10.1594/PANGAEA.695311
Spofforth, David J A
David J A
Spofforth
Pälike, Heiko
Heiko
Pälike
0000-0003-3386-0923
Green, Darryl R H
Darryl R H
Green
Paleogene record of elemental concentrations in sediments from the Arctic Ocean obtained by XRF analyses
PANGAEA
2008
Exp302
CCGS Captain Molly Kool (Vidar Viking)
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
2004-08-19T00:00:00/2004-08-27T00:00:00
en
Supplementary Publication Series of Datasets
10.1029/2007PA001489
IBCR0302RHTS001
IBCR0302RHVS001
4 datasets
application/zip
Creative Commons Attribution 3.0 Unported
We present a high-resolution X-ray fluorescence (XRF) core scanner record for the expanded middle Eocene section from Integrated Ocean Drilling Program (IODP) Expedition 302 (ACEX) drilled on the Lomonosov Ridge, central Arctic Ocean. The division of the middle Eocene into two units (subunit 1/6 and unit 2) is seen in the cyclical behavior of the elements as well as the changing interelemental correlations and their relationship to physical property measurements of bulk sediment. Al, Ti, and K strongly correlate throughout the record, while the behavior of Fe, Mn, and Si is more complex. Utilizing sediment geochemistry calibration to ground truth the XRF data, we suggest the middle Eocene Arctic Ocean was predominately euxinic, although periodic oxygenation of bottom waters must have occurred during unit 2 (49.7–45.4 Ma). Initially, the sediments are rich in biogenic silica (unit 2), but there is a pronounced shift to terrigenous dominated sediment accumulation in subunit 1/6. We report changes in the elemental concentrations of these elements and investigate the relationship between Fe content and pyrite. Additionally, we explore the potential change in paleoenvironmental conditions across the unit boundary.
Supplement to: Spofforth, David J A; Pälike, Heiko; Green, Darryl R H (2008): Paleogene record of elemental concentrations in sediments from the Arctic Ocean obtained by XRF analyses. Paleoceanography, 23(1), PA1S09
136.17735
139.36501
87.86658
87.92118
Arctic Ocean