The Buse Lake hydromagnesite showing occurs near the east end of Buse Lake which lies about 22 kilometres east of Kamloops.

The material lies in a depression which is about 430 metres long and 60 to 125 metres wide. Auger drilling indicated a hydromagnesite thickness of 30 to 76 centimetres which is overlain by 25 to 75 centimetres of drift material. A sample, which may have been contaminated by the overlying drift material yielded the following analytical results: 34.2 per cent MgO, 1.76 per cent CaO, 3.91 per cent Fe+Al, 20.74 per cent insoluble, 0.07 per cent MnO, 0.05 per cent SO3, 6.56 per cent H2O and 38.45 per cent loss on ignition. The sample contains 77.9 per cent hydromagnesite based on the MgO content (Geological Survey of Canada Memoir 249).

Buse Lake is also reported to contain a sodium carbonate brine with 2.37 per cent total solids and a specific gravity of 1.023. The solids are composed of 75.5 per cent Na2CO3, 3.4 per cent NaCl, 18.9 per cent Na2SO4 and 2.3 per cent MgSO4 with a trace of CaSO4 (Bulletin 4).