The Sand Creek occurrence is a bed-like body of hematite, with pyrite at one exposure, hosted by quartzites and argillites of the Helikian Gateway Formation (Purcell Supergroup). The strike of the mineralization is generally 130 degrees with a dip of about 50 degrees (southwest) corresponding to the local stratigraphy. The hangingwall is a grey, fine-grained quartzite with the contact with the underlying hematite zone marked by slickensides.

The hematite is massive, 30 to 90 centimetres thick, and is exposed in three localities. The hematite hosts small highly fractured quartz veins and appears to contain considerable finely disseminated quartz. Locally the hematite zone has associated limonite and pyrite. The footwall consists of sheared argillites which are highly crumpled and sheared with abundant iron staining and a clay-like appearance. The hematite horizon is sheared within the plane of the stratigraphy and is also cut by high angle faults with various trends which may mask the strike extensions of the horizon. At one location a sample across 1 metre graded 52 per cent iron and 22.6 per cent silica; a second location graded 57.4 per cent iron and 15.6 per cent silica across 30 centimetres (Minister of Mines Annual Report 1919, pages 116, 117).

The geological setting suggests a bedded origin for the hematite, but an epigenetic or replacement mode of origin cannot be discounted.

WORK HISTORY

In 1971, soil grid survey was conducted for Rio Alto Exploration Ltd. on their Sand Creek prospect (Area B), southwest of Sand Creek Iron prospect. The survey located one major area of interest with coincident values in copper, lead, zinc, and silver. The soil grid was completed over or near the Mountain (082GSW047), Jessie (082GSW014), Peacock Copper (082GSW017), and Don (082GSW048) areas. No mention of iron was made.

In 1982 an airborne electromagnetic and magnetic survey was carried out over large parts of the Bull River property on behalf of owner/operator R.H. Stanfield. Eight target areas were identified (Assessment Report 10570). The Dogwood 11 claim that contains the occurrence was part of the surveyed area.

In 1992 a helicopter borne DIGHEM survey over the Balsam, Cedar and Dogwood claims of R. H. Stanfield (Bul River Mineral Corporation Ltd.) was completed but appears to be just to the southwest of the Ross 2 occurrence (Assessment Report 23012). In 2017, an NI43-101 technical report for Purcell Basin Minerals Inc. processed and published Dighem airborne survey data from 1991-1997 surveys (Assessment Report 37195).