Radiogenic isotope record of Arctic Ocean circulation and weathering inputs of the past 15 million years ...

Lead (Pb), neodymium (Nd), and strontium (Sr) isotopic analyses were carried out on sediment leachates (reflecting the isotope composition of past seawater) and digests of the bulk residues (reflecting detrital continental inputs) of Integrated Ocean Drilling Program (IODP) Leg 302 and core PS2185 f...

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Bibliographic Details
Main Authors: Haley, Brian A, Frank, Martin, Spielhagen, Robert F, Fietzke, Jan
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2008
Subjects:
Composite Core
Giant box corer
Kasten corer
Exp302
ARK-XVII/2
ARK-VIII/3
CCGS Captain Molly Kool Vidar Viking
Polarstern
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP
Arctic
Arctic Ocean
Greenland
Lomonosov Ridge
Online Access:https://dx.doi.org/10.1594/pangaea.734430
https://doi.pangaea.de/10.1594/PANGAEA.734430
Description
Summary:Lead (Pb), neodymium (Nd), and strontium (Sr) isotopic analyses were carried out on sediment leachates (reflecting the isotope composition of past seawater) and digests of the bulk residues (reflecting detrital continental inputs) of Integrated Ocean Drilling Program (IODP) Leg 302 and core PS2185 from the Lomonosov Ridge (Arctic Ocean). Our records are interpreted to reflect changes in continental erosion and oceanic circulation, driven predominantly by tectonic forcing on million-year timescales in the older (pre-2 Ma) part of the record and by climatic forcing of weathering and erosion of the Eurasian continental margin on thousand-year timescales in the younger (post-2 Ma) part. These data, covering the past ~15 Ma, show that continental inputs to the central Arctic Ocean have been more closely linked to glacial and hydrological processes occurring on the Eurasian margin than on continental North America and Greenland. The constancy of the detrital input signatures supports the early existence of an ... : Supplement to: Haley, Brian A; Frank, Martin; Spielhagen, Robert F; Fietzke, Jan (2008): Radiogenic isotope record of Arctic Ocean circulation and weathering inputs of the past 15 million years. Paleoceanography, 23(1), PA1S13 ...

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