In 1964, the Crown area was staked as the M.A.R. Group of claims by Purdex Minerals Limited. The claims fallowed from east to west, starting at Kitsumkalum Lake, along the north side of Maroon Creek for a distance of 8 kilometres to cover low-grade copper mineralization.

Sericite and hornblende schist of the Jurassic to Cretaceous Bowser Lake Group are intruded by a 50 metre wide diorite mass. Quartz veins mineralized with pyrite and chalcopyrite occur in the diorite and concordant with the metasediments underlying the diorite. The concordant veins are hosted within a 10 metre wide zone, which also contains disseminated chalcopyrite. A sample across the zone assayed 0.5 per cent copper and traces of gold and silver (Minister of Mines Annual Report 1918). The schists strike east and dip 40 degrees north.

The Maroon No. 1 showing, part of the M.A.R. Group, was described as one or more fracture zones containing quartz and fine chalcopyrite. The width of the zone varied from 3 to 9 metres and had been exposed over 75 metres. Two 1.5 meter chip samples across the zone assayed 0.60 and 0.98 per cent copper. Chip samples from outside of the zone varied from 0.11 to 0.58 per cent copper. Another similar showing, the Maroon No. 2, is reported to be located 800 metres to the west of the Maroon No. 1 showing (Property File Cyprus Anvil D.D. Campbell, 1964).