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Occurrence Details


Occurrence Number
105D 100
Occurrence Name
Inco
Occurrence Type
Hard-rock
Status
Showing


General Information

Secondary Commodities: copper, gold, silver
Aliases: Red Ridge, Red Top
Deposit Type(s): Porphyry Cu-Mo-Au
Location(s): 60.36 N, -135.078890 W
NTS Mapsheet(s): 105D06
Location Comments: 1 Kilometres
Hand Samples Available at YGS: Yes

Capsule

Work History

Originally staked as Red cl 1-30 (Y79571) in Jul/74 by Canadian Nickel Company Ltd which carried out soil sampling and geological mapping later in the year, but did not file any work.
Restaked as PCG cl 1-12 (YA86918) in Jun/85 by Havilah Gold Mines Ltd (a wholly owned subsidiary of New Era Developments Ltd), which immediately staked Four F cl 1-64 and 67-109 (YA86930) to surrounded the PCG claims on three sides and carried out prospecting, geological mapping and geochemical rock, soil and stream sediment sampling later that year. In 1986 and 1987, Havilah carried out geological mapping, prospecting, geochemical sampling and hand trenching.
In 1988, New Era took over as operator on the project and staked Perk cl 1-92 (YB20075) contiguously to the south in Jun/88 and Ruff cl 1-28 (YB20651) to the northeast in July/88. During that year the company carried out geochemical sampling, prospecting, geological mapping, road building, bulldozer and backhoe trenching and drilled 23 holes (1 517 m).
Omni Resources Inc staked JTR cl 1 (YC08298) 2 km to the southwest (in Thompson Creek) in Sept/97.
Restaked as Red Top cl 1-6 (YC09143) in Oct/98 by Sidehill Enterprises Ltd (M. Glynn) who had earlier re-examined core from the 1989 drill program that was stored on the property. In 1999 resampling and geochemical analysis of core from 13 of the 1989 drill holes was carried out and Glynn staked Red Top cl 7-8 (YC14696) 0.5 km southwest of the existing Red Top claims.

Capsule Geology

The property covers the hornfelsed contact between an undifferentiated, protacted intrusive complex containing Late Triassic and mid- and Late Cretaceous aged granodiorite to diorite and argillite, limestone, chert and sandstone of the Jurassic Laberge Group. The hornfelsed rocks are rusty weathered and form a large gossan along the central part of the main east-west ridge. Andesitic flows, breccia and tuff of early Mesozoic age outcrop in the west and northeast areas of the property and are cut by northeast trending rhyolite, andesite and fine grained granitic dykes of probable Eocene age.
Initial exploration in 1974 was directed toward minor chalcopyrite and molybdenite in quartz veinlets and disseminations in the hornblende diorite, while later work was directed toward steep-dipping, north-trending vein zones associated with the dykes.
The veins consist of zones of bleached and sheared wall rock up to 5 m wide which contain narrow disseminated quartz veins, weakly mineralized with pyrite, galena, chalcopyrite and sphalerite. Specimens of mineralized quartz assayed up to 6 200 g/t Ag and 28 g/t Au.
Six main zones named Western, Miller, Saddle, Don, Vance and East, which are situated along the main ridge from west to east, have been explored by trenching and diamond drilling;
¿The Western Zone consists of a quartz-carbonate-tetrahedrite vein from which assays up to 2 246 g/t Ag were returned over widths of 10 to 40 cm.
¿The Miller Zone, which consists of a 2 to 3 m wide zone of shearing and alteration that contains galena-quartz pods throughout. Quartz veins, 10 to 20 cm in width occur discontinously in both the footwall and the hangingwall of the zone. Samples from trenches in the area returned up to 470 g/t Ag across 9.8 m and the best result from drilling was 3.5 g/t Au and 341 g/t Ag across 0.76 m from Hole SR88-19.
¿The Saddle Zone consists of limonite-manganese-clay gouge within a 30 m wide zone of alteration and shearing that returned an average 6.1 g/t Au and 423 g/t Ag over 0.5 m for a length of 42 m. Drilling of this zone produced values up to 28.49 g/t Au and 31.51 g/t Ag over 0.4 m.
¿The Don zone was discovered by cross-cut trenching of an area of anomalous silver soil geochemistry. It consists of a 1 m wide zone of argillically altered granodiorite that is silicified and chloritized and contains pods and seams of manganese stained quartz. Sampling returned an average of 10.1 g/t Au and 1 519 g/t Ag across 0.5 m, over a length of 39 m. Three drill holes returned low values for gold and silver, possibly due in part to poor core recoveries.
¿The Vance zone consists of a 45 to 90 cm quartz vein containing abundant malachite and weathered sulfide vugs surrounded by a 1 m wide halo of argillically altered granodiorite. The quartz vein returned an assay of 204 g/t Ag across 0.75 m. The best assay from 8 holes drilled below this zone was 75 g/t Ag over 0.73 m in Hole SR88-12.
¿The East zone which consists of limonitic and clay altered fault gouge with quartz and manganese stained lenses is surrounded by a large argillic alteration halo. Drilling of the zone suffered from very poor core recoveries due to bad ground conditions.
In 1999 a total of 30 intervals, the majority of which were adjacent to previously assayed sections which had returned anomalous gold values, were resampled. Most of these samples returned low to weakly anomalous gold values, except for a previously unsampled section from Hole SR88-12 consisting of fractured, limonitically stained and silicified granodiorite which returned 2.34 g/t Au over 1.5 m.

References

HART, C.J.R. and RADLOFF, J.K., 1990. Geology of Whitehorse, Alligator Lake, Fenwick Creek, Carcross and part of Robinson Map Areas (105D/11, 6, 3 and 7). Indian and Northern Affairs Canada, Yukon Region, Open File 1990-4.

HAVILAH GOLD MINES LTD, Mar/87. Assessment Report #091928 by H.J. Keyser.

HAVILAH GOLD MINES LTD, Aug/87. Assessment Report #091738 by H.J. Keyser.

HAVILAH GOLD MINES LTD, Apr/88. Assessment Report #092128 by T. Garagan.

NEW ERA DEVELOPMENTS LTD, Nov/88. Assessment Report #092577 by R.T. Henneberry.

NEW ERA DEVELOPMENTS LTD, Jun/89. Assessment Report #092736 by R.T. Henneberry.

SIDEHILL ENTERPRISES LTD, Jan/2000. Assessment Report #094136 by M. Glynn.

YUKON EXPLORATION 1987, p. 131-132; 1988, p. 57.

YUKON GEOLOGY AND EXPLORATION 1979-80, p. 164.

Location Map

Last Updated: Sep 15, 2011

Work History

Year Work Type Comment
1999 Other Core from the 1989 drill program was resampled and geochemically analysed.
1988 Development, Surface: All Weather Road
1988 Drilling: Diamond Number of holes drilled: 23 Amount of work done: 1571 METRES
1988 Geochemistry: Soil
1988 Other
1988 Trenching: Mechanical
1987 Geology: Bedrock Mapping
1987 Other
1987 Other
1987 Trenching: Hand
1986 Geology: Bedrock Mapping
1986 Other
1986 Other
1986 Trenching: Hand
1985 Geology: Bedrock Mapping
1985 Other
1985 Other
1974 Geochemistry: Soil
1974 Geology: Bedrock Mapping

Regional Geology - Terrane

Group: Intermontane
Affinity: W Laurentia
Name: Stikinia
Realm: peri-Laurentian


Regional Geology - Bedrock

Supergroup:
Group/Suite: Stikine
Formation:
Member:
Terrane: Stikinia
Period Max: Triassic
Age Max: 218 MA
Period Min: Triassic
Age Min: 208 MA
Rock Major: granite/granodiorite/orthogneiss/quartz diorite/diorite
Rock Minor:
Reference: Hart & Radloff (1990) - YGS OF 1990-4
Geological Unit (1M): LTrS
Geological Unit (250K): LTrgS

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
097234 2018 Assessment Report - Geological Mapping, Rock and Soil Geochemical Sampling at the Red Ridge Property Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology
097089 2017 Assessment Report - Sampling at the Red Ridge Property Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology
095172 2009 Report on Prospecting and Grid Establishment Red Ridge Property Rock - Geochemistry, Line Cutting - Other, Prospecting - Other
094136 1999 Drill Core Re-Evaluation and Geochemical Analysis Historical Drill Core - Geochemistry
092736 1989 Interim Assessment Report, 1988/1989 Stage II Exploration Program on the Red Ridge Property All Weather Road - Development, Surface, Diamond - Drilling, Rock - Geochemistry, Backhoe - Trenching, Mechanical - Trenching 23 1517
092577 1988 1988 Stage 1 Progress Report for Assessment Credit on the Red Ridge Property All Weather Road - Development, Surface, Hand - Trenching, Mechanical - Trenching
092128 1987 Geological and Geochemical Assessment Report on the Red Ridge Property Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other, Hand - Trenching
091738 1986 Geological and Geochemical Assessment Report on the Red Ridge Property Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other, Hand - Trenching
061734 1975 Prospecting and Examination Report Diamond - Drilling, Prospecting - Other

Related References

Number Title Page(s) Document Type
ARMC005336 Reconnaissance report on the Red Ridge property Report
ARMC005345 Property plan map in area of Laf and Fourf claims - overlay Geoscience Map (General)
ARMC005346 Geology and geochemistry map - Red Ridge property - Watson River area Geoscience Map (Geological - Bedrock)
Citations

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