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Hull, Pincelli M; Norris, Richard D (2011): Biogenic barium in Cretaceous-Paleogene sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.829967, Supplement to: Hull, PM; Norris, RD (2011): Diverse patterns of ocean export productivity change across the Cretaceous-Paleogene boundary: New insights from biogenic barium. Paleoceanography, 26(3), PA3205, https://doi.org/10.1029/2010PA002082

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Abstract:
One of the best-studied aspects of the K-Pg mass extinction is the decline and subsequent recovery of open ocean export productivity (e.g., the flux of organic matter from the surface to deep ocean). Some export proxies, including surface-to-deep water d13C gradients and carbonate sedimentation rates, indicate a global decline in export productivity triggered by the extinction. In contrast, benthic foraminiferal and other geochemical productivity proxies suggest spatially and temporally heterogeneous K-Pg boundary effects. Here we address these conflicting export productivity patterns using new and compiled measurements of biogenic barium. Unlike a previous synthesis, we find that the boundary effect on export productivity and the timing of recovery varied considerably between different oceanic sites. The northeast and southwest Atlantic, Southern Ocean, and Indian Ocean records saw export production plummet and remain depressed for 350 thousand to 2 million years. Biogenic barium and other proxies in the central Pacific and some upwelling or neritic Atlantic sites indicate the opposite, with proxies recording either no change or increased export production in the early Paleocene. Our results suggest that widespread declines in surface-to-deep ocean d13C do not record a global decrease in export productivity. Rather, independent proxies, including barium and other geochemical proxies, and benthic community structure, indicate that some regions were characterized by maintained or rapidly recovered organic flux from the surface ocean to the deep seafloor, while other regions had profound reductions in export productivity that persisted long into the Paleocene.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -4.958800 * Median Longitude: 26.976108 * South-bound Latitude: -65.160000 * West-bound Longitude: -41.088000 * North-bound Latitude: 40.960000 * East-bound Longitude: 158.505930
Date/Time Start: 1974-11-16T00:00:00 * Date/Time End: 2001-09-21T07:10:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Hull, PM; Norris, RD (2014): (Table S1) Geochemistry of ODP Hole 39-356. https://doi.org/10.1594/PANGAEA.829963
  2. Hull, PM; Norris, RD (2014): (Table S2) Geochemistry of ODP Hole 47-398D. https://doi.org/10.1594/PANGAEA.829964
  3. Hull, PM; Norris, RD (2014): (Table S3) Geochemistry of ODP Hole 113-690C. https://doi.org/10.1594/PANGAEA.829961
  4. Hull, PM; Norris, RD (2014): (Table S4) Geochemistry of ODP Hole 198-1209B. https://doi.org/10.1594/PANGAEA.829962