D47 {isogeochem}

Equilibrium carbonate D47 value

Description

D47() calculates the equilibrium carbonate D47 value for a given temperature.

Usage

D47(temp, eq)

Arguments

temp

Carbonate growth temperature (°C).

eq

Equation used for the calculation.

• "Petersen19": the synthetic-only composite IUPAC-parameter calibration of Petersen et al. (2019).

• "Anderson21": the I-CDES90 calibration of Anderson et al. (2021).

• "Fiebig21": the CDES90 calibration of Fiebig et al. (2021).

Details

"Petersen19":

\Delta_{47, CDES90} = 0.0383 \times \frac{10^{6}}{T^{2}} + 0.170

"Anderson21":

\Delta_{47, I-CDES90} = 0.0391 \times \frac{10^{6}}{T^{2}} + 0.154

"Fiebig21":

\Delta_{47, CDES90} = 1.038 \times (-5.897 \times \frac{1}{T} - 3.521 \times \frac{10^{3}}{T^{2}} + 2.391 \times \frac{10^{7}}{T^{3}} - 3.541 \times \frac{10^{9}}{T^{4}}) + 0.1856

Value

Returns the carbonate D47 value expressed on the CDES90 scale (‰).

References

Petersen, S. V., Defliese, W. F., Saenger, C., Daëron, M., Huntington, K. W., John, C. M., et al. (2019). Effects of improved 17O correction on interlaboratory agreement in clumped isotope calibrations, estimates of mineral-specific offsets, and temperature dependence of acid digestion fractionation. Geochemistry, Geophysics, Geosystems, 20(7), 3495-3519. doi:10.1029/2018GC008127

Anderson, N. T., Kelson, J. R., Kele, S., Daëron, M., Bonifacie, M., Horita, J., et al. (2021). A unified clumped isotope thermometer calibration (0.5-1100°C) using carbonate-based standardization. Geophysical Research Letters, 48(7), e2020GL092069. doi:10.1029/2020gl092069

Fiebig, J., Daëron, M., Bernecker, M., Guo, W., Schneider, G., Boch, R., et al. (2021). Calibration of the dual clumped isotope thermometer for carbonates. Geochimica et Cosmochimica Acta. doi:10.1016/j.gca.2021.07.012

See Also

temp_D47() calculates growth temperature from a D47 value.

Other equilibrium_carbonate: D48(), d17O_c(), d18O_c()

Examples

D47(temp = 33.7, eq = "Petersen19") # Returns 0.577
D47(temp = 33.7, eq = "Fiebig21") # Returns 0.571