The Lumberton occurrence is located near Palmer Bar Creek, approximately 4.2 kilometres east of Negro Lake.

The area lies within the central portion of the Purcell Anticlinorium, which consists of argillites, quartzites and related intruded gabbro sills and dikes of the Helikian Aldridge Formation (Purcell Supergroup).

The Lumberton showing is poorly documented as to mineralization but may contain thin lenses of sulphides along bedding surfaces within thinly bedded argillaceous quartzite of the Helikian Middle Aldridge Formation (Purcell Supergroup). The area is also host to a large Proterozoic Moyie Intrusions diorite sill, so this showing may be a contact-related concentration of sulphides typical of other lead-zinc sulphide occurrences in the area.

Minister of Mines Annual Report 1943 indicates that an old shaft was dewatered for a check on tungsten mineralization. No record was found of the shaft origin.

In 1966 and 1967, Placid Oil completed a geological mapping, an induced polarization survey, a ground magnetic survey, and a ground electromagnetic survey in the area (Assessment Report 1174). In 1978, Cominco completed a program of geological mapping on the area in-conjunction with the Vine 1 (082GSW050) occurrence (Assessment Report 7087). In 1991, Cominco completed a 9.3-line-kilometre ground electromagnetic survey on the area as the Vine 42 claim (Assessment Reports 21827).

In 2013/2014, PJX Resources Inc began a large program of gravity and magnetic geophysical surveying to detect dense subsurface features (Assessment Reports 34082, 34937, 35416). The gravity survey extended 10 kilometres beyond the West Basin property claim boundaries encompassing several MINFILE occurrences including the Lumberton showing (Figure 8, Assessment Report 34082).