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Occurrence Details


Occurrence Number
105H 016
Occurrence Name
Tuchitua
Occurrence Type
Hard-rock
Status
Deposit


General Information

Secondary Commodities: chrysotile, copper, gold, zinc, lead, silver, jade/nephrite
Deposit Type(s): Ultramafic Mafic Jade (Nephrite)
Location(s): 61.281390 N, -129.786110 W
NTS Mapsheet(s): 105H05
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

The northwest end was staked as Porkpine cl 1-8 (74010) and EKO cl 1-8 (74018) in Oct/58 by J. Smarch and E. Hammer. The entire property was restaked as Gen 1-24 (74490) in Oct/59 by G. Rapson, E. Brodhagen and N. Zinchuk and examined by Cassiar Asbestos Corp Ltd later in the year. In 1960, the Dim cl 1-4 (75122) were added by B. Countryman and the property was optioned to Wescan Development Ltd, which hand trenched and drilled 19 x-ray holes (147 m).
Later staking includes Patsy cl (88723) in Jul/64 by H.C. Fromme at the southeast end; Sowden cl 11, 13 and 15 (Y42501) in Jul/70 by K. Ebner, who bulldozer trenched at the northwest end in 1971; and Green Stuff cl 1-6 (Y94476) in May/76 by G. Bouchard at the northwest end. The Green Stuff claims were optioned by Arctic Jade Ltd, which performed more trenching in 1977.
The entire property was restaked as Hiralph cl 1-8 (YA34742) in Aug/78 and Tisnot cl 1-16 (YA45097) in Aug/79 by Teslin Joint Venture (Cassiar Asbestos Corporation Ltd, Cominco Ltd and Exploram Minerals Ltd), which explored with mapping, sampling and a magnetic survey in 1979. The northwest end was restaked in Jul/85 as Sue cl 1-2 (YA73514) by G. Sckopke.
H. Caesar staked Beaver cl 1-8 (YB15344) 5 km to the east in Aug/88, and added Otter cl 1-6 (YB33628), Owl cl 1-4 (YB33642), Mudhen cl 1-8 (YB33530) and Pika cl 1-4 (YB33225) between July and September, 1990. In Apr/96 Caesar restaked Mudhen claims as Mudhen cl 1-4 (YB59283).
Between Sept and Nov/95 Westmin Resources Ltd. staked Hang cl 1-453 (YB69525) 5 km to the north and carried out airborne geophysical surveying later that year. The occurrence was restaked by Westmin as Tack cl 1-557 (YB78704) in Mar/96. The company then completed regional reconnaissance of the Hang and Tack claims by carrying out prospecting and geological mapping traverses across stratigraphy and soil, silt and rock sampling along claim lines. In 1997, Westmin carried out geological mapping (1:10 000) and geochemical sampling (rock, silt and soil) on the southern Tack claims.

Capsule Geology

Chrysotile veinlets up to 9 mm long occur in two showings at either end of a 3 km long serpentinite sill intruded between metavolcanics and argillite of Devonian-Mississippian age. Magnetic response suggests that the sill is continuous under overburden between the two showings.
The northwest showing also contains numerous jade boulders derived from alteration zones at the margins of rodingite dykes. Several tonnes of jade were shipped from the property between 1977 and 1979.
The Tuchitua Project, a regional reconnaissance program encompassing a large area surrounding the original occurrence was undertaken by Westmin in 1995 and focused on the volcanogenic massive sulfide potential of this portion of the Finlayson Lake belt. The Finlayson Lake belt is a layered sequence of mid Paleozoic, metamorphosed and deformed sedimentary and volcanic rocks of the Yukon-Tanana Terrane which host numerous massive sulfide occurrences, including the Wolverine and Kudz Ze Kayah deposits (Minfile Occurrence #105G 072 and #105G 117, respectively). Remapping of the area directly to the northwest, by the Yukon Geology Program (Murphy and Piercey, 1999) indicates that the area is underlain by Pennsylvanian to Permian rocks of the Campbell Range Succession which overly and are part of the Yukon-Tanana Terrane.
A number of scattered polymettalic base metal soil anomalies were detected in the north-central portion of the Tack claims and several Ag and Au spot highs were detected in the northeastern portion of the Hang claims. Specifically, two Ag anomalies up to 12 ppm Ag occur on the northern portion of the Hang claims. A single sample from the southeastern Hang claims returned a value of 50 ppb Au and one sample from the northern Tack claims ran 180 ppb Au. An area of anomalous Cu values occurs in the central portion of the northern Tack claims were values range up to 181 ppm Cu. To the southeast scattered high Cu values range up to 195 ppm Cu. Pb concentration in soil ranges up to 66 ppm, with most of the higher values concentrated in the north central portion of the Tack claims. Similarly, the highest Zn value, 350 ppm Zn, is located in the north central portion of the Tack claims.
Apart from a Zn soil anomaly (peak value of 1 125 ppm) on the southern Tack claims, only a couple of spot highs for Au (125 and 90 ppb) and an isolated Pb anomaly (1 600 ppm) were detected during the 1997 program. Geological mapping carried out in 1996 and 1997 led Westmin to concluded that the prospective stratigraphy hosting the Wolverine deposit does not extend onto the Tack claims and based on the lack of any siginificant alteration or mineralization detected on the property all of the claims have subsequetly been allowed to lapse.

References

G. BOUGHARD AND R. SNOWDEN, Apr/77. Assessment Report #090187 by B. Price.

MINERAL INDUSTRY REPORT 1979, p. 209.

MURPHY, D.C. AND PIERCEY, S.J., 1999. Geological map of parts of Finlayson Lake and Frances Lake map areas, southeastern Yukon. Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-4.

TESLIN JOINT VENTURE, Feb/80. Assessment Report #090578 by R.J. Cathro.

WESCAN DEVELOPMENTS LTD, Dec/60. Assessment Report #091172 by P.R. Oluk.

WESTMIN RESOURCES LTD, Mar/97. Assessment Report #093622 by D.A. Terry et al.

WESTMIN RESOURCES LTD, Mar/98. Assessment Report #093799 by D.A. Terry et al.

YUKON GEOLOGY AND EXPLORATION 1979-80, p. 185.

Location Map

Last Updated: Jul 5, 2018

Work History

Year Work Type Comment
1997 Geochemistry: Soil Contour soil sampling, silt and rock samples were collected.
1997 Geology: Bedrock Mapping
1996 Geochemistry: Soil Also silt sampling.
1996 Geology: Bedrock Mapping
1996 Other: Prospecting
1995 Airborne Geophysics: Electromagnetic Also magnetics.
1979 Geochemistry: Rock
1979 Geology: Bedrock Mapping
1979 Ground Geophysics: Magnetics
1977 Lab Work/Physical Studies: Bulk Sample Several tons of nephrite jade shipped from 1977 to 1979.
1977 Trenching
1971 Trenching: Mechanical
1960 Drilling: Diamond Nineteen holes, 146.9 m. X-ray holes.
1960 Trenching: Hand

Regional Geology - Terrane

Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian


Regional Geology - Bedrock

Supergroup:
Group/Suite: Slide Mountain
Formation:
Member:
Terrane: Slide Mountain
Period Max: Carboniferous
Age Max: 359 MA
Period Min: Permian
Age Min: 260 MA
Rock Major: serpentinite
Rock Minor:
Reference: Murphy (2000) - YGS OF 2000-17
Geological Unit (1M): CPSM
Geological Unit (250K): CPSM4

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
096903 2015 Assessment Report J1 & J2 Claims Rock - Geochemistry, Prospecting - Other
093799 1997 1997 Assessment Report Describing Geological and Geochemical Surveys Carried out on the Tack 1 to 550 Claim, Finlayson Lake Area, Yukon Territory Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology
093584 1996 Dighem V Survey for Westmin Resources Limited Wolverine Lake Project Yukon Electromagnetic - Airborne Geophysics, Magnetic - Airborne Geophysics
093622 1996 1996 Assessment Report Describing Geological and Geochemical Surveys Carried out on the Tuchitua Project Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other
090578 1979 Report on Geological Mapping and Geophysical Surveys Detailed Bedrock Mapping - Geology, Magnetics - Ground Geophysics
090187 1976 Geological Report Green Stuff Claims Prospecting - Other

Related References

Number Title Page(s) Document Type
ARMC016606 Geological map - 105H/5 - 'Money Creek' Geoscience Map (Geological - Bedrock)
Citations

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