Details


SMDI #
2234
Current Showing Name
Porky West Gold Zone
Historical Showing Names
Porky Main Gold Zone, Porky West Gold Zone
Company Name
SSR Mining Inc.
Project Name
Seabee Gold Operation
UTM Easting (NAD83 Z13)
585075.9100
UTM Northing (NAD83 Z13)
6175098.3300
NTS Sheet
063M12
TRM (Township-Range-Meridian)
77-11-2
Primary Commodities
Gold
Associated Commodities
Discovery Type
Drillhole
Status
Deposit: Development
Geological Details
The Porky Lake PL-1 Showing, later re-named the GAS (Gold-Arsdenopyrite-Sulphide) or West Au Zone, is located slightly northwest of the middle of three small lakes located immediately west iod the west shore of the south central portion of Porky Lake. The showing is approximately 2.40 miles (3.86 km) northwest of the Seabee Deposit No. 5 vein (SMDI. 0382). The showing initially consisted of the mineralization encountered in drill holes CR-5 and CR-6. The West Porky Lake Main Zone, which is the southeast extension of the GAS Zone or Porky Lake West Zone mineralization, is located along a peninsula that juts out from the west shore of Porky Lake at the saouth end of the lake. The Porky Main Zone is located approximately 0.4 km (0.6 mile) west of the East Porky Au Zone or SMDI 2232 and 800 m (0.5 mile) southeast of the PL-1 Showing (later re-named the GAS Zone or the West Porky Au zone). Both zones are hosted by the same narrow, northwest-trending band of mafic volcanic/metasedimentary rocks. The Main Zone extends to the southeast under Porky Lake. The showing area is underlain by the Pine Lake Group or an northwest-trending succession of mafic metavolcanics and associated volcanic fragmentals, volcaniclastics, metasediments, calcsilicate horizons, conglomerates, and pelitic sediments. A thin, foliation parallel felsic dyke-like body has intruded along the volcanic/siliciclastic contact. This subvolcanic dyke ballons in size to the southeast near the closure of the Porky Lake Antiform and it appears to have acted as an impermeable barrier that trapped gold-bearing hydrothermal fluids This suite of metavolcanics and associated metasediments has been observed to contain "thin screens" of high magnesian komatiitic basalt within the more pervasive tholeiitic basalts that, locally, exhibit spinifex textures. The stratigraphy of the Pine Lake Group, when viewed from oldest to youngest, includes the oldest rocks or the Pine Lake mafic volcanic suite, the contemporaneous 1890 Ma mafic Laonil Lake Intrusive Complex, an unconformably overlying heterolithic conglomerate, the younger 1859 Ma tonalitic Eyahpaise Pluton rocks, and, finally, the Porky Lake siliclastics - the youngest rocks in the succession. The Pine Lake Group succession which straddles the west limb of the Porky Lake antiform - a southern extension of the Ray Lake Synform. From north to south, the plunge of the Ray Lake Synform rotates from a shallow northeast plunge through a vertical plunge to a steeply southeast plunge in the Porky Lake area. This rotation results in the Porky Lake portion of the structure being antiformal. The mineralization is hosted along a south southeast-trending shear zone that dips 75°SW. The mineralized intersections in both initial drill holes completed on the PL-1 Showing or the West Porky Zone are hosted by fine-grained, grey to green metavolcanic flow top material with local interbands rich in purple-grey carbonate amygdules. The actual sulphide zone could best be described as a chaotic flow breccia. Drill hole CR-5 encountered a 10.0 m (32.8 ft) thick unit of near solid sulphide hosted by brecciated flowtop volcanics from 39.0 m to 49.0 m (128.0 to 160.8 ft). The near solid sulphide unit averaged 30 to 40% pyrrhotite and associated minor pyrite and rare chalcopyrite. The sulphide mineralization occurs as swirls, irregular blebs and fracture fillings. Drill hole CR-6 encountered a 3.5 m (11.5 ft) thick unit of near solid sulphide hosted by brecciated flowtop volcanics from 57.9 m to 61.4 m (190.0 to 201.5 ft). The near solid sulphide unit contains up to 98% pyrrhotite and minor associated pyrite and chalcopyrite. A second intersection (31.8 and 32.1 m) in this drill hole consists of a fine grained, dark grey, chloritic metavolcanic which hosts up to 1% disseminated coarse arsenopyrite and associated minor pyrite and rare chalcopyrite. This second interval returned 0.115 oz./ton Au. CORE SAMPLE ASSAYS SLUDGE SAMPLE ASSAYS DRILLHOLE INTERSECTION WIDTH PPB PPM PPM PPM PPB PPM PPM PPM NUMBER (M) (M) AU AG CU NI AU AG CU NI _____________________________________________________________________________ CR-5 39.0 - 40.0 1.0 10 --- 170 170 8 --- 150 160 44.0 - 45.0 1.0 5 --- 180 160 11 --- 200 220 49.0 - 49.6 0.6 4 --- 110 110 17 --- 210 210 73.3 - 73.5 0.2 270 --- --- --- 77 --- --- --- CR-6 31.8 - 32.1 0.3 2370 0.4 --- --- 365 0.0 --- --- 58.2 - 59.2 1.0 76 --- 520 450 80 --- 210 460 59.2 - 59.6 0.4 6 --- 220 170 80 --- 210 460 96.3 - 97.0 0.7 132 --- --- --- 81 --- --- --- WEST PORKY LAKE AU ZONE _______________________ The West Porky Zone or the GAS Zone was discovered in 2003 by drilling at the site of the existing Porky Lake PL-1 Au Showing. The south portion of the immediate area around the zone is underlain by Pine Lake Group greywackes which, to the north, contact with Pine Lake Group mafic volcanics. To the north, the mafic volcanics contact with arenite. At the zone, the volvanic-arenite contact has been separated by a thin, northwest-trending zone of calc-silicate rock. The zone lies on the west limb of the Porky Lake Anticline. The northwest-trending zone, which has been classified as an example of the sulphide replacement gold-bearing second order shear model, is located 200 m (656.2 ft) west of the surface expression of the mineralization. The better gold values occur as free gold within a silicified feldspathic arenite and within a series of quartz veins that cut the arenite. The gold in the calc-silicates is felt to be hydrothermally introduced gold-arsenopyrite seems to follow the volcano-sedimentary contact within a a sulphide replacement shear corridor. To date, the mineralized shoot has a strike length of approximately 100 m(328.1 ft) and an average width of 2 m (6.6 ft). The shoot appears to plunge to the southeast. Better drill intersections encountered are as follows: DRILLHOLE INTERSECTION WIDTH G/T INTERSECTION NUMBER (M) (M) AU GEOLOGY ______________________________________________________________ GA03-01 89.60 - 91.85 2.25 5.57 mafic volcanics GA03-04 210.00 - 211.80 1.80 1.80 arenite GA03-06 119.20 - 121.60 2,40 11.81 arenite 157.10 - 162.20 5.10 6.12 quartz vein in arenite (incl) 157.10 - 158.75 1.65 14.66 hanging wall of qtz vein GA03-10 202.75 - 210.03 7.28 2.73 quartz vein in arenite (incl) 203.75 - 206.00 2.25 5.88 WEST PORKY LAKE MAIN ZONE _________________________ The West Porky Lake Main Zone is geologically identical to the Porky Lake West zone and along strike to the southeast along the same mineralized horizon that hosts the Porky Lake West Zone. Ths zone consists of a series of sub-parallel mineralized structures within altered mafic metavolcanic calc-silicates (which Claude interprets as representing a sulphidized second or third rder shear) and feldspathic arenites. Intersections encountyered, sugest that the system thickens and is higher grade to the east. The gold in the calc-silicates is associated with pyrite, pyrrhotite and, to a lesser extent, arsenopyrite. DRILLHOLE INTERSECTION WIDTH G/T INTERSECTION NUMBER (M) (M) AU GEOLOGY ______________________________________________________________ PKY02-01 69.25 - 72.30 3.05 54.33 fault in calc-silicate 122.70 - 125.70 3.00 14.12 silicified arenite PKY02-02 35.00 - 36.70 1.70 2.69 calc-silicate PKY02-03 50.95 - 52.30 1.35 8.90 silicified arenite 62.20 - 64.40 2.20 8.46 silicified arenite PKY02-04 37.90 - 39.80 1.90 4.62 calc-silicate 73.55 - 77.40 3.85 15.79 silicified arenite PKY02-05 15.30 - 16.40 1.10 2.43 calc-silicate 18.30 - 19.50 1.20 2.87 calc-silicate PKY02-06 12.00 - 13.00 1.00 3.74 calc-silicate 67.20 - 70.70 3.50 6.04 silicified arenite PKY02-07 128.80 - 130.20 1.40 10.70 calc-silicate PKY02-08 107.10 - 111.40 4.30 3.06 silicified arenite PKY02-09 64.95 - 66.80 1.85 6.90 calc-silicate 117.10 - 118.70 1.60 2.37 silicified arenite PKY02-11 37.00 - 37.50 0.50 54.96 calc-silicate 101.30 - 104.90 3.60 12.44 calc-silicate PKY02-14 179.60 - 182.00 2.40 7.44 calc-silicate 188.90 - 191.75 2.85 4.34 calc-silicate PKY02-16 202.15 - 204.10 1.95 9.98 calc-silicate 227.70 - 229.45 1.75 3.51 silicified arenite PKY02-18 338.70 - 340.70 2.00 4.00 silicified arenite PKY03-20 145.60 - 164.60 19.00 3.00 calc-silicate PKY03-21 217.05 - 217.30 0.45 17.23 arenite PKY03-22 196.20 - 197.20 1.00 5.06 calc-silicate 218.30 - 219.75 1.45 4.60 calc-silicate 227.30 - 229.35 2.05 4.69 mafic volcanics 248.30 - 250.40 2.10 5.90 calc-silicate 270.25 - 279.30 7.95 7.15 arenite + felsite 290.20 - 292.50 2.30 9.24 arenite PKY03-23 159.25 - 160.10 0.85 7.26 calc-silicate 208.55 - 209.40 0.85 5.82 calc-silicate PKY03-24 92.65 - 95.45 2.80 11.77 mafic metavolcanics 105.90 - 107.60 1.70 3.68 calc-silicate 116.80 - 118.30 1.50 6.17 calc-silicate 121.45 - 122.95 1.50 3.66 calc-silicate PKY03-25 179.10 - 180.45 1.05 8.86 arenite PKY03-27 115.10 - 120.00 4.90 7.68 qtz vein in calc-silicate 164.00 - 165.65 1.65 3.79 qtz vein in mafic volcanics PKY03-28 19.80 - 21.50 1.70 4.08 mafic volcanic 93.95 - 94.56 0.61 8.50 arenite PKY03-29 243.30 - 245.65 2.35 3.56 arenite 260.15 - 264.45 4.30 3.62 arenite PKY03-30 77.30 - 79.50 2.20 11.08 mafic volcanics 144.20 - 161.30 17.10 3.62 arenite PKY03-31 151.00 - 153.50 2.50 8.57 arenite PKY03-34 108.05 - 109.60 1.55 3.83 calc-silicate 158.95 - 160.90 1.95 3.01 arenite PKY03-36 53.35 - 57.30 3.95 2.06 calc-silicate 90.53 - 91.98 1.45 3.99 calc-silicate PKY03-40 109.50 - 111.25 1.75 2.24 mafic volcanics PG04-25 74.10 - 75.10 1.00 10.83 5-8% As, 1-2% py-po: qtz vein 97.85 - 98.40 0.55 104.90 trace sulphide - quartz vein PG04-27 191.20 - 192.10 0.90 10.03 5% As: silicified area PG04-28 109.10 - 110.00 0.90 13.15 traces sulphide: chl-qtz vein 137.30 - 137.80 0.50 4.43 trace As: chl in quartz vein PG04-36 60.80 - 61.60 0.80 61.77 2-3% As: quartz vein PG04-39 11.60 - 12.20 0.60 11.90 2-3% As: silicified area
Geological Domain
Glennie
Host Rocks
Host Minerals
Indicators
Exploration History
12/1/2023 SSR Mining Inc.’s Seabee gold operation, which includes the Santoy underground mine and the Seabee mill facility, remains the province’s lone gold producer. After achieving five consecutive years of record production at its Seabee mining operation, SSR was hampered by COVID-19–related setbacks in 2020 and produced 81,686 oz of gold. Production in 2021 rebounded to another new record of 118,888 oz of gold. In 2022, SSR reported year-end production totaling 136,125 oz of gold, representing yet another year of record production from the operation. The company has enough resources to keep the operation in production until at least 2032, with more being discovered each year. (Saskatchewan Exploration and Development Highlights 2023, p.4) The SSR Mining Inc.–owned Seabee gold operation has been in continuous commercial production since 2014 and continues as Saskatchewan’s sole gold producer. The Seabee operation comprises production at the active Santoy underground mine and ore processing at the Seabee mill facility. The 2022 year-end production for the operation totaled 136,125 oz of gold, a record high in its 30 years of operation. Through the first two quarters of 2023, the Seabee operation produced 32,196 oz of gold, compared with 90,923 oz in the first two quarters of 2022. The 2023 lower gold production at Seabee is due to lower grades milled and unplanned maintenance downtime. (Saskatchewan Exploration and Development Highlights 2023, p.10) In the La Ronge gold belt area, the Seabee operation focused on exploring a new reserve located at the Gap Hanging Wall, which extends from the Santoy mine, and continued drilling at the Joker target, which aims to extend mineralization to the Santoy mine. (Saskatchewan Exploration and Development Highlights 2023, p.11) (See also Production and Reserves/Resources, from Saskatchewan Exploration and Development Highlights 2023, Tables 3 & 4, p.11-12. Note: All production values are approximate; includes production from the Seabee mine, Santoy mining complex, and the Porky West and Santoy 7 bulk samples) 12/1/2024 The Seabee gold operation, owned and operated by SSR Mining Inc., has been in continuous commercial production since 1991 and is the sole gold producer in Saskatchewan. Current production comes from the Santoy underground mine and the ore is processed at the Seabee mill facility. The 2023 year-end production totaled 90 777 troy oz of gold. Through the first two quarters of 2024, Seabee produced 40 482 troy oz of gold, compared with 32 196 troy oz in the first two quarters of 2023. This past August, SSR had to temporarily suspend mining operations due to encroaching forest fires, which impacted Seabee's production in the third quarter; mining operations resumed in the second half of October 2024. SSR continues to explore around the Seabee gold operation at Santoy mine and the Gap Hanging Wall (GHW) aiming to extend the mine life through new reserve growth. A total of 107 233 m of drilling was conducted in 2023, which concentrated on exploration targets and the expansion of mineralized zones. In 2023, underground drilling was focused on the plunge extension of Santoy 8 and 9 veins and in the Santoy 6 area. The Santoy 8 and 9 veins were extended to a vertical depth of $1200 m; gold mineralization in the Santoy 6 area was found to be associated with altered granodiorite dykes. SSR also increased the drillhole density around GHW to improve grade interpolation. At the Porky West deposit, mineralization was defined by surface drilling over a strike of 1400 m and to a vertical depth of 500 m. Additional drilling at the Petunia target identified that this mineralized zone is hosted along the same structure as the Porky West and Porky Main deposits; the estimated total strike length of the structure is thus approximately 2.8 km from northwest (Petunia) to southeast (Porky Main). (Saskatchewan Exploration and Development Highlights 2024, p.11-12) (See also Production and Reserves/Resources, from Saskatchewan Exploration and Development Highlights 2024, Tables 4-7, p.11-13) 5/1/1991 In 1947, prospecting in the general area led to the discovery of the gold showing named the Seabee Deposit (SMDI. 0382). The Seabee showing was staked by B. Corregon. The Seabee showing was acquired by the Consolidated Mining and Smelting Company of Canada Ltd. (Cominco) in 1948. Between 1948 and 1972, Cominco drilled and trenched the various auriferous quartz veins that comprise the Seabee showings (AF 63M12-0002). In 1972, Cominco undertook an exploration program to discover new quartz veins on the property. Several new veins were located and in 1974 several X-ray drill holes were completed to test these veins. The Seabee deposit was drill-evaluated again by Cominco in 1982 to 1983. Claude Resources Inc. acquired a 100% interest in the Seabee property from Cominco on 27 April 1984. By 1981, the immediate showing area was covered by Currie Rose Resources Inc. CBS 7057. In this year, Currie Rose flew an INPUT and magnetic survey that covered the showing area (63M12-0010). A ground follow-up program of prospecting followed in 1984 by the drilling of geophysical anomalies led to the discovery of the showing (AF 63M12-0011). Drill holes CR-5 and CR-6 intersected the mineralization that was later named the Porky Lake 1 Showing (later re-named the GAS Zone or West Porky Au Zone). In 1985, Currie Rose completed ground EM and magnetic surveys over the Porky grid (AF 63M12-0012). In 1986, Placer Development Inc. and Currie Rose Resources formed a joint venture partnership to explore the gold showings in the Porky-Pigeon Lakes area. The showings were mapped, stripped, trenched and sampled (63M12-0025). Between 1987 and 1988, the joint venture partnership exploration completed grid geological mapping, prospecting and rock and soil sampling of various showings within CBS 7057 (AF 63M12-0032). Work was concentrated on the Boundary and Currie Vein No. 10 showings. Between 1988 and 1990, a partnership involving Placer Dome (60%) and Currie Rose Resources (40%) completed mapping, prospecting, sampling, and ground VLF-EM and magnetic surveys over the showing grid (AF 63M12-0040). In 1990, G. Delaney geologically mapped the showing area for the Saskatchewan Geological Survey. On 25 April 1999, Claude Resources re-staked the showing as S-102740 as a part of the reduction of CBS 7057. In the winter of 2000, Claude completed 37 drill holes on the Porky Lake Au Showing (AF 63M12-NE-0049). In 2003, Claude Resources completed drill holes GAS03-01 to GAS03-03 on the GAS or West Porky Zone and drill holes PKY02-01 to -18 and PKY03-19 to -46 on the West Porky Main Zone (AF 63M12-NE-0052 or MEIP file 63M12-NE-0053). At the same time, ground magnetic and IP surveys were completed over the B grid which covers the showing. The better intersections encountered are reported above. Between 2003 and 2004, Claude completed 14 drill holes on the Porky Lake Main PG04-25 and -27 to 39) and 25 holes (PG04-1 to -24 and -26) on the Porky East-Pigeon South zones (AF 63M12-NE-0054). In the winter of 2004, Claude completed infill drilling on the Porky Lake Main and West zones (AF 63M12-NE-0057). This work, also, remains confidential. Between 2004 and 2005, Claude completed 51 drill holes on the Porky West and Porky Main zones and released reserves calculations results (AF 63M12-NE-0058 and MEIP file 63M12-NE-0059). This remains confidential. In 2005, Claude Resources received permission to go underground on the Porky West Deposit to recover a 5,000 tonne bulk sample. Work immediately commenced on a decline and the associated acces road and surface infastructure.
Production History
Production Period: 1991-01-01 to 2023-12-01 SSR Mining Inc.: Summary: - Gold
Reserves and/or Resources
2024-12-01 Summary: Porky West: Measured and Indicated Mineral Resource of 444,300.00 tonne - Gold: 74,900.00 troy oz @ 5.2 g/tonne (Cutoff: 2.61) Porky West: Inferred Mineral Resource of 1,088,600.00 tonne - Gold: 232,200.00 troy oz @ 6.6 g/tonne (Cutoff: 2.61) 2023-12-01 Summary: Porky West: Measured and Indicated Mineral Resource of 101,000.00 tonne - Gold: 12,000.00 troy oz @ 3.57 g/tonne (Cutoff: 3.26) Porky West: Inferred Mineral Resource of 175,000.00 tonne - Gold: 31,000.00 troy oz @ 5.48 g/tonne (Cutoff: 3.26) 2022-02-23 Summary: Porky West: Indicated Mineral Resource of 52,000.00 tonne - Gold @ 5.03 g/tonne (Cutoff: 2.07) Porky West: Inferred Mineral Resource of 516,000.00 tonne - Gold @ 4.42 g/tonne (Cutoff: 2.07) 2014-11-30 NI 43-101-compliant Measured & Indicated Resource for Porky Main of 160,000 tonnes grading 7.50 g/t Au for 38,600 oz. Inferred Resoure of 70,000 tonnes grading 10.43 g/t Au for 23,500 oz. Measured & Indicated Resource for Porky West of 100,700 tonnes grading 3.57 g/t Au for 11,600 oz. Inferred Resource of 174,800 tonnes grading 5.48 g/t Au for 30,800 oz. Summary: Porky Main: Measured and Indicated Mineral Resource of 160,000.00 tonne - Gold @ 7.5 g/tonne Porky West: Inferred Mineral Resource of 174,800.00 tonne - Gold @ 5.48 g/tonne Porky West: Measured and Indicated Mineral Resource of 100,700.00 tonne - Gold @ 3.57 g/tonne Porky Main: Inferred Mineral Resource of 70,000.00 tonne - Gold @ 10.43 g/tonne 2012-04-28 NI 43-101 compliant Measured & Indicated Resources Porky Main: 160,000 tonnes grading 7.5 g/t Au. Porky West: 110,974 tonnes grading 3.1 g/t Au. Inferred Resources Porky Main: 70,000 tonnes grading 10.43 g/t Au. Porky West: 138,300 tonnes grading 6.03 g/t Au. Summary: Porky West: Measured and Indicated Mineral Resource of 110,974.00 tonne - Gold @ 3.1 g/tonne Porky West: Inferred Mineral Resource of 160,000.00 tonne - Gold @ 6.03 g/tonne Porky Main: Measured and Indicated Mineral Resource of 160,000.00 tonne - Gold @ 7.5 g/tonne Porky Main: Inferred Mineral Resource of 70,000.00 tonne - Gold @ 10.43 g/tonne 2005-01-01 Porky West: indicated Resource of 90,000 grading 0.214 oz/ton and an inferred resource of 130,000 tonne grading 0.146 oz/ton Au. Porky Main: indicated Resource of 160,000 tonnes grading 0.219 oz/ton Au and an inferred resource of 70,000 tonnes 0.304 oz/ton Au. Summary: Porky West: Historic reserve (unspecified) of 70,000.00 tonne - Gold @ 0.146 oz/tonne Porky West: Historic indicated resource of 90,000.00 tonne - Gold @ 0.214 oz/tonne Porky Main: Historic reserve (unspecified) of 70,000.00 tonne - Gold @ 0.304 oz/tonne Porky Main: Historic indicated resource of 160,000.00 tonne - Gold @ 0.219 oz/tonne
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