The area of the Northern Sunsets showing is underlain by granodioritic quartz feldspar porphyry of the Late Cretaceous Bulkley Plutonic Suite.

In 2008 and 2009, it was reported by Lions Gate Energy that in 1990 and 1991, Skeena Resources had found significant copper in rock (up to 0.59 per cent copper) at one particular location in the north to northeastern area if the Sunsets stock (Assessment Report 30731 and 31515). Lions Gate could not determine the exact location but reported that a line of 5 talus fines from below the approximate area in 2008 yielded elevated copper-molybdenum results up to 237 parts per million copper and 21 parts per million molybdenum; these samples, W-S 1 to 4 and S-BD01, are indicated on Figure 8 of Assessment Report 30731 and 31515.

The area in question may be that of float samples BR-01 to BR-04 (as shown on Map 1, Assessment Report 21765) though the 2008 talus fines appear to be farther south and closer to sample MR-200 that yielded 0.13 gram per tonne gold, 3.6 gram per tonne silver, 0.19 per cent copper. MR-200 consisted of fractured andesite that was quartz flooded with quartz containing 5 to 10 per cent disseminated magnetite and pyrite (Assessment Report 21765).

Refer also to King (093L 041) for general information on the El Toro property, a large property that was worked by of Lions Gate Energy Inc from 2007 to present (2015) and encompassed the Sunset Basin which contains the Fly and Fog.

Refer to Fly (093L 045) for related details.