The 330 Colour occurrence area is underlain by sedimentary rocks of the Upper Triassic Stuhini Group. Basalts of the Tertiary to Quaternary Mount Edziza Complex cap the Stuhini rocks to the south.

The 300 Colour zone is located approximately 400 metres west of the Central Zone, with the main outcropping area occurring along an old road. The roadcut contains a 5 metre-wide west-dipping monzonite dike, with mineralized veins above and below the dike. The 300 Colour zone is considered to be separate from the Central Zone.

Limited mapping in 2015 indicates that mineralization occurs as quartz-arsenopyrite veins enclosed in heavily sheared and altered tuffaceous volcanic rocks. Rock fabrics in the area trend approximately 150 degrees to 160 degrees and dip moderately to steeply west. Strong topographic lineaments were noted on 2016 LiDAR which trend sub-parallel to the measured local fabric. The 2016 IP geophysical survey identified a northwest trending elevated chargeability zone extending greater than 700 metres from the Central Zone northwesterly through the 300 Colour Zone and is open to the northwest. Soil sampling in 2015 showed that the 300 Colour Zone to be one of the strongest geochemical anomalies on the Spectrum property, with consistently high gold-silver-antimony-lead values over an area of about 400 by 150 metres.

1990 trenching in the Road Trench, as well as Trenches 6, 7, and 11 to 15, within the corridor defined by the IP geophysical survey uncovered broad zones of elevated gold mineralization. Drilling in 1990 beneath Trench 06 (S90-44) yielded two high-grade intervals of 5.48 grams per tonne gold over 2.1 metres and 29.45 grams per tonne gold over 0.35 metre (Assessment Report Number 20861).

In 2015, two diamond drillholes, S15-066 and S15-068, were drilled to follow-up the results in Trench 6 and hole S90-44, Figure 13-5. Drillhole S15-068 was collared about 60 metres southwest of S90-44 and drilled a section about 50 metres down-dip of S90-44. S15-068 intersected the same low-grade interval as that seen in S90-44, though at a lower grade of 0.5 gram per tonne gold over 22 metres (Assessment Report 36675). Closer to surface, and to the west of S90-44, S15-068 intersected a second zone of mineralization averaging 1.14 grams per tonne gold over 54 metres (Assessment Report 36675). Both intersections are contained within one broad zone of elevated gold mineralization grading 0.77 gram per tonne gold over 104 metres. Copper assays are generally low. Drillhole S15-066 tested the northwest strike extent of Trench 6 mineralization plus tested down dip of the Road Trench. This drillhole intersected 4.64 grams per tonne gold over 2.0 metres within a wider zone of 0.81 gram per tonne gold over 23 metres along strike from Trench 6 (Assessment Report 36675).

Refer to Spectrum (104G 036) for details of a common property work history and geology.