Rosenthal, Yair; Lohmann, G P; Lohmann, Kyger C; Sherrell, R M (2000): (Table 1) Shell mass and chemistry of Globigerinoides sacculifer [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.855384, Supplement to: Rosenthal, Y et al. (2000): Incorporation and preservation of Mg in Globigerinoides sacculifer: implications for reconstructing the temperature and 18O/16O of seawater. Paleoceanography, 15(1), 135-145, https://doi.org/10.1029/1999PA000415
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Abstract:
Using bathymetric transects of surface sediments underlying similar sea surface temperatures but exposed to increasing dissolution, we examined the processes which affect the relationship between foraminiferal Mg/Ca and d18O. We found that Globigerinoides saccculifer calcifies over a relatively large range of water depth and that this is apparent in their Mg content. On the seafloor, foraminiferal Mg/Ca is substantially altered by dissolution with the degree of alteration increasing with water depth. Selective dissolution of the chamber calcite, formed in surface waters, shifts the shell's bulk Mg/Ca and d18O toward the chemistries of the secondary crust acquired in colder thermocline waters. The magnitude of this shift depends on both the range of temperatures over which the shell calcified and the degree to which it is subsequently dissolved. In spite of this shift the initial relationship between Mg/Ca and d18O, determined by their temperature dependence, is maintained. We conclude that paired measurements of d18O and Mg/Ca can be used for reconstructing d18Owater, though care must be taken to determine where in the water column the reconstruction applies.
Related to:
Brown, Sarah J; Elderfield, Henry (1996): Variations in Mg/Ca and Sr/Ca ratios of planktonic foraminifera caused by postdepositional dissolution: Evidence of shallow Mg-dependent dissolution. Paleoceanography, 11(5), 543-551, https://doi.org/10.1029/96PA01491
Curry, William B; Lohmann, G P (1986): Late Quaternary carbonate sedimentation at the Sierra Leone Rise (eastern equatorial Atlantic Ocean). Marine Geology, 70(3-4), 223-250, https://doi.org/10.1016/0025-3227(86)90004-6
Curry, William B; Lohmann, G P (1990): Reconstructing past particle fluxes in the tropical Atlantic Ocean. Paleoceanography, 5(4), 487-505, https://doi.org/10.1029/PA005i004p00487
Slowey, Niall C (1990): The modern and glacial thermoclines along the Bahamas Banks [dissertation]. MIT/WHOI, WHOI-90-49, Woods Hole Oceanographic Institute, Woods Hole, Mass.
Coverage:
Median Latitude: 6.411845 * Median Longitude: -70.721690 * South-bound Latitude: -2.179167 * West-bound Longitude: 157.001333 * North-bound Latitude: 26.190000 * East-bound Longitude: -19.762000
Date/Time Start: 1981-05-26T00:00:00 * Date/Time End: 1984-11-08T00:00:00
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 0.115 m
Event(s):
EN066-10GGC * Latitude: 6.670000 * Longitude: -21.900000 * Date/Time: 1981-05-26T00:00:00 * Elevation: -3527.0 m * Campaign: EN06601 * Basis: Endeavor * Method/Device: Gravity corer (GC)
EN066-16GGC * Latitude: 6.650000 * Longitude: -21.140000 * Date/Time: 1981-05-27T00:00:00 * Elevation: -3152.0 m * Campaign: EN06601 * Basis: Endeavor * Method/Device: Gravity corer (GC)
EN066-21GGC * Latitude: 4.233000 * Longitude: -20.625000 * Date/Time: 1981-05-27T00:00:00 * Elevation: -3995.0 m * Campaign: EN06601 * Basis: Endeavor * Method/Device: Gravity corer (GC)
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
238 data points