DePaolo, Donald J (2009): Strontium isotopic data for calcareous ooze, chalk, and pore waters from DSDP Hole 590B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.711800
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Abstract:
A detailed study of strontium isotope variations in Neogene marine carbonate sediments from Deep Sea Drilling Project Site 590B, using techniques that allow the 87Sr/86Sr ratio to be determined to better than +/-0.00001, gives a high-resolution record of the Sr isotopic evolution of seawater. The data show that the rate of change of the marine 87Sr/86Sr ratio has varied significantly even on time scales as short as 1 m.y. Periods of particularly rapid growth appear to follow major marine regressions and probably reflect an increase in the delivery of radiogenic Sr from the continents coupled with a decreased submarine carbonate dissolution rate (greater carbonate compensation depth). Periods of relatively slowly changing 87Sr/86Sr follow major marine transgressions. On the basis of correlations with the marine oxygen isotope record and the times of major continental glacier growth, it is inferred that the effects of sea-level variations are modified by climatic factors that affect the intensity of continental weathering and runoff. The effects of sea-floor generation rate variations are not discernible for the Neogene. The maximum attainable stratigraphic resolution using Sr isotopes is between 0.1 and 2 m.y. for this time period.
Related to:
DePaolo, Donald J (1986): Detailed record of the Neogene Sr isotopic evolution of seawater from DSDP Site 590B. Geology, 14(2), 103-106, https://doi.org/10.1130/0091-7613(1986)14%3C103:DROTNS%3E2.0.CO;2
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -29.903750 * Median Longitude: 121.236450 * South-bound Latitude: -31.167000 * West-bound Longitude: -5.129700 * North-bound Latitude: -26.114000 * East-bound Longitude: 163.358500
Date/Time Start: 1980-05-06T00:00:00 * Date/Time End: 1982-12-15T00:00:00
Event(s):
73-522 * Latitude: -26.114000 * Longitude: -5.129700 * Date/Time: 1980-05-06T00:00:00 * Elevation: -4441.0 m * Penetration: 148.7 m * Recovery: 137.6 m * Location: South Atlantic/PLATEAU * Campaign: Leg73 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 36 cores; 143.8 m cored; 5 m drilled; 95.7 % recovery
90-590B * Latitude: -31.167000 * Longitude: 163.358500 * Date/Time: 1982-12-15T00:00:00 * Elevation: -1299.0 m * Penetration: 499.1 m * Recovery: 464.6 m * Location: South Pacific/Tasman Sea/CONT RISE * Campaign: Leg90 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 499.1 m cored; 0 m drilled; 93.1 % 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
- DePaolo, DJ (1986): (Table 1) Age and strontium isotopic data for samples of calcareous ooze and chalk from DSDP Hole 590B. https://doi.org/10.1594/PANGAEA.711798
- DePaolo, DJ (1986): (Table 1) Strontium content and isotope ratio of pore waters from DSDP Hole 590B. https://doi.org/10.1594/PANGAEA.711799