Occurrence Details


Occurrence Number:
116B 012
Occurrence Name:
Midnight Dome
Occurrence Type:
Hard-rock
Status:
Prospect
Date printed:
4/29/2025 10:23:09 PM

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General Information
Capsule
Work History
Assessment Reports

General Information

Secondary Commodities: asbestos
Aliases: An Las, Asbestos, Asbestos King, General Custer, Star
Deposit Type(s): Ultramafic-hosted asbestos
Location(s): 64°4'4" N - -139°24'32" W
NTS Mapsheet(s): 116B03
Location Comments: .5 Kilometres
Hand Samples Available: No
Last Reviewed:

Capsule

Work History

Staked as Rose cl (526) in Apr/1901, General Custer cl (1935) in Jun/1901 and as Asbestos cl (6326) in Oct/02 by A.R. Thompson. Restaked as AN LAS cl (6701) in Jun/03 by Lizzie Schmidt, who hand trenched in 1903-06 and surveyed in 1906. She sued YCGC in 1907 over alleged damage caused by a broken water line and lost the claims at a sheriff's sale in Mar/08, who sold them to E. Simpson in 1909.
Restaked as AN LAS cl (11979) in Aug/10 by S. Thurber, who restaked as Star cl (12586) in Jul/16 and explored with 47 m of drifting and 21 m of shaft sinking in 1917-23. J. Bruhalski tied on King cl (12595) to the south in Aug/16 and filed 43 m of drifting and two shafts (7.6 m and 8.5 m) between 1917 and 1931.
Restaked as Asbestos King, etc cl (57699) in Sep/51 by J. Adams and J. Babwik. Restaked as Ricky cl (78082) in Jun/56 by E. Martens and optioned by Yukon Cons Gold Corp, which cut 9 bulldozer trenches and drilled one hole (28.3 m) in 1957.
Restaked as Sun cl (Y37745) in May/69 by L. Brown. C. Ashley staked CYA cl (YA84474) 1.6 km to the east in Aug/84.

Capsule Geology

Chrysotile fibres up to 6 m long occur in widely spaced, erratic cross fibre and slip fibre veins in a serpentinite body that extends from the base of the landslide on the outskirts of Dawson City to the top of Midnight Dome. The serpentinite is medium green, partly sheared and has a characteristic 'cobweb' pattern of black lines (iron stains) on weathered surfaces. Most of the chrysotile occurs as spiky coatings on fracture surfaces and grades are generally very low. Two rock quarries have been operated at the base of the mountain to obtain fill used for dyke and road construction at Dawson City. Some of this material grades up to 1% chrysotile.

References

GREEN, L.H., 1990? The Gold Hustlers, p. 100-101.

YUKON MINING INDUSTRY 1941-59, p. 92, 112.

Work History

Date Work Type Comment
12/31/1957 Drilling Number of holes drilled: 1 Amount of work done: 28 METRES
12/31/1917 Other Amount of work done: 68 METRES Drifting and shaft sinking.
12/31/1906 Other Claim boundary survey.
12/31/1903 Trenching

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
096882 2015 2015 Assessment Report on Trenching and Prospecting on the Tr'ondek River Gold Project Prospecting - Other, Mechanical - Trenching