Huang, Huang; Frank, Martin (2025): Pleistocene Pb isotope records of crust Haxby from PS75/247-2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984536
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Published: 2025-08-26 • DOI registered: 2025-09-24
Abstract:
Lead (Pb) isotope measurements are performed in the ferromanganese crust PS75/247-2, dredged on the southern flank of Haxby Seamount in the Pacific sector of the SO. We apply laser ablation coupled with multiple-collector inductively coupled plasma mass spectrometry (LA-MC-ICPMS) and two-dimensional (2D) mapping techniques. This combined novel approach enables us to confidently resolve orbital Pb isotope variations for the past 800 ka.
Pb isotope is a sensitive water mass tracer and our results reveal systematically higher 208Pb/206Pb ratios during lukewarm interglacials than during more recent interglacials while 206Pb/204Pb ratios remained similar, suggesting reduced vertical deep-water mixing in the Southern Ocean during lukewarm interglacials. By enhancing deep-sea carbon sequestration and thereby lowering atmospheric CO2, strengthened deep Southern Ocean stratification likely imposed critical impacts on the lukewarm interglacial climates.
Supplement to:
Huang, Huang; Fietzke, Jan; Gutjahr, Marcus; Frank, Martin; Kuhn, Gerhard; Zhang, Xu; Hillenbrand, Claus-Dieter; Li, Dengfeng; Hu, Jingyan; Yu, Jimin (2025): Enhanced deep Southern Ocean stratification during the lukewarm interglacials. Nature Communications, 16(1), 8856, https://doi.org/10.1038/s41467-025-63938-6
Coverage:
Latitude: -69.142167 * Longitude: -123.218833
Date/Time Start: 2010-03-23T15:17:00 * Date/Time End: 2010-03-23T15:17:00
Minimum Elevation: -1734.0 m * Maximum Elevation: -1734.0 m
Event(s):
PS75/247-2 * Latitude: -69.142167 * Longitude: -123.218833 * Date/Time: 2010-03-23T15:17:00 * Elevation: -1734.0 m * Location: Haxby Seamount (Marie Byrd Seamounts) * Campaign: ANT-XXVI/3 (PS75) * Basis: Polarstern * Method/Device: Dredge (DRG) * Comment: 1 box with corals, 1 box with rocks, 1 bag with living corals (frozen at -80 C)
Comment:
Lead (Pb) isotope measurements are performed in the ferromanganese crust PS75/247-2, dredged from Haxby Seamount, Amundsen Sea, from a water depth of 1502-1734 m .
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Age, dated | Age dated | ka | Huang, Huang | ||
| 2 | Lead-208/Lead-206 ratio | 208Pb/206Pb | Huang, Huang | Multicollector-inductively coupled plasma mass spectrometer (MC-ICPMS) | ||
| 3 | Lead-206/Lead-204 ratio | 206Pb/204Pb | Huang, Huang | Multicollector-inductively coupled plasma mass spectrometer (MC-ICPMS) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
6615 data points
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