The Eagle Creek placer gold deposit occurs mainly on Wright Creek (see 104N 033) near its confluence with Eagle Creek, south of Surprise Lake, about 22 kilometres east of the community of Atlin.

This area, and the area drained by these creeks is underlain by Mississippian to Triassic Kedahda Formation rocks of the Cache Creek Complex. The deposit is directly underlain by buff to grey, fine grained schistose quartzite and dark grey massive graphitic argillites. About 2 kilometres north of this area is a body of upper Mississippian to Permian ultramafic rock of the Cache Creek Complex and the contact of the Late Cretaceous Surprise Lake batholith (Surprise Lake Plutonic Suite).

Most of the placer gold recovered is coarse and angular. It is found as small grains or irregular semimassive patches within pieces of milky white quartz. Some pieces displayed cavities with slightly worn quartz crystals. Reddish hematitic staining of these fragments is common. These placers are recovered from the channel and the gravels on the southern bank. A less important second type of gold is found near bedrock. This type is well worn and rounded with little or no quartz. Disseminated cubes of pyrite up to 0.5 centimetre square are found in the argillites beneath these placer golds. Assays of the pyrite recovered as placers contained approximately 34 grams of gold per tonne of pyrite concentrate.

A north trending shear zone was found in argillite several hundred metres upstream from the confluence near the south bank of Wright Creek. This zone contained crushed quartz material and one large quartz vein ranging from 0.8 to 3.7 metres in width. No significant gold mineralization was found within this zone, although significant silver mineralization was (see Eagle, 104N 047).

Nuggets of well-worn chromite were found in the channel of Wright Creek for approximately 500 metres upstream from its confluence with Eagle Creek.