  The ungrouped iron meteorite Nedagolla is the first meteorite with bulk Mo,
Ru, and Ni isotopic compositions that are intermediate between those of the
non-carbonaceous (NC) and carbonaceous (CC) meteorite reservoirs. The Hf-W
chronology of Nedagolla indicates that this mixed NC-CC isotopic composition
was established relatively late, more than 7 million years after Solar System
formation. The mixed NC-CC isotopic composition is consistent with the chemical
composition of Nedagolla, which combines signatures of metal segregation under
more oxidizing conditions (relative depletions in Mo and W), characteristic for
CC bodies, and more reducing conditions (high Si and Cr contents),
characteristic for some NC bodies, in a single sample. These data combined
suggest that Nedagolla formed as the result of collisional mixing of NC and CC
core material, which partially re-equilibrated with silicate mantle material
that predominantly derives from the NC body. These mixing processes might have
occurred during a hit-and-run collision between two differentiated bodies,
which also provides a possible pathway for Nedagolla's extreme volatile element
depletion. As such, Nedagolla provides the first isotopic evidence for early
collisional mixing of NC and CC bodies that is expected as a result of
Jupiter's growth.
