RC GOLD PROJECT
The RC Gold Project, comprised of the RC Gold, Mahtin, Clear Creek and Barney Ridge properties, is a district scale land package of 1,891 claims covering approximately 376 square kilometres (37,600 hectares or 92,900 acres) within the geologically fertile and highly prospective Tombstone Gold Belt region (Figures 1 & 2). The target at the RC Gold Project is an intrusion-related gold deposit similar to other intrusion-related gold deposits that exist throughout the Tombstone Gold Belt such as Victoria Gold’s Eagle Deposit (3.6 million ounces Au) (1), Golden Predators’ Brewery Creek Deposits (1.5 million ounces gold) (2) and AM Gold’s Red Mountain Deposit (1.95 million ounces gold)(3). Numerous placer gold deposits also exist throughout this gold-rich belt. The Tombstone Gold Belt is located within the larger Tintina Gold Belt which also hosts Kinross Golds’ Fort Knox deposit in Alaska (3 million ounces of gold) (4) (Figure 1).
Figure 1 - RC Gold Project Regional Location Map
The RC Gold Project is situated about 100 km east of Dawson City, Yukon at the headwaters of Clear Creek and Big Creek, a major placer mining district that is serviced by a network of gravel roads and trails. A new, well maintained placer mine access road traverses through the south side of the claim block and provides great access across the Property (Figure 2). This road connects to the Clear Creek road which connects to the Klondike Highway, approximately mid-way between Stewart Crossing and Dawson (Figure 1). The claim block is strategically located within the heart of the Tombstone Gold Belt and is surrounded by junior mining companies, including a common boundary with Victoria Gold (Figure 2).
Figure 2 - RC Gold Project Claim Blocks
Placer Mining first began on Clear Creek in the late 1800's and the first quartz claims were staked in the early 1900's. Placer mining has continued to the present, with a dredge operating on Clear Creek from 1943 to 1954 and again between 1981 and 1987. Several active placer mines continue to operate in the Clear Creek drainage and new placer mining activity has recently begun in Big Creek.
The first modern hard rock exploration in the area took place in the 1970's, targeting silver, tin and tungsten, metals commonly associated with Intrusion Related Gold deposits. High grade gold-silver and silver-lead-zinc veins have also been prospected.
In the 1990's, exploration shifted to bulk tonnage gold after the discovery of the Fort Knox gold deposit in Alaska, in a similar geological environment. Explorers in and around the vicinity of the RC Gold Project included Noranda, Ivanhoe Goldfields, Kennecott and Newmont. These companies carried out geological mapping, geochemical and geophysical surveys and several campaigns of drilling. More recently, in the 2000s, Thor Exploration, StrataGold, Golden Predator, Pacific Ridge and Kestral Gold have explored on the west side of the RC Project, while Ryan Gold (now StrikePoint) explored to the east. AM Gold’s Red Mountain Property, an intrusion-related gold target that is adjacent to the the Project's northern border, has also seen exploration throughout the 2000’s and has a resource of 1.95 million of gold ounces defined.
RC Gold Property (RC, BEE & BOP Claims)
In 2017, the RC Gold Property was optioned to Pacific Ridge Exploration Ltd. who completed a program of geological mapping and property-wide soil sampling that same year. Pacific Ridge conducted additional soil sampling, mapping and a small geophysical survey in 2018. These work programs produced encouraging results with several previously unknown gold-in-soil anomalies shown to be present on the Property. In 2019, after acquiring the Property, Sitka Gold followed up on these results with a soil sampling and geophysical survey program designed to expand and fill in the previous geophysical and geochemical anomalous zones that had been identified. Together, this work has defined several high-priority gold targets where the gold values, plus the associated pathfinder metals, are typical of mineralization associated with Intrusion Related Gold deposits. Two of these mineralized zones appear to be contiguous representing an Intrusion Related Gold target that is 2 km long by 0.5 km wide (see Figure 3). In 2020 Sitka completed 2 helicopter supported drill holes in the Big Creek and Far Grid targets and also flew a LiDAR survey across the western half of the Property.
Figure 3 - Gold in Soil Anomalies
The area of the RC Gold property is underlain by phyllite, quartzite, calc-phyllite, calc-silicate, grit and marble of the Proterozoic to Early Cambrian Hyland Group. These metasedimentary rocks are imbricated by thrust faults of Jurassic and Early Cretaceous age. The Clear Creek area is in the hanging wall of the Robert Service Thrust.
At the headwaters of Clear Creek, six Tombstone-style intrusions with ages of approximately 92 my, include the Saddle, Eiger, Pukelman, Rhosgobel, Josephine and Big Creek stocks. They have surface exposures ranging from 0.2 to 3.5 km2. The Saddle, Pukelman and Rhosgobel stocks are composed of medium- to coarse-grained quartz monzonite The Josephine and Big Creek stocks are composed of fine- to medium-grained, equigranular granodiorite. The Eiger stock is composed of fine to medium-grained, equigranular diorite with rare mafic phenocrysts.
Contact metamorphism of the Hyland Group country rocks extends for as much as 0.5 km around the stocks and typically occurs as resistant, rusty weathering biotite hornfels.
The RC Gold property lies within the heart of the Tintina Gold Belt. Hart (2005) has estimated a total metal endowment on the order of 70 million ounces of gold. Key deposits include Brewery Creek and the Eagle deposit (Dublin Gulch) in Yukon and Fort Knox, True North, Pogo and Donlin Creek in Alaska. Most of these deposits are characterized by flanking placer gold creeks.
The immediate area of the RC Gold property is characterized by several styles of mineralization associated with the Tombstone-aged intrusions, but the most important of these is sheeted veins, stockworks and breccias that occur within the intrusions and adjacent hornfels. These veins typically contain minor amounts of sulphide, including arsenopyrite, pyrite and rarely pyrrhotite. Other minerals include scheelite (tungsten), molybdenite, galena, chalcopyrite and bismuthinite. Arsenic, bismuth, tellurium, antimony, tungsten and molybdenum are typical pathfinder elements when prospecting for gold in these types of systems.
MAHTIN GOLD PROPERTY
The Bos Stock intrudes into sedimentary rocks of the Hyland Group, covering an area of 3.5 km by 3.0 km. Work by Ryan Gold shows a significant soil anomaly covering the area. Advanced geological maps have been completed for the May-Qu block. Grab samples have returned up to 3.37 g/t Au over the intrusion, and 313 g/t Ag in the distal vein systems. Next step would be drilling to assess extent and mineralization of pluton below sedimentary cap.
CLEAR CREEK PROPERTY
The Clear Creek Property has had intermittent exploration conducted since 1981. Previous work on the Property has outlined several highly anomalous and extensive gold in soil trends on the margins of four intrusions. These anomalies all show strong correlations with bismuth, arsenic, tungsten and silver; similar to geochemical signatures seen at Victoria Gold’s Eagle Gold Project (Dublin Gulch) and Kinross’s Fort Knox. Historical rock samples from the Property have returned values from less that 5 ppb up to 319.5 g/t gold (Huber, 2018). Many of the high grade samples collected on the property are from sheeted quartz veins and quartz arsenopyrite veins often found within or on the margins of the intrusions. Additionally, significant gold grades of up to 25.1 g/t gold have been returned from metasediments with disseminations and weak stockworks of pyrite and arsenopyrite. Several significant intervals have also been recorded from the limited drilling and trenching work completed on the Property returning less than 5 ppb up to 2.11 g/t gold over 25 metres from a trench and 0.65 g/t gold over 88 meters (bottoming in 3.0 metres grading 1.296 g/t gold) from RC drilling (Huber, 2018).
BARNEY RIDGE PROPERTY
Previous work on the Barney Ridge property has identified 3 distinct gold-silver bearing zones, the Clover, Leprechaun and Lucky Charm zones, all of which remain open for expansion on surface and particularly to depth, as well as a large area of untested prospective ground located between the Lucky Charm and Clover zones. The Lucky Charm zone soil sample survey outlined a zone 600 m long and 125 m wide with gold values greater than 30 ppb Au and up to 141 ppb Au and rock samples from a trenching program in 2011 returned gold assays as high as 7.72 g/t Au over 0.8m and grab samples up to 7.61 g/t Au. (Schulze, 2012). Soil surveys on the Leprechaun zone outlined an area of 1200m x 400m with greater than 30ppb Au (Schulze, 2012). Soil samples from the Clover zone returned values as high as 212 ppb Au and rock samples as high as 2.11g/t Au. In 2016 additional limited rock and soil sampling was completed on the property with 28 rock grab samples returning values from less than 5 ppb up to 4.05 g/t Au from epithermal style alteration found adjacent to north margins of the Barney stock.
Geology and Mineralization
The area of the Barney Ridge Gold property is underlain by a large unit of Hyland Group metasedimentary rocks comprising quartz-feldspathic psammite (metamorphosed sandstone), micaceous psammite and muscovite-chlorite phyllite. Other lithologies include gritty or pebbly psammite, meta-pebble conglomerate, marble and calc-silicate rocks. These metasedimentary rocks are imbricated by thrust faults of Jurassic and Early Cretaceous age. The Clear Creek area is in the hanging wall of the Robert Service Thrust (Schultz, 2012).
Intrusive rocks on the property include stocks, small plugs, sills and dykes which range in composition from granite to diorite. These are part of the mid-Cretaceous Tombstone Plutonic Suite which is commonly associated with gold mineralization in the Tombstone Gold Belt. One such intrusion, the Barney Stock, occurs on the western portion of the property. Zones of massive quartz-biotite hornfels and rare calc-silicate skarn as well as auriferous quartz-sulphide veins are often associated with Tombstone Suite stocks. Additionally, zones of variably mineralized, hydrothermal breccias are spatially and possibly temporally related to these intrusive rocks (Huber, 2020). Gold mineralization is often associated with bismuth and arsenic mineralization.