The Bob Fraction claim is reported to be located on Mount Carpenter (Goat Mountain) near the Capello group (082KSW003) of Crown-granted claims (Minister of Mines Annual Report 1904), approximately 1 kilometre northeast of New Denver. Production in 1904 and 1905 totalled 24 tonnes, resulting in 113,028 grams of silver.

There is little information on the property, however, it is likely that it is an extension of the Capello vein system which consists of four or five parallel quartz-calcite veins in faults cutting quartz monzonite of the Mount Carpenter stock. The veins strike 025 degrees, dipping 35 to 40 degrees to the northwest. Vein widths average 15 centimetres, but reach 90 centimetres, which includes brecciated wallrock. Mineralization within the veins consists of tetrahedrite, argentite, native silver and pyrite, with gold apparently associated with the pyrite.

The host Mount Carpenter stock is mainly composed of biotite hornblende quartz monzonite (GSC Open File 432) of Mesozoic to Tertiary age. The stock intrudes Triassic Slocan Group fine grained clastic sedimentary rocks which include phyllite, argillite, quartzite, tuffaceous rocks and minor limestone.