Slide 1: Unlocking District-Scale Potential
Eskay Mining Unlocking District-Scale Potential Dr. John DeDecker VP of Exploration
Slide 2: Disclaimer
Disclaimer The data contained herein is provided for information purposes only. Certain information has been compiled from sources believed to be reliable. No information in this presentation is to be construed as an offer to buy or sell securities. Some statements contained in this presentation are
Slide 3: Eskay Mining Property
Eskay Mining Property § In the heart of the Golden Triangle § SIB-Lulu § Likely continuation of world-class Eskay Creek VMS system § TV-Jeff § A trend of Au-Ag enriched VMS systems on the east limb of the Eskay anticline § Corey showings (C10, GFJ, Red Lightning, Tet, Spearhead, HSOV, Big Red, Sweet
Slide 4: Overview of Research
Overview of Research Mercier-Langevin et al. (2011) § Eskay Creek is a world-class high-grade intermediate tonnage VMS deposit § Is there a second Eskay Creek? § Application of lithogeochemistry to existing bulk rock compositional dataset § Utilization of VMS-related alteration as a vector § Leapfro
Slide 5: Volcanogenic Massive Sulfide Deposits
0RGHO Volcanogenic Massive Sulfide Deposits § Occur in clusters along syn- volcanic extensional structures § Convection of seawater over igneous intrusion § Convecting seawater interacts with volcanic rock package and leaches metals § Upflow zone above pluton with sulfide stringers and intense hydro
Slide 6: Volcanogenic Massive Sulfide Deposits
Volcanogenic Massive Sulfide Deposits § Occur in clusters along syn-volcanic extensional structures § Numerous examples of old and actively-forming VMS systems 7ZR LQWHUVHFWLQJ IDXOWVFRQWURO WKHORFDWLRQRI I O L G IHOVLFGRPHV DQGPDVVLYH 0RQHFNHHWDO VXOILGHGHSRVLWV 6HWWLQJRIWKH$UFKHDQ FD0D 0LOOHQEDF
Slide 7: VMS Deposits: Sub-seafloor Replacement and Stacked Deposits
Volcanogenic Massive Sulfide Deposits Sub-seafloor Replacement and Stacked Deposits § The largest VMS deposits are formed by subseafloor replacement § Diffuse hydrothermal fluid flow through volcanic or sulfide chimney debris pile effectively “filters” metals out of solution § Preferable to “exhalat
Slide 8: Stacked VMS Deposits: Noranda Camp
Volcanogenic Massive Sulfide Deposits Stacked VMS Deposits: Noranda Camp
Slide 9: VMS Deposits: Quantifying Alteration
Volcanogenic Massive Sulfide &KORULWH&DUERQDWH3\ULWH$OWHUDWLRQ,QGH[ Deposits: Quantifying Alteration )H20J2 § Quantifying VMS alteration has been well-described &&3, )H20J21D 2. 2 *LINLQVHWDO by Large et al. (2001) ,QWHQVLW\ $, &&3, 6XEWOH § Alteration index (AI) :HDN § AI=100(K2O+MgO)/(K2O+MgO+Na2O
Slide 10: BLEG Sampling
BLEG Sampling § Bulk Leach Extractable Gold § Sampling of clay fraction from stream sediments § Analyze for Au adsorbed onto clay minerals § Also analyze for trace elements correlated with Au Scarlet Ridge Scarlet Ridge § C10, Vermillion, and Red Lightning area has several very strong Au anomalies §
Slide 11: Moving beyond the Contact Mudstone
Moving beyond the Contact Mudstone § Eskay Creek hosts the newly-discovered stratiform mineralization hosted by the Lower Mudstone and Even Lower Mudstone (ELM) zones § These strata continue onto Eskay Mining Corp claims § Additional stratiform mineralized zones have been identified by Eskay Mining
Slide 12: Proposed Sequence of Tectonic Events at SIB
Proposed Sequence of Tectonic Events at SIB § 1) Arc volcanism related to subduction (Betty Creek Fm. Unuk River andesite) § 2) Slab rollback induces back-arc rifting and formation of submarine basin (e.g. the dacite units in the Betty Creek Fm. and the rhyolite flows in the Spatsizi Fm.) § 3) Incep
Slide 13: Cumberland: Contact Mudstone-hosted Mineralization
Cumberland: Contact Mudstone-hosted Mineralization § On west limb of Eskay 1.93 g/t Au, 48.7 g/t Ag anticline § Historic Au intercepts at Contact Mudstone horizon 0.11 g/t Au, 10.9 g/t Ag § Au grades up to 10.97 g/t § Portion of known deposit eroded into Sulphurets Creek 5.64 g/t Au, >100g/t g/t Ag
Slide 14: Lulu Zone: Eskay Rhyolite-hosted Mineralization
Lulu Zone: Eskay Rhyolite-hosted A Mrg+Stb Mineralization A § Au and Ag is associated with 1cm 67.63-67.8 m stratiform mudstone horizons 39.6-39.8 m 1cm B Py § Highest-grade intercepts (up to B 85 g/t Au) are within massive and semi-massive sulfosalt-sulfide 1cm 89.3-89.5 m bodies hosted by peperiti
Slide 15: SIB: Spatsizi Formation-hosted Mineralization EK18-160
SIB: Spatsizi Formation-hosted Mineralization EK18-160 § Hosted by Spatsizi Fm. peperitic rhyolite § 61.9 g/t from 203.1-204.1 m § Primary volcaniclastic pyrite, apatite, and rutile § Volcaniclastic pyrite replaced by hydrothermal arsenian pyrite § Further investigations needed to identify Au host 1
Slide 16: TV and Jeff Showings: Betty Creek Fm.-hosted Mineralization
TV and Jeff Showings: Betty Creek Fm.-hosted Mineralization § Mineralization hosted by dacitic and basaltic peperite and breccia in Betty Creek Fm. § Mineralization outcrops on surface § Trend of stacked sulfide bodies on the East limb of the Eskay anticline § SkyTEM survey shows conductivity anomal
Slide 17: The TV-Jeff VMS System
The TV-Jeff VMS System TV Orthographic projection TV21-81 intercepted a potential TV21-81 looking down-dip VMS feeder structure, as suggested by the presence of stockwork sulfide TV mineralization, hydrothermal alteration, Upper Massive Stratigraphic Correlation and a gabbro dike Sulfide Horizon of
Slide 18: TV: Betty Creek Fm.-hosted Mineralization
TV : Betty Creek Fm.-hosted Mineralization § Mineralization hosted by dacite and basalt peperite and breccia in Betty Creek Fm. § Stratigraphy and attitude of contacts are consistent with location on eastern limb of Eskay anticline § Stratigraphy and geophysical anomalies in undrilled ground suggest
Slide 19: TV: Lower Massive Sulfide Zone
TV : Lower Massive Sulfide Zone 5.46 g/t Au, 182 g/t Ag § Mineralization is semi-massive to massive TV21-69 123.69-132.72 § Pyrite, pyrrhotite, and sphalerite are dominant sulfide minerals § Au- and Ag-bearing § Hosted by intensely hydrothermally altered mudstone TV20-35 196.09-196.27 m § Associated
Slide 20: TV: Stringer-style Mineralization
TV : Stringer-style TV21-54 279.10-283.29 Mineralization § Broad zone of stringer-style mineralization overlies Lower Massive Sulfide Zone § Abundant sulfide and Ag mineral mineralization TV21-63 10.87-15.23 m § Intensely silicified TV21-71 27.36-27.44 m TV21-63 27.53-35.84 m Carbonaceous mudstone P
Slide 21: TV: Upper Massive Sulfide Zone
TV21-78 38.0 m TV: Upper Massive Sulfide Zone § First intercepted by TV21-78 that targeted the predicted location of an Upper Massive Sulfide Zone § Approximately 9 m of massive and semi-massive sulfide mineralization replacement-style sulfide mineral § Pyrite clasts with replacement-style sphalerit
Slide 22: TV: Northward Extension of Sulfide Mineralization
TV: Northward Extension of Sulfide TV21-81 ~308.0 m Mineralization § TV21-81 intercepted intense stringer-style sulfide mineralization from 242-328 m § 300 m north of Jeff dacite breccia known replacement-style mineralization at TV sulfide minerals § Hosted by dacite breccia § Targeted using SkyTEM
Slide 23: Jeff
Jeff § Stockwork-style mineralization § High-grade domains within a Tet broad zone of 0.1-0.5 g/t Au Elc mineralization Elc Pyg Pyg § Associated with moderate to Sil intense hydrothermal alteration Pyr § Stratigraphically lower than TV J21-46 § Brucejack-like mineralization 118.39-118.47 m § Preciou
Slide 24: Jeff
Jeff § Mineralized dacitic and basaltic peperite in drill core J20-39 62.52-62.69 m 2.14 g/t Au, 70 g/t Ag J20-38 36.88-37.14 m J20-39 82.8-83.0 m 0.351 g/t Au, 37.6 g/t Ag 0.163 g/t Au, 14 g/t Ag J20-33 59.97-60.58 m 79.2 g/t Au, 203 g/t Ag
Slide 25: Vermillion-C10 Region
Vermillion-C10 Region Scarlet Ridge Scarlet Ridge
Slide 26: Vermillion-C10 Region
Vermillion-C10 Region § 2021 drilling identified likely west- dipping thrust fault at C10 § Geophysics and field investigations identified sinistral strike-slip fault § Interpreted as reactivated syn- volcanic feeder structure Lower Hazelton Group Upper Hazelton Group
Slide 27: C10: Lithology and Mineralization
C10: Lithology and Mineralization § Hanging Wall: dacite-hosted sulfide mineralization intercepted by several holes including C21-4 53 m south of 99.4 g/t in CR05-17 § Likely stratigraphically correlated with Jeff § Footwall: Willow Ridge basalt-Eskay rhyolite contact under glacial till at 204.20 m
Slide 28: Vermillion
Vermillion V21-1 ~158.0 m sheared dacite breccia sphalerite § 2.1 km east of C10 sphalerite § Massive sulfide discovered in outcrop arsenopyrite + § Drilling intercepted long Ag-sulfosalts+ pyrite intervals of dacite-hosted V21-1 ~193.0 m chalcopyrite galena pyrite, sphalerite, chalcopyrite, and pyr
Slide 29: Spearhead
Spearhead § Outcropping semi- massive sulfide mineralization § Hosted by mudstone associated with rhyolite § 1.3 km NE of Vermillion § Historic surface samples graded up to 4.1 g/t Au CR05-17 146.11-146.31 § Along the same sinistral structure as Vermillion and Red Lightning 1.0 mm
Slide 30: Scarlet Ridge
Scarlet Ridge § Cluster of very strong BLEG anomalies in the NE part of property § Scarlet Ridge is associated with extensive outcrops of peperitic rhyolite-hosted sulfide mineralization Scarlet Ridge Scarlet Ridge § On east limb of Eastern anticline § Strong BLEG anomalies continue to NE on flanks
Slide 31: Prospects Identified by BLEG: Scarlet Ridge
Prospects Identified by BLEG: Scarlet Ridge Rhyolite § Nose and east limb of Eastern anticline § Numerous sulfide-bearing gossans hosted Interbedded mudstone and sandstone by a peperitic rhyolite sill complex § Gossanous bluff extends along strike 1.5 km § Trend of Au-enriched historic surface sampl
Slide 32: Scarlet Ridge: VMS Feeder Mineralization on the Surface
replacement-style gossanous Scarlet Ridge: VMS Feeder Mineralization sulfide minerals rhyolite on the Surface pyrite rhyolite breccia stringers gossanous rhyolite pyrite stringers
Slide 33: Questions?
Questions? Website: https://eskaymining.com Email: info@eskaymining.com § Acknowledgements: § Colorado School of Mines: § Thomas Monecke, Katharina Pfaff, Nigel Kelly § The 2020 and 2021 Geology team § Neil Prowse, Rachel Kim, Andy Mitchell, and all the geos and geotechs § Driftwood Drilling § ITL D