The July prospect is located in the head waters of Silverdaisy Creek, on the southwestern side of Silverdaisy Mountain.
The area is underlain by steeply dipping and tightly folded rocks of the Lower and Middle Jurassic Ladner Group. In the area of interest, these are mainly argillites and siltstones with minor greywacke and felsic tuff. Intruding this package is the Invermay stock, a medium-grained diorite to granodiorite body thought to be Oligocene. Numerous dikes and sills ranging from diorite to pyroxenite also intrude.
The rock exposed in the workings is quartz diorite, similar to that of the adjoining Invermay deposit (MINFILE 092HSW002), and the geological setting is considered to be the same. Sulphides, principally sphalerite, arsenopyrite and chalcopyrite, occur with fine-grained quartz in narrow widths, generally following the walls in zones of shearing or fracturing. The average strike of these zones is east of north with a steep dip to the east. The adits expose lenses of quartz and sulphides or gouge seams from a few centimetres up to approximately 30 centimetres thick. A 15-centimetre sample, taken across zinc-rich material at the hangingwall in the lower adit, assayed 2.06 grams per tonne gold, 161.14 grams per tonne silver, 0.6 per cent copper and 4.9 per cent zinc (Minister of Mines Annual Report 1938, page F27).
Two other mineralized breccia zones near the July adit have been identified. 1.) The Camp breccia is described as a hornfelsed area of fracturing within the Invermay stock and adjacent sediments. Alteration includes sericite, chlorite, tourmaline replacement and limonite staining with disseminated and fracture controlled pyrite, pyrrhotite, minor chalcopyrite and trace molybdenite. 2.) The Pass breccia is described as an area of fractured and weakly brecciated sedimentary rock in contact with the Invermay quartz diorite. Mineralization consists of minor pyrrhotite, pyrite and chalcopyrite with patches tourmaline and magnetite.
The July claims were located in 1935 and have been explored as part of the Giant Copper (MINFILE 092HSW001) and Invermay (MINFILE 092HSW002) occurrences. These occurrences were discovered in the early 1930’s. The two properties were consolidated in 1956 by Canam Mining Corp. Between 1955 and 1963, several companies optioned the property and carried out exploration and development programs on the area. After a two year option, Giant Mascot Mines Ltd. purchased all of Canam's assets in 1966. Giant Mascot Mines Ltd. continued work between 1966 and 1972. The property lay dormant again until 1988, when Bethlehem Resources Corp. acquired it from Campbell Resources Inc. (formerly Giant Mascot Mines Ltd.). Between 1988 and 1990, a comprehensive exploration and evaluation program was carried out. In 1996, Imperial Metals completed a program of diamond drilling (13 holes, totalling 3457 metres) and 658.8 line-kilometres of airborne geophysical surveys on the area with the aim of establishing a second open-pit resource Giant Copper property (MINFILE 092HSW001). No further exploration work is reported until 2015, when a program of soil and rock sampling was completed.
