The Big Missouri deposit lies within the Stewart Complex, a belt of deformed volcanic, sedimentary and metamorphic rocks belonging to the Lower-Middle Jurassic Hazelton Group. The complex is situated between the Coast Crystalline Belt to the west and the Bowser Basin to the east. The Hazelton rocks are intruded by granodiorite of the Early Jurassic Texas Creek Plutonic Suite and are cut by andesite, granitic and lamprophyre dykes of Tertiary age. The Portland Canal dyke swarm occurs to the north.
The host rocks consist of south-southeast striking, moderately dipping andesite, agglomerate and lapilli tuff with interbedded cherty tuff of the Unuk River Formation (Hazelton Group). The rocks are weakly schistose and have undergone several periods of faulting. To the east, the andesites are overlain by sediments, tuffs and siltstones of the Betty Creek, Mount Dilworth and Salmon River formations respectively, all Hazelton Group.
Three mineralized horizons, consisting of several cherty tuff bands with disseminated sulphides to semi-massive sulphide lenses, occur within the andesites. The cherty tuff horizons are silica-rich beds containing sericitized and silicified (bleached) andesite fragments, occasional rounded chert fragments, variable amounts of carbonaceous material, carbonate and sulphide minerals. North striking vertical faults locally juxtapose the mineralized cherty tuff with the bleached andesite horizons. The Lower Horizon contains the Dago Hill zone (104B 045), the Middle Horizon contains the S-1 (104B 084) and Big Missouri zones, and the Upper Horizon contains the Province East (104B 147) and Province West (104B 136) zones.
Stratabound semi-massive to massive lenses, pods and stringer zones of pyrite, sphalerite, galena and chalcopyrite with gold and silver occur within and at the contact of thin cherty tuff beds. The massive sulphides are well laminated in beds up to 0.3 metres thick, generally at the base of the cherty horizon. Electrum, acanthite, native silver, native gold, tetrahedrite, argentite, polybasite, pyrargyrite and freibergite occur as small grains on grain boundaries and fractures in the sulphides and within quartz gangue.
The footwall andesites are silicified and contain abundant sericite, chlorite, carbonate minerals and fine disseminated pyrite. Andesites overlying the cherty tuff beds are more intensely sericitized and silicified. The Middle Horizon contains abundant calcite and iron carbonate.
In addition to the stratabound mineralization, numerous late quartz-carbonate-chlorite veins containing coarse-grained pyrite, sphalerite and galena crosscut the altered andesites and cherty tuffs.
The mineralized, stratabound cherty tuff and the silica and sericite altered andesite are interpreted to have formed on or near the seafloor, as the result of submarine exhalative activity. The quartz-carbonate-sulphide breccia and stringer zones were either remobilized from the cherty tuff beds into the overlying andesite or precipitated from ongoing exhalative activity (Canadian Institute of Mining and Metallurgy Special Volume 37).
The Big Missouri deposit was mined from 1927 to 1942 mainly from the A zone. This zone consists of an area measuring about 20 by 75 by 150 metres, along a north-northwest trend.
A total of 768,941 tonnes of ore were mined, mostly from 1938 to 1942 inclusive. (This includes 23,223 tonnes in 1931 and 5 tonnes in 1927.). Total recovery included 1,815,918 grams gold, 1,638,412 grams of silver, 1,778 kilograms of zinc and 1,230 kilograms of lead.
Systematic drilling in the Big Missouri area to 2015 demonstrated that the different zones and showings were essentially a single and continuous mineralized system. The system is a gently west to gently east dipping structure with quartz stockwork and quartz breccias bodies and silicification coring a zone within a quartz-sericite-pyrite-carbonate shell averaging 100-150 metres thickness, which is substantially wider than mineralized zones seen at the Premier Mine area. Outside of this zone is a pyrite-chlorite-carbonate propylytic halo ranging to an additional 100 metres thickness. Previously there was no recognition of Premier Porphyry in this area, but more recent drilling has encountered numerous sills and lobate lenses of Premier Porphyry along the eastern portion of the zone and drilling is now finding a few new Premier Porphyry bodies in the western Porphyry along the eastern portion of the zone and drilling is now finding a few new Premier Porphyry bodies in the western Northstar zone. Gold and silver values are closely associated with silicification and gold occurs dominantly as electrum with native gold present erratically silver occurs in several modes as its native form, electrum, argentite and friebergite. The most common sulphides consist of pyrite, sphalerite with minor galena and chalcopyrite and trace pyrrhotite. The western areas tend to have higher sulphide contents and a greater abundance of sphalerite and galena. The eastern portions have generally lower sulphide contents and a greater range of sulphosalts including as a majority of the argentite, friebergite and tetrahedrite and typically the eastern portions contain higher silver/gold ratios to those seen on the west side. This zonation suggests the west side is the deeper portion of the system and the east is the higher portion of the hydrothermal system and this is supported by the stratigraphic sequence. In a larger scale, the western portion of the Big Missouri area and the Martha Ellen contain higher base metals contents and the eastern portion of the Big Missouri area and the Dilworth have higher silver/gold ratios. This pattern is similar to that seen as vertical zonation at the Premier Mine. It is interesting that QSP alteration also becomes more abundant and develops as a thicker package on the eastern side of the system perhaps a swelling of the alteration at higher levels or a closer association with Premier Porphyry bodies. Higher gold and silver grades are closely related to quartz veins, stockwork and most consistently siliceous and quartz breccias bodies.
The Big Missouri mine area includes Big Missouri (104B 046), S1 (104B 084), Province (104B 147), Northstar (104B 146), Dago (104B 045), Creek (104B 086) deposits and the Day (104B 151), Province West (104B 136), Calcite Cuts (104B 148), Golden Crown (104B 149), and Unicorn (104B 044) occurrences, all which encompass an area reported to be 2,200 metres north-south and 1,400 metres east-west (Assessment Report 35410 (April 2015)).
After the Ascot Resources’ 2012 drilling and exploration program in the Big Missouri and the Martha Ellen areas an updated resource estimate incorporated the Big Missouri and the Martha Ellen (104B 092) deposits and replaced the previous mineral resource estimate for the Big Missouri, yet did not include the Dilworth (104B 038, 039, 142) area. In March 2014, Ascot commissioned an updated independent NI43-101 compliant mineral resource estimate for the Premier-Dilworth deposit which incorporated a total of 647 DDH (141,166 metres) covering the Big Missouri, the Martha Ellen, and the Dilworth deposits (Assessment Report 35410, page 21).
The Big Missouri, the Martha Ellen, and the Dilworth target areas are in the northern portion of the Premier-Dilworth property and are believed to originally be one large uniform system but are offset by post mineral thrust faults, strike slip faults, and younger dike swarms
The Martha Ellen zone (104B 092) is located adjacent to the northwest end of the Big Missouri zone. In 2015, this zone was determined to be approximately 1400 metres North-South by 600 to 800 metres East-West. The area is believed to be a northerly extension of Big Missouri zone across the left lateral Hercules fault. The Dilworth zone (104B 038, 039, 142) is located 500 metres north of Martha Ellen across an interval of northwest striking Eocene Portland canal dikes swarm. Mineralization is intermittently present within the dike swarm and the Martha Ellen and the Dilworth were likely originally part of the same system. The Dilworth includes the Chicago, Hammer, Yellowstone, 49er, Sparky, Oxidental, and Chalet zones that (in 2015 (Assessment Report 35410) extended for 1800 metres north to south and averaged 600-800 metres in an east-west direction. The Big Missouri, Martha Ellen and Dilworth areas stand out as a strong K and Th/K anomaly on airborne radiometric surveys.
Characteristic of the Premier-Dilworth-Big Missouri Quartz breccias or siliceous breccias is the association of quartz-sericite-pyrite (QSP) alteration halos and represent silica flooding, silicification and intense quartz stockwork which contain a majority of the precious metal mineralization of a low sulfide to transitional epithermal precious metal nature. Originally, siliceous breccias were interpreted as a sedimentary horizon of cherty tuff exhalite origin by Westmin due to their textures and erratic nature. They are now considered to be a secondary process of quartz alteration of Andesites or Premier Porphyries. Quartz breccias show consistent continuity in the Big Missouri, the Martha Ellen, and the Dilworth areas and in the Premier Mine area.
Various styles of alterations are recognized in these areas: quartz-sericite-pyrite (QSP), potassic, chlorite, hematite, carbonate, and secondary biotite alterations. Mineralization is mainly hosted in breccia bodies, also in quartz stockwork and veining. Quartz breccias can display multiple phases of silicification with up to five to six sequences of silicification noted in some breccias. Zoning of alterations halo could sometimes be present in the proximity of siliceous breccia bodies transiting from sericite/silica alterations to sericite/potassic alterations and to distal chlorite alteration. Pyrite mineralization appears related to quartz veins and zones of intense silicification with base metals observed as sphalerite and galena and lesser amount of chalcopyrite, tetrahedrite, and sulfosalt. Native silver and gold and electrum have occasionally been seen in high angle quartz veins and quartz breccia bodies. The styles of alterations, mineralization, and brecciations in the Premier Mine area and the Big Missouri, the Martha Ellen, and the Dilworth areas are very similar. One difference appears to be the alteration and mineralization tend to be more focused and grades are typically higher in the Premier Mine area and in the Martha Ellen area and are relatively more widespread with greater quartz stockwork in the Big Missouri and the Dilworth areas.
Measured geological combined reserves for the S-1 (104B 084), Dago Hill (104B 045), Province (104B 147), Martha Ellen (104B 092), Northstar (104B 146) and Creek (104B 086) deposits are 1,685,200 tonnes grading 3.12 grams per tonne gold and 22.98 grams per tonne silver, at a waste-to-ore strip ratio of 3.7:1 (George Cross News Letter No.102, 1988).
Ascot published its first gold resource by Kirkham Geosystems for the Big Missouri area in 2012 based on the 2009 to 2011 drilling results from 228 DDH of 58746.81 metres. At a 0.2 gram per tonne gold cut off grade, the indicated mineral resource was estimated at 53,934,000 tonnes grading 0.744 gram per tonne gold and 4.6 grams per tonne silver and in the inferred category an additional 63,377,000 tonnes were estimated, grading 0.487 gram per tonne gold and 3.3 grams per tonne silver (Press Release, Ascot Resources, May 2, 2012).
In the 2012 season, a total of 166 DDH were completed for a total of 36941.80 metres. P&E Mining Consultants Inc. prepared and released an updated resource in February 2013 based on the addition of 54 DDH of 8,784.66 metres in the Martha Ellen area and 93 DDH of 23,218.30 metres in the Big Missouri area with the 2009-2011 drilling. The indicated category (at 0.25 gram per tonne gold cut-off), for the combined resources (in 2013) of the Big Missouri and the Martha Ellen deposits totaled 89,420,000 tonnes grading 0.77 gram per tonne gold and 5.3 grams per tonnes silver and; in the inferred category, 20,489,000 tonnes grading 0.67 gram per tonne gold and 4.5 grams per tonne silver (Press Release, Ascot Resources, for February 13, 2013 and October 23, 2013).
Broken down by individual deposit are as follows. In 2013, the Big Missouri was estimated to contain 80,980,000 tonnes in the indicated category grading 0.76 gram per tonne gold and 5.1 grams per tonne silver and; in the inferred category, the Big Missouri contained 19,935,000 tonnes grading 0.67 gram per tonne gold and 4.3 grams per tonne silver (Press Release, Ascot Resources, for February 13, 2013 and October 23, 2013). In 2013, the Martha Ellen was estimated to contain 8,433,000 tonnes in the indicated category grading 0.87 gram per tonne gold and 7.6 grams per tonne silver and; in the inferred category, the Martha Ellen contains 554,000 tonnes grading 0.83 gram per tonne gold and 12.0 grams per tonne silver (Press Release, Ascot Resources, for February 13, 2013 and October 23, 2013).
An updated resource compiled by Ronald G. Simpson, P.Geo, of the GeoSim Services Inc. was released in March 2014 based on the additional of 146 DDH for a total of 25742.88 metres completed in the 2013 drilling program and included the Big Missouri, Martha Ellen and, for the first time, Dilworth deposit areas.
In the indicated category (at 0.3 gram per tonne gold cut-off) the 3 combined deposits totaled 93,502,000 tonnes grading 0.82 gram per tonne gold and 6.9 grams per tonnes silver and; in the inferred category, 79,278,000 tonnes grading 0.59 gram per tonne gold and 7.2 grams per tonne silver (Press Release, Ascot Resources, March 31, 2014).
Individual deposit resource contribution is as follows. The Big Missouri contains 61,859,000 tonnes in the indicated category grading 0.91 gram per tonne gold and 5.8 grams per tonne silver and; in the inferred category, the Big Missouri contains 34,665,000 tonnes grading 0.74 gram per tonne gold and 8.0 grams per tonne silver (Press Release, Ascot Resources, March 31, 2014). The Martha Ellen contains 8,345,000 tonnes in the indicated category grading 1.15 grams per tonne gold and 9.9 grams per tonne silver and; in the inferred category, the Martha Ellen contains 3,236,000 tonnes grading 0.70 gram per tonne gold and 11.6 grams per tonne silver (Press Release, Ascot Resources, March 31, 2014). The Dilworth contains 23,298,000 tonnes in the indicated category grading 0.48 gram per tonne gold and 8.8 grams per tonne silver and; in the inferred category, the Dilworth contains 41,377,000 tonnes grading 0.45 gram per tonne gold and 6.1 grams per tonne silver (Press Release, Ascot Resources, March 31, 2014).
Several claims were located on the showings by prospectors Dan and Andrew Lindeborg in 1904. Included among these were the Rambler (Lot 3206) and Buena Vista (Lot 3207). Other claims subsequently located included the Province (Lot 3208), Golden Crown (Lot 3210), and Big Missouri (Lot 3217). Exploration work was begun in open cuts and short adits. In 1910 the Golden Crown group of 14 claims was under bond to the Pacific Coast Exploration Company, Limited. The Golden Crown Mining Company, which was apparently an American company may have held some of these claims under option during 1911 to 1912. The owners, D. Lindeborg and Hiram Stevenson, resumed work on the Province and Big Missouri claims in 1913.
The Gastineau Mining Company, of Juneau, Alaska, held the property under bond in 1914 and 1915. The owners obtained Crown-grants to 15 full and 5 fractional claims in 1916. Later in the year, the property was bonded to H.W. Witt of Goldfields Nevada, but no work was reported at that time. In 1918, the property was again bonded to The Pacific Coast Exploration Company, Limited, and operations continued into 1920. Work by the company was done on the E. Pluribus and Laura claims, adjacent to the Mineral Hill property and included open cutting, 110 metres of underground work in one adit, and 730 metres of diamond drilling in 9 holes. From 1922 to 1924, the property was under bond to Misters Trite and Wilson and some work done in open cuts, old adits, and a vertical shaft.
The Standard Mining Corporation of Tacoma, Washington, bonded the property from D. Lindeborg in 1925 and formed Big Missouri Mining Company, to carry on development. Most of the work was done on the Golden Crown and E. Pluribus claims; activities ceased sometime in 1926.
Buena Vista Mining Company, Limited was formed by The Consolidated Mining and smelting Company of Canada Limited (53 per cent) and Big Missouri Mining Company (47 per cent) in September 1927. A long crosscut (Province Tunnel) was begun on the east side of the ridge and some 1463 metres of drifts and crosscuts were run to explore the Province orebody. Intensive diamond drilling was done and in December 1930 a 91 tonne per day concentrator was put into operation to test the ore. Operations were discontinued in September 1931.
Big Missouri Mines Corporation was formed in August 1933 to acquire the assets of Big Missouri Mining Company. Buena Vista Mining Company was now owned by The Consolidated Mining and Smelting Company of Canada Limited (60 per cent) and Big Missouri Mines Corporation (40 per cent). Work resumed in 1934. The Day Fr. (Lot 4132), on the west side of the ridge, was acquired as a site for low-level access to the Province mineralized zone. Two crosscut adits were driven north-easterly into the Province claim and a 680-tonne mill was built underground between the 2100 and 2300 foot levels, with surface access on the Salmon Glacier side of the ridge. In 1935 the Hercules property was optioned. During 1937, the 306 drift from the Province adit was extended north a further 66 metres with the objective of developing the Hercules property from this level (2800), however, this plan was apparently not followed through.
Development work continued on the Province claim and in March 1938 a 780 tonne per day underground mill was put into operation. The mill operated until the early months of 1942 when the mine was closed and abandoned. Underground development work during the period 1935 to 1942 totalled over 7000 metres of drifts, crosscuts, and raises and over 4875 metres of diamond drilling. Total underground development work on the property is over 9450 metres in 4 or more adits and several shallow shafts. A tonnage and grade estimate made in 1936 as a result of several years of detailed studies suggested a probable reserve of 1,671,300 tonnes at 4 grams per tonne gold per tonne. The main or 326 orebody, located on the Province claim and included in these estimates, had a dip length of 150 metres, with mining widths from 2.3 metres at 8.91 grams per tonne gold to 16.75 metres at 6.86 gram per tonne gold (Bulletin 58, p. 126). Subsequent production during the period March 1938 to early 1942 totalled slightly less than 768,773 tonnes. Numerous other small quartz-calcite-sulphide zones occur on the Big Missouri property and on the adjacent Unicorn and Hercules properties. "In 1966, D.B. Brown's assessment of these claims and their mineral potential indicated that there were probably less than 181,000 tonnes of ore grade mineralization currently available and that the over-all grade was less than 3.43 grams per tonne gold and less than 34.29 grams per tonne silver" (Bulletin 58, p.127).
In 1952 a syndicate, name unknown, in which Gwillim Lake Gold Mines Limited held a 30 per cent interest, is reported to have held 3 of the claims but no work was reported at that time.
The property, as subsequently held by the Stewart Wilkstrom interests, consisted of the M 51, M 52, and M 118 mineral leases comprising 10 Crown-granted claims, the Province Crown grant, and the Day group of 5 Crown-granted claims. Falconbridge Nickel Mines Limited held the property under option and during 1966 to 1967 carried out geological mapping and a geochemical survey. Twayco Explorations, of Hyder, Alaska, optioned the property in 1969 and carried out trenching and sampling of quartz sulphide masses exposed along the ridge. El Paso Mining and Milling Company optioned the property in 1970 and carried out a geochemical soil survey over Mineral Lease Nos. 51 and 52.
An airborne geophysical survey was carried out in the area on behalf of Atna Mines in 1969 (Assessment Report 2320).
Consolidated Silver Butte Mines Ltd. in June 1972 acquired 5 claims including the Province and Big Missouri, and the Hercules group, from Thomas S. MacKay. Giant Mascot Mines Limited optioned the property late in 1973. Surface diamond drilling on the Province claim during 1974 totalled 822 feet in 11 holes. The option was subsequently given up. Northern Homestake Mines Ltd. held an option on the property for a brief period in 1975 but no work was reported. Canex Placer Limited optioned the property later in 1975. Work included a geochemical soil survey (96 samples). The option was subsequently given up.
Tournigan Mining Explorations Ltd acquired the property from Consolidated Silver Butte by an agreement of April 21, 1976. In May 1976, Tournigan optioned the property to Tapin Copper Mines Limited. Work by Tapin included an induced potential survey over 14.4-line kilometres on the Big Missouri and Unicorn properties, 177 metres of diamond drilling in 8 holes on the Creek and S-l zones, test pitting, and underground sampling. The option was subsequently abandoned. Additional ground was acquired in 1977 to a total of 74 claims.
Tournigan during 1978 carried out adit and shaft rehabilitation, surface and underground sampling, and 670 metres of diamond drilling, including 8 holes near the Dago shaft. Surface mineralization on the Province claim, 650 metres west of the shaft, was sampled in 50 surface trenches.
In December 1978, Tournigan optioned a 77.5 per cent interest in 7 claims, centered on the underground workings of the Province claim, to Western Mines Limited. Work by Western during 1979 and 1980 included geochemical and geophysical surveys and diamond drilling in 40 holes. Western changed its name in March 1981 to Westmin Resources Limited. Work during 1981 included rehabilitation of underground workings, diamond drilling in 61 holes (2622 metres) and percussion drilling in 173 holes (2932 metres). Diamond drilling in 1982 totalled 3410 metres in 86 holes. Based on this work open pit material in the Province, Dago, Martha Ellen and S-1 zones was estimated at 1,723,300 tonnes grading a gold/silver equivalent of 3.43 grams per tonne gold; individual zone estimates are: Province, 308,380 tonnes grading 2.50 grams per tonne gold equivalent; Dago, 671,180 tonnes grading 3.53 grams per tonne gold equivalent; S-1, 181,400 tonnes grading 3.19 grams per tonne gold equivalent; and Martha Ellen, 562,340 tonnes grading 3.81 grams per tonne gold equivalent (Northern Miner December 5, 1983).
Further diamond drilling included 999 metres in 17 holes in 1983, mainly on the Martha Ellen zone, and 305 metres in 6 holes on the Dago zone in 1984. Drill indicated geological reserves were reported as 1,965,469 tonnes at 3.36 grams per tonne gold equivalent (Westmin Resources, 1983 Annual Report).
Exploratory drilling in 1986 and 1987 totalled some 9500 metres in 153 holes. The 1986 and part of 1987 work was funded by Canacord Resources Inc., the company thereby earning an 18.75 per cent interest in the interest held by Westmin. To combine the Big Missouri and Silbak Premier properties into one operation (named the Premier Gold Project), Westmin obtained an agreement whereby Tournigan Mining Explorations Ltd exchanged its 30 per cent net profits interest in the Big Missouri for a 5 per cent net profits interest in the combined operation. Interest in the project was then 50.1 per cent Westmin Resources, 40.0 per cent Pioneer Metals Corporation, and 9.9 per cent Canacord Resources. A feasibility study was carried out in 1987. Reserves at the Big Missouri in four zones were reported as open pit mineable 1,632,600 tonnes at 3.60 grams per tonne gold, 29.49 grams per tonne silver (Westmin Resources Limited, 1987 Annual Report). Construction of a 1814 tonne (2,000 ton) per day mill at the Silbak property began in April 1988.
In 1991, Westmin Resources had an airborne magnetic and electromagnetic survey conducted over the Premier Gold property totalling 760 kilometres (Assessment Report 21993). This survey covered an extensive area from the south end near the Premier mine area and north to the Yellowstone (104B 039) area.
1n 1992, a program of mapping and sampling of the Salmon River and Dilworth formations in the greater Big Missouri area was conducted by Westmin (Assessment Report 22698). Several styles of mineralization were identified. Results were reported for the Silver Tip (104B 043), Silver Crest (104B 042), Bella Coola and H vein (104B 213).
Ascot Resources Ltd conducted exploration on the Dilworth Property in 2007 and 2008 and subsequently acquired the Premier Gold Property from Boliden Ltd under the terms of a 2009 option agreement. The 2008 exploration program of Ascot Resources Ltd conducted on the Dilworth property included diamond drilling, surface rock sampling, geological mapping, a 428.2-kilometre airborne Mag/EM survey and airborne radiometric survey, geochemical sampling including contour sampling, a soil grid and stream sediment sampling of all streams on the west and east sides of the property (Assessment Report 31000). Diamond-drilling in 2008 totalled 10885.1 metres in 63 holes. Only the airborne survey extended off the Dilworth property to the south covering parts of the Big Missouri (104B 046) and further south to the Premier (104B 054). During 2009 (Assessment Report 31489) and 2010 (Assessment Report 32357) all exploration activity by Ascot was conducted on the Premier and Big Missouri Properties.
In 2009 a total of 7465.3 metres were drilled in 48 holes into multiple zones including 3rd, Premier, Power, Hope, Loui's, S1, Northstar, Province, Martha Ellen, Montana, Rambler, Silver Tip, Unicorn, Golden Crown and Mudstones.
In 2010 a total of 21,742 metres in 68 holes were drilled into a number of zones from the combined Dilworth and Premier properties of Ascot including: Unicorn, A-Vein, S1, Creek, Calcite Cuts, Province, Day, Martha Ellen, Sparky, Bee, Forty Nine and Gerrys zones. Twenty seven holes were drilled on the Unicorn zone (104B 044) and 17 holes were drilled on the Province zones about 300 metres west of the Unicorn.
In 2011, Ascot Resources Ltd drilled 36,318 metres on the Big Missouri and Dilworth properties. The 150-hole program tested bulk tonnage and high-grade underground gold-silver vein targets. The Big Missouri zone (MINFILE 104B 092) was drilled on 50 metres centres in support of calculating an initial resource. Drilling was also completed in the Province (104B 147) and Unicorn (MINFILE 104B 044) in the Big Missouri area following up lower grade gold intercepts.
In 2012, Ascot Resources Ltd conducted a significant drilling program spread across three areas: Big Missouri (MINFILE 104B 046), Martha Ellen (MINFILE 104B 092) and Sparky zone in the Dilworth (104B 039). A resource estimate for the Big Missouri area utilizes drilling data from 2009 to 2011 was released in May.
In 2013, Ascot Resources completed 25,742 metres of drilling in 145 holes spread between Premier (104B 054), Martha Ellen (104B 092), Province, S1 and Unicorn zones. Drilling successfully expanded and confirmed bulk-tonnage and high-grade underground gold-silver targets. Ascot released an increased resource estimate for the Big Missouri, which included Martha Ellen (104B 092) data.
In 2014, Ascot Resources Ltd. continued drilling at the Premier and Big Missouri gold projects. Drilling of a multiphase program consisted of 36,672 metres in 169 holes. The work identified a new area of mineralization at Big Missouri before focusing on zones around Premier. A resource estimate for the Big Missouri (including the Dilworth, Martha Ellen and Big Missouri deposits) was released this year.
In 2015, Ascot Resources completed 40,892 metres of diamond drilling in 198 holes on its combined Premier-Big Missouri-Dilworth property. Broader high-grade gold zones were also intercepted, in particular at the Lunchroom subzone (Premier mine area) where hole P15-914 yielded 14 metres averaging 113.53 grams per tonne gold (Exploration in British Columbia, page 133). Hole P15-846, in the Lunchroom subzone, yielded several multi-ounce intersections, resulting in an uncut average of 11.12 grams per tonne over the entire length of the 118.27-metre drill hole (Press Release Ascot Resources, September 4, 2015). The most spectacular of these intersections was a one-metre interval which graded 880 grams per tonne gold (Press Release Ascot Resources, September 4, 2015).
In 2016, Ascot Resources Ltd drilled 69,123 metres in 279 holes at the Premier gold-silver project.
In 2017, Ascot Resources limited carried out 118,800 metres of drilling in 379 holes. Focus was on the Northern Lights area where the Ben and Prew subzones were discovered. Also tested was the Premier area near Subakwe and the areas between Big Missouri and Martha Ellen and areas west of Martha Ellen. The Premier project is under option from Boliden Ltd and Ascot was to acquire 100 per cent of the project by making a payment of $4.775 million on or before June 30, 2017
The Premier property covers more than 100 square kilometres near the town of Stewart in northwest BC. The property is long and narrow, extending more than 22 kilometres north to south. The Premier mine is located at the south end of the property, roughly 7 kilometres south of the three deposits Ascot has outlined at Premier (104B 054), which are known as Big Missouri, Martha Ellen, and Dilworth. Refer to all these occurrences for further information including bibliographic.
In 2018, Ascot Resources Ltd. completed a drilling program comprising 171 holes, totalling 27,681.2 metre, on the Premier, Big Missouri and Martha Ellen occurrence and an induced polarization survey to the north and south of the Premier occurrence and between the Big Missouri and Silver Coin occurrences.
In November 2018, an updated mineral resource was reported for the Big Missouri deposit was reported at 539,000 tonnes indicated grading 8.19 grams per tonne gold and 20.5 grams per tonne silver with an additional 2,250,000 tonnes inferred grading 8.25 grams per tonne gold and 18.4 grams per tonne silver, using a 3.5 grams per tonne gold equivalent cut-off (Rennie, D.W. (2019-01-17): Technical Report on the Premier Project).
In 2019, Ascot Resources Ltd. completed a program of infill diamond drilling comprising 156 diamond drill holes, totalling 25 871.63 metres, and induced polarization surveys on the area as part of the Premier Gold project. Later that year, an updated mineral resource was reported for the Big Missouri occurrence of 1 116 000 tonnes indicated grading 8.36 grams per tonne gold and 16.90 grams per tonne silver with an additional 1 897 000 tonnes inferred grading 8.34 grams per tonne gold and 14.70 grams per tonne silver using a 3.5 grams per tonne gold equivalent cut-off grade (Bird, S.C., Meintjes, T. [2020-02-28]: Resource Estimate Update for the Premier Gold Project, Stewart, British Columbia, Canada).