The Green Ham area is underlain by Paleozoic Mt. Eaton Formation (Stikine Assemblage) chert, tuff, tuffaceous sediments and argillite. These rocks have been intruded by Eocene hornblende-biotite quartz-diorite, and gabbro.

Mineralization was found in glacial float and moraine debris. Rusty weathering black argillite contains disseminated to massive pyrite, pyrrhotite and chalcopyrite with minor amounts of sphalerite. The head of the cirque (to the southwest) is heavily oxidized and rusty weathering but was inaccessible due to topographic constraints. It is assumed that this is the source of the mineralized debris.

In the early to mid-2000s, the Green Ham area was staked as part of the Taku property owned by Optima Minerals Inc. The showing was not visited by Optima Minerals.