The Tillworth trend occurrence is located in the western head waters of Slim Creek, at an elevation of approximately 2150 metre and approximately 70 kilometres northeast of Pemberton. The Tillworth anomaly was found in 2012 by Miocene Metals Inc.

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 approximately 13 kilometres.

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 to the west led to the discovery of the Bornite trend; sampling to the north led to the discovery of the Tillworth trend, extending approximately 13 kilometres and sampling to the north east identified the Breccia trend. Together with the original discovery and Mackenzie (MINFILE 092JW 043) occurrences these define a zone of mineralization that extends approximately 12 kilometres outwards from the contact of the Miocene Bridge River Pluton. The drill program focused on the Mackenzie showing.