Hassold, Noralynn J C; Rea, David K; van der Pluijm, Ben A; Parés, Josep M; Gleason, James D; Ravelo, Ana Christina (2006): Late Miocene to Pleistocene paleoceanographic records from the Feni and Gardar Drifts: Pliocene reduction in abyssal flow [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.693977, Supplement to: Hassold, NJC et al. (2006): Late Miocene to Pleistocene paleoceanographic records from the Feni and Gardar Drifts: Pliocene reduction in abyssal flow. Palaeogeography, Palaeoclimatology, Palaeoecology, 236(3-4), 290-301, https://doi.org/10.1016/j.palaeo.2005.11.011
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Abstract:
Magnetic fabric analyses from two North Atlantic drift deposits provide proxies for determining relative variations in the strength of abyssal flow over the last 10 my. The data show a cessation of current-controlled sedimentation at the shallower Feni Drift (2417 m) at the time of onset of Northern Hemisphere glaciation (2.6 Ma). Drift formation ended nearly 2 my earlier (4.2 Ma) at the deeper Gardar Drift (3220 m), implying stepwise reduction in deep-water flow. Relatively light delta18O values at the deeper Gardar Drift indicate a warmer, thus also more salty, water mass site prior to 6 Ma. We interpret this as representing Mediterranean Sea water, which flowed north at depths greater than that of the Feni Drift Site. The supply of Mediterranean Water to the North Atlantic was shut off as the Gibraltar Straits closed, causing the Messinian salinity crisis, and never returned to that position in the water column after the Mediterranean opened again.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 53.028983 * Median Longitude: -24.603439 * South-bound Latitude: 52.835800 * West-bound Longitude: -30.318300 * North-bound Latitude: 53.222500 * East-bound Longitude: -18.886800
Date/Time Start: 1983-07-28T00:00:00 * Date/Time End: 1983-08-06T00:00:00
Event(s):
94-610_Site * Latitude: 53.222500 * Longitude: -18.889467 * Date/Time: 1983-07-28T00:00:00 * Penetration: 18.53 m * Recovery: 6.578 m * Location: North Atlantic/RIDGE * Campaign: Leg94 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 84 cores; 788.6 m cored; 0 m drilled; 83.4% recovery
94-610A * Latitude: 53.221500 * Longitude: -18.886800 * Date/Time: 1983-07-28T00:00:00 * Elevation: -2417.0 m * Penetration: 201 m * Recovery: 191.4 m * Location: North Atlantic/RIDGE * Campaign: Leg94 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 cores; 201 m cored; 0 m drilled; 95.2 % recovery
94-611C * Latitude: 52.835800 * Longitude: -30.318300 * Date/Time: 1983-08-06T00:00:00 * Elevation: -3230.0 m * Penetration: 511.6 m * Recovery: 344.1 m * Location: North Atlantic/RIDGE * Campaign: Leg94 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 44 cores; 404 m cored; 28.8 m drilled; 85.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Hassold, NJC; Rea, DK; van der Pluijm, BA et al. (2006): (Table 1) Sedimentology of the Pliocene section of the DSDP Feni Drift Site 94-610 in the North Atlantic. https://doi.org/10.1594/PANGAEA.693974
- Hassold, NJC; Rea, DK; van der Pluijm, BA et al. (2006): (Table 3) Radiogenic isotope analyses for sediment samples of the North Atlantic. https://doi.org/10.1594/PANGAEA.693976
- Hassold, NJC; Rea, DK; van der Pluijm, BA et al. (2006): (Table 2) Sedimentology of the Pliocene section of the DSDP Gardar Drift Site 94-611C in the North Atlantic. https://doi.org/10.1594/PANGAEA.693975