Rocher Deboule Mine, Omineca Mining Division, British Columbia, Canadai

Regional Level Types
Rocher Deboule Mine	Mine
Omineca Mining Division	Mining Division
British Columbia	Province
Canada	Country

The following quote is from B.C. Government site “Minfile”- Minfile No. 093M 071:
“The Rocher Deboule mine is located on the northeastern portion of Rocher Deboule Mountain, 11 kilometres south of Hazelton. The Rocher Deboule and Victoria mines (093M 072) were discovered before World War I. From 1915 to 1954, 123,395 tonnes produced 2,653,086 grams of silver, 157,226 grams of gold, 2,840,966 kilograms of copper, 341 kilograms of lead, 34,692 kilograms of tungsten, and 3,274 kilograms of zinc.
The area is underlain by hornfelsic greywackes and siltstones of the Jurassic to Lower Cretaceous Bowser Lake Group which are intruded by the Rocher Deboule porphyritic granodiorite stock of the Late Cretaceous Bulkley Plutonic Suite. Dikes are not abundant but consist of fine-grained quartz monzonite, fine-grained diorite and porphyritic andesite.
There are five main vein structures which are numbered from 1 to 5, the No. 2 vein being the most important. The veins occur over a 750-metre width, within parallel structures which generally strike 075 degrees and dip 35 to 65 degrees north. The veins are 0.5 to 2.4 metres wide and up to 700 metres long. The veins outcrop at elevations 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 veins. The 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 vein 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 sub-levels, 950, 1050, and 1300; the 1300 Level 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.
Three distinct stages of mineralization are apparent. The first stage is pegmatitic and includes hornblende, quartz, feldspar, apatite, magnetite, scheelite, molybdenite and uraninite. The second and main stages include chalcopyrite, glassy quartz, arsenopyrite, cobaltite, safflorite, glaucodot and pyrrhotite. The third stage includes milky quartz, siderite, calcite, tetrahedrite, sphalerite, galena, pyrite and possibly chalcocite. Secondary minerals include malachite, erythrite and limonite.”

Further comments by Giles Peatfield regarding minerals reported:
There are numerous reports of various Co-Ni-Fe-As species, but very little detailed information. The only firm data are in Plumb (1950), who reported that cobaltite and löllingite were found in polished sections and confirmed by R.M. Thompson, by X-ray powder analysis. Further data search is needed. Detailed work on material from this mine would make a worthwhile project, assuming that material could be obtained.
Unfortunately, there is no further information regarding the yellow-fluorescing secondary uranium material reported by Kindle (1954) and Little (1959).

References

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Link to British Columbia Minfile:	093M++071

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