The TILLWORTH occurrence is located on north-facing alpine slopes in the western headwater region of Slim Creek, 1 kilometre north-northwest of Slim Mountain, at an elevation of approximately 2165 metres. The site is approximately 30 kilometres west-northwest of the village of Gold Bridge.

The area is underlain by biotite-hornblende-quartz-diorite of the Hurley River Pluton, which is assigned to the Late Cretaceous Scuzzy Plutonic Suite of the Coast Batholith.

Mineralization at the Tillworth occurrence and along the Tillworth Trend includes 10 to 30-centimetre lenticular quartz veins and stringers with clots and blebs of chalcopyrite, pyrite and malachite ±azurite ±bornite ±molybdenite. The Tillworth Trend extends for greater than 7 kilometres southeast of the Tillworth showing and includes Tillworth Central, MacKenzie, Discovery and SC2 occurrences.

In 2012, a grab sample (M487862) assayed 17 per cent copper, 0.186 gram per tonne gold and 78 grams per tonne silver (Press Release, Miocene Metals Inc., September 13, 2012).

In 2010, Miocene Metals Inc. optioned the property and completed 1227 line kilometres of combined airborne magnetic and gamma ray spectrometer surveys over area. The following year, a minor rock sampling program was completed. In 2012, Miocene Metals Inc. expanded the MacKenzie property from 36.3 square kilometres to 299.03 square kilometres, and followed the expansion with a program of geochemical sampling and a two-hole drill program. Sampling in the west led to the discovery of the Bornite trend; sampling to the north led to the expansion of the Tillworth Trend, and sampling in the northeast identified the Breccia Trend. The drill program focused on the Mackenzie showing, 6 kilometres southeast of the Tillworth occurrence. Miocene's exploration focus in 2013 was on the Bornite Trend.

From 2015 through 2018 Carube Copper Corp's exploration efforts of mapping, geochemical sampling and an airborne magnetic radiometric survey focused on the Bornite Trend and then in 2019 focus was on areas within the Bornite Trend and also areas of the Breccia Trend. The Breccia Trend was again the focus in 2022 under the newly named Mount Olympus property, operated by PrometheX Ltd.