Three stratigraphic assemblages have been mapped in the area: (1) Upper Palaeozoic sediments and volcanics of the Stikine Assemblage, (2) clastic sediments of the Triassic Stuhini Group, and (3) Lower Jurassic sediments and volcanics of the Hazelton Group.

Four plutonic suites intrude the above; (1) Late Triassic calc-alkaline intrusions coeval with Stuhini Group stratigraphy, (2) Jurassic Copper Mountain, (3) Jurassic Texas Creek and (4) Tertiary Coast Plutonic suite.

The Tillerman showing was discovered in 1991, 300 metres east of the SMC Showing by follow-up prospecting from soil and VLF (very low frequency)-EM surveys. Two drill holes were completed in 1991 with low results. Hand trenching yielded high zinc and locally high lead and copper values. Mineralization consists of pods, lenses and stringers of massive to semi-massive sulphides hosted by a locally brecciated and silicified intermediate volcanic. Pyrite is the dominant sulphide (up to 40 per cent) with lesser sphalerite, chalcopyrite and galena. Gold and silver values are typically low (less than 0.5 gram per tonne gold). The best sample assayed 0.6 gram per tonne gold, 32.6 grams per tonne silver, 3.03 per cent lead, 9.11 per cent zinc, and 1.14 per cent copper (Assessment Report 29673). The soil anomaly is much bigger than the showing. Overlapping anomalous patterns of individual metals measures roughly 200 by 500 metres. The showing is located at the southeastern limit of a 700 metre long VLF-EM anomaly and is also associated with a weak HLEM (horizontal loop electromagnetic geophysical survey) anomaly approximately 100 metres long.

Refer to Johnny Mountain (MINFILE 104B 107) for related details and common property work history.