Marchitto, Thomas M; Oppo, Delia W; Curry, William B (2002): (Table 2) Trace metal ratios of various benthic foraminifera shells [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.844495, Supplement to: Marchitto, TM et al. (2002): Paired benthic foraminiferal Cd/Ca and Zn/Ca evidence for a greatly increased presence of Southern Ocean Water in the glacial North Atlantic. Paleoceanography, 17(3), 10-1-10-18, https://doi.org/10.1029/2000PA000598
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Abstract:
Benthic foraminiferal d13C and Cd/Ca studies suggest that deep Atlantic circulation during the Last Glacial Maximum was very different from today, with high-nutrient (low d13C, high Cd) deep Southern Ocean Water (SOW) penetrating far into the North Atlantic. However, if some glacial d13C values are biased by productivity artifacts and/or air-sea exchange processes, then the existing d13C data may be consistent with the continual dominance of North Atlantic Deep Water (NADW). Cibicidoides wuellerstorfi Cd/Ca results presented here indicate that the glacial North Atlantic was strongly enriched in dissolved Cd below ~2500 m depth. If NADW formation was still vigorous relative to SOW formation, these data could be explained by either increased preformed nutrient levels in the high-latitude North Atlantic or by increased organic matter remineralization within lower NADW. High glacial Zn/Ca values in the same samples, however, are best explained by a substantially increased mixing with Zn-rich SOW. The cause was most likely a partial replacement of NADW by less dense Glacial North Atlantic Intermediate Water. This reorganization also lowered deep North Atlantic [CO3]2- concentrations by perhaps 10 to 15 µmol/kg.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 51.129326 * Median Longitude: -24.486919 * South-bound Latitude: 41.430000 * West-bound Longitude: -32.510000 * North-bound Latitude: 61.183000 * East-bound Longitude: -14.702267
Date/Time Start: 1970-10-01T00:00:00 * Date/Time End: 1995-07-11T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 4.315 m
Event(s):
162-980 * Latitude: 55.484933 * Longitude: -14.702267 * Date/Time Start: 1995-07-10T00:00:00 * Date/Time End: 1995-07-11T00:00:00 * Elevation: -2180.0 m * Penetration: 353.7 m * Recovery: 366.7 m * Location: South Atlantic Ocean * Campaign: Leg162 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 39 cores; 353.7 m cored; 0 m drilled; 103.7% recovery
CHN82-04 * Latitude: 41.430000 * Longitude: -32.510000 * Elevation: -3427.0 m * Campaign: CH8X * Basis: Jean Charcot
CHN82-11 * Latitude: 42.230000 * Longitude: -31.480000 * Elevation: -3209.0 m * Campaign: CH8X * Basis: Jean Charcot
Comment:
C. kullenbergi and C. pachyderma Zn/Ca values may all be contaminated, or these species may have very high Zn partition coefficients.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Depth, top/min | Depth top | m | Marchitto, Thomas M | ||
| 7 | Depth, bottom/max | Depth bot | m | Marchitto, Thomas M | ||
| 8 | Epoch | Epoch | Marchitto, Thomas M | |||
| 9 | Species | Species | Marchitto, Thomas M | |||
| 10 | Calcium | Ca | mmol/l | Marchitto, Thomas M | ||
| 11 | Zinc/Calcium ratio | Zn/Ca | µmol/mol | Marchitto, Thomas M | ||
| 12 | Cadmium/Calcium ratio | Cd/Ca | µmol/mol | Marchitto, Thomas M | ||
| 13 | Manganese/Calcium ratio | Mn/Ca | mmol/mol | Marchitto, Thomas M | ||
| 14 | Comment | Comment | Marchitto, Thomas M |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
445 data points