Occurrence Details


Occurrence Number:
115J 100
Occurrence Name:
Shadow
Occurrence Type:
Hard-rock
Status:
Anomaly
Date printed:
4/29/2025 3:11:50 AM

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General Information
Capsule
Work History
Assessment Reports
References

General Information

Secondary Commodities: gold
Deposit Type(s): Porphyry-related Au
Location(s): 62°19'55" N - -138°8'41" W
NTS Mapsheet(s): 115J08
Location Comments: 1 Kilometres
Hand Samples Available: No
Last Reviewed:

Capsule

Work History

Staked as Shadow cl (YA92672) in Jul/85 by Kerr Addison, which conducted mapping and geochem surveys later in the year, added additional claims in Jul/86 and performed geological mapping and prospecting later that year and in 1988.

Since 1988, soil sampling has been completed over the Shadow occurrence in 2010 and 2016.

Capsule Geology

The occurrences lies within a large, northwest trending rhyolite dyke swarm intruding andesite and volcanicsand a Mesozoic granodiorite body. The area around the occurrence to the south, southeast and west, is comprised of Cretaceous dacite volcanics. Further outside, a larger Jurassic age granodiorite body occurs to the west, southwest and south. Upper Cretaceous basalts overlie all units. Intensely silicified breccia and porphyry dykes occur along a major north-trending lineament.

The breccia varies from moderately to intensely silicified rhyolite porphyry fragments in a siliceous matrix. Some hematitic alteration was also noted. In more strongly silicified breccia, fragments are coated by cryptocrystalline, chalcedonic and radiating, drusy quartz. Later stage quartz and chalcedony veinlets cut the breccia. A clay-sericite Shadow Zone alteration zone with quartz stringers surrounds the Shadow Zone. West and north of Shadow, three other altered zones occur. Brecciation, quartz veining and/or silicification occur in areas up to l00m long and 15m vide. One zone is surrounded by a 130m wide area of moderate clay alteration, weak sericite and quartz stringers. 

Gold results are weak however values of 303 ppm As, 13.1 ppm Sb and 370 ppb Hg were encountered. 

Work History

Date Work Type Comment
12/31/1988 Geochemistry
12/31/1988 Ground Geophysics VLF-EM 16 survey.
12/31/1986 Geochemistry
12/31/1986 Geology 1:50 000 scale.
12/31/1986 Geochemistry
12/31/1986 Geochemistry
12/31/1985 Geochemistry
12/31/1985 Geology 1:50 000 scale.
12/31/1985 Geochemistry
12/31/1985 Geochemistry
12/13/2016 Geochemistry
12/13/2016 Geochemistry
12/13/2010 Geochemistry

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
096947 2016 Assessment Report Describing Geochemical Sampling Soil - Geochemistry
096122 2010 Beringia Gold Corporation-Mineral Exploration Summary-Hay Project Soil - Geochemistry
092574 1988 Assessment Report-Shadow Claims 1-24-1988 Soil and VLF Surveys Soil - Geochemistry, EM - Ground Geophysics
091865 1986 Assessment and in House Report-Geological and Geochemical Report on the Shadow 1-24 Claims Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Detailed Bedrock Mapping - Geology

Related References

Number Title Page(s) Reference Type Document Type
ARMC006908 Geology map - Shadow M.C. Property File Collection Geoscience Map (Geological - Bedrock)
ARMC004708 Field notebook on Shadow claims VLF Property File Collection Miscellaneous Company Documents
ARMC004709 Field notebook on Shadow claims soil samples Property File Collection Miscellaneous Company Documents
ARMC004710 Sketch map on Shadow zone and Creek zone Property File Collection Geoscience Map (General)
ARMC004711 Field data on Shadow claims - Target 21 Property File Collection Miscellaneous Company Documents
ARMC010038 Shadow map - Contoured total field magnetics Property File Collection Geophysical Map
ARMC016552 Photo interpretation map - 115J/8 - Apex Mountain Property File Collection Geoscience Map (General)
ARMC016551 Geochemical map - 115J/8 - Apex Mountain Property File Collection Geochemical Map
ARMC016550 Geology map - 115J/8 - Apex Mountain Property File Collection Geoscience Map (Geological - Bedrock)
ARMC016553 Coloured geology map with notations - 115J/8 - Apex Mountain Property File Collection Geoscience Map (Geological - Bedrock)