The Matajur (A Zone) occurrences are located north of Security Inlet on the west side of Mackenzie Cove.

The area is underlain by basalts and minor limestone of the Upper Triassic Karmutsen Formation (Vancouver Group), which have been intruded by quartz dioritic rocks of the Early Pennsylvanian Chaatl Inlet pluton.

Locally, two pods of massive sulphides, primarily pyrrhotite with lesser chalcopyrite, outcrop in a small steeply plunging gully along a shear zone striking 160 degrees and dipping 70 degrees east. The upper pod, located at 83 metres elevation, is 2 by 1.3 metres in size, whereas the lower pod, located at 30 metres elevation, is reported to be 2.4 metres across and comparable in height.

A pyritic zone outcrops over an area 5 by 15 metres in size, 30 metres north-northwest of the massive sulphide pod. The zone appears to continue for some distance to the southwest along a cliff face overlooking the northwest shore of Mackenzie Cove.

In 1963, a sample of outcrop from the lower showing assayed 3.3 per cent copper over 20 centimetres, whereas a previous sample from the upper showing is reported to have assayed 0.8 per cent copper (Property File - Cariboo Gold Quartz Mining Co. Ltd. [1963-10-09]: Preliminary Report - Hood, Rod, Bill and Young Showings).

In 1990, a channel sample (D3) taken over 1.3 metres of the upper massive sulphide pod assayed 1.44 per cent copper and 1.1 grams per tonne silver, whereas a chip sample (D4) taken across 5 metres of the pyritic zone assayed 0.37 per cent copper (Assessment Report 20330).

In 1992, a chip sample taken across 4.5 metres of gossanous outcrop assayed 1.0 per cent copper (Assessment Report 22952, Figure 3).

The Waddington Mining Corporation Limited held nine claims in this vicinity in 1953. In 1963, Cariboo Gold Quartz Mining examined and sampled the area. Placid Oil Company held the property as the Young and Rod groups in 1965. A geophysical survey was carried out at the time. The area was prospected and sampled by Doromin Resources in 1990. Inco Exploration and Technical Services flew airborne VLF and magnetometer surveys over the region in 1992.