The Zorka showings occur on the west bank of the Kitsault River, 17.5 kilometres due north of Alice Arm.

The region is underlain by a volcanic-sedimentary sequence of Upper Triassic Stuhini Group and Lower Jurassic Hazelton Group rocks. These are folded into a northwest trending anticline/syncline pair.

The showing consists of several occurrences exposed in two adits. In the upper adit, a northwest dipping 0.3 metre wide quartz vein is exposed in argillite, siltstone and tuffaceous wacke of the Stuhini Group. The vein and hostrocks, striking 028 degrees and dipping 75 degrees northwest, are cut by several hornblende porphyritic dikes from 0.6 to 1.5 metres wide. Mineralization consists of pyrite and trace chalcopyrite in quartz gangue.

The lower adit exposes calcite stringers mineralized with chalcopyrite. A vein, outcropping in the vicinity of this adit, contains a 0.3 metre wide section heavily mineralized with pyrite and chalcopyrite.

In 1926, two tunnels have been driven. One is at the level of the railway track and is in 11 metres and another about 3 metres lower, below the railway, has been driven 6 metres.