General Information
Secondary Commodities: lead, silver, zinc
Aliases: Irvine, Source
Deposit Type(s): Vein Polymetallic Ag-Pb-Zn+/-Au
Location(s): 60.624720 N, -131.120560 W
NTS Mapsheet(s): 105B11
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Investigated in 1971-72 with mapping and sampling by Wolf Lake JV (Ashland 0 Can L, Rayrock ML, Can Ind G & OL, Caltor Synd). First staked in Mar/85 by Archer, Cathro as GRA cl (YA73149), which were sold to Nordac Mg Corp and optioned to Shakwak ECL. Shakwak added a large block of SHA cl (YA73348) to the SE in Jun/85 and explored with mapping, sampling and hand trenching later in the year, and mapping, soil sampling and bulldozer trenching in 1986 and 1987. Nordac changed its name to Big Creek Res L in 1987 and carried out geochem sampling and hand trenching in 1988.
Capsule Geology
The discovery showing consists of a 30 m long float train consisting of black manganiferous gossan fragments containing minor galena. This was interpreted as a vein cutting a sequence of interbedded schist and limy phyllite near the contact of the Marker Lake Batholith. A specimen assayed in 1971 returned 3771.3 g/t Ag, 1.2% Pb and 4.0% Zn, but a more representative composite sample of gossan material assayed only 72.0 g/t Ag, 1.5% Pb and 2.1% Zn.
The best trench cut in 1986 returned 3291.3 g/t Ag over 76 cm from a nearby massive galena lens. The galena occurs in a 0.9 to 1.2 m wide, manganese and goethite stained vein zone that trends 085° and was traced for a strike length of 30 m.
References
BIG CREEK RESOURCES LTD, Jul/89. Assessment Report *#092826 by C.A. Main.
SHAKWAK EXPLORATION COMPANY LTD, Jul/86. Assessment Report *#091827 by R.C.R. Robertson.
SHAKWAK EXPLORATION COMPANY LTD, Oct/86. Assessment Report #091921 by G. Davidson.
SHAKWAK EXPLORATION COMPANY LTD, Apr/87. Assessment Report *#091935 by G.S. Davidson.
YUKON EXPLORATION 1985-86, p. 122-123; 1987, p. 78.
YUKON MINING AND EXPLORATION OVERVIEW 1988, p. 17.
Investigated in 1971-72 with mapping and sampling by Wolf Lake JV (Ashland 0 Can L, Rayrock ML, Can Ind G & OL, Caltor Synd). First staked in Mar/85 by Archer, Cathro as GRA cl (YA73149), which were sold to Nordac Mg Corp and optioned to Shakwak ECL. Shakwak added a large block of SHA cl (YA73348) to the SE in Jun/85 and explored with mapping, sampling and hand trenching later in the year, and mapping, soil sampling and bulldozer trenching in 1986 and 1987. Nordac changed its name to Big Creek Res L in 1987 and carried out geochem sampling and hand trenching in 1988.
Capsule Geology
The discovery showing consists of a 30 m long float train consisting of black manganiferous gossan fragments containing minor galena. This was interpreted as a vein cutting a sequence of interbedded schist and limy phyllite near the contact of the Marker Lake Batholith. A specimen assayed in 1971 returned 3771.3 g/t Ag, 1.2% Pb and 4.0% Zn, but a more representative composite sample of gossan material assayed only 72.0 g/t Ag, 1.5% Pb and 2.1% Zn.
The best trench cut in 1986 returned 3291.3 g/t Ag over 76 cm from a nearby massive galena lens. The galena occurs in a 0.9 to 1.2 m wide, manganese and goethite stained vein zone that trends 085° and was traced for a strike length of 30 m.
References
BIG CREEK RESOURCES LTD, Jul/89. Assessment Report *#092826 by C.A. Main.
SHAKWAK EXPLORATION COMPANY LTD, Jul/86. Assessment Report *#091827 by R.C.R. Robertson.
SHAKWAK EXPLORATION COMPANY LTD, Oct/86. Assessment Report #091921 by G. Davidson.
SHAKWAK EXPLORATION COMPANY LTD, Apr/87. Assessment Report *#091935 by G.S. Davidson.
YUKON EXPLORATION 1985-86, p. 122-123; 1987, p. 78.
YUKON MINING AND EXPLORATION OVERVIEW 1988, p. 17.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1988 | Other | |
| 1988 | Trenching: Hand | |
| 1986 | Geochemistry: Soil | |
| 1986 | Geology: Bedrock Mapping | |
| 1986 | Trenching: Mechanical | |
| 1985 | Geology: Bedrock Mapping | |
| 1985 | Other | |
| 1985 | Trenching: Hand | |
| 1971 | Geology: Bedrock Mapping | |
| 1971 | Other |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: Cassiar
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite: Cassiar
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 117 MA
Period Min: Cretaceous
Age Min: 85 MA
Rock Major: granodiorite/quartz diorite/quartz monzonite/granite
Rock Minor:
Reference: Murphy (1988) - YGS OF 1988-1
Geological Unit (1M): mKC
Geological Unit (250K): mKgC
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 092826 | 1989 | Hand Trenching Program Gravel Property Edgar Lake Area, Yukon Territory | Soil - Geochemistry, Prospecting - Other, Hand - Trenching | ||
| 091827 | 1986 | Assessment Report Trenching GRA 1-42, REV 1-16 and SHA 1-147 Mineral Claims Gravel Creek Area | Rock - Geochemistry, Prospecting - Other, Handblast - Trenching | ||
| 091074 | 1982 | Assessment Report Geological and Geochemical Report on the Source 1-24 Mineral Claims | Rock - Geochemistry, Silt - Geochemistry, Bedrock Mapping - Geology |
