Assessment of a Sr isotope vital effect (87Sr/86Sr) in marine taxa from Lee Stocking Island, Bahamas.

Autor: Reinhardt, E. G., Blenkinsop, J., Patterson, R. T.
Zdroj: Geo-Marine Letters; Jan1999, Vol. 18 Issue 3, p241-246, 6p
Abstrakt: Data from Lee Stocking Island, Bahamas, confirms the hypothesis that there are no vital effects with the uptake of Sr isotopes (87Sr/86Sr) at the present mass spectrometer resolution [±2×10-5 (2σ)]. Our data set contains analyses of 40 samples derived from 37 different calcareous taxa inhabiting a wide range of carbonate subenvironments (i.e., reefal, intertidal, supratidal, mangrove). The mean value of our analyses was 0.709179 with a standard deviation of 2.4×10-5 (2σ) which was very close to the long-term uncertainty of the strontium isotope methodology [±2.0×10-5 (2σ)] and to the widely reported 87Sr/86Sr value of seawater, which clusters around 0.709175. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index