The Jo occurrence is located north of Johanson Creek, near the headwaters of the Ingenika River (Assessment Report 4593). It lies approximately 13 kilometres west-northwest of Johanson Lake. This occurrence has similar regional geology to that of the Copper King occurrence (094D 149) which lies approximately six kilometres to the northwest.

Locally, the area is underlain by the Upper Triassic Savage Mountain Formation (Takla Group). It is overlain by the Lower Jurassic Telkwa Formation (Hazelton Group). These successions of predominantly volcanic rocks are intruded by an unnamed Early Jurassic quartz diorite intrusion. Stratigraphically, the oldest rocks are pyroxene porphyry flows overlain by bladed feldspar porphyry flows. These volcanics belong to the Savage Mountain Formation and are overlain by a mixed package of pyroclastics which include a well bedded water lain sequence, agglomerates, breccias and lapilli tuffs which may belong to the Telkwa Formation (Assessment Report 5256). These rocks are cut by quartz diorite intrusive bodies.

The strata dip gently to the west and are moderately fractured and jointed. The dominant joint attitude is 45 degrees dipping 85 degrees to the northwest with a secondary pattern trending 160 degrees dipping 75 degrees to the west (Assessment Report 4593). Local faulting and shearing generally trends to the northeast and to the west.

At the plotted location, copper mineralization occurs as bornite in epidote veins (Assessment Report 5256). The veins are hosted in bladed feldspar porphyry. Other epidote veins and epidote shears within 300 metres to the east of this occurrences contain chalcocite and bornite (Assessment Report 4593).

In 2014, Pacific Empire Minerals Corp. conducted a brief reconnaissance program on their Copper King claims. Sample 2086915, collected near or at the Jo occurrence (094D 153) was described as a fine-grained mafic volcanic with up to 2 per cent bornite blebs and disseminations with moderate malachite and chrysocolla. Moderate chlorite-epidote alteration is reported. The sample graded 3.06 per cent copoper, 0.446 gram per tonne gold and 21.4 grams per tonne silver (Assessment Report 35402).

WORK HISTORY

The Jo occurrence was documented by MINFILE in 1992 but was first discovered in 1973 by Canadian Superior Exploration Limited on their Z claim group (Assessment Report 4593). Work during 1973 by Canadian Superior included geological mapping and a reconnaissance geochemical survey comprising 80 soil and 40 silt samples over 6.4 line-kilometres. Silt geochemistry showed generally high copper background values in the 200 to 500 parts per million copper range (Assessment Report 4593). Numerous creeks were anomalous, particularly in the east-central and north-west portion of the Z claims. In addition, 80 soil samples were collected at 200 foot intervals along 5 reconnaissance lines and the samples were analyzed for copper. The results showed widespread copper mineralization, values ranging from 15 ppm to 660 parts per million with the anomalous threshold at 100 ppm copper (Assessment Report 4593). BP Minerals Ltd. optioned the Z claims in 1974 and continued work.

In 2014, a reconnaissance exploration program Pacific Empire Minerals Corp. was conducted on the Copper King property that consisted of rock sampling. One day was spent on the property at various locations. The 2014 work program confirmed the presence of copper-gold-silver mineralization on the property and the presence of widespread, propylitic alteration.

In early 2017, Pacific Empire completed ASTER data processing and analysis on the Copper King property, covering 4178.2 hectares (Assessment Report 36615). The survey covered all occurrences on the Copper King Property including D.S. (094D 004), Bornite (094D 037), Copper King (094D 149), Nika (094D 150), Ing (094D 151), Geni (094D 152) and Jo (094D 153).

In 2016 and 2017, airborne magnetic surveys were flown on behalf of Pacific Empire Minerals Corp over the Copper King Property totaling 109 line-kilometres (Assessment Report 36613, 36815). The survey covered all occurrences on the Copper King Property including D.S. (094D 004), Bornite (094D 037), Copper King (094D 149), Nika (094D 150), Ing (094D 151), Geni (094D 152) and Jo (094D 153).

See Copper King (094D 149) for related geological and work history details of the larger Copper King property which included the Jo occurrence and several other documented MINFILE occurrences.