The Goldstorm prospect is underlain by Lower Jurassic andesitic volcanic rock Hazelton Group.

Gold mineralization at Goldstorm and Copper Belle (104B 518) is hosted primarily within andesitic tuffs and volcaniclastic rocks, with only limited sections of intrusive rocks observed. All rocks are altered to varying degrees, with typically abundant chlorite, as well as localized sericite, potassium feldspar and zones of silicification. Pyrite is abundant in the strongly mineralized areas, occurring as disseminations, veins and coarse masses, with local sparse specks of chalcopyrite. Quartz-carbonate veins are common and appear to post-date the pyritic groundmass; some contain fine pyrite and local chalcopyrite, galena and arsenopyrite. Minor visible gold has also been observed in the quartz-carbonate veins.

In 2016, a new zone, initially named CB North was intersected in the third hole of the drilling program (drill hole CB-16-03) and is located approximately 870 metres northeast of the Copper Belle zone. Impetus for drilling the hole was a magnetotelluric survey (MT survey) which was initiated earlier in the 2016 field season. Later news releases reported the zone as being only 550 metres from the Copper Belle drilling. The CB North area was thought to be continuous with the Copper Belle zone was explored as a continuation of the Copper Belle zone (104B 518) until early January 2019.

Complete assays for Goldstorm drill hole CB-16-03 yielded 0.526 gram per tonne gold over 629.7 metres, including 54 metres from 88 to 142 metres of 1.117 grams per tonne gold and 122 metres from 304 to 426 metres of 0.965 gram per tonne gold. The drill hole terminated at 717.7 metres in mineralization with the final 13.7 metres averaging 0.315 gram per tonne gold (Tudor Gold Corp. Press Release, October 26, 2016).

CB-17-24, a step-out hole drilled this year on the Goldstorm zone, intersected various mineralized zones where the most significant was 115.50 metres of continuous mineralization grading 1.31 grams per tonne gold from 60.50 to 176.00 metres depth, including a higher-grade intercept of 57 metres grading 1.97 grams per tonne gold from 111.5 to 168.5 metres (Tudor Gold Corp, News Release, December 14, 2017). A second interval occurs deeper in the hole, grading 0.83 gram per tonne over 60 metres, from 228.5 to 268.50 metres (Tudor Gold Corp, News Release, December 14, 2017). Hole CB-17-24 was collared above the ice 166 metres south of CB-16-03. A number of long mineralized intervals were obtained, such as hole CB-17-07, that over 369.0 metres averaged 0.686 grams per tonne gold, 2.4 grams per tonne silver and 0.03 per cent copper, including 43 metres of 1.81 grams per tonne gold. These broad intercepts were the first indication of a deep system at the Goldstorm Zone, located immediately to the northeast of Copper Belle. Mineralized areas appear to be elongate and trending north-northeast, with a moderately flat dip to the northwest and having a drilled thickness of over 400 metres in places.

In 2018, Tudor Gold drilling intersected extensive intervals of gold mineralization a number of the holes, such as hole CB-18-32 that averaged 0.662 gram per tonne gold over 337.8 metres, including 121.8 metres at a grade of 1.036 grams per tonne gold; hole CB-18-39 averaged 0.981 grams per tonne gold over 563.8 metres and ended in mineralization (https://tudor-gold.com/projects/). All 2018 holes were later reported to be part of the Goldstorm zone.

Tudor Gold stated the following in January 2019. "It was previously thought that gold mineralization identified by drilling northeast of the Copper Belle Zone was simply a northeast extension of that same zone, but after evaluating drill hole data from holes completed in 2016, 2017 and 2018, it appears that the mineralization encountered to the northeast of Copper Belle has different characteristics, configuration and geometry. While it is unclear whether the zones are genetically linked, these zones are physically separate (Tudor Gold, Press Release Jan.31,2019)." A surface drill hole location map in the aforementioned news release shows the location of the Copper Belle and Goldstorm zones.

Goldstorm is reported to be a much larger system than Copper Belle, it is at least 300 metres wide and extends vertically for over 700 metres. The zone has been traced for approximately 500 meters along a northeastern azimuth. Gold mineralization appears to be continuing towards the northeast and southeast and clearly becomes stronger in the northernmost hole, CB18-39 which yielded 563.8 meters grading 0.981 grams per tonne gold; the upper portion of CB18-39 averaged 1.141 grams per tonne gold over 280.5 meters and a lower zone in the same hole averaged 1.154 grams per tonne gold over 156 meters (Tudor Gold, Press Release Jan.31, 2019). This hole bottomed in mineralization.

In 2019, drilling extended the Goldstorm mineralized zone several hundred meters along strike to the northeast and significantly expanded the mineralized limits to the southeast, where one of the best near-surface intervals averaged 2.006 grams per tonne gold over 87 metres, within 336 metres averaging 1.004 grams per tonne gold in hole GS19-52 (Tudor Gold News Release, October 24, 2019). In September, 2019 drilling extended mineralization with an additional 150 metres step-out along strike intercepting the largest gold interval drilled to date; 1081.5 metres averaging 0.589 grams per tonne gold including an upper interval of 301 metres containing 0.828 grams per tonne gold (Tudor Gold, News Release, September 23, 2019). The Goldstorm Zone now extends more than 800 metres in strike length and remains open along strike to the Northeast and Southwest as well as to depth.

In 2020, step-out drill holes (GS-20-64 and -66) on the Goldstorm zone were successful in expanding the defined area of mineralization to 1100 metres long by up to 600 metres wide, yielding intercepts of up to 0.900 gram per tonne gold, 5.40 grams per tonne silver and 0.012 per cent copper over 550.5 metres in hole GS-20-64 (P&E Mining Consultants Inc. [2021-04-23]: Technical Report and Initial Mineral Resource Estimate of the Treaty Creek Gold Property, Skeena Mining Division, British Columbia, Canada). The Goldstorm zone has been divided into three distinct bodies, referred to as the 300 horizon, the CS-600 horizon and the DS-5 horizon, defined by mineral and sulphide assemblages, mineralization type and occurrence, veining and alteration. The three horizons composing the occurrence are tabular bodies dipping 45 to 50 degrees to the northwest. A complete description of each horizon and 2020 drilling results can be found in the SEDAR report “P&E Mining Consultants Inc. (2021-04-23): Technical Report and Initial Mineral Resource Estimate of the Treaty Creek Gold Property, Skeena Mining Division, British Columbia, Canada”.

Worky History

In 2016, Tudor completed a magnetotelluric survey that covered favorable areas identified by previous drilling and geophysical programs, and followed up with a 3,765-metre eight-hole drill program.

In 2017, Tudor carried out a 27-hole, 13,722 metres diamond drill program. The target was the Copper Belle zone which, previous to January 2019, included the Goldstorm.

In 2018, drilling continued in the Goldstorm Zone with the intent of exploring possible extensions of the mineralized area to the north of, and west of, previous drill holes. Nine holes, totalling 7,238 meters, were drilled in 2018 in this new target area that covers approximately 500 metres by 450 metres.

In 2019, the drill program at the Goldstorm Zone by Tudor Gold totalled 9,781.8 meters within 14 diamond drill holes. ]

The surface drill hole location map found in the January 2019 Tudor Gold news release shows the location of the Copper Belle and Goldstorm zones (Tudor Gold, Press Release Jan.31,2019). This location map indicates that all drill holes west and southwest of drill hole CB-17-30 are on the Copper Belle zone and those north and northeast of it are on the Goldstorm zone. Holes on the Copper Belle are primarily 2009 and 2017 holes and those on the Goldstorm are primarily 2017 and 2018 holes. One 2016 hole is on the Goldstorm zone and 2 are on the Copper Belle. All 2018 holes appear to be on the Goldstorm zone and none on the Copper Belle. No 2019 drill holes were plotted on the location map.

In 2020, Tudor Gold Corp. completed a program of diamond drilling on the Goldstorm and Perfect Storm zones of the Treaty Creek Gold property. Fourty-nine diamond drill holes, totalling 43 880 metres, were completed on the Goldstorm zone. A mineral resource estimate was reported for the Copper Belle (MINFILE 104B 518) and Goldstorm occurrences with a total openpit and out-of-pit measured and indicated resource of 815 700 000 tonnes grading 0.66 gram per tonne gold, 3.6 grams per tonne silver and 0.06 per cent copper with an additional inferred resource of 311 700 000 tonnes grading 0.72 gram per tonne gold, 4.0 grams per tonne silver and 0.05 per cent copper using a 0.30 and 0.46 per cent copper equivalent for in-pit and out-of-pit resources, respectively (P&E Mining Consultants Inc. [2021-04-23]: Technical Report and Initial Mineral Resource Estimate of the Treaty Creek Gold Property, Skeena Mining Division, British Columbia, Canada).

See Copper Belle (104B 518) for further details and related mineralization.