Friedrich, Oliver; Herrle, Jens O; Kößler, Peter; Hemleben, Christoph (2004): Early Maastrichtian stable isotopes: changing deep water sources in the North Atlantic [dataset publication series]? PANGAEA, https://doi.org/10.1594/PANGAEA.694724, Supplement to: Friedrich, O et al. (2004): Early Maastrichtian stable isotopes: changing deep water sources in the North Atlantic? Palaeogeography, Palaeoclimatology, Palaeoecology, 211(1-2), 171-184, https://doi.org/10.1016/j.palaeo.2004.05.004
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Abstract:
We propose that the observed short-term stable isotope fluctuations reflect changes in high- and low-latitude intermediate to deep water sources, based on a high-resolution stable isotope record of planktic and benthic foraminifera from the Early Maastrichtian (~71.3 to ~ 69.6 Ma) of Blake Nose (DSDP Site 390A, North Atlantic). Sources of these waters may have been the low-latitude eastern Tethys and high-latitude North Atlantic. Changes in intermediate to deep water sources were probably steered by eccentricity-controlled insolation fluctuations. Lower insolation favored the formation of high-latitude deep waters due to positive feedback mechanisms resulting in high-latitude cooling. This led to a displacement of low-latitude deep waters at Blake Nose. Higher insolation reduced intermediate to deep-water formation in high latitudes, yielding a more northern flow of low-latitude deep waters.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 30.142300 * Longitude: -76.112300
Date/Time Start: 1975-08-29T00:00:00 * Date/Time End: 1975-08-29T00:00:00
Event(s):
44-390A * Latitude: 30.142300 * Longitude: -76.112300 * Date/Time: 1975-08-29T00:00:00 * Elevation: -2665.0 m * Penetration: 142.5 m * Recovery: 86.3 m * Location: North Atlantic * Campaign: Leg44 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 133 m cored; 0 m drilled; 64.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Friedrich, O; Herrle, JO; Kößler, P et al. (2004): Grey values of ODP Hole 44-390A. https://doi.org/10.1594/PANGAEA.138352
- Friedrich, O; Herrle, JO; Kößler, P et al. (2004): (Table 1) Stable carbon and oxygen isotope ratios of planktic and benthic foraminifera in early Maastrichtian sediments of DSDP Hole 44-390A in the North Atlantic. https://doi.org/10.1594/PANGAEA.694723