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Occurrence Details


Occurrence Number
115G 100
Occurrence Name
Wash
Occurrence Type
Hard-rock
Status
Prospect


General Information

Secondary Commodities: copper, platinum, palladium, nickel
Aliases: Burwash
Deposit Type(s): Ultramafic Mafic Alaskan-type Pt+/-Os+/-Rh+/-Ir
Location(s): 61.440280 N, -139.385280 W
NTS Mapsheet(s): 115G06
Location Comments: 1 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Staked as Wash cl 1-51 (YA97032) in Mar/87 by Silverquest Resources Ltd (70%) and 2001 Resource Industries Ltd (30%), which carried out prospecting, geological mapping and geochemical sampling later in the year.
The west central portion was restaked as Burwash cl 1-9 (YB36423) in Aug/91 by Nordac Resources Ltd, which carried out prospecting, geological mapping and geochemical soil sampling in 1998 and prospecting, geochemical soil sampling and hand trenching in 1999 and 2000. The company also staked Burwash cl 10-33 (YC18485) in Feb/2000 to surround the original claim group on three sides.
Nordac Resources Ltd was reorganized in June 2001 and renamed Strategic Metals Ltd. Exploration in 2005 consisted of prospecting, geochemical sampling, road construction and 520 m of HQ diamond drilling in seven holes. An eighth hole was abandoned due to water issues. Drilling in 2005 tested the Tom zone where drilling has defined mineralization over a 200 m strike length at relatively shallow depth.

Capsule Geology

Pyrrhotite, chalcopyrite and pentlandite occur as disseminations and fracture fillings in mafic-ultramafic intrusions of Lower to Middle Triassic age that intrude pyroclastic rock of the Pennslyvanian to Permian Station Creek Formation and metasedimentary rocks of the Permian Hasen Creek Formation. The intrusions are predominantly comprised of dunite, peridotite, clinopyroxenite and gabbro, which is localized along the margins of the intrusions and in nearby subparallel sills.
Soil sampling identified two areas of anomalous multi-element geochemical response that coincide well with the surface trace of the intrusions. The main anomaly begins at the western boundary of the property and extends easterly for 1 150 m and is up to 650 m wide and contains peak values of 3 630 ppm Ni, 4 750 ppm Cu, 654 ppb Pd and 336 ppb Au. The peak value for Pt (550 ppb) lies just off the property, 300 m to the south, where a second cluster of anomalous values occur in the vicinity of a small mafic-ultramafic body and an isolated gabbro dyke.
The highest rock values came from specimens collected within areas of anomalous soil geochemical response. The best specimens from the main soil geochemical anomaly were gabbro or peridotite containing abundant disseminated sulfides or limonite while malachite bearing gabbro and phyllite produced the highest assays in the vicinity of the southerly soil anomaly. Peak values for rocks are 43 000 ppm Cu, 15 200 ppm Ni, 2 200 ppb Pt, 2 169 ppb Pd and 1 050 ppb Au.
Sampling of Trench T99-6, within the southerly soil geochemical anomaly, produced the highest rock assays to date, returning 4 839 ppm Ni, 1 218 ppm Cu, 1 096 ppb Pt, 658 ppb Pd and 217 ppb Au over a width of 11 m. The ratio of precious metals to base metals in all the trenches averages 3.16 g/t combined Pt-Pd-Au for each 1% combined Cu-Ni.

References

CAMPBELL, R.B. AND DODDS, C.J., 1982. Geology of the S.W. Kluane Lake map area (115G and F (E ½)), Yukon Territory; Geological Survey of Canada, Open File 829.

CAMPBELL, S.W., 1976. Nickel-copper sulphide deposits in the Kluane Ranges, Yukon. DIAND Open File Report, EGS 1976-10.

GOLDEN CHALICE RESOURCES INC AND STRATEGIC METALS INC, Feb/2006.  Assessment Report # 094669 by R.C. Carne.

HULBERT, L.J., 1997. Geology and metallogeny of the Kluane mafic-ultramafic belt, Yukon Territory, Canada: Eastern Wrangellia ¿ A new Ni-Cu-PGE metallogenic terrane. Geological Survey of Canada, Bulletin 506, 265 p.

NORDAC RESOURCES LTD, Mar/99. Assessment Report #093947 by R.C. Carne.

NORDAC RESOURCES LTD, Dec/99. Assessment Report #094039 by T.C. Becker.

NORDAC RESOURCES LTD, Dec/2000. Assessment Report #094130 by T.C. Becker.

SILVERQUEST RESOURCES LTD, Feb/88. Assessment Report #092094 by W.D. Eaton.

STRATEGIC METALS LTD., News Release, 30 Sept/05.

YUKON EXPLORATION 1987, p. 250-251.

YUKON EXPLORATION AND GEOLOGY 1998, p. 29; 1999, p. 24, 30; 2000, p. 23, 26.

Location Map

Last Updated: Jun 28, 2013

Work History

Year Work Type Comment
2005 Drilling: Diamond Number of holes drilled: 7 Amount of work done: 520 METRES
2005 Other
1999 Other
1999 Other
1999 Trenching: Hand
1998 Geology: Bedrock Mapping
1998 Other
1998 Other
1987 Geology: Bedrock Mapping
1987 Other

Regional Geology - Terrane

Group: Insular
Affinity: NE Panthalassa
Name: Wrangellia
Realm: Panthalassa


Regional Geology - Bedrock

Supergroup:
Group/Suite: Kluane ultramafic
Formation:
Member:
Terrane: Wrangellia
Period Max: Triassic
Age Max: 232 MA
Period Min: Triassic
Age Min: 219 MA
Rock Major: peridotite/dunite
Rock Minor: pyroxenite/gabbro
Reference: Israel & van Zeyl (2004) - YGS OF 2004-20
Geological Unit (1M): LTrK
Geological Unit (250K): LTrK1

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
095445 2011 Assessment Report Describing Geophysical Work Specifically 2010 TEM Survey on the Burwash Property Electromagnetic - Airborne Geophysics, EM - Ground Geophysics
094894 2007 Assessment Report Describing 2007 Geophysical Surveys at the Burwash Property Magnetic - Airborne Geophysics, VTEM - Airborne Geophysics
094669 2005 Assessment Report Describing 2005 Diamond Drilling, Soil Sampling, Prospecting and Geological Mapping on the Burwash Property All Weather Road - Development, Surface, Diamond - Drilling, Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other 8 529.13
094523 2004 Assessment Report Describing Prospecting, Soil Geochemistry and Excavator Trenching Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Mechanical - Trenching
093108 1986 A Summary Report on the Klu Platinum-Nickel Prospect Yukon Territory Research/Summarize - Pre-existing Data
092054 1953 Report on the Geophysical Surveys in the Shakwak Valley Area, Yukon Territory for Canalask Nickel Mines Limited. Magnetic - Airborne Geophysics

Drill Core at YGS Core Library

Number Property Year Drilled Core Size Photos Data
BUR-08-01 Burwash 2008 BTW 4 2
BUR-08-02 Burwash 2008 BTW 2 2
BUR-08-03 Burwash 2008 BTW 12 2
BUR-08-04 Burwash 2008 BTW 16 2
BUR-08-05 Burwash 2008 BTW 12 2
BUR-05-01 Burwash 2005 HQ 8 4
BUR-05-02 Burwash 2005 HQ 12 4
BUR-05-03 Burwash 2005 HQ 20 4
BUR-05-04 Burwash 2005 HQ 10 4
BUR-05-05 Burwash 2005 HQ 14 4
BUR-05-06 Burwash 2005 HQ 12 4
BUR-05-07 Burwash 2005 HQ 10 4

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