The Strohn Lake occurrence is about 1 kilometre northwest of the northwest tip of Strohn Lake, approximately 27 kilometres northeast of Stewart.

Regionally, the area is underlain by a sequence of Jurassic clastic and volcanic rocks of the Hazelton Group which trend north to northwest and are intruded by felsic stocks and dikes and/or sills to the west. The area is dominated by a major anticline, which displays eastern vergence. Reddish to maroon andesitic volcaniclastic and volcanic rocks of the Betty Creek Formation are located close to the anticline’s axial plane. To the west and east of the anticline’s axis there are felsic rocks of the Mount Dilworth Formation(?). They form a horizon, 70-200 metres wide, composed of apple green, light grey or white coloured felsic volcanic rocks which include flows, intrusions and pyroclastic rocks. Large gossans are related to sericite alteration and subsequent infusion of quartz and sulphide mineralization and it is speculated that the alteration is associated with the abundant intrusive rocks in the area. In these sericitic zones it is very difficult to differentiate between altered intrusive and felsic volcanic rocks

The Strohn Lake showing is underlain by andesitic volcanic rocks of the Lower Jurassic Unuk River Formation (Hazelton Group). A grab sample (A05-315) from a jasper-quartz horizon, 1.5 to 2 metres wide with 1-2 per cent pyrite and trace malachite yielded 16.8 grams per tonne silver and 0.15 per cent lead (Assessment Report 27981). The horizon consists of finely banded jasper and quartz (millimetre-scale) which very often are strongly deformed to brecciated; bedding strikes 080 degrees with steep northern dips. About 500 metres south of this sample site, a grab (A05-313) from a zone a few metres across of strongly fractured to brecciated rock cemented by very fine grained pyrite comprising 20-25 per cent of the rock assayed 22.1 grams per tonne silver (Assessment Report 27981). The rock most likely represents a hydrothermal breccia composed of very strongly silicified angular fragments 1-5 centimetres across, cemented by pyrite.

In 2005, Pinnacle Mines Ltd. conducted an exploration program on their Surprise Creek property and a total of 279 rock and 8 silt samples were collected.