The Jo 30 occurrence is situated near the headwaters of Quartzite Creek, approximately 25 kilometres northeast of Takla Landing. The showing was located in 1983 during a regional exploration program carried out in the Vital Range.

The upper Quartzite Creek area is underlain by intercalated phyllite, cherty argillite, andesitic flows and tuff, and minor limestone all assigned to the Carboniferous to Jurassic Cache Creek Complex. These units strike north to northwest, with predominantly steep westerly dips. Bedding and foliation are parallel to subparallel and both large and small-scale folds are widespread. Evidence suggests that the rocks have undergone greenschist facies metamorphism.

Locally, small, often lenticular masses of grey, rusty weathering felsitic and white to pink aplitic intrusions have been emplaced into the Cache Creek Complex members.

Minor skarn(?) mineralization developed around one such intrusion was observed to host chalcopyrite, pyrite and manganese oxide (psilomelane?) as well as quartz veinlets. A grab sample (RE-0072) of this material assayed 2.85 grams per tonne gold (Assessment Report 12547). Two other samples of similar mineralization yielded only background precious metals.