The following historic description of production of the Rocher Deboule mine is from Sutherland Brown (1960)
who completed a geological mapping and compilation of the underground workings.
The Rocher Deboule
property was located in 1910 by Sargeant and Munroe of Hazelton, BC, which was acquired, in 1911, by Rocher
Deboule Copper Company of Salt Lake City, Utah.
Development on the property was done under lease by the
Montana Continental Development Company, a company owned by the principals of RDCompany.
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Ore was mined and shipped from the upper part of the No. 4 vein from April 1915, until February 1916, when the
property reverted to its owners. Development work, previously neglected, was done on the No. 2 and No. 4 veins
and by 1917 a 3100-foot (945 metres), known as the 1201, was driven from the bottom of the valley of Juniper
Creek to intersect all known veins.
Production in 1917-18 was largely from the No. 2 vein and was much less
than in the previous two years, although the copper-gold grade was good. The mine was closed in October 1918,
because of a lack of developed ore and a drop in copper price.
In 1929 the property was leased by Aurimont Mines Limited who mined and shipped some ore and in 1930
Hazelton Copper Mines Limited again leased the property but no production was done.
Production recorded from Rocher Deboule mine is given in Table 3a.
The mineralization is contained in a group of parallel veins striking in the order of north 75 degrees east and
dipping about 55 degrees north into the mountain. The main veins are numbered from Nos. 1 to 4 from south to
The outcrop elevations are in the order of 1372, 1454, and 1631 metres. A fifth vein, No. 2a, of similar
strike but flatter dip occurs between No. 2 and No. 3. No. 2 and No. 4 veins are the only veins significantly
developed and are the ones from which all production has occurred.
The veins are developed by three main crosscut levels include the 1200 (elev. 1270 metres), 1000 (elev. 1350
metres), and 300 (elev.1570 metres). The upper part of the No. 4 vein is developed by the 300 level and a winze
leading down to a flooded 500 level and to the 100-adit level above.
There is no development between the 500
level and the 950 level; the 950 level accesses the No, 2 at outcrop by a short adit.
The lower part of the No. 4
vein is reached by the long 1201 crosscut. No. 2 vein is developed by long drifts on the 1200 and 1000 levels and
three small sublevels, 950, 1050, and 1300; the 1300 is connected by winze to the 1200 level.
The small No. 2a
vein is reached by a crosscut on the 1000 level, and No. 3 vein is followed by a drift on the 1200 level. In total
there are over 1585 metres of crosscuts, approximately 915 metres of drifts on No. 4 vein, 1067 metres on No. 2
vein and 395 metres on all other veins. The amount of vertical development is small compared to the horizontal.
Southern Gold Resources Ltd acquired the property in 1987and performed surface geological mapping at 1:2500 scale, and underground mapping and sampling on the No. 2 and 4 veins. Additional surface exploration consisted
of geochemical soil surveys for gold, silver, arsenic, lead, zinc and copper, geophysical ground magnetic, and
VLF electromagnetic surveys, all at a 1:2500 scale, over an area of approximately 1 square kilometre that was
centred on the known strike and dip extensions of the known veins (No. 1 through 4) that have been developed
and mined on the property.
The results of these surveys are available through Assessment Reports and are
reported in some detail in this report. Southern Gold also completed reconnaissance talus fines sampling on the
eastern side of the property.
Later during 1988 Southern Gold reportedly completed an underground drilling program in the order of 1200 meters from the 1200 level to test the No. 2 vein where a 107 meter length was reported to average 18.8 g/t gold, 377 g/t silver and 3% copper over a 1.22 metre vein width (George Cross News Letter 1988). Further exploration work is reported for 1989 and possibly 1990 (George Cross News Letter 1990). The results of this underground drilling are not available and a good portion of it has occurred on the adjoining RDB mineral claim not owned by the Company.
Only that work done on the eastern part of the No. 2 and all of the No. 4 veins would be applicable to the Company.
On the 950, 1002, 1050 and 1200 levels on the eastern part of the No.2 vein high (>3%) copper and locally high
gold values (3-20 grams/tonne) over significant strike lengths of 14 to 50 meters across widths of 0.33 to 1.10
metres are defined.
The eastern part of the No.2 vein is worthy of future exploration. Extensive surface exploration, completed by Southern Gold in 1987 suggest additional targets occur on the relatively unexplored #1, #2A, and #3 Veins as well as dip and strike extensions of the #2 vein. The No. 4 vein is open to the east and west of the Rocher Deboule mine as defined by geophysics and mapping.
Also, numerous geophysical and Geochemical targets defined by Southern gold remain to be evaluated for vein mineralization.