Diester-Haass, Lieselotte; Billups, Katharina; Emeis, Kay-Christian (2005): Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.835306, Supplement to: Diester-Haass, L et al. (2005): In search of the late Miocene-early Pliocene “biogenic bloom” in the Atlantic Ocean (Ocean Drilling Program Sites 982, 925, and 1088). Paleoceanography, 20(4), PA4001, https://doi.org/10.1029/2005PA001139
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Abstract:
We reconstruct paleoproductivity at three sites in the Atlantic Ocean (Ocean Drilling Program Sites 982, 925, and 1088) to investigate the presence and extent of the late Miocene to early Pliocene 'biogenic bloom' from 9 to 3 Ma. Our approach involves construction of multiple records including benthic foraminiferal and CaCO3 accumulation rates, Uvigerina counts, dissolution proxies, and geochemical tracers for biogenic and detrital fluxes. This time interval also contains the so-called late Miocene carbon isotope shift, a well-known decrease in benthic foraminiferal d13C values. We find that the timing of paleoproductivity maxima differs among the three sites. At Site 982 (North Atlantic), benthic foraminifera and CaCO3 accumulation were both at a maximum at ~5 Ma, with smaller peaks at ~6 Ma. The paleoproductivity maximum was centered earlier (~6.6-6.0 Ma) in the tropical Atlantic (Site 925). In the South Atlantic (Site 1088), paleoproductivity increased even earlier, between 8.2 Ma and 6.2 Ma, and remained relatively high until ~5.4 Ma. We note that there is some overlap between the interval of maximum productivity between Sites 925 and 1088, as well as the minor productivity increase at Site 982. We conclude that the paleoproductivity results support hypotheses aiming to place the biogenic bloom into a global context of enhanced productivity. In addition, we find that at all three sites the d13C shift is accompanied by carbonate dissolution. This observation is consistent with published studies that have sought a relationship between the late Miocene carbon isotope shift and carbonate preservation.
Other version:
Diester-Haass, Lieselotte; Billups, Katharina; Emeis, Kay-Christian (2005): NOAA/WDS Paleoclimatology - Miocene-Pliocene Biogenic Bloom Atlantic Paleoproductivity Data. NOAA National Centers for Environmental Information, https://doi.org/10.25921/RA0M-1509
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 6.861590 * Median Longitude: -15.258757 * South-bound Latitude: -41.136060 * West-bound Longitude: -43.489100 * North-bound Latitude: 57.516700 * East-bound Longitude: 13.562830
Date/Time Start: 1994-02-08T09:00:00 * Date/Time End: 1997-12-17T23:15:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Diester-Haass, L; Billups, K; Emeis, K-C (2005): Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 154-925B. https://doi.org/10.1594/PANGAEA.835303
- Diester-Haass, L; Billups, K; Emeis, K-C (2005): Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 162-982B. https://doi.org/10.1594/PANGAEA.835304
- Diester-Haass, L; Billups, K; Emeis, K-C (2005): Geochemistry, sediment components, and paleoproductivity reconstruction for the Miocene to early Pliocene of ODP Hole 177-1088B. https://doi.org/10.1594/PANGAEA.835305