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Huang, Huang; Gutjahr, Marcus; Kuhn, Gerhard; Hathorne, Ed C; Eisenhauer, Anton (2020): Authigenic Pb and Nd isotope composition snapshot of surface sediments in the Atlantic sector of the Southern Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.924604

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Abstract:
Radiogenic lead (Pb) and neodymium (Nd) isotope compositions extracted from authigenic phases in marine sediments are sensitive tracers to reconstruct past ocean circulation and water mass mixing. Chemical reductive leaching of hydrogenetic ferromanganese oxyhydroxides from bulk sediments is the most practical way to recover past seawater Pb and Nd isotope signatures in the Southern Ocean, due to the scarcity of alternative archives. However, the leached signal could be compromised if substantial quantities of Pb and Nd were released from non-hydrogenetic sediment fractions during chemical extraction. We developed a very short 10-seconds leaching method to extract reliable seawater Pb and Nd isotope signals from sediments in the Atlantic sector of Southern Ocean. Based on this method, we extracted seawater Pb and Nd signals from 70 core top sediments covering different geological settings in the Atlantic sector of Southern Ocean collected by past Polarstern RV cruises to evaluate factor controlling the regional authigenic Pb and Nd isotopic composition variability.
Keyword(s):
Atlantic sector of Southern Ocean; Authigenic Pb and Nd; isotope compositions
Supplement to:
Huang, H; Gutjahr, Marcus; Kuhn, Gerhard; Hathorne, Ed C; Eisenhauer, Anton (2021): Efficient Extraction of Past Seawater Pb and Nd Isotope Signatures From Southern Ocean Sediments. Geochemistry, Geophysics, Geosystems, 22(3), https://doi.org/10.1029/2020GC009287
Related to:
Huang, Huang; Gutjahr, Marcus; Eisenhauer, Anton; Kuhn, Gerhard (2019): Authigenic PB isotope composition of surface sediments from the Southern Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.909079
Coverage:
Median Latitude: -67.653690 * Median Longitude: -18.834234 * South-bound Latitude: -77.653200 * West-bound Longitude: -62.167500 * North-bound Latitude: -49.013330 * East-bound Longitude: 15.031000
Date/Time Start: 1983-02-13T00:00:00 * Date/Time End: 2016-03-16T12:40:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 0.07 m
Event(s):
PS1010-1 (PS01/154) * Latitude: -77.241700 * Longitude: -34.540000 * Date/Time: 1983-02-13T00:00:00 * Elevation: -476.0 m * Penetration: 0.26 m * Recovery: 0.23 m * Location: Filchner Trough * Campaign: ANT-I/2 (PS01) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
PS1012-1 (PS01/156) * Latitude: -77.304500 * Longitude: -35.814500 * Date/Time: 1983-02-13T00:00:00 * Elevation: -1021.0 m * Penetration: 0.5 m * Recovery: 0.43 m * Location: Filchner Trough * Campaign: ANT-I/2 (PS01) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
PS1013-1 (PS01/161) * Latitude: -77.409200 * Longitude: -37.921800 * Date/Time: 1983-02-14T00:00:00 * Elevation: -1074.0 m * Penetration: 0.6 m * Recovery: 0.53 m * Location: Filchner Trough * Campaign: ANT-I/2 (PS01) * Basis: Polarstern * Method/Device: Dredge (DRG)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventHuang, Huang
2Latitude of eventLatitudeHuang, Huang
3Longitude of eventLongitudeHuang, Huang
4Elevation of eventElevationmHuang, Huang
5DEPTH, sediment/rockDepthmHuang, HuangGeocode
6Lead-206/Lead-204 ratio206Pb/204PbHuang, Huang
7Lead-206/Lead-204, error206Pb/204Pb e±Huang, Huang2 SE
8Lead-207/Lead-204 ratio207Pb/204PbHuang, Huang
9Lead-207/Lead-204, error207Pb/204Pb e±Huang, Huang2 SE
10Lead-208/Lead-204 ratio208Pb/204PbHuang, Huang
11Lead-208/Lead-204, error208Pb/204Pb e±Huang, Huang2 SE
12Lead-208/Lead-206 ratio208Pb/206PbHuang, Huang
13Lead-208/Lead-206, error208Pb/206Pb e±Huang, Huang2 SE
14Lead-207/Lead-206 ratio207Pb/206PbHuang, Huang
15Lead-207/Lead-206, error207Pb/206Pb e±Huang, Huang2 SE
16Lead-208/Lead-207 ratio208Pb/207PbHuang, Huang
17Lead-208/Lead-207, error208Pb/207Pb e±Huang, Huang2 SE
18ε-Neodymiumε-NdHuang, Huang
19ε-Neodymium, errorε-Nd e±Huang, Huang
Size:
980 data points

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