McKenna, V S; Prell, Warren L (2004): Magnesium concentrations of individual shells of Globorotalia truncatulinoides [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.839816, Supplement to: McKenna, VS; Prell, WL (2004): Calibration of the Mg/Ca of Globorotalia truncatulinoides (R) for the reconstruction of marine temperature gradients. Paleoceanography, 19(2), PA2006, https://doi.org/10.1029/2000PA000604
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Recent work has provided useful Mg/Ca to water temperature calibrations for shallow-dwelling planktonic foraminifer species. Globorotalia truncatulinoides (right coiling (R)) is a deep-dwelling species that can serve as a source of information about the temporal variability in the water characteristics of the thermocline. We present a temperature calibration for the Mg/Ca in the shell of G. truncatulinoides (R) and examine some of the practical issues associated with evaluating the usefulness of the technique. The Mg/Ca in the primary and the secondary calcite of individual G. truncatulinoides (R) correlates exponentially with water column temperatures, showing a change of ~10% in the Mg/Ca per 1°C (R**2 = 0.92). A limited comparison with plankton tow samples demonstrates that the average Mg/Ca temperature was offset +1°C from the average temperature calculated using the d18O calibration of O'Neil et al. (1969, doi:10.1063/1.1671982), and the Mg/Ca temperatures have a range similar to the d18O temperatures. Comparisons of the [Mg] in the core top samples to water depth of deposition indicates that dissolution does not alter the measured value of Mg in the primary calcite.
Coverage:
Median Latitude: 0.712421 * Median Longitude: 3.353429 * South-bound Latitude: -39.720000 * West-bound Longitude: -63.496267 * North-bound Latitude: 23.000917 * East-bound Longitude: 99.250000
Date/Time Start: 1958-04-29T00:00:00 * Date/Time End: 1996-05-23T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- McKenna, VS; Prell, WL (2004): (Table 3) Magnesium concentrations of individual shells of Globorotalia truncatulinoides from Atlantic Ocean water samples. https://doi.org/10.1594/PANGAEA.839815
- McKenna, VS; Prell, WL (2004): (Table 3) Magnesium concentrations of individual shells of Globorotalia truncatulinoides from Indian Ocean surface sediment samples. https://doi.org/10.1594/PANGAEA.839812