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Occurrence Details


Occurrence Number
105G 038
Occurrence Name
North River
Occurrence Type
Hard-rock
Status
Showing


General Information

Secondary Commodities: copper, zinc, silver, lead
Deposit Type(s): Skarn Cu
Location(s): 61.197780 N, -130.406110 W
NTS Mapsheet(s): 105G01
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Staked as MM cl (75349) in Sep/60 by Cassiar Asbestos Corporation Ltd, which carried out only prospecting and limited sampling.
Restaked as Shutout cl 1-108 (YB58953) in Mar/95 by Expatriate Resources Ltd who completed a program of grid establishment, prospecting, and soil sampling in 1995 and flew combined EM and magnetic surveys in 1996. In Mar/96 the company staked Shutout cl 109-158 (YB77893). Additional geological mapping, prospecting, trenching, soil sampling, and claim surveys were carried out during the 1996 summer field season. In 1997 Expatriate¿s exploration program continued with detailed geological mapping, prospecting, soil sampling and minor hand trenching.

Capsule Geology

The occurrence is located in the Finlayson Lake district of the Yukon Tanana Terrane. Mapping completed by Murphy and Piercey (1999, map; 2001 map), shows that the area is located in the footwall of the Money Creek Thrust and is underlain by a sequence of layered metamorphic rocks. The oldest unit in the area is Murphy¿s unit Dq. The unit is thought to be Upper Devonian or older (?) in age and consists of biotite-muscovite-feldspar-quartz schist, micaceous quartzite and psammite. Unit Dq is overlain by the Upper Devonian to Lower Mississippian Fire Lake metavolcanic unit, (unit DF) which is comprised of massive to subtly layered biotite-plagioclase-actinolite-chlorite schist and lesser carbonaceous phyllite and quartzite and marble. Unit CI, a medium grey to white, massive to foliated limestone, locally containing crinoid and fossil fragments occurs above unit DF.
The sequence is intruded to the south by voluminous granite meta-plutonic rocks of the Simpson Range Plutonic suite (units MSg and MSgs). In the occurrence area, the suite comprises variable foliated, medium to coarse-grained, equigranular granite to quartz-monzonite. To the north, in the hanging wall of the Money Creek Thrust, the area is intruded by units MSg and a Devonian to Mississippian gabbroic unit (unit DMgo).
The occurrence consists of small pods and lenses of chalcopyrite and pyrrhotite found to occur in skarn at the contact between Carboniferous limestone (unit Cl) and a small granitic stock (unit MSg). Following the discovery of the Kudz Ze Kayah volcanogenic massive sulphide (VMS) deposit (Minfile Occurrence #105G 117) 30 km to the northwest, the region was re-examined for its VMS potential.
Six mineral showings have been discovered in various structural and stratigraphic settings on the property. Foliaform sulphide mineralization has been discovered in three areas within the quartzite and greenstone rocks (Templeman-Kluit, Pigage and Owerko Showings). The other showings are intrusive hosted (Sax Showing), skarn related (Bell Showing) and fracture controlled (Downs Showing). In many instances pyrite present in the showings weathers to form large distinct orange to rust brown gossans. All showings are within 5 kilometres and to the east of original Minfile Occurrence # 105G 038 (this occurrence).
Work during Expatriate¿s 1995 soil sampling program delineated several anomalous areas, located in the east, central and west portions of the property. All anomalies are coincident copper and molybdenum with elevated responses in other elements. The 1996 airborne geophysical survey outlined 4 potential EM targets, that although did not exhibit good conductivity attributes, did have magnetic correlations. ¿Target 3¿, although not coincendent with any of the above showings, was considered the best exploration target because it is coincident with an isolated magnetic response and is located downhill of a soil anomaly which is moderately to strongly anomalous in As (50-100 ppm), Mo(>10 ppm), Pb(>100 ppm), Ag (>2.0 to 7.8 max ppm), Cu(>200 ppm), and Zn(>1000 ppm). Targey 3 is approximately 4 km east-southeast of this minfile occurrence.
Work during the 1996 summer field season was also carried out on the Bell and Sax showings. The Bell Showing consists of sphalerite with lesser pyrite and trace galena occurring as disseminations and bands within a series of small diopside-garnet skarn zones. Peak assay values were 15.6% Zn, 3 890 ppm Pb, and 57.4 g/t Ag. The Sax Showing was hand trenched exposing gossanous felsic volcanic rocks with disseminated and banded pyrite, galena and red sphalerite. An averaged rock chip sample taken in the trench returned 1.34% Pb and 0.53% Pb over 5.6 m.
Work during the 1997 summer field season included hand trenching (6 trenches), mapping, and soil sampling which outlined 4 large (up to 800 by 2400 m) copper multi-element anomalies scattered across the property. Best trench samples bottomed out in oxidized soils and returned up to 1 885 ppm Cu, 3.5 % Pb, 4 120 ppm Zn, 115 ppm Ag and 1 145 ppb Au (no widths given). A float locale named ¿Owerko Showing¿ contained a yellow-red limonite boxwork textured cobble 10 cm in diameter that returned 1 575 ppm Cu, 8 650 ppm Pb and 345 g/t Ag.

References

EXPATRIATE RESOURCES Ltd, Aug/96. Assessment Report #093490 by W.A. Wengzynowski.

EXPATRIATE RESOURCES Ltd, Feb/97. Assessment Report #093655 by R.W. Woolham.

EXPATRIATE RESOURCES Ltd, Jun/97. Assessment Report #093673 by A. Burget.

EXPATRIATE RESOURCES Ltd, Sep/98. Assessment Report #093891 by W.D. Eaton.

EXPATRIATE RESOURCES Ltd, 1999. Assessment Report #093992 by W.A. Wengzynnowski.

MURPHY, D.C., 1998. Stratigraphic framework for syngenetic mineral occurrences, Yukon Tanana Terrane south of Finlayson Lake: A Progress Report. In: Yukon Exploration and Geology 1997, Exploration and Geological Services Division, Indian and Northern Affairs Canada, p.51-58.

MURPHY, D.C., AND PIERCEY, S.J., 1999. Finlayson project: Geological evolution of Yukon-Tanana Terrane and its relationship to Campbell Range belt, northern Wolverine Lake map area, southeastern Yukon. In: Yukon Exploration and Geology 1998, C.F. Roots and D.S. Emond (eds.), Exploration and Geological Services Division, Indian and Northern Affairs Canada, p.47-62.

MURPHY, D.C. and PIERCEY, S.J., 1999. Geological map of parts of Finlayson Lake (105G/7, 8 and parts of 1, 2, and 9) and Frances Lake (parts of 105H/5 and 12) map areas, southeastern Yukon (1:100 000-scale). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1999-4.

PIERCEY, S.J., HUNT, J.A. and MURPHY, D.C., 1999. Lithogeochemistry of meta-volcanic rocks from Yukon-Tanana Terrane, Finlayson Lake region, Yukon: Preliminary results. In: Yukon Exploration and Geology 1998, C.F. Roots and D.S. Emond (eds.), Exploration and Geological Services Division, Indian and Northern Affairs Canada, p.125-138.

MURPHY, D.C. AND PIERCEY, S.J., 2000. Syn-mineralization faults and their re-activation, Finlayson Lake massive sulphide district, Yukon-Tanana Terrane, southeastern Yukon. In: Yukon Exploration and Geology 1999, D.S. Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 55-66.

MURPHY D.C. et al, 2001. Preliminary Bedrock Geological Map of Northern Finlayson Lake Area (NTS 105G) Yukon Territory (100 000 scale), Open File 2001-33.

MURPHY et al., 2001. Finlayson Lake Targeted Geoscience Initiative (southeastern Yukon), Part 1: Bedrock Geology. In Yukon Exploration and Geology, 2001, Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 189-207.

YUKON EXPLORATION & GEOLOGY 1995, p. 12, 16; 1996, p. 17, 30, 32.

Location Map

Last Updated: Sep 10, 2018

Work History

Year Work Type Comment
1997 Geochemistry: Soil
1997 Geology: Bedrock Mapping
1997 Trenching: Hand
1996 Airborne Geophysics: Electromagnetic Also magnetic survey.
1996 Geochemistry: Soil
1996 Geology: Bedrock Mapping
1996 Trenching: Hand
1996 Other: Prospecting
1996 Other: Surveying Surveyed claims.
1995 Geochemistry: Soil
1995 Other: Prospecting
1960 Other: Prospecting
1960 Geochemistry: Soil

Regional Geology - Terrane

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


Regional Geology - Bedrock

Supergroup:
Group/Suite: Finlayson
Formation: Waters Creek
Member: mafic metavolcanic
Terrane: Yukon-Tanana
Period Max: Devonian
Age Max: 365 MA
Period Min: Devonian
Age Min: 357 MA
Rock Major: chl phyllite
Rock Minor:
Reference: Murphy et al. (2004) - YGS OF 2004-11
Geological Unit (1M): DMF
Geological Unit (250K): DMF1

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
095585 2011 Rock Sampling and Geochemistry Work Completed on the Shutout Property Rock - Geochemistry, Detailed Bedrock Mapping - Geology, EM - Ground Geophysics, Magnetics - Ground Geophysics, Prospecting - Other, Digitizing Data - Pre-existing Data
095433 2010 Assessment Report of Geology, Geochemistry and Geophysics Work Completed on the Shutout Property Yukon Territory, Canada Rock - Geochemistry, Detailed Bedrock Mapping - Geology, EM - Ground Geophysics, Magnetics - Ground Geophysics, Prospecting - Other
094584 2005 Assessment Report Describing Prospecting on the Shutout Property Soil - Geochemistry, Prospecting - Other
093992 1998 Assessment Report Describing Geological Mapping and Prospecting on the Shutout Property Rock - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other, Hand - Trenching
093891 1997 Assessment Report Describing Geological Mapping, Prospecting and Soil Geochemistry on the Shutout Property Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other, Hand - Trenching
093673 1996 Assessment Report Describing Geological Mapping, Prospecting, Soil Geochemistry, Airborne Geophysics and Claim Surveys on the Shutout Property Electromagnetic - Airborne Geophysics, Magnetic - Airborne Geophysics, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other
093655 1996 Report on a Combined Helicopter-Borne Electromagnetic and Magnetic Survey, Goal Net, Hat Trick, League, Offside, Power Play, Shutout and Slapshot Properties Electromagnetic - Airborne Geophysics, Magnetic - Airborne Geophysics
093490 1995 Assessment Report Describing Prospecting and Geochemical Surveys on the Shutout Property Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other

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