Mekik, Figen; Francois, Roger (2006): (Tables 2, 3) Element ratios of planktonic foraminifera from western Pacific surface sediments [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.832902, Supplement to: Mekik, F; Francois, R (2006): Tracing deep-sea calcite dissolution: Agreement between the| Globorotalia menardii fragmentation index and elemental ratios (Mg/Ca and Mg/Sr) in planktonic foraminifers. Paleoceanography, 21(4), PA4219, https://doi.org/10.1029/2006PA001296
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Abstract:
Accurately quantifying deep-sea calcite dissolution is crucial for understanding the role of the marine carbonate system in regulating atmospheric pCO2 over millennia. We compare a foraminifer-fragmentation-based calcite dissolution proxy (Globorotalia menardii fragmentation index (MFI)) to Mg/Ca, Sr/Ca, and Mg/Sr in several species of deep dwelling planktonic foraminifers. We conducted microfossil and geochemical analyses on the same core top samples taken at different depths on the Ontong Java Plateau to maximize the dissolution signal and minimize the temperature overprint on our data. We also compare elemental ratios from planktonic foraminifer tests to modern bottom water [CO3]2- undersaturation and model-derived estimates of percent calcite dissolved in deep-sea sediments. We find clear linear decreases in Mg/Ca or Mg/Sr in G. menardii and Pulleniatina obliquiloculata with increasing (1) bottom water [CO3]2- undersaturation, (2) percent calcite dissolved in sediments calculated with biogeochemical modeling, (3) MFI, and (4) percent calcite dissolved derived from MFI. These findings lend further support to MFI as a calcite dissolution proxy for deep-sea sediments. In contrast, we find no significant correlation between Sr/Ca and independent dissolution indicators. Our results suggest that Mg/Ca and Mg/Sr from deep dwelling foraminifers could potentially be used as calcite dissolution proxies in combination with independent water temperature estimates. Likewise, establishing the relationship between MFI and dissolution-induced changes in the Mg/Ca of surface-dwelling foraminifers could provide a tool to correct Mg/Ca–derived sea surface temperature reconstructions for calcite dissolution.
Coverage:
Median Latitude: -0.901733 * Median Longitude: 159.692333 * South-bound Latitude: -2.083000 * West-bound Longitude: 155.865000 * North-bound Latitude: -0.003000 * East-bound Longitude: 162.683000
Date/Time Start: 1975-04-18T00:00:00 * Date/Time End: 1975-04-29T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
ERDC-089P * Latitude: -0.003000 * Longitude: 155.865000 * Date/Time: 1975-04-18T00:00:00 * Elevation: -1932.0 m * Campaign: ERDC * Basis: Thomas Washington * Method/Device: Piston corer (PC)
ERDC-090G * Latitude: -0.865000 * Longitude: 157.480000 * Date/Time: 1975-04-19T00:00:00 * Elevation: -1903.0 m * Campaign: ERDC * Basis: Thomas Washington * Method/Device: Gravity corer (GC)
ERDC-098G * Latitude: -2.083000 * Longitude: 158.473000 * Date/Time: 1975-04-20T00:00:00 * Elevation: -1977.0 m * Campaign: ERDC * Basis: Thomas Washington * Method/Device: Gravity corer (GC)
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 | Neogloboquadrina dutertrei | N. dutertrei | # | Mekik, Figen | measured | |
| 7 | Neogloboquadrina dutertrei | N. dutertrei | # | Mekik, Figen | duplicate | |
| 8 | Globorotalia menardii | G. menardii | # | Mekik, Figen | measured | |
| 9 | Globorotalia menardii | G. menardii | # | Mekik, Figen | duplicate | |
| 10 | Pulleniatina obliquiloculata | P. obliquiloculata | # | Mekik, Figen | measured | |
| 11 | Pulleniatina obliquiloculata | P. obliquiloculata | # | Mekik, Figen | duplicate | |
| 12 | Globorotalia tumida | G. tumida | # | Mekik, Figen | measured | |
| 13 | Globorotalia tumida | G. tumida | # | Mekik, Figen | duplicate | |
| 14 | Neogloboquadrina dutertrei, Magnesium/Calcium ratio | N. dutertrei Mg/Ca | mmol/mol | Mekik, Figen | measured | |
| 15 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | N. dutertrei, measured | |
| 16 | Neogloboquadrina dutertrei, Magnesium/Calcium ratio | N. dutertrei Mg/Ca | mmol/mol | Mekik, Figen | duplicate | |
| 17 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | N. dutertrei, duplicate | |
| 18 | Globorotalia menardii, Magnesium/Calcium ratio | G. menardii Mg/Ca | mmol/mol | Mekik, Figen | measured | |
| 19 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | G. menardii, measured | |
| 20 | Globorotalia menardii, Magnesium/Calcium ratio | G. menardii Mg/Ca | mmol/mol | Mekik, Figen | duplicate | |
| 21 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | G. menardii, duplicate | |
| 22 | Pulleniatina obliquiloculata, Magnesium/Calcium ratio | P. obliquiloculata Mg/Ca | mmol/mol | Mekik, Figen | measured | |
| 23 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | P. obliquiloculata, measured | |
| 24 | Pulleniatina obliquiloculata, Magnesium/Calcium ratio | P. obliquiloculata Mg/Ca | mmol/mol | Mekik, Figen | duplicate | |
| 25 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | P. obliquiloculata, duplicate | |
| 26 | Globorotalia tumida, Magnesium/Calcium ratio | G. tumida Mg/Ca | mmol/mol | Mekik, Figen | measured | |
| 27 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | G. tumida, measured | |
| 28 | Globorotalia tumida, Magnesium/Calcium ratio | G. tumida Mg/Ca | mmol/mol | Mekik, Figen | duplicate | |
| 29 | Magnesium/Calcium ratio, standard deviation | Mg/Ca std dev | ± | Mekik, Figen | G. tumida, duplicate | |
| 30 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | N. dutertrei, measured | |
| 31 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | N. dutertrei, measured | ||
| 32 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | N. dutertrei, duplicate | |
| 33 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | N. dutertrei, duplicate | ||
| 34 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | G. menardii, measured | |
| 35 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | G. menardii, measured | ||
| 36 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | G. menardii, duplicate | |
| 37 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | G. menardii, duplicate | ||
| 38 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | P. obliquiloculata, measured | |
| 39 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | P. obliquiloculata, measured | ||
| 40 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | P. obliquiloculata, duplicate | |
| 41 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | P. obliquiloculata, duplicate | ||
| 42 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | G. tumida, measured | |
| 43 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | G. tumida, measured | ||
| 44 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Mekik, Figen | G. tumida, duplicate | |
| 45 | Strontium/Calcium ratio | Sr/Ca | Mekik, Figen | G. tumida, duplicate | ||
| 46 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | N. dutertrei, measured [mmol/mmol] | ||
| 47 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | N. dutertrei, measured | ||
| 48 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | N. dutertrei, duplicate [mmol/mmol] | ||
| 49 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | N. dutertrei, duplicate | ||
| 50 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | G. menardii, measured [mmol/mmol] | ||
| 51 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | G. menardii, measured | ||
| 52 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | G. menardii, duplicate [mmol/mmol] | ||
| 53 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | G. menardii, duplicate | ||
| 54 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | P. obliquiloculata, measured [mmol/mmol] | ||
| 55 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | P. obliquiloculata, measured | ||
| 56 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | P. obliquiloculata, duplicate [mmol/mmol] | ||
| 57 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | P. obliquiloculata, duplicate | ||
| 58 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | G. tumida, measured [mmol/mmol] | ||
| 59 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | G. tumida, measured | ||
| 60 | Magnesium/Strontium ratio | Mg/Sr | Mekik, Figen | G. tumida, duplicate [mmol/mmol] | ||
| 61 | Magnesium/Strontium ratio, standard deviation | Mg/Sr std dev | Mekik, Figen | G. tumida, duplicate |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
363 data points