Tysnes Island - An unusual clast composed of solidified, immiscible, Fe-FeS and silicate melts

An inclusion found in the Tysnes Island gas-rich H4 chondrite is described. The clast consists of two distinct portions, separated by a smooth boundary; the portions are a tear-drop shaped Fe-FeS eutecticlike intergrowth (0.5 cm greatest dimension) and a silicate consisting primarily of olivine in glass. Nickel enrichment is found in the metal at the metal-sulfide boundaries and in nodules within the metal. It is thought that the portions separated from one another as immiscible liquids and that the modal composition of each portion agrees with the compositions predicted for a total melt of an H-group chondrite. The inclusion is discussed in terms of the process of metal-silicate fractionation suggested by Fodor and Keil (1976).