THE DERRICK PEAK, ANTARCTICA, IRON METEORITES

Sixteen iron meteorite specimens, Derrick Peak A78001 through DRPA78016, were recovered from the slopes of Derrick Peak, Antarctica, in 1978. Recovery from a relatively small area combined with their strikingly similar appearances suggest they represent a single fall. The metallographic structure of the two specimens that have been cut is dominated by regions of swathing kamacite enclosing coarse schreibersite and schreibersite‐troilite inclusions. Patches of coarsest octahedrite Widmanstätten structure are interspersed. Specimens DRPA78008 and DRPA78009 have been analyzed: 6.64, 6.59 wt % Ni; 0.51, 0.46 wt % Co; 0.35, 0.34 wt % P. The specimens are coarsest octahedrites of chemical group IIB.