The JR showing is located at the northern end of the Sechelt Peninsula, between Earls Cove and Egmont, British Columbia. The zone of precious metal-bearing mineralization is exposed 770 metres east of Agamemnon Bay, 500 metres north of the west end of North Lake.
The earliest record of exploration in the area occurred in 1913 when R. Dunsford Jr. drove a tunnel (Stein adit, 092GNW061) near Earls Cove. In 1937, the Cambrian Chieftain (092GNE011) property was discovered 7 kilometres to the south. Additional massive sulphide mineralization was discovered in about 1952 at the Skookum (092GNE008), on the shores of Agamemnon Channel. Chalice Mining Inc. acquired the property in 1982 and since that time has conducted prospecting, geochemical and geophysical surveys, geological mapping, trenching and diamond drilling totalling 572 metres in 21 holes. In 1988, Blue Chip Resources Inc. conducted an exploration program to evaluate showings and outline potential drill targets, under an option agreement. In 1994, most of the claims covering the JR occurrence lapsed and were subsequently restaked as the Windancer claim group by Mr. and Mrs. LaRue.
The showing is regionally hosted in the Jurassic to Cretaceous Coast Plutonic Complex. Intrusions are mainly of quartz diorite, diorite and granodiorite composition. Northwest trending roof pendants of metamorphosed intermediate volcanic and sedimentary rocks have been correlated with the Upper Triassic Karmutsen Formation. The sequence has been intruded by numerous feldspar porphyry, diorite and andesite dikes. Dike swarms are prominent in the JR showing area, along the shoreline west of Earls Cove and at the eastern end of Nelson Island.
Hornblende biotite quartz diorite that locally grades into gabbro, diorite and granodiorite comprises hostrocks of the JR showing. These intrusive rocks have been intruded by younger feldspar porphyry rhyodacite, diorite and andesitic to basaltic dikes. Dike widths vary from a few centimetres to several metres. The dikes are associated with strong northwest trending, moderate northeast and weak west trending fractures. Overall, dikes have a strike of 283 degrees.
The JR showing consists of a number of closely spaced, mineralized zones: the JR zone, 3V zone, DF zone and TY zone. The TY zone has been buried by recent road building.
The JR zone consists of a series of subparallel quartz-marcasite- epidote stringer veins in altered and sheared granodiorite. The zone strikes 065 degrees over an exposed length of 20 metres and dips nearly vertical. Exposed widths vary up to 1.5 metres. The zone is cut by several narrow andesitic dikes.
Surface samples have yielded assays of up to 6.86 grams per tonne gold and 6.72 grams per tonne silver (Assessment Report 14736). Diamond drilling intersected a section of massive marcasite with electrum in quartz averaging 31.3 grams per tonne gold and 21.4 grams per tonne silver over a core length of 2.7 metres in drillhole 9 (Assessment Report 14736).
The 3V zone, consisting of a quartz vein stockwork and outcropping over a 30 by 5 metre area, lies 260 metres northeast of the JR zone. The stockwork consists of a number of subparallel anastomosing quartz-marcasite veins trending 080 to 090 degrees. Individual veins vary from 0.06 to 0.3 metre in width. A northwest trending, andesitic dike swarm offsets and complicates the mineralization trend. Samples from the showing have assayed up to 183.2 grams per tonne gold and 347.6 grams per tonne silver
A second quartz vein stockwork, the DF zone, is exposed for a length of 25 metres, 300 metres northwest of the JR zone. The showing consists of quartz veins with sporadic to abundant pyrite and marcasite, occasional galena and chalcopyrite, and minor tetrahedrite developed in a faulted andesitic dike and altered granodiorite. A chip sample taken across 2 metres assayed 46.96 grams per tonne gold and 83.0 grams per tonne silver (Assessment Report 14736).
The now buried TY zone has been described as a quartz flooded shear zone, 2.5 metres wide, striking 290 degrees and dipping steeply north. Several 20 to 50 centimetre wide quartz veins are reported in the hangingwall of the shear zone. The quartz veins host up to 10 per cent pyrite, chalcopyrite and other sulphides. A sample collected in 1988 from several pieces of mineralized rubble yielded 32.9 grams per tonne silver, 5.07 grams per tonne gold and 0.09 per cent copper (Assessment Report 20039).
