Authigenic Pb and Nd isotope composition snapshot of surface sediments in the Atlantic sector of the Southern Ocean


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.

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Metadata Access
Creator Huang, Huang; Gutjahr, Marcus; Kuhn, Gerhard; Hathorne, Ed C; Eisenhauer, Anton
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2020
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 980 data points
Discipline Earth System Research
Spatial Coverage (-62.167W, -77.653S, 15.031E, -49.013N); Filchner Trough; Filchner Shelf; South Orkney; Kapp Norvegia; Atlantic Ridge; Gould Bay; Camp Norway; Atka Bay; Cape Fiske; Argentine Islands; Maud Rise; Weddell Sea; Eastern Weddell Sea, Southern Ocean; Halley Bay; Atlantic Indik Ridge; Shona Ridge; South Sandwich Basin; Lyddan Island; Lazarev Sea; Scotia Sea; South Atlantic Ocean; Drake Passage
Temporal Coverage Begin 1983-02-13T00:00:00Z
Temporal Coverage End 2016-03-16T12:40:00Z