The Moonbeam 5-6 occurrence is located on a ridge east of Monashee Pass, at an elevation of approximately 1550 metres.

The area is underlain by Devonian to Triassic metavolcanics and metasediments of the Harper Ranch Group, a short distance north of the contact with Jurassic granitic rocks of the Nelson Intrusions. These consist of interdigitating lenses of fine-grained, altered volcanics and metasediments. The volcanics are possibly meta-andesites and the metasediments consist of argillites and marbles. The sediments strike west to northwest and dip steeply to moderately north.

The intrusive rocks consist of medium- to coarse-grained, leucocratic hornblende biotite granodiorite. The generally fractured granitic rocks are locally heavily sheared and altered. The degree of kaolinization and chloritization is relative to the degree of deformation. The contact with the metamorphic rocks trends northwest.

Locally, two short adits were driven on a strong northwest-trending shear that cuts highly silicified and carbonatized volcanics and contains irregular quartz veins and pods. These are weakly to moderately pyritized and contain rare chalcopyrite and galena.

In 1983, a composite grab sample (no. 9870) assayed 0.49 per cent lead, 132 grams per tonne silver and 0.27 gram per tonne gold, while a 1.1 metre chip sample (no. 9873) assayed 1.80 per cent lead, 5.26 per cent zinc, 44.1 grams per tonne silver and 1.2 grams per tonne gold (Property File - Nakusp Resources Ltd. [1983-12-20]: Report on Geochemical Survey and Reconnaissance Mapping - Monashee West Group).

On the Vernon claim, approximately 700 metres north, pyritic, rusty andesite sills occur in marble. In 1983, a grab sample (no. 9871) assayed 10.3 grams per tonne silver (Property File - Nakusp Resources Ltd. [1983-12-20]: Report on Geochemical Survey and Reconnaissance Mapping - Monashee West Group).

The area has been historically explored in conjunction with the nearby Monashee (MINFILE 082LSE001) past-producing mine with the development of two adits in the late 1800’s or early 1900’s. In 1983, reconnaissance geochemical sampling and geological mapping surveys were done on the Monashee and McPhail properties and the Moonbeam claims by I.M. Watson and Associates Ltd. for Nakusp Resources Ltd.