The Johnny Mountain and Snip mines are both formerly producing high grade mines, Johnny Mountain it is located on the company's Iskut property. These 2 mines are located in the Bronson Slope area; both properties still offer exploration potential.
Re-sampling and reinterpretation of old exploration drill core from the High 1 claim led to the conclusion by Skyline geologists that the Snip shear veins extended along strike across the common property boundary onto the High 1 claim. In particular, a 2.0 metre intercept containing 15.8 g/t gold was interpreted as a worthwhile exploration target.
The program was performed from February 20 to May 12, 1999. A total of 197.7 metres of exploration drift advance and 1495.0 metres of diamond drilling in 17 holes were completed. The 412 No. 1 & 2 Veins were tested on five sections spaced 25 metres apart, at 25 metre elevation intervals. The highest grade intercepts were on the 412 No. 2 Vein in holes SU 4 (8.6 g/t gold across 1.5 m) and SU 5 (9.0 g/t gold across 0.5 m). Hole SU5 was drilled close to the projected location of the target intercept. Additional anomalous grade intercepts of the 412 No. 2 Vein were in hole SU 9 (1.25 g/t across 0.3 m) and SU 14 (2.5 g/t across 0.2 m). The remainder of the 412 No. 2 Vein and all of the 412 No. 1 Vein intercepts contained less than 1.0 g/t gold. Of 32 samples taken from exposures of the two veins in the exploration drift, two contained greater than 1.0 gram gold per tonne: a 0.25 m sample of the 412 No. 1 Vein containing 3.20 g/t gold and a 0.55 m sample of altered wallrock adjacent to the 412 No. 1 Vein containing 8.95 g/t gold.
At the moment there are no plans to explore the deeper portion of the Snip extension but the High Wall gold zone is a priority exploration target.
The area is underlain by stratified rocks that range from Paleozoic metasediments to Upper Triassic sediments, and Lower Jurassic volcanic rocks that are cut by Upper Triassic diorites, Lower Jurassic potassic feldspar porphyries and Jurassic felsite intrusions. The Upper Triassic sedimentary sequence consists of a lower package of deformed tuffaceous clastic rocks with local limestone and tuff layers, and an overlying sequence of undeformed fine to coarse clastic sediments. The undeformed sequence includes the Snip mine series. The Lower Jurassic volcanic sequence has a lower unit of tuffaceous wackes and conglomerates; a Lower Andesite package of lapilli, crystal and ash tuffs; a Middle Dacite package of tuff breccias, welded tuffs, plagioclase porphyry, lapilli tuff and ash tuff; and an Upper Andesite and Basalt package of lapilli, crystal and ash tuffs.
Upper Triassic diorites and Lower Jurassic, locally megacrystic K-feldspar porphyry and Jurassic felsite intrusions form stocks and dikes. Underground at Snip gold mine, a biotite porphyritic mafic dike occurs at the Twin zone, which is cut off by lamprophyre dikes. The Hoodoo olivine plagioclase basalt dikes are seen underground at Johnny Mountain gold mine. Commodities in the 29 mineral occurrences listed are copper-gold-silver, gold-silver-copper-lead-zinc, silver-lead-zinc-gold, gold-silver, lead-zinc, gold only and molybdenum.
The Johnny Mountain mine (Stonehouse deposit, 3 tonnes Au production) located south of Snip, consists of a set of steep north-dipping dilatant quartz-pyrite veins with K-feldspar alteration envelopes. The veins are superimposed on flat lying Early Jurassic volcaniclastic rocks that are intruded by a series of Early Jurassic feldspar porphyry dykes. Structural relations suggest that the Stonehouse veins represent a higher level, more brittle response to the same deformational event that formed the stratigraphically deeper Snip orebodies.
The Early Jurassic Red Bluff K-feldspar megacrystic quartz diorite stock intrudes Triassic rocks 300-800 metres northeast of the Twin zone. The intrusion is affected by (i) early intense quartz-magnetite-sericite-K-feldspar-biotite (potassic) alteration associated with abundant quartz-magnetite-hematite veins and Au-Cu-Mo mineralization, overprinted by (ii) sericite-pyrite-quartz (phyllic) alteration characterised by pyrite veining. Geologic relations, including similarities in alteration and structural style, geochronology, and camp-scale mineralogic and alteration zoning, indicate that intrusion, deformation, initiation of the porphyry hydrothermal system, and formation of the structurally hosted Au and base metal deposits are closely related spatially, temporally and probably genetically.
The Johnny Mountain mine was engaged in pre-production from January through to November of 1988. The mill began operation in August and commercial production was achieved on November 1, 1988. The mine closed in mid-August of 1990 and milling operations ceased in early September. High operating costs and low gold prices were significant factors in the closure.
PRODUCTION SUMMARY BY YEAR
FORMER JOHNNY MOUNTAIN HIGH GRADE GOLD MINE
Production Year |
Tonnes Mined |
Tonnes Milled |
Commodity |
Grams Recovered |
Kilograms Recovered |
| 1993 |
21,850 |
21,850 |
Silver Gold |
407,000 217,7000 |
- - |
| 1990 |
74,936 |
86,865 |
Silver Gold Copper |
1,334,263 906,754 |
347,633 |
| 1989 |
85,944 |
94,282 |
Silver Gold Copper |
2,485,451 1,544,083 - |
- - 643,386 |
| 1988 |
13,628 |
24,250 |
Silver Gold Copper |
122,100 146,856 - |
- - 17,090 |
PRODUCTION TOTAL SUMMARY METRIC & IMPERIAL
MILLED AND MINED
|
Metric |
Imperial |
| Mined |
196,358 tonnes |
216,387 tons |
| Milled |
227,247 tonnes |
250,426 tons |
| Recovery |
| Silver |
4,348,814 grams |
139,818 ounces |
| Gold |
2,815,393 grams |
90,517 ounces |
| Copper |
1,008,109 kilograms |
2,222,477 pounds |
*The Qualified Person(s) responsible for the information regarding the Johnny Mountain property given on this website is David Yeager P. Geo.