The area is underlain by Upper Triassic Hickman batholith quartz monzonite to monzodiorite. Mineralization occurs in a northwest and northeast trending fracture/joint set and north trending faults and fractures.

The Jay showing consists of fault-related magnetite and chalcopyrite mineralization, within the Hickman Batholith. The fault zone is characterized by a central zone of massive magnetite (up to 60 per cent) and chalcopyrite (5 to 20 per cent) and minor pyrite with brecciated fragments of batholithic rock. The faults grade laterally into a zone of clast-supported Hickman breccia cemented by magnetite and quartz. Peripheral to the fault zone, magnetite stringers locally penetrate the Hickman intrusive rock. The faults trend north-northwest, with moderate to steep east dips, and are brittle and discontinuous in nature. The mineralized fault zones never exceed 3.5 metres in width or 20 metres in strike length.

Representative grab samples of these structures assayed up to 2.85 grams per tonne gold and 4.59 per cent copper (Assessment Report 21061). A high grade grab across 1.2 metres yielded 24.1 grams per tonne silver, 2.7 grams per tonne gold and 8.9 per cent copper (Assessment Report 18555).

Mineralization consists of massive magnetite-quartz-tourmaline-chalcopyrite-pyrite veins and shears that range in width from less than 0.5 to 10.5 metres. Zones can be traced on surface in excess of 50 metres. The veins and shears are enveloped by potassic altered wallrock which grades outward into a weak phyllic zone and abruptly into a propylitic alteration zone. Mineralized zones are commonly marked by abundant malachite staining, as well as jarosite, goethite and manganese oxide.

However, it was reported in 1990 that the discontinuous nature of the mineralization and faulting was reported to limit the potential of the showing.

Work History

A group of 126 claims were held in 1965 by Phelps Dodge Corporation of Canada, Limited. Work included geological mapping, and the drilling and blasting of 12 trenches totalling 398 metres. The area was worked as part of the Trophy property from 1988 to 1990. Refer to Trophy (Ptarmigan) (104G 053) for related details and a common work history.