Palmer, Martin R (1985): (Table 1) 87Sr/86Sr and Sr/Ca ratios in foraminiferal calcite from DSDP Holes 3-21 and 39-357 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.770027, Supplement to: Palmer, Martin R; Elderfield, Henry (1985): Sr isotope composition of sea water over the past 75 Myr. Nature, 1985(6011), 526-528, https://doi.org/10.1038/314526a0
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Abstract:
The 87Sr/86Sr ratio of ancient seawater, as recorded in marine carbonates, is an important tracer of long-term variations in ocean chemistry (Burke et al., 1982, doi:10.1130/0091-7613(1982)10<516:VOSSTP>2.0.CO;2; Peterman et al., 1970, doi:10.1016/0016-7037(70)90154-7; Dasch and Biscaye, 1971, doi:10.1016/0012-821X(71)90164-6; Veizer and Compston, 1974, doi:10.1016/0016-7037(74)90099-4; Brass, 1976, doi:10.1016/0016-7037(76)90025-9). However, the Sr isotope balance of the oceans has been difficult to constrain; consequently, attempts to evaluate the temporal 87Sr/86Sr changes have been largely qualitative. To constrain the causes of these variations we have measured 87Sr/86Sr ratios in carefully cleaned unrecrystallized foraminifera from DSDP sites 21 and 357. The data presented here have been quantitatively modelled taking advantage of recent advances in understanding of the Sr geochemical cycle. They suggest that whereas hydrothermal fluxes and carbonate recycling are of major importance in defining the marine 87Sr/86Sr ratio, the major control over its variations through the Cenozoic has been changes in the isotope composition of Sr derived from the weathering of silicate rocks.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -29.294600 * Median Longitude: -33.078650 * South-bound Latitude: -30.004200 * West-bound Longitude: -35.559800 * North-bound Latitude: -28.585000 * East-bound Longitude: -30.597500
Date/Time Start: 1969-01-15T00:00:00 * Date/Time End: 1974-11-23T00:00:00
Minimum DEPTH, sediment/rock: 1.0 m * Maximum DEPTH, sediment/rock: 476.5 m
Event(s):
3-21 * Latitude: -28.585000 * Longitude: -30.597500 * Date/Time: 1969-01-15T00:00:00 * Elevation: -2113.0 m * Penetration: 130.6 m * Recovery: 72.6 m * Location: South Atlantic/CONT RISE * Campaign: Leg3 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 70.4 m cored; 0 m drilled; 103.1 % recovery
39-357 * Latitude: -30.004200 * Longitude: -35.559800 * Date/Time: 1974-11-23T00:00:00 * Elevation: -2086.0 m * Penetration: 797 m * Recovery: 344.3 m * Location: South Atlantic/CONT RISE * Campaign: Leg39 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 463.5 m cored; 9.5 m drilled; 74.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | AGE | Age | ka BP | Geocode | ||
| 4 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Palmer, Martin R | |||
| 5 | Strontium-87/Strontium-86 ratio, error | 87Sr/86Sr e | ± | Palmer, Martin R | ||
| 6 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Palmer, Martin R |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
54 data points