Details


SMDI #
0425a
Current Showing Name
Komis Mine
Historical Showing Names
Komis Au Deposit (A to E Zones), Komis Gold Mine, Komis Mine
Company Name
Golden Band Resources Inc.
Project Name
Greater Waddy Lake
UTM Easting (NAD83 Z13)
568233.5000
UTM Northing (NAD83 Z13)
6229811.6300
NTS Sheet
064D04
TRM (Township-Range-Meridian)
83-12-2
Primary Commodities
Gold
Associated Commodities
Cobalt, Copper, Iron, Lead, Molybdenum, Silver, Tungsten, Zinc
Discovery Type
Status
Deposit: Post-Production
Geological Details
The Komis Deposit is located approximately 5.5 km (3.4 miles) west of the narrows of Waddy Lake and 145 km (90.1 miles) northeast of La Ronge. The Waddy Lake area lies within the La Ronge metavolcanic belt and is dominated by a central zone of northwest-trending metavolcanics and metavolcaniclastics flanked by distal, basinal greywacke and intruded by granitic to gabbroic plutons. The volcanic unit is characterized by a thick sequence of tholeiitic to calc-alkaline volcanics ranging from magnesium-rich ultramafic flows at the base through basaltic and andesitic flows and pyroclastics to dacitic and rhyolitic rocks. Sediments are intimately associated with the volcanics. Sulphide facies iron formations are commonly found near the top of the felsic volcanics and sediments. A number of stocks, sills and dykes have intruded the volcanic pile. In the Waddy Lake area gold typically occurs in quartz veins which often show a close spatial association with intrusive bodies. The quartz veins may be related to marginal thrusting associated with pluton emplacement. Gold occurs as isolated blebs in the quartz veins and also associated with numerous sulphides and native copper. Harper (1984) has mapped the Komis Deposit as lying on the contact of a dacite and intermediate andesitic flow. He describes the dacite unit as grading from a flow to a flow breccia, and locally feldspar porphyritic. The andesite in the area shows minor local flow textures. More detailed mapping by Waddy Lake Resources indicated the deposit to have formed by steeply dipping ore zones resulting from hydrothermal fluids emanating from the nearby Round Lake granodiorite pluton along brittle fracture openings that were caused by pluton-related stress. These percolating fluids are now evidenced by 10 to 40 m (32.8 to 131.2 ft) wide swarms of quartz veins that are individually from 1 mm to 50 cm (0.003 to 19.7 in) thick. Where gold-bearing mineralized fluids from the pluton's final stage passed through the andesitic wall rocks, the reaction of the fluid with local disseminated magnetite caused the clumping of sulphides and gold, leaving an auriferous pyritic halo surrounding the vein. The veins that often contain visible gold are associated with a characteristic alteration halo of euhedral pyrite. Overall the Komis deposit consists of a series of pear-shaped bodies (zones A to E) which strike northwest and plunge northwest at 50°. Metallurgical test have indicated that a 92% recovery of gold is possible with gravity scavenging and carbon-leach cyanidation. DRILLHOLE INTERSECTION WIDTH OZ./TON NUMBER (M) (M) AU __________________________________________ KO-90-1 41.0 - 50.0 9.0 0.381 KO-90-2 92.0 - 101.0 9.0 0.104 KO-90-3 15.0 - 17.0 2.0 0.310 62.0 - 72.0 10.0 0.143 KO-90-4 91.0 - 93.0 2.0 0.137 111.0 - 114.0 3.0 0.122 KO-90-5 75.0 - 78.0 3.0 0.143 86.0 - 92.0 6.0 0.125 KO-90-6 47.0 - 49.0 2.0 0.995 59.0 - 71.0 12.0 0.575 KO-90-7 101.0 - 107.0 6.0 0.146 112.0 - 116.0 4.0 0.157 KO-90-11 49.0 - 53.0 4.0 0.174 90.0 - 94.0 4.0 0.210 KO-90-12 35.0 - 38.0 3.0 0.207 68.0 - 71.0 3.0 0.173 75.0 - 81.0 6.0 0.207 94.0 - 98.0 4.0 1.120 KO-90-13 28.0 - 31.0 3.0 0.159 64.0 - 67.0 3.0 0.160 99.0 - 104.0 5.0 0.098 KO-90-14 49.0 - 52.0 3.0 0.252 72.0 - 76.0 4.0 0.313 121.0 - 124.0 3.0 0.387 129.0 - 131.0 3.0 0.132 The 1990 drill program delineated five separate, sub partallel zones of gold mineralization within the deposit which were designated as Zones A to E. The A Zone, which is the most northeasterly zone, occurs at the northeast margin of the host andesite where the unit is pinched out by rhyolite and porphyritic greenstone. The zone which strikes 130°, and dips 60 to 70°NE, has a strike length of 30 m to 40 m (98.4 to 131.2 ft) and a vertical depth of 80 m (262.5 ft). The vein, which is 18 m wide at the surface, has an overall true width of 5.0 m (16.4 ft). Mineralization (3 to 7% pyrite) is restricted to strongly silicified zones of quartz veining and dyking within the andesite adjacent to the contact. The B Zone, which is located immediately southwest of the A Zone, strikes 320° to 330° and dips 45°NE. The zone has a strike length of 70 m (229.7 ft), a true thickness of 3 m (9.8 ft), and it extends vertically to 70 m (229.7 ft). Gold mineralization is associated with 3 to 5% pyrite which is associated with silicification, quartz veining, and rare granodiorite and felsic dykes within the host andesite. The C Zone, which is the largest zone, strikes 310° to 320° and dips 45°NE. The broad zone of mineralization has been traced over a strike length of 100 m (328.1 ft), a true thickness of 6 to 8 m (19.7 to 26.3 ft), and to a vertical depth of 140 m (459.3 ft). The mineralization is hosted within andesite and is geologically identical to the B Zone. The D Zone, which occurs between the B and C Zones, parallels the C Zone. The zone strikes 310° to 320° and dips 45°NE. The zone has been traced over a strike length of 75 m (246.1 ft), a true thickness of 3 m (9.8 ft), and a vertical depth of 110 m (360.9 ft). The alteration and mineralization is identical to that observed at the C Zone. The mineralization is hosted both within the andesite and within the adjacent rhyolite. The E Zone, which parallels the C Zone, has a strike length 25 m (82.0 ft), a true thickness of 3 m (9.8 ft), and a vertical depth of 140 m (459.3 ft). The mineralization, which is andesite hosted, is identical to the C Zone. The alteration feature present at the Komis Deposit, occurs along a series of sub-parallel, 3 to 23 m (9.8 to 75.5 ft) wide, zones of brittle fracturing which cut andesite. The deposit area rocks are strongly silicified, dolomotized, weakly sericitized, and biotite- and muscovite-enriched. Three to seven per cent pyrite (after magnetite) occurs as fine to coarse euhedral crystals, fine disseminations, and locally as microveins and irregular blebs. Minor chalcopyrite occurs with the pyrite. The gold present occurs as fine disseminations and as coarse flakes of free gold. The finely disseminated free gold is associated with areas of higher silicification which forms halos around the quartz veining, and around the granodiorite and felsic dyking within the andesite. The coarse free gold is restricted to the altered margins and centres of small quartz veins which infill areas of brittle fracturing. The gold at this deposit is hydrothermal in origin and is felt to occur early (pre-metamorphism) geologically. The gold mineralization is likely related to the final stages of emplacement of the Round Lake Pluton.
Geological Domain
La Ronge
Host Rocks
Host Minerals
Molybdenite, Pyrite
Indicators
Exploration History
12/1/2023 Operation was suspended in 2014; values are approximate; includes production from the Roy Lloyd, EP and Komis mines. (From Saskatchewan Exploration and Development Highlights 2023, Tables 3 & 4, p.11-12) 12/1/2024 (See Reserves/Resources, from Saskatchewan Exploration and Development Highlights 2024, Tables 6-7, p.12-13) 7/24/1989 The Komis deposit was first prospected by E.F. Partridge. In 1958, he staked 28 claims of which he carried out a geological survey and diamond drilled 5 holes (AF 64D04-0010). In 1959, Falconbridge Nickel Mines Limited optioned the property. The property was increased to 71 claims. In October 1960, Waddy Lake Mines Ltd., a private company, was formed under the sponsorship of Falconbridge to finance exploration and development of the property. Work by Ventures Ltd., an exploration company, from 1960-63 included a magnetometer survey (AF 64D-04-0011), geological mapping, prospecting, soil testing, trenching, exposure of the Komis discovery by hydraulic sluicing and bulldozer, channel sampling and a total of 4215 m (13,829 ft) of diamond drilling (AF 64D04-0012). This exploration resulted in several additional gold occurrences being found. The property was maintained during 1964 to 1973. By 1969, ML 5080 covered the area including the Komis and EP zones. In 1973, E.F. Partridge acquired control of Waddy Lake Mines from Falconbridge and did prospecting and soil sampling on the claim block (AF 64D04-0071). On 1 June, 1973, Partridge staked CBS 1971 around ML 5080 and Waddy Lake Mines Developed Area No. 1. In 1974, Chancellor Energy Resources Inc. optioned the property. Between 1974 and 1975, exploration work completed included soil sampling, an IP survey and 1672 m (5486 ft) of diamond drilling in 16 holes (AF 64D04-0068). The results of the drilling were reported in the Vancouver Stock Exchange. In February 1979, Waddy Lake Mines Ltd. was reorganized and the company name was changed to Waddy Lake Resources Inc. In 1980, the company re-acquired a 100% interest in the property and entered into a joint venture agreement with Energy Reserves Canada and a one thousand ton bulk sample was taken from the Komis Zone to determine the grade of the ore. Tracing the source of the extensive gold-bearing material occurring in overburden elsewhere on the property was initiated by prospecting and soil sampling (AF 64D04-0072). The sampling returned an average uncut grade of 0.124 oz./ton Au. In 1981, 27 new diamond drill holes were completed. Geological mapping and geochemical till sampling programs were also undertaken. Detailed magnetic surveys were also begun to locate gold mineralization associated with magnetite. Waddy Lake re-assumed control of the property and reported 37 diamond drill holes totalling 6883 ft (2098 m) in 1983. Soon after, they reported recovery rates from heap-leaching (53%) as well as grinding (70-80%). 4190 m (13,747 ft) of drilling in 23 holes was planned, in February 1983, to test the Komis Zone along strike and down dip and delineate the open pit potential amd test the continuity of the zone at depth. One hole indicated that mineralization continued to below the 650 ft (198 m) level and several cores exhibited visible in granodiorite-related zones. Mineralized zones greater than 300 ft (91.4 m) wide were located. Waddy Lake Resources Inc. carried out till sampling over the area in 1983 (AF 64D04-0110). A third phase of exploration began in October consisting of detailed testing of overburden tills in order to obtain a definitive till grade and to locate the source of the till. The EP zone was located as a result. At this point, Waddy Lake Mines released deposit reserves figures. Pre-production studies began in 1984, and Waddy Lake entered into a joint venture agreement with Placer Dome who did development drilling on the deposit. Geophysical and geochemical surveys were continued (64D04-0111,0112). At the end of the program, reserves were released, In 1986, Waddy-Placer Dome completed 136 overburden holes, backhoe trenching and soil sampling to check overburden anomalies 1 to 5 and 14 encountered in 1984 (AF 64D04-0121). Revised reserves figures were released. In 1988, the partnership completed 28 drill holes (88-19 to 46) to the north of the deposit to test the Dog Creek Stock and Gold-Smith Vein areas (AF 64D04-0104). In 1990, Waddy Lake Resources checked all previously submitted drill data and completed a 29 hole drill program on the deposit. The better intersections encountered are reported above. This work further delineated the five distinct, shear-hosted auriferous zones of pyrite-gold mineralization that constitute this deposit. At this time, the "probable drill-indicated" reserves of the deposit were published in the 11 February 1991 Stockatch magazine. In November of 1992, the Komis deposit revised reserves figures were released. These figures include ore from the A and C sub-zones. On 6 April 1993, Waddy Lake Resources completed a feasibility study on the deposit and gave a global reserves calculation (all mineralized zones present). At this time, all zones are open along strike and down plunge. On 29 October 1993, environmental approval was granted to commence an access decline ramp with cross-cuts at the 350 and 400 m levels to extract a 10,000 tonne bulk sample from the A and C Zones. On 14 January 1994, Waddy Lake Resources and Golden Rule Resources entered into an agreement whereby Golden Rule Resources would advance $4 million of $5 million capital cost. This money would be used to complete underground exploration and development, test mining of the above-mentioned bulk sample, and to rehabilitate the Jolu Mill. On November 18, 1993, the mine portal was collared. Between 1993 and 15 April 1994, a 480 m decline, raises and cross-cuts on the 350 m and 400 m levels were completed and a 10,940 ton bulk sample was mined from the A and C Zones. After the mining was completed, Waddy Lake Resources completed a 2,700 m underground drill program. At this time, the Komis deposit development revised ore reserves figures were made public. Processing of the bulk sample at the Jolu Mine mill between May 3 and 30 May 1994, gave a 291.3 kg table gold concentrate and a 35 ton gold-pyrite concentrate. The latter concentrate was shipped to Asarco's Helena Montana plant for further sampling and smelting. On 13 September 1994, Golden Rule Resources announced that the bulk sample testing had led to the conclusion that the deposit was mineable. New global deposit reserves figures were released at this time. The deposit tonnage and grade were found to increase with depth. It is proposed that the deposit be mined using blast hole and shrinkage stope methods. It was suggested that the ore be processed through a 440 ton per day mill. Between 1992 and 1994, 56 surface drill holes, 60 underground drill holes, stripping and sampling of the deposit, and a description of the underground development and mill facilities was completed (AF 64D04-0181). In October of 1994, 36 surface holes were completed to test the deposit extension to the west and down plunge. On 29 March 1995, new revised deposits reserves were announced. A Wady Lake Resources Inc. and Golden Rule Resources Ltd. press release, dated 31 August 1995, listed further revised proven-probable (mineable) ore reserves figures. At this time, the deposit is open to the west along strike and down plunge. On 7 February 1996, Golden Rule announced that they had received approval from Saskatchewan Environment and Resource Management to proceed with construction of the mine and associated facilities. Construction of the Komis Mine facilities commenced in February of 1996. Continous development of six shrinkage stopes should eventually feed 440 tons per day to the mill. On 31 August 1996, the mill startup commenced. Low grade Komis ore was fed through the Jolu mill at a rate of 378 tons per day. The first gold pour of 1,256 troy ounces Au occurred on 7 October 1996. On 28 January 1997, Waddy Lake Resources Inc. announced that development On 28 January 1997, Waddy Lake Resources announced that development work would be curtailed pending an assessment of the project. The drop in the price of gold, the shortfall of gold production due to excessive dilution, and the complexity of the ore zone configuration were the reasons stated for ceasing further underground development. A production review, a new reserves calculation, and an assessment of the cost of development of the remaining reserves was completed. In February of 1997, Waddy Lakes Resources Inc. applied for a temporary mine closure permit. The mine closed and, to date, a new owner has not been found. The ore stockpiled at the Jolu Mill was processed in 1997.
Production History
Production Period: 2011-01-01 to 2014-12-31 Golden Band Resources Inc. : 323,491.00 tonnes Renewed mining again as part of Golden Band Resources La Ronge gold project from 2011 to 2014. Summary: - Gold: 77,118.00 troy ounces @ 8.55 g/tonne Production Period: 1997-01-01 to 1997-02-07 83,211.00 tonnes Construction of mine facilities commenced in February of 1996. The mill commenced operations on 31 August 1996. The first gold bar (1,256 troy ounces gold) was poured on 7 October 1996. On 7 February 1997, production ceased and the mine closed. The stockpiled ore was processed at the Jolu Mill in 1997. Summary: - Gold: 17,205.00 oz @ 0.22 oz/ton Production Period: 1996-08-31 to 1997-02-07 132,900.00 tonnes KOMIS GOLD MINE PRODUCTION FIGURES YEAR TONNES ORE TONS ORE TONS ORE MILL FEED RECOVERY OUNCES AU MINED MILLED MILLED/DAY GRADE RATE PRODUCED __________________________________________________________________________ 1995 NIL NIL NIL -------- NIL 0,000.00 1996 87,218 49,689 501 0.22 o/t 90.0% 9,680.00 1997 41,942 83,211 N/A 0.22 o/t N/A 17,205.00 __________________________________________________________________________ TOTAL 129,160 132,900 400 0.22 o/t 88.8% 26,885.00 NOTE: these figures supplied by Bob Lemmen of Golden Rule Resources on 28 July 1998. The differences between ore mined and ore milled is due to the milling of ore taken from original sampling prior to mining. Summary: - Gold: 26,885.00 oz @ 0.22 oz/ton Production Period: 1996-08-31 to 1996-12-31 49,689.00 tonnes Summary: - Gold: 9,680.00 oz @ 0.22 oz/ton
Reserves and/or Resources
2024-12-01 Summary: Komis: Inferred Mineral Resource of 10,746.00 tonne - Gold: 2,731.00 troy oz @ 7.91 g/tonne (Cutoff: 4) Komis: Measured and Indicated Mineral Resource of 191,740.00 tonne - Gold: 48,398.00 troy oz @ 7.85 g/tonne (Cutoff: 4) 2023-12-01 Summary: Komis: Measured and Indicated Mineral Resource of 191,740.00 tonne - Gold: 48,398.00 troy oz @ 7.85 g/tonne (Cutoff: 4) Komis: Inferred Mineral Resource of 10,746.00 tonne - Gold: 2,731.00 troy oz @ 7.91 g/tonne (Cutoff: 4) 2012-04-30 NI 43-101 Measured & Indicated Resources (April 30, 2012) of 191,740 tonnes grading 7.85 g/t Au; and Inferred Resource of 10,746 tonnes grading 7.91 g/t Au. Summary: Inferred Mineral Resource of 10,746.00 tonne - Gold @ 7.91 g/ton Measured and Indicated Mineral Resource of 191,740.00 tonne - Gold @ 7.85 g/ton 2010-01-22 Summary: Komis: Inferred Mineral Resource of 10,746.00 tonne - Gold: 2,731.00 oz @ 7.91 g/tonne (Cutoff: 4) Komis: Indicated Mineral Resource of 191,740.00 tonne - Gold: 48,398.00 oz @ 7.85 g/tonne (Cutoff: 4) 2005-01-01 A resource of 990,000 tonnes grading 0.11 oz/ton (3.81 g/t) Au. Summary: Historic resource (unspecified) of 990,000.00 tonne - Gold @ 0.11 oz/ton 2003-12-31 687,300 t grading 0.30 oz/ton Au. Summary: Historic resource (unspecified) of 687,300.00 ton - Gold @ 0.3 oz/ton 1995-08-31 Waddy Lake Resources Inc. – Golden Rule Resources Proven-probable (mineable) reserves: 757,650 tons grading 0.30 oz/ton Au (cut and diluted) and an additional possible reserve of 632,000 tons grading 0.39 oz/ton Au. Summary: Historic possible reserve of 632,000.00 ton - Gold @ 0.39 oz/ton Historic proven and probable reserve of 757,650.00 ton - Gold @ 0.3 oz/ton 1995-03-29 1,256,000 tons of ore grading 0.42 oz/ton Au. Proven reserves: grade: 0.554 oz/ton Au. Probable reserves: 276,000 tons grading 0.277 oz/ton Au. Possible reserves: 615,000 tons grading 0.40 oz/ton Au. Summary: Historic probable reserve of 276,000.00 ton - Gold @ 0.277 oz/ton Historic possible reserve of 615,000.00 ton - Gold @ 0.4 oz/ton Historic proven reserve of 1,256,000.00 ton - Gold @ 0.554 oz/ton 1994-09-13 Global reserves: 447,000 tons grading 0.362 oz/ton Au. Mineable reserve (A, C, E Zones, dilution factor of 17.5%): 246,000 tons grading 0.363 oz/ton Au. Summary: Mineable Reserve (A, C, E Zones): Historic reserve (unspecified) of 246,000.00 ton - Gold @ 0.363 oz/ton Global Reserve: Historic reserve (unspecified) of 447,000.00 ton - Gold: 447,000.00 ton @ 0.362 oz/ton 1994-04-15 314,000 tonnes grading 0.47 oz/ton Au. Summary: Historic reserve (unspecified) of 314,000.00 tonne - Gold @ 0.47 oz/ton 1993-04-06 A global reserves calculation (all zones present): 383,836 tons with an average un-cut, grade undiluted grade of 0.411 oz/ton Au. Calculated using a cut-off of cubed method. 0.10 oz/ton Au and a specific gravity of 2.98 short tons per cubic meter. All zones open along strike and down plunge. (Calculated using inverse dist. cubed method) Summary: Global Reserve: Historic reserve (unspecified) of 383,836.00 ton - Gold @ 0.411 oz/ton (Cutoff: 0.1) 1992-11-01 510,000 tonnes grading 0.44 oz/ton Au. This includes 85,500 tonnes grading 0.41 oz/ton Au from the A Zone and 280,000 t grading 0.48 oz/ton from the C Zone. Summary: Includes A Zone and C Zone: Historic reserve (unspecified) of 510,000.00 tonne - Gold @ 0.44 oz/ton 1991-04-04 Reserves: 562,000 tons grading 0.043 oz/ton Au. Summary: Historic reserve (unspecified) of 1,610,000.00 ton - Gold @ 0.15 oz/ton 1991-02-11 Drilled reserves: 1,610,000 tons grading 0.15 oz/ton Au. Summary: Historic reserve (unspecified) of 562,000.00 ton - Gold @ 0.043 oz/ton 1986-01-01 Waddy Lake Resources Inc. – Placer Dome Inc. 1,608,920 tons grading 0.122 oz/ton Au to a depth of 600 ft (182.9 m). Summary: Historic resource (unspecified) of 1,608,920.00 ton - Gold @ 0.122 oz/ton 1984-01-01 Waddy Lake Resources Inc. – Placer Dome Inc. 1,608,920 tons grading 0.122 oz/ton Au to a depth of 600 ft (182.9 m). Summary: Historic resource (unspecified) of 1,608,920.00 ton - Gold @ 0.122 oz/ton 1983-01-01 1.6 million tons grading 0.122 oz/ton Au to a depth of 600 ft. An estimated 92% recovery rate using gravity scavaging and carbon leach cyanidation. Summary: Historic resource (unspecified) of 1,600,000.00 ton - Gold @ 0.122 oz/ton
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