The Molly B. occurrence is located on the east bank of the Bear River, 0.5 kilometre east of the main runway of the Stewart Airport. Various siliceous skarn zones have been explored in this area since 1910. The Molly B. was located in 1935 and in 1936, Premier Mining Co. drilled seven holes. In 1939, the Stewart Canal Mining Co. took over and produced until 1941. Minor development and drilling took place in 1947 and 1948.

The occurrence consists of at least two skarn zones, developed in hornfelsed and variably schistose argillites, tuffs, quartzites and minor limestone of the Lower Jurassic Unuk River Formation (Hazelton Group). These beds, intruded to the south and north by Eocene granodiorite of the Hyder pluton (Coast Plutonic Complex), generally strike 125 degrees and dip between 60 and 90 degrees southwest. A few granitic dikes crosscut the sequence.

A skarn altered limy siltstone bed within thin-bedded siltstone, striking 120 degrees and dipping 65 to 75 degrees southwest, has been traced southeast from the east bank of the Bear River for 30 metres. The limy beds vary in thickness between a few centimetres and 3 metres, averaging between 1 and 1.8 metres. Mineralization consists of scheelite and disseminated molybdenite, pyrite, chalcopyrite, pyrrhotite and sphalerite in a gangue of diopside, garnet, epidote and minor calcite. A 163 kilogram sample of hand-sorted ore averaged 4.2 per cent molybdenum, 1.5 per cent tungstic oxide (WO3) (1.2 per cent tungsten) and 0.4 per cent zinc (Bulletin 10, page 55). A 1.68 metre channel sample across the skarn zone assayed 0.37 per cent tungstic oxide (0.29 per cent tungsten) and 0.17 per cent molybdenite (Bulletin 10, page 55).

South of the scheelite-molybdenite skarn, approximately 300 metres, a zone of silicification and skarn alteration occurs in argillite. This zone, containing bands of epidote and garnet, parallels bedding, has been traced for 195 metres and varies from 1 to 5.2 metres in width. It contains stringers, bands and lenses of quartz with disseminations, stringers, blebs and massive patches of pyrrhotite, chalcopyrite, pyrite and trace sphalerite. The mineralization becomes more intense where the zone is cut by narrow shears and cross fractures which strike 026 to 031 degrees and dip 45 to 90 degrees northwest. A composite chip sample over a length of 14.0 metres and an average width of 2.7 metres assayed 3.4 grams per tonne gold, 10.3 grams per tonne silver and 0.8 per cent copper (Minister of Mines Annual Report 1937, page B5).

Between 1940 and 1941, 290 tonnes were mined from the precious metal-bearing zone with an average grade of 2.36 grams per tonne gold, 12.01 grams per tonne silver and 0.716 per cent copper.

A portion of the claim group, the Molly B. claim, was originally named the Oral M group and hosts the majority of the known mineralization on the claims. It was located in 1935 by the Premier Mining Co. along strike from another mineralized zone at river level called the Molly B. The Molly B., now covered by I.R. 19, was located in 1915. In 1936, the surface trace of the silicified auriferous sulphide zone of the Oral M was stripped, trenched and seven small diameter diamond-drill holes were completed. In 1937, Premier Mining drove roughly 84 metres of drift at the 200 metre-level. Premier Mining dropped the property in 1938 and the Stewart Canal Gold Mining Co. took over the operation and shipped a small amount of ore. In 1940, a small "Gibson" mill was set up on the east bank of the Bear River below the workings and an aerial tram set up. The milling attempt failed because the Pelton wheel in the river failed to deliver sufficient power. The property lay dormant during the war years. In 1947, a lower adit at the 153 metre-level was driven on the Oral M structure for a distance of 88 metres. The zone exposed at the face was reported to be 3.4 metres wide but assays returned low values. In 1948, seven small diameter underground diamond-drill holes were completed from the 153 metre-level. Core recovery was poor and the results were inconclusive. In December 1988, the property was offered to Fleck Resources Ltd. by D. Javorsky. A fifty per cent interest would be given to Fleck Resources in return for funding the opening of the 200 metre-level of the Oral M workings and conducting a surveying and sampling program. This work was completed in January of 1989. In October 1989, Fleck Resources conducted a surface transit survey and a sampling program on the Oral M workings and a wider scale prospecting, mapping and sampling program along the western margin of the claims. In 1999, L.E.H. Ventures Ltd. optioned the property. During 2005 through 2010, Auramex completed programs of prospecting, geological mapping, geochemical sampling and airborne geophysical surveys on the area as the Bear River-Surprise Creek property.