The Breccia trend is located in a small southeast facing valley, north of Slim Creek and approximately 10.5 kilometres west- southwest of its junction with Leckie Creek.

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. This is near the western edge of the Miocene Bridge River Pluton.

The Breccia trend consists of a deeply weathered, silicified, gossanous breccia and several smaller gossans. It has an open ended strike length of approximately 5.0 kilometres.

Locally, the zone is exposed over an area of approximately 150 by 500 metres and consists of 30 to 50 metre wide vuggy silicified zones in contact with a north-northwest trending dioritic dike. These zones are characterized by intensely silicified, pebble to cobble- sized, sub-rounded to sub-angular, fine-grained intrusive rock fragments cemented by a vuggy siliceous groundmass. Anastomosing quartz veinlets with copper sulphides (chalcopyrite?) cross cut both fragments and groundmass.

In 2012, two grab samples (M487778 and M487779) assayed 0.174 and 0.211 per cent copper, respectively, with elevated levels of arsenic, indium, antimony and zinc (Assessment Report 33341).

At this time, other grab samples (M487761 and M487775) taken from gossanous boulders located 4 kilometres to the south-southeast assayed 0.215 and 0.06 per cent copper, respectively, while another two samples (M487751 and M487752) from gossanous boulders located 6 kilometres to the east assayed 0.871 and 0.641 per cent copper, respectively.

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 northeast 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.