General Information
Secondary Commodities: copper, silver
Deposit Type(s): Volcanogenic Massive Sulphide (VMS) Kuroko Cu-Pb-Zn
Location(s): 61.221110 N, -130.088610 W
NTS Mapsheet(s): 105G01
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Originally identified (but never staked) by Archer, Cathro and Associates Ltd who were managing exploration for a joint venture, which carried out regional reconnaissance prospecting, geochemical sampling and geological mapping of this area in 1973.
Staked as Mask cl 1-38 (YB84451) in Oct/95 by Expatriate Resources Ltd, which staked Mask cl 39-90 (YB77943) contiguously to the north and east in Mar/96. Expatriate carried out contour and grid soil geochemical sampling and prospecting later in 1996; a single day of geological mapping, prospecting and contour soil geochemical sampling in 1997; and grid soil and rock geochemical sampling, detailed geological mapping, prospecting and hand pitting in 2000.
Capsule Geology
The occurrence is located within the Yukon-Tanana Terrane of the northern Finlayson Lake district and lies just south of the limit of recent geological mapping in the area by the Yukon Geology Program (Murphy et al, 2001). Extrapolation of regionally mapped units and comparison with more detailed geological mapping by Expatriate personnel suggests that the area is underlain by a layered and intermixed sequence of stongly silicified Upper Devonian to Lower Mississippian metasedimentary and metavolcanic rocks which occur in the hanging wall of the Money Creek thrust.
Mapped units in the area include quartz-muscovite schist (? Murphy¿s unit Miv), carbonaceous phyllite with interbanded locally pyritic chlorite schist (? Murphy¿s DF) and a quartz feldspar porphyry unit (? Murphy¿s DFr) located during a traverse in 1997. The porphyry unit consists of up to 50% feldspar and quartz phenocrysts (3:1 ratio) within a fine grained, dark grey matrix. The poorly exposed unit is thought to represent either an intrusive unit or a crystal tuff. The quartz-muscovite schist unit weathers white to light grey with occasional orange patches and has been interpreted by Expatriate (1997) as a siliceous, pervasively foliated, aphanitic metarhyolite. A rock sample collected from a gossanous zone developed within a section of this unit containing minor pyrite along foliation planes and as fine disseminations returned anomalous values (6.07%) for iron.
Grid and reconnaissance soil geochemical sampling has been carried out over most of the property. Two soil sampling grids, the north and south grids, were established on the main ridges covered by the claim block in 1996. The north grid returned widespread Cu values (up to 231 ppm) that roughly define northwest and northeast anomalous trends within a 1 700 by 1 700 m area. The highest values occur in the vicinity of a gossan developed where a northeast trending fault crosscuts chloritic schist. The south grid returned weakly anomalous Cu values (up to 136 ppm) within a 900 by 600 m arc around the nose of a ridge that show northeast trending patterns that coincide with structural lineaments crosscutting the stratigraphy.
A single piece of semi-massive pyrite float and a well defined limonite float train associated with the crosscutting structural lineaments on the south grid returned elevated silver and arsenic values that Expatriate considered a low priority target.
References
EXPATRIATE RESOURCES LTD, Mar/97. Assessment Report #093644 by A. Burgert.
EXPATRIATE RESOURCES LTD, Dec/97. Assessment Report #093803 by W.A. Wengzynowski.
EXPATRIATE RESOURCES LTD, Dec/2000. Assessment Report #094155 by W.A. Wengzynowski.
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., COLPRON, M., GORDEY, S.P., ROOTS, C.F., ABBOTT, G., LIPOVSKY, P.S., 2001. Preliminary bedrock geological map of northern Finlayson Lake area (NTS 105 G), Yukon Territory (1:100 000 scale). Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Open File 2001-33.
Originally identified (but never staked) by Archer, Cathro and Associates Ltd who were managing exploration for a joint venture, which carried out regional reconnaissance prospecting, geochemical sampling and geological mapping of this area in 1973.
Staked as Mask cl 1-38 (YB84451) in Oct/95 by Expatriate Resources Ltd, which staked Mask cl 39-90 (YB77943) contiguously to the north and east in Mar/96. Expatriate carried out contour and grid soil geochemical sampling and prospecting later in 1996; a single day of geological mapping, prospecting and contour soil geochemical sampling in 1997; and grid soil and rock geochemical sampling, detailed geological mapping, prospecting and hand pitting in 2000.
Capsule Geology
The occurrence is located within the Yukon-Tanana Terrane of the northern Finlayson Lake district and lies just south of the limit of recent geological mapping in the area by the Yukon Geology Program (Murphy et al, 2001). Extrapolation of regionally mapped units and comparison with more detailed geological mapping by Expatriate personnel suggests that the area is underlain by a layered and intermixed sequence of stongly silicified Upper Devonian to Lower Mississippian metasedimentary and metavolcanic rocks which occur in the hanging wall of the Money Creek thrust.
Mapped units in the area include quartz-muscovite schist (? Murphy¿s unit Miv), carbonaceous phyllite with interbanded locally pyritic chlorite schist (? Murphy¿s DF) and a quartz feldspar porphyry unit (? Murphy¿s DFr) located during a traverse in 1997. The porphyry unit consists of up to 50% feldspar and quartz phenocrysts (3:1 ratio) within a fine grained, dark grey matrix. The poorly exposed unit is thought to represent either an intrusive unit or a crystal tuff. The quartz-muscovite schist unit weathers white to light grey with occasional orange patches and has been interpreted by Expatriate (1997) as a siliceous, pervasively foliated, aphanitic metarhyolite. A rock sample collected from a gossanous zone developed within a section of this unit containing minor pyrite along foliation planes and as fine disseminations returned anomalous values (6.07%) for iron.
Grid and reconnaissance soil geochemical sampling has been carried out over most of the property. Two soil sampling grids, the north and south grids, were established on the main ridges covered by the claim block in 1996. The north grid returned widespread Cu values (up to 231 ppm) that roughly define northwest and northeast anomalous trends within a 1 700 by 1 700 m area. The highest values occur in the vicinity of a gossan developed where a northeast trending fault crosscuts chloritic schist. The south grid returned weakly anomalous Cu values (up to 136 ppm) within a 900 by 600 m arc around the nose of a ridge that show northeast trending patterns that coincide with structural lineaments crosscutting the stratigraphy.
A single piece of semi-massive pyrite float and a well defined limonite float train associated with the crosscutting structural lineaments on the south grid returned elevated silver and arsenic values that Expatriate considered a low priority target.
References
EXPATRIATE RESOURCES LTD, Mar/97. Assessment Report #093644 by A. Burgert.
EXPATRIATE RESOURCES LTD, Dec/97. Assessment Report #093803 by W.A. Wengzynowski.
EXPATRIATE RESOURCES LTD, Dec/2000. Assessment Report #094155 by W.A. Wengzynowski.
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., COLPRON, M., GORDEY, S.P., ROOTS, C.F., ABBOTT, G., LIPOVSKY, P.S., 2001. Preliminary bedrock geological map of northern Finlayson Lake area (NTS 105 G), Yukon Territory (1:100 000 scale). Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Open File 2001-33.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2000 | Geology: Bedrock Mapping | |
| 2000 | Other | |
| 2000 | Other | |
| 2000 | Trenching: Hand | |
| 1997 | Geochemistry: Soil | |
| 1997 | Geology: Bedrock Mapping | |
| 1997 | Other | |
| 1996 | Other | |
| 1996 | Other | |
| 1973 | Other | Area was sampled during regional geochemical program funded by private parties. |
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:
Terrane: Yukon-Tanana
Period Max: Devonian
Age Max: 365 MA
Period Min: Devonian
Age Min: 357 MA
Rock Major: ms-qtz phyllite, carbonaceous phyllite
Rock Minor: chl phyllite
Reference: Murphy et al. (2004) - YGS OF 2004-11
Geological Unit (1M): DMF
Geological Unit (250K): DMF2
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 094155 | 2000 | Assessment Report Describing Geological Mapping, Prospecting and Soil Geochemistry on the Mask Property | Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other | ||
| 093816 | 1997 | 1997 Assessment Report Expo/Xpo/Pop/Fly (Including Areas of Base, Ball, Bat, Home & Run Blocks) Properties | Diamond - Drilling, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other | 2 | 368 |
| 093803 | 1997 | Assessment Report Describing Geological Mapping, Prospecting and Soil Geochemistry on the Mask Property | Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other | ||
| 093644 | 1996 | Assessment Report Descibing Prospecting, Geochemistry and Claim Surveys on the Mask Property | Soil - Geochemistry, Prospecting - Other |
