High-temperature Si isotope fractionation between iron metal and silicate
Abstract
The Si stable isotope fractionation between metal and silicate has been investigated experimentally at 1800, 2000, and 2200 °C. We find that there is a significant silicon stable isotope fractionation at high temperature between metal and silicate in agreement with Shahar et al. (2009). Further we find that this fractionation is insensitive to the structure and composition of the silicate as the fractionation between silicate melt and olivine is insignificant within the error of the analyses. The temperature-dependent silicon isotope fractionation is Δ 30Si silicate-metal = 7.45 ± 0.41 × 10 6/ T2. We also demonstrate the viability of using laser ablation MC-ICPMS as a tool for measuring silicon isotope ratios in high pressure and temperature experiments.
- Publication:
-
Geochimica et Cosmochimica Acta
- Pub Date:
- December 2011
- DOI:
- 10.1016/j.gca.2011.09.038
- Bibcode:
- 2011GeCoA..75.7688S