The Lake showing is underlain by Devonian to Permian Stikine Assemblage rock which, nearby, is overlain by Upper Triassic rock of the Stuhini Group. The stratigraphy is intruded by Triassic to Tertiary stocks of the Coast Plutonic Complex.

The showing is hosted in a black, graphitic, thinly-bedded limestone unit that is in fault contact with a narrow (1 to 3 metres) white silicified limestone.

Mineralization is restricted to black graphitic and white limestone units and occurs in either narrow calcite breccia veins in the graphitic limestones or disseminated in the white limestone along the contact with the graphitic limestone. Sphalerite, galena and tetrahedrite occur as disseminations in narrow (less than 20 centimetres) calcite breccia veinlets within the black graphitic limestones. These veinlets, although narrow and short (less than 5 metres) are fairly common within 50 metres of the fault structure. In places the mineralization becomes massive tetrahedrite (plus/minus galena and sphalerite) up to 0.5 metre wide although it pinches out quickly along strike,

The other area of mineralization is along the fault contact. Disseminated tetrahedrite, sphalerite and galena occur along the fractures in the graphitic limestone and disseminations in the white limestone just along the contact. Mineralization can be traced over a distance of 100 metres from the valley floor where outcrop begins to a cliff in the creek just below the lake where further access is reported to be impossible.

Approximately 10 metres below and 30 metres east of the main trenches on a cliff face a one metre channel sample (#91030) was taken across a fine grained sheared zone in the graphitic limestone. Assays ran up to 678.86 grams per tonne silver, 6.5 per cent zinc and 2.7 per cent lead (Assessment Report 19969). Gold values in all samples taken from the Lake Showing were low.

Work History

In 1963, Granduc Mines held the the Jon group of 12 claims which were located at the head of the east fork of the Inhini River. On the property, a quartz vein ranging from 1.2 to 2.4 metres in width was reported to be erratically mineralized with tetrahedrite. The location is vague.

In 1989, Corona Corporation prospected the MAC 1, 2, ZIP 1 and 2 claims (of the Inhini property) and collected 24 heavy mineral, 19 silt and 163 rock samples (Assessment Reports 19972). In 1990, Link Resources Inc carried out a 700-kilometre airborne Mag and EM survey over the entire Inhini Property (Assessment Report 20972).