The Mariposite occurrence is situated on Mariposite Creek, which drains into the Omineca River approximately 48 kilometres north-northeast of Takla Landing.

Although sedimentary rocks assigned to the Carboniferous to Jurassic Cache Creek Complex predominate in the area, the occurrence is reported to be associated with a small sill(?) of altered serpentinite, formerly assigned to the Middle Permian to Late Triassic Trembleur intrusions and now termed Mississippian to Triassic Oceanic Ultramafites.

Mineralization is reported to consist of crystals of cinnabar hosted by carbonatized serpentinite outcropping in Mariposite Creek (Geological Survey of Canada Memoir 252, page 171).

Although no recent information pertaining to this occurrence is available, it is likely similar to numerous other mercury occurrences related to the Pinchi fault zone (093N 008, 14, 17, 18, 19, 20, 21, 80, 142, 143, 146, 182).

In 1983, Golden Porphyritie conducted work on their Jo claims which covered Mariposite Creek, inclcuding the plotted location of the Mariposite cinnabar occurrence. Work done by Golden Porphyrite in 1983 consisted of Geological mapping and prospecting. An area of 40 square kilometres was mapped, 760 soil samples, 73 rock chip samples and 6 heavy sediment samples were collected. In 1984, Golden Porphyrite conducted further work including mapping and prospecting over an area of approximately 40 square kilometres. A total of 71 geochemical rock chip, 874 soil and 38 heavy sediment samples were collected.

The Grand North property was acquired by Amarc Resources Ltd. by staking in 2007. The property consisted of 26 claims covering an area of 11,683.71 hectares, stretching over 30 kilometres along the southwest side of the Ominica River An airborne magnetic gradiometer survey was flown over the property by in April 2007. The survey comprised 230.7 line km at a spacing of 200 metres. A series of west–northwest trending magnetic highs were outlined by the survey that likely reflect contrasts between volcanic and sedimentary rocks. In 2008 and 2009, Lysander Minerals and Amarc Resources completed programs of geochemical sampling, an induced polarization survey and 2 diamond drill holes, totalling 279.4 metres, on the area as the Pinchi property.

In 2009, Lund Gold completed a program of geochemical sampling, induced polarization and magnetic surveys and 4 diamond drill holes, totalling 682 metres, on the area as the Grab claims, apart of the Don-Don property. In 2011, Sointula Resources completed a program of photo-geologic interpretation and a 48.2 kilometre ground magnetic survey on the area as the DM claims.