The Boundary showing is located on the Boundary Crown Grant (Lot 2314), on Myrtle Creek, northwest of the Indian Mine (104B 031) and south of the Big Missouri deposit (104B 046), 25.0 kilometres north of Stewart, British Columbia. Initial exploration on the property started in 1911. The Boundary crown grants were amalgamated with the Indian and Payroll groups in 1957 to New Indian Mines Ltd. Esso Resources Canada Ltd. has recently investigated the area. For a more extensive geological description and bibliography refer to the Indian Mine.

The property is located in the Intermontane Belt, bounded on the west by the Coast Crystalline Complex and on the east by the Bowser Basin, in the volcanic arc assemblage of the Stikinia Terrane.

The deposit is hosted by Upper Triassic to Lower Jurassic Hazel- ton Group Unuk River Formation metavolcanic rocks. The Hazelton Group is a northwest trending steeply east dipping belt of folded andesitic lapilli tuffs, flows and breccia containing a thick seq- uence of argillites and siltstones infolded along a synclinal axis. This sequence is intruded by the Early Jurassic Texas Creek pluton- ic suite of dacitic porphyry dykes and granitic Eocene Hyder intrusions.

Mineralization was emplaced in en echelon fracture sets in a silicified shear zone (Indian fault system). This vertical zone, up to 7.0 metres wide striking 170 degrees, can be traced for 190 metres and has been exposed in four open cuts and an adit. These mineralized zones have narrow bands of sericitic alteration.

The showing consists of veinlets, streaks and blebs of disseminated fine-grained pyrite, chalcopyrite, bornite, sphalerite and galena.

Mineralization in this area is considered to be late-stage infilling of fault breccia in young fault zones with coarse comb textures common. No early-stage precious metal rich chalcedonic quartz stockworks, similar to the Big Missouri deposit, have been noted on the property. Mineralization in this area is considered to be distinct and considerably later than the Big Missouri and Silbak Premier mineralization.

A sample taken over 3 metres from cut #2 in 1936 assayed 1.7 grams per tonne gold, 103 grams per tonne silver, 1 per cent copper, 3 per cent lead and 7.5 per cent zinc (Minister of Mines Annual Report 1936, pages 13,14).

During 2004 through 2019, the area has been explored as part of the Silver Coin property and a complete property exploration history can be at the nearby Silver Coin (MINFILE 104B 150) occurrence.