050,56.050) Greenland White Pond ENVELOPE(-62.857,-62.857,82.452,82.452) |
institution |
Open Polar |
collection |
University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) |
op_collection_id |
ftunivnorthcag |
language |
English |
description |
A widespread platinum (Pt) anomaly was recently documented in Greenland ice and 11 North American sedimentary sequences at the onset of the Younger Dryas (YD) event (~12,800-‰cal-‰yr BP), consistent with the YD Impact Hypothesis. We report high-resolution analyses of a 1-meter section of a lake core from White Pond, South Carolina, USA. After developing a Bayesian age-depth model that brackets the late Pleistocene through early Holocene, we analyzed and quantified the following: (1) Pt and palladium (Pd) abundance, (2) geochemistry of 58 elements, (3) coprophilous spores, (4) sedimentary organic matter (OC and sedaDNA), (5) stable isotopes of C (δ13C) and N (δ15N), (6) soot, (7) aciniform carbon, (8) cryptotephra, (9) mercury (Hg), and (10) magnetic susceptibility. We identified large Pt and Pt/Pd anomalies within a 2-cm section dated to the YD onset (12,785-‰Â±-‰58-‰cal-‰yr BP). These anomalies precede a decline in coprophilous spores and correlate with an abrupt peak in soot and C/OC ratios, indicative of large-scale regional biomass burning. We also observed a relatively large excursion in δ15N values, indicating rapid climatic and environmental/hydrological changes at the YD onset. Our results are consistent with the YD Impact Hypothesis and impact-related environmental and ecological changes. |
author |
Moore, Christopher R.,Brooks,Mark J.,Goodyear,Albert C.,Ferguson,Terr NC DOCKS at East Carolina University |
spellingShingle |
Moore, Christopher R.,Brooks,Mark J.,Goodyear,Albert C.,Ferguson,Terr NC DOCKS at East Carolina University Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka |
author_facet |
Moore, Christopher R.,Brooks,Mark J.,Goodyear,Albert C.,Ferguson,Terr NC DOCKS at East Carolina University |
author_sort |
Moore, Christopher R.,Brooks,Mark J.,Goodyear,Albert C.,Ferguson,Terr |
title |
Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka |
title_short |
Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka |
title_full |
Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka |
title_fullStr |
Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka |
title_full_unstemmed |
Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka |
title_sort |
sediment cores from white pond, south carolina, contain a platinum anomaly, pyrogenic carbon peak, and coprophilous spore decline at 12.8 ka |
publishDate |
2019 |
url |
http://libres.uncg.edu/ir/ecu/f/0000-embargo-holder.txt |
long_lat |
ENVELOPE(-122.636,-122.636,56.050,56.050) ENVELOPE(-62.857,-62.857,82.452,82.452) |
geographic |
Carbon Peak Greenland White Pond |
geographic_facet |
Carbon Peak Greenland White Pond |
genre |
Greenland |
genre_facet |
Greenland |
_version_ |
1814273759718146048 |