Fig. 5: Estimated interstellar ice abundances incorporated by the various solids and/or bodies to reproduce their μ96Zr values.
From: Interstellar ices as carriers of supernova material to the early solar system
The amount of ice accreted to reproduce the variability observed between Earth and Tagish Lake correspond to approximately 22–25% by mass. This calculation assumes that the μ96Zr ice and ice-free endmembers are 4900 ppm and −800 ppm, and that the Zr concentrations of the two endmembers are 2.29 ppm and 3.6 ppm, respectively. An underestimation of the μ96Zr value of the anomalous ice endmember by an order of magnitude (and the associated calculated Zr concentration) results in a comparable range of abundances of ice accreted corresponding to 18–22% by mass. We conclude that the narrow range of accreted ices between the bodies inferred here is a robust result. CAIs calcium–aluminium-rich inclusions.
