Since 2008, the Company has consolidated a previously fragmented historic mining camp with mineral claims covering approximately 180,000 contiguous acres in South-central British Columbia, in the historically productive Republic-Greenwood Gold District, abutting the border with the United States.
The Republic-Greenwood Gold District has historically produced an aggregate of more than 6 million ounces of gold (“Au”) prior to Grizzly’s acquisition of the Greenwood Project. The Greenwood Project also sits less than 10 kilometres (“km”) north of the Buckhorn Gold Mine, Kinross” producing gold mine in the US, which had a 1.2 million ounce (“oz”) gold resource at 16 grams/tonne of gold (“g/t Au”) at start up in 2010, and less than 50 km north of the Golden Eagle Project, having greater than two million ounce gold resource. Based on compilation, assessment, and exploration work conducted by the Company, Grizzly believes that a large portion of the Greenwood Project lands over a continuation of the same geological structures as these two mines.
The Greenwood project consists of a number of Company managed exploration projects:
Grizzly Discoveries optioned the mineral rights to 317 hectares in seven (7) mineral claims in the Greenwood area, BC including the historical Silver (Ag)-Gold (Au)-Lead (Pb)-Zinc (Zn) Midway Mine and the Picturestone Quarry, which are about 4 km northwest of the town of Midway in the Kettle River Valley area of BC. The Midway – Picturestone mineral claims are strategically located within the Company’s Greenwood land holdings and in particular the Company’s Midway lands.
The Midway Mine and the Picturestone (aka Picture Rock) Quarry area have seen intermittent exploration and mining since the late 1800’s through to as recent as 2012. In the case of the historical Midway Mine, limited underground and open pit development has occurred. The Midway Mine and the Picturestone Quarry are situated within the “Midway Window”, a structural zone within the Toroda Graben exposing Late Paleozoic to Jurassic sediments, volcanics and intrusions, including the Knob Hill and Brooklyn formations, centered on an old thrust fault in a similar setting to the Golden Crown and Lexington Mine area near Greenwood, BC.
Highlights from 2022 Exploration Program on the Midway Mine:
- A total of 18 additional and new selective rock grab and composite rock grab samples from outcrop collected from the Midway Mine-Picturestone area, with 8 of 18 rock grab samples from outcropping mineralization in the Midway Mine area yielding a range of 0.119 grams per tonne (g/T) gold (Au) up to 12.85 g/T (or 0.375 ounces per ton [opt]) Au.
- Three (3) of the 18 new selective rock grab samples from the Midway Mine area yielded from 248 g/T silver (Ag) (7.2 opt Ag) up to 2,700 g/T Ag (78.8 opt Ag), with highly anomalous and associated lead (Pb), zinc (Zn), copper (Cu), arsenic (As) and antimony (Sb).
- All highly anomalous samples are from outcrop and characterized by the presence of abundant pyrite, arsenopyrite with visible galena and sphalerite in a siliceous chalcedonic host. The mineralization is hosted in polymetallic veins and altered wall rock that display the presence of Pb, Zn, Cu, As and Sb, and are likely epithermal in nature. Mineralized veins with northwest and northeast orientations were noted.
- Host rocks are altered with disseminated sulphide and are likely altered sedimentary rocks to altered intermediate intrusions including quartz-feldspar porphyry and diorite.
- A selective rock grab sample from outcrop 200 m west of the main Midway Mine yielded 15.85 g/T Au (0.462 opt Au) and 1,530 g/T Ag (44.6 opt Ag), illustrating that there is potential for additional high grade mineralization in the area.
Selected geochemical highlights for 12 rock grab samples* collected in the Midway Mine area.
*Selective rock grab samples are illustrative of the tenor of mineralization for the material collected but may or may not be characteristic of the overall mineralization of the deposit as they are selective in nature.
Discovery of the Imperial area mineralization dates to the late 1890’s with initial production first recorded in the early 1900’s. The historical Imperial Mine has seen intermittent production from the early 1900’s to as recently as 2011. According to the BC Government minfile records the historical Imperial Mine produced a little over 9,200 oz of silver and more than 20,000 pounds each of lead and zinc. The production records cover the period from 1914 to 1949 (BC MINFILE 082ESE113). Details of the total production during the 1990’s through to the 2000’s by the Cannon family is unknown. Open pit and underground mining were conducted during the period.
The historical Imperial Mine, is located on the eastern margin of the Kettle River, is underlain by a complex north-trending graben that exposes Paleozoic metasedimentary and metavolcanic rocks, which were later intruded by Jurassic diorite and granodiorite suites. Extension in the hanging wall terrane on the western margin of the Grand Forks complex led the formation of north-trending grabens and later, to favourable mineralization in the area. In the Eocene, alkalic intrusives, namely megacrystic granites and the Coryell intrusive suite and Eocene and younger coarse sediments and alkalic volcanic rocks filled these grabens. This led to localization of both base- and precious-metal deposits in the area (Höy, 2016).
At the Imperial Mine, the property is bounded to the north and south by the Nelson intrusions, consisting of granodiorite, porphyritic granite and diorite. In some locations, these cut the ultramafic rocks. The east is bordered by the Phoenix Volcanic Group of andesite and basalts. The west is predominantly drift covered in the vicinity of the property (Larabie, 1987). As exposed in the underground workings, mineralization is hosted in magnesium-iron rich carbonitized and silicified ultramafics along with sheared and sericitic greenstones and metasediments of the Upper Paleozoic Anarchist and Knob Hill Groups (BC MINFILE 082ESE113). In the early days of exploration, the mineralized rock was described as altered dolomitic sediment associated with abundant quartz and calcite, which had been altered by a green-coloured mineral, most likely chlorite and/or chromium mica or listwanite (Sloan, 1926).
The economic minerals of interest are mainly galena, sphalerite, and pyrite, all of which contain gold and silver. Mineralization occurs primarily in the carbonates as pods or lenses, and lesser as quartz sulphide veins and banded sulphides. These sulphides are confined to narrow quartz veins (0.3 – 1.0 m wide), along with some thicker pods which vary in dip from 20° to 80°. Precious-metal grades vary considerably throughout the underground workings as shown by assay maps from various exploration activities (e.g., 1925 and 1984) (Larabie, 1987).
Some gold occurs with the silver in the sulphides, along with pyrite and arsenopyrite but gold is also known to occur in a steep set of fractures with quartz veining that cuts orthogonally across the more flat-lying banded sulphide pods. The gold content increases as the fractures trend toward a Eocene Coryell intrusive, a couple of km to the east of the open pit.
The Imperial Mine target area is 815 ha (2,015 acres) and includes the Riverside Past Producer and Commonwealth showing north of the Imperial Mine. At Riverside, underground workings show that Ag-Pb-Zn+/-Au mineralization is also hosted in the metasedimentary rocks of the Upper Palaeozoic Anarchist and Knob Hill Groups. Polymetallic (Ag-Pb-Zn+/-Au) mineralization occurs in veins and along shears. The historical mine produced nearly as much silver as the Imperial Mine (BC MINFILE 082ESE114). At the Commonwealth showing, about 500 m northeast of the Riverside Past Producer, mineralization consists of pyrite, galena, sphalerite, and mariposite within 0.20 to 2 m wide quartz veins. These vein systems can be divided into two sets: one that strikes north-easterly and dips to the south, and the second, which also strikes north-easterly, but dips flatly to the southeast (BC MINFILE 082ESE115).
Limited Intermittent exploration, including some trenching, diamond drilling and small open pit mining has been conducted over the last 50 years in particular at the historical Imperial Mine. The Company plans to conduct reconnaissance exploration leading to more detailed exploration including additional surface sampling, ground geophysics, potentially underground sampling and eventually drilling and at the Imperial Target area during the upcoming 2023 field season.
The Company announced results from grab samples collected at the historical Imperial Mine, with the following highlights:
- A total of 83 new selective rock grab and composite rock grab samples collected from a number of outcrops across the 815 hectare (2,015 acre) Imperial Mine target area.
- A total of 10 of the 83 rock grab samples from outcropping mineralization yielding a range from 193 g/t silver (Ag) up to 1,810 g/t Ag (or 5.63 opt up to 52.8 opt Ag) and 1.41 g/t Au up to 11.05 g/t Au.
- The 10 new selective high-grade Ag-Au bearing rock grab samples from the historical Imperial Mine area were collected from five discreet areas of mineralization in and around the historical mine workings including from outcrop and underground.
- All highly anomalous samples are characterized by the presence of abundant and visible pyrite, galena and sphalerite in quartz veins and/or pods of silicified metavolcanic or metasedimentary rocks (Greenstones). The mineralization can be described as polymetallic veins and altered wall rock that display the presence of silver, gold, lead, zinc and minor copper and it is likely metasomatic in nature. Granodiorite and diorite intrusions have been noted nearby.
- High levels of chromium and nickel reflect the presence of altered ultramafic rocks with serpentine-carbonate alteration and commonly identified as listwanite.
- The Imperial showings, including the veins and pods of mineralization in the underground, line up north-south to northwest-southeast and are potentially associated with a thrust fault that is broken and somewhat lined up along a north trending structure near the eastern edge of the Rock Creek Graben or the western edge of the Toroda Graben.
- The grabens are characterized by north-northeast trending normal faults.
- The geological setting and style of mineralization at the Imperial Mine bears a strong resemblance to the setting at the Historical Midway Mine about 13.5 km to the southeast.
- The Company is planning surface and underground rock and soil sampling, mapping, ground geophysical surveys and eventually drilling.
Selected geochemical highlights for 24 rock grab samples* collected from the Imperial Mine area.
*Selective rock grab samples are illustrative of the tenor of mineralization for the material collected but may or may not be characteristic of the overall mineralization of the zone sampled as they are selective in nature.
The Sappho prospect, on which the Company conducted extensive exploration in 2009 and 2010, has yielded strong evidence of copper-gold-silver-platinum-palladium (“Cu-Au-Ag-PGE”) alkalic porphyry mineralization. Exploration at the Sappho zone has resulted in numerous high grade samples from the historic workings. However, the nature of its origin and the surrounding geology is not fully understood. The remaining area of the Sappho claim block is relatively underexplored compared to the extensive work at the main showings.
Three well documented surface copper occurrences in the northeastern portion of the complex yielded numerous high grade selective grab sample results including up to 8.28% copper (“Cu”) 298 grams per tonne (“g/t”) silver (“Ag”), 2.2 g/t gold (“Au”), 27.1 g/t Platinum (“Pt”) and 2.57 g/t palladium (“Pd”). All three occurrences yielded multi gram Pt and Pd values. The Sappho prospect is unusual relative to most British Columbia platinum group elements-bearing alkaline intrusive complexes, in that it contains Pt concentrations greater than Pd and Au. As reported in the Technical Report, government geologists have conducted extensive geochemical and mineralogical work on the Sappho alkaline complex and associated Cu-Ag-PGE-Au mineralization and, based upon textural and geochemical evidence, suggest that the mineralization is late magmatic or magmatic-hydrothermal in origin and bares mineralogical traits most common in alkaline porphyry style associated metals.
A drill program conducted by the Company in 2010 targeted two showings at the Sappho prospect, the Main and Northern showings, with a drillhole beneath each showing and two additional drillholes testing two proximal blind magnetic features with no previously known mineralization. The two holes beneath the Sappho Main and Sappho North showings intersected weak but anomalous Cu-Ag-PGE-Au. The best intersection was provided by drillhole 10SP03, which targeted a blind magnetic anomaly close to the Bodie Mountain fault and yielded a wide anomalous interval of 0.28% CuEq over 93.5 m core length including a higher grade zone of 0.38 % CuEq over 63.5 m core length that is comprised of 0.12% Cu, 8.68 g/t Ag, 0.22 g/t Au, 0.10 g/t Pd and 0.07 g/t Pt. This wide anomalous interval contains two higher grade intervals, an upper and lower zone, which yielded 1.43% CuEq over 7 m and 1.04% CuEq over 6.5 m core length, respectively. The mineralization in drillhole 10SP03 is hosted in a wide and intensely hornfelsed to skarnified pyroxenite that is brecciated and silicified in places. Hornfels alteration consists of biotite-garnet-magnetite and is associated with abundant pyrite and chalcopyrite. Further drilling will be required to follow up on the results of 10SP03.
- The Sappho area is being targeted for copper-gold-PGEs skarn and porphyry type targets associated with an alkalic intrusion and several diorite intrusions south of Greenwood near the US border.
- At least five new showings of copper oxide/sulphide mineralization were found during the 2022 program at the Sappho Target.
- Previous surface sampling and drilling by Grizzly at the Sappho area has yielded significant anomalous copper, gold, silver along with platinum and palladium.
- Numerous rock grab samples have yielded greater than 1% copper, 1 g/t gold, 1 g/t platinum and 1 g/t palladium. The sampling work in 2022 yielded 17 rock grab samples with >1% Cu up to 9.06% Cu.
- Historical drilling (by the Company) has yielded up to 0.31% Cu, 0.75 g/t Au, 0.34 g/t Pt, 0.39 g/t Pd and 6.57 g/t Ag over 6.5 m core length in skarn at Sappho in 2010.
Mineralization at Sappho 2022
Copper bloom at the Main Sappho Adit Showing
Motherlode was first staked and explored in 1891, with commercial production commencing in 1901. The mine and smelter closed in 1918 due to decreasing ore grades. Woodgreen Copper Mines Ltd. put the Motherlode Mine back in production in 1956 as an open pit operation, and operated the mine until 1962, at which time it was permanently closed.
The historic Motherlode underground and open pit mine produced close to 175,000 ounces of Au, 700,000 ounces of Ag and 77 million pounds of Cu at an average grade of 1.27 g/t Au, 5.04 g/t Ag and 0.82% Cu from a skarn between 1900 and 1962 (British Columbia Minfile 082ESE034).
A total of 1,722 m in nine core holes was completed at Motherlode North, approximately 500 to 750 m north of the historical Motherlode copper-gold-silver mine and 387 m in two core holes were completed at the Marguerite Target as part of the 2022 Phase 1 drilling program. The Company announced final results from 2022 exploration drilling at Motherlode North, with the following highlights:
- The Motherlode North polymetallic and skarn targets are comprised of copper-gold-silver +/- lead-zinc (Cu-Au-Ag +/- Pb-Zn) targets 500 to 750 m north and northeast of the historical Motherlode Mine (not owned by the Company), which produced significant amounts of Cu, Au and Ag including 173,000 ounces (oz) of Au, 688,000 oz of Ag and 77 million lbs of Cu between 1896 and 1918 and 1956 to 1963 (BC Minfile 082ESE034).
- Prior drilling by Grizzly intersected up 17.15 g/t Au, 41.7 g/t Ag, along with, 0.56% Pb and 1.51% Zn over 1.5 m core length at one of the skarn targets north of the Motherlode Pit.
- Skarn and sulphide rich mineralization, along with widespread hornfels and propylitic alteration have been intersected in most of the 2022 Motherlode North (22ML07 to 15) and the two (22MR01 & 02) Marguerite core holes.
- Final assay results for the nine Motherlode holes have yielded anomalous Au, Ag, Cu, Pb and Zn in every hole with a best high-grade sample of 5.86 g/t Au and 6.36 g/t Ag over 1 m core length along with several wide low grade intersections in particular adjacent to porphyritic intrusions in Triassic sulphide rich hornfelsed or skarnified Brooklyn sedimentary rocks.
- A number of the Motherlode North holes have yielded wide low grade Au-Ag+/-Cu-Zn intersections such as hole 22ML07 with 0.415 g/t Au, 2.19 g/t Ag, 0.019% Cu and 0.08% Zn over 17.56 m core length, along with hole 22ML08 with 0.108 g/t Au, 2.43 g/t Ag, 0.013% Cu and 0.059% Zn over 11.09 m core length and 0.332 g/t Au, 2.63 g/t Ag and 0.053% Zn over 15 m core length, interpreted to be part of a large alteration footprint in a well mineralized skarn-porphyry system.
- The porphyritic intrusions are widespread and are likely Cretaceous or Eocene in age. Sulphide mineralization with anomalous geochemistry appears to be spatially associated with these intrusions.
- The two holes in the vicinity of the Marguerite historical shaft intersected near surface skarn with anomalous Au-Ag-Cu and deeper hornfelsed sediments and breccias that are silica-sulphide rich and with widespread anomalous Cu over 50 to 100 m in thickness (Holes 22MR01 and 02). The deeper mineralization is associated with propylitic alteration and potentially could highlight deeper copper-gold porphyry potential beneath the Motherlode area skarn system.
- Holes 22MR01 and 22MR02 returned upper skarn related zones of 0.442 g/t Au, 5.61 g/t Ag and 0.028% Cu over 5.32 m, and 0.227 g/t Au, 4.36 g/t Ag and 0.037% Cu over 9.5 m core length.
- The lower highly anomalous copper-gold rich zones are highlighted by 0.123 g/t Au, 2.06 g/t Ag and 0.127% Cu over 8 m core length in hole 22MR02, but this is contained within a 46 m wide zone to the end of the hole where all but 4 of 45 samples yielded >100 ppm Cu up to 1,980 ppm Cu.
- Similarly, in hole 22MR01, there is lower zone of copper rich mineralization that is 119 m in thickness to the end of the hole where 80 of 116 samples yielded >100 ppm Cu up to 1,600 ppm Cu.
- Although low grade, the wide highly anomalous intersections of low to moderate grade gold and copper are likely indicative or part of a large mineralized hydrothermal system.
Motherlode North & Marguerite 2022 Drill Program
The Ket 28 gold target is located in a road accessible, proven and prolific area, adjacent to the US border in south-central British Columbia, Canada.
Highlights for 2022 soil and rock sampling program at the Ket 28 prospect:
- First significant systematic regional sampling program with more than 1,000 soil samples collected in a 100 m by 200 m grid pattern and analyzed for gold and multi-elements using a partial extraction ionic leach method at ALS Global in Vancouver, BC
- New anomalous gold zones in soils identified immediately southwest of the main Ket 28 showing along with at least four new areas of anomalous gold in soils identified in an area that is about 2.5 km south of Ket 28 and is over 5 km in length and roughly 1.2 km wide up against the US border
- A total of 129 rock grab samples collected across the Ket 28 area with up to 1.5 g/t gold from a sample within the southern anomalous gold in soil area
- Numerous northwest and northeast controlling structures within Paleozoic Anarchist volcanic (green) clastic and calcareous sedimentary rocks (orange and blue) along with a number of small to large sized Cretaceous to Eocene (pink) intermediate to felsic intrustions are visible in outcrop and in the geophysics
Ket 28 Drillholes, 2022 Rock & Soil Samples, Rock Creek Geology
Ket 28 Drillholes, 2022 Rock & Soil Samples, Rock Creek Magnetics
2020 Drill Program Gold Target Highlights:
- Results from the last nine holes intersecting broad, near surface gold mineralization. Key intervals include 0.92 grams per tonne (g/t) gold (Au) over 14 m from 27 m including 4.53 g/t Au over 2 m, (20KT14) and 0.48 g/t Au over 11.84 m from 20.16 m) including 3.6 g/t Au over 1 m from 20.16 m (20KT13) (Table 1).
- Results from the first six holes intersecting broad, near surface gold mineralization. Key intervals include 1.59 g/t Au over 17.8 m from 43 m including 7.37 g/t Au over 3.08 m, (20KT02) and 0.77 g/t Au over 31 m from 54.5 m) including 1.42 g/t Au over 11.5 m from 61 m (20KT04) (Table 1).
- The Ket 28 Target remains open with multiple zones to below a 125 metre vertical depth towards an underlying and potentially larger porphyry type feature represented by a large 1 km by 2 km geophysical anomaly;
- All drill-holes intersected variable amounts of sericite-pyrite alteration with quartz veins and silicification hosted in a sedimentary schist, mafic volcanic to basalt package of rocks;
- Drilling has expanded the volume and extent of gold mineralization at surface and to depth, with a strike length of greater than 500 m, a width of about 100 m and multiple near flat lying zones intersected from surface up to a depth 125 m depth
- Diamond drill program consisted of 1,975m in 15 drill holes
Ket 28 2020 Drill Hole Locations
The Company conducted an exploration program in 2009-2010 consisting of rock and HMC sampling, ground geophysics, and a nine diamond drill hole program. Rock samples near the Ket 28 prospect in the Rock Creek Block yielded assays up to 53.2 g/t Au. A ground magnetics and horizontal-loop electromagnetic (“HLEM”) survey was completed over the Ket 28 prospect and indicated the presence of a northwest oriented structure and a large magnetic anomaly of which the Northwest edge is associated with Au mineralization. Drilling at the Ket 28 target indicates the presence of wide zones of hydrothermal Au-Silver (“Ag”) associated with extensive alteration along a northwest structure. The best drill intersections obtained during the Company’s exploration work are 11.9 g/t Au across 2.0 m core length and 8.85 g/t Au across 3.0 m core length.
Planned exploration for the Ket 28 includes a program of up to 11 drill holes, with the focus to develop a maiden resource.
During late 2017, the Company performed an initial review to see if its land holdings were prospective for the presence of cobalt (Co). The strategic review identified the presence of at least 13 rock grab samples with greater than 0.05%, including up to 0.10% Co, from at least five separate target occurrences across the eastern half of Grizzly's Greenwood Project area. The database shows an additional 31 rock grab samples that have yielded assays of between 0.02 and 0.05% Co. Maps showing the anomalous values and locations for Co at the Greenwood Project:
A preliminary review of the sample database indicates that many of the rock samples with anomalous Co also contain anomalous values for Cu and precious metals including Au and Ag. In many cases, the samples with anomalous Co were collected from Cu-enriched skarn and hornfels developed in Paleozoic sediments and intrusions, where the original sampling targeted precious metals. Grizzly has initiated a property wide review, including its extensive soil and drillhole database along with much of the historic data for the district that it has compiled over the years. The goal will be to target potential Co-Cu-Au-Ag mineralization associated with skarn across the district and come up with targets for follow-up exploration during 2019.
Greenwood West Cobalt in Rocks
Greenwood East Cobalt in Rocks