Fig. 6.

Left: Post-shock depletion vs. shock velocity for core-mantle grain model where core is assumed to be silicate (olivine) and mantle is pyroxene (from Frisch et al., 1999). Right: Percentage of initial total grain mass lost because of dust destruction in the shock vs. shock speed. To get the Si gas phase abundance determined for the LIC we need destruction of silicate dust which is consistent with . Such shocks should destroy less than 15% of the carbonaceous dust, however, in contradiction with the large gas phase abundance of carbon found in many studies (also see Section 3.2).