| Popis: |
Bevan and Axon (1980) proposed that polycrystalline γ (taenite) in the unequilibrated (H3) chondrite Tieschitz is a relic of rapid, non-equilibrium solidification of Fe-Ni-S melts during chondrule formation. Scott and Rajan (1980) dismissed our observations and conclusions. Here we defend and clarify our position. Grain boundaries as observed in polycrystalline γ(taenite) could not have been established either during slow, sub-solidus cooling of homogeneous γ(taenite), or, in the absence of γ/γ grain-boundary α precipitates, by deformation and annealing (hot working). |
