General Information
Secondary Commodities: copper, zinc, silver, lead
Deposit Type(s): Volcanogenic Massive Sulphide (VMS) Kuroko Cu-Pb-Zn
Location(s): 61.282220 N, -130.182780 W
NTS Mapsheet(s): 105G08
Location Comments: .5 Kilometres
Hand Samples Available at YGS: Yes
Capsule
Work History
Staked as Money cl 1-32 (Y84347) in Jul/75 by Cyprus Anvil Mining Corporation and explored by grid soil sampling and magnetic surveys. The Pneumonia group was staked but not recorded, 3.2 km to the north, in early Aug/75 by Finlayson Joint Venture (Standard Oil Company of British Columbia Ltd, Union Oil Company of Canada Ltd, Marietta Resources International Ltd) and explored by soil sampling.
Restaked as Mony cl 1-146 (YB50290) in Jul/94 by Cominco Ltd which carried out geological mapping, prospecting, soil sampling and ground HLEM, magnetic and gravity geophysical surveys later in the summer. In Aug/94 the company staked Mony cl 147-348 (YB55437) to the north.
In 1995 Cominco cut two grids, Mon 25-1 & 25-3 to cover previously identified airborne geophysical targets. Ground HLEM and magnetic surveys, followed by detailed soil sampling programs were carried out on the grids. The remaining Mony claims were explored with limited geological mapping, prospecting and contour soil sampling. In Oct/95 Cominco staked Mony cl 349-721 (YB62899) on the eastern side of the main Mony claim block.
In Sept/95 Atna Resources Ltd staked But cl 1-64 (YB61316) to the east, in between the two main groups of Mony claims.
In 1996 Cominco carried out grid soil sampling and ground geophysical surveying over five grids (MO 3, 4, 5, 6 and 9). Geological mapping and prospecting was also carried out over three of the grids (MO 5, 6 and 9) and geologcial mapping, prospecting and contour soil sampling was completed regionally over the southern portion of the property.
Capsule Geology
The Finlayson Lake region is dominantly underlain by a layered sequence of Devonian to Early Mississippian metavolcanic and metasedimentary rocks of the Yukon-Tanana Terrane (YTT) that have been intruded by Mississippian granitic intrusions and later Jurassic, Cretaceous and Eocene intrusions (Murphy et al., 2001). The YTT is a volcanic-plutonic pericratonic arc assemblage that was strongly deformed and metamorphosed by Late Triassic time. Volcanic-hosted massive sulphide deposits exist at different stratigraphic positions within the YTT.
The original occurrence, discovered by Cyprus, consisted of discontinuous lenses containing minor galena within Devonian Kudz Ze Kayah felsic volcanic schists, according to regional mapping (Murphy et al., 2001). Cyprus also reported finding magnetite-rich horizons within the schists. Soil sampling returned a Zn-Mo +/- Pb-Cu anomaly which the company attributed to elevated background levels within black shale interbeds.
The Pneumonia claims were staked over a well developed gossan, displaying weak malachite staining on a contact with a small granodiorite stock.
Cominco's Mony claims were staked to cover airborne geophysical targets identified by a company-sponsored regional survey flown in early 1994. The resulting claim block extended east of the occurrence, into the hanging wall of the Money Creek Thrust. To the east of the occurrence are ultramafic metaplutonic rocks (Murphy et al., 2001; Unit Dum).
Cominco noted the entire felsic volcanic sequence underlying the claim block is variably pyritic and a favourable host for VMS deposits. Soil samples collected on a grid located in the eastern corner of the claim block identified a moderate to strong Cu (>65 to 250 ppm), Zn (>230 to1 482 ppm), and Ag (>0.7 to 3.0 ppm) anomaly with a strong Ni-Co-Mo-Cd metal signature. Cominco attributed the anomaly to magnetic mafic sill/dykes present in the area. Soil sampling carried out along creek sides and contour lines outlined large areas of weak to moderate Ag (10.8 ppm max) response with isolated Zn (to 511 ppm), Cu (to 275 ppm), and Pb (to 135 ppm) on the western portion of the property. The anomalous samples were collected from an area underlain by metamorphosed felsic volcaniclastic rocks. Prospecting in a creek located near the occurrence uncovered numerous float boulders of strongly pyritic, quartz-sericite schists containing disseminated to weakly banded, fine-grained sphalerite +/- chalcopyrite-galena. Grab samples returned up to 2.1% Zn, 0.4% Cu, 0.3% Pb, and 17.5 g/t Ag. Ground geophysics carried out over a grid in the southeast corner of the claim block identified 2 wide EM trends, oriented in a EW direction, on either side of a very strong 'linear' magnetic anomaly trending across the grid baseline.
The 1995 exploration program was geared towards exploring Mony cl 147-348, which were staked the previous fall. Geophysics carried out on Mon grid 25-1 outlined 2 HLEM conductors and numerous magnetic features, while Mon grid 25-3 failed to return any anomalies of interest. Further exploration determined that grid Mon-25-3 was mislocated. Soil samples collected on Mon grid 25-1 returned numerous scattered anomalous values for Pb (up to 416 ppm) and Zn (up to 756 ppm), with elevated values of Ba (up to 2 898 ppm), Cu (up to 124 ppm) and Ag (up to 2.4 ppm). Soil sampling on Mon grid 25-3 returned weak anomalies for all economic elements. Regional contour soil sampling returned numerous single element anomalies, of which only a few are coincidently anomalous in more than one element.
The 1996 program revealed several moderate to strong geochemically anomalous zones within the southern half of the property. Prospecting in the same area discovered banded iron formation in outcrop at two locations. The most southerly iron formation consists of thin-banded magnetite and manganiferous quartz-barite veins interbedded within a 3 m thick quartz-crystal tuff. Sphalerite occurs in fractures associated with the tuff. The second iron formation, located 3 km north of the other, also occurs within a siliceous felsic tuff, with laminations of magnetite, pyrite and minor sphalerite and galena. The results of the geophysical surveys indicated significant conductive and magnetic responses requiring further followup.
References
BOND, J.D., MURPHY, D.C., COLPRON, M., GORDEY, S.P., PLOUFFE, A., ROOTS, C.F., LIPOVSKY, P.S., STRONGHILL, G., AND ABBOTT, J.G., 2002. Digital compilation of bedrock geology and till geochemistry, northern Finlayson Lake map area, Southeastern Yukon (105G), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Open File Report, 2002-7(D) and Geological Survey of Canada Open File 4243.
COMINCO LTD, Jan/95. Assessment Report #093324 by P.A. MacRobbie.
COMINCO LTD, Jan/96. Assessment Report #093427 by I. Jackisch
COMINCO LTD, Jan/96. Assessment Report #093428 by P.A. MacRobbie
HUNT, J.A., 2001. Volcanic-associated massive (VMS) mineralization in the Yukon-Tanana Terrane and coeval strata of the North American miogeocline, in the Yukon and adjacent areas. Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Bulletin 12, 107 p.
MINERAL INDUSTRY REPORT 1975, p. 166.
MORTENSEN, J.K., AND JILSON, G.A., 1985. Evolution of the Yukon-Tanana terrane: evidence from southeastern Yukon Territory. Geology, vol. 13, p. 806-810.
MURPHY, D.C., 1998. Stratigraphic framework for syngenetic occurrences, Yukon-Tanana Terrane south of Finlayson Lake: A Progress Report. In: Yukon Exploration and Geology 1997, Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 51-58.
MURPHY, D.C., AND PIERCEY, S.J., 1999a. 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., 1999b. 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 Region, Indian and Northern Affairs Canada, Open File 1999-4.
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 Region, Indian and Northern Affairs Canada, p. 55-66.
MURPHY, D.C., COLPRON, M., GORDEY, S.P., ROOTS, C.F., ABBOTT, G., AND 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.
MURPHY, D.C., COLPRON, M., ROOTS, C.F., GORDEY, S.P. AND ABBOTT, J.G., 2002. Finlayson Lake Targeted Geoscience Initiative (southeastern Yukon) , Part 1: Bedrock geology. In: Yukon Exploration and Geology 2001, D.S. Emond, L.H. Weston and L.L. Lewis (eds.), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 189-207.
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.
Staked as Money cl 1-32 (Y84347) in Jul/75 by Cyprus Anvil Mining Corporation and explored by grid soil sampling and magnetic surveys. The Pneumonia group was staked but not recorded, 3.2 km to the north, in early Aug/75 by Finlayson Joint Venture (Standard Oil Company of British Columbia Ltd, Union Oil Company of Canada Ltd, Marietta Resources International Ltd) and explored by soil sampling.
Restaked as Mony cl 1-146 (YB50290) in Jul/94 by Cominco Ltd which carried out geological mapping, prospecting, soil sampling and ground HLEM, magnetic and gravity geophysical surveys later in the summer. In Aug/94 the company staked Mony cl 147-348 (YB55437) to the north.
In 1995 Cominco cut two grids, Mon 25-1 & 25-3 to cover previously identified airborne geophysical targets. Ground HLEM and magnetic surveys, followed by detailed soil sampling programs were carried out on the grids. The remaining Mony claims were explored with limited geological mapping, prospecting and contour soil sampling. In Oct/95 Cominco staked Mony cl 349-721 (YB62899) on the eastern side of the main Mony claim block.
In Sept/95 Atna Resources Ltd staked But cl 1-64 (YB61316) to the east, in between the two main groups of Mony claims.
In 1996 Cominco carried out grid soil sampling and ground geophysical surveying over five grids (MO 3, 4, 5, 6 and 9). Geological mapping and prospecting was also carried out over three of the grids (MO 5, 6 and 9) and geologcial mapping, prospecting and contour soil sampling was completed regionally over the southern portion of the property.
Capsule Geology
The Finlayson Lake region is dominantly underlain by a layered sequence of Devonian to Early Mississippian metavolcanic and metasedimentary rocks of the Yukon-Tanana Terrane (YTT) that have been intruded by Mississippian granitic intrusions and later Jurassic, Cretaceous and Eocene intrusions (Murphy et al., 2001). The YTT is a volcanic-plutonic pericratonic arc assemblage that was strongly deformed and metamorphosed by Late Triassic time. Volcanic-hosted massive sulphide deposits exist at different stratigraphic positions within the YTT.
The original occurrence, discovered by Cyprus, consisted of discontinuous lenses containing minor galena within Devonian Kudz Ze Kayah felsic volcanic schists, according to regional mapping (Murphy et al., 2001). Cyprus also reported finding magnetite-rich horizons within the schists. Soil sampling returned a Zn-Mo +/- Pb-Cu anomaly which the company attributed to elevated background levels within black shale interbeds.
The Pneumonia claims were staked over a well developed gossan, displaying weak malachite staining on a contact with a small granodiorite stock.
Cominco's Mony claims were staked to cover airborne geophysical targets identified by a company-sponsored regional survey flown in early 1994. The resulting claim block extended east of the occurrence, into the hanging wall of the Money Creek Thrust. To the east of the occurrence are ultramafic metaplutonic rocks (Murphy et al., 2001; Unit Dum).
Cominco noted the entire felsic volcanic sequence underlying the claim block is variably pyritic and a favourable host for VMS deposits. Soil samples collected on a grid located in the eastern corner of the claim block identified a moderate to strong Cu (>65 to 250 ppm), Zn (>230 to1 482 ppm), and Ag (>0.7 to 3.0 ppm) anomaly with a strong Ni-Co-Mo-Cd metal signature. Cominco attributed the anomaly to magnetic mafic sill/dykes present in the area. Soil sampling carried out along creek sides and contour lines outlined large areas of weak to moderate Ag (10.8 ppm max) response with isolated Zn (to 511 ppm), Cu (to 275 ppm), and Pb (to 135 ppm) on the western portion of the property. The anomalous samples were collected from an area underlain by metamorphosed felsic volcaniclastic rocks. Prospecting in a creek located near the occurrence uncovered numerous float boulders of strongly pyritic, quartz-sericite schists containing disseminated to weakly banded, fine-grained sphalerite +/- chalcopyrite-galena. Grab samples returned up to 2.1% Zn, 0.4% Cu, 0.3% Pb, and 17.5 g/t Ag. Ground geophysics carried out over a grid in the southeast corner of the claim block identified 2 wide EM trends, oriented in a EW direction, on either side of a very strong 'linear' magnetic anomaly trending across the grid baseline.
The 1995 exploration program was geared towards exploring Mony cl 147-348, which were staked the previous fall. Geophysics carried out on Mon grid 25-1 outlined 2 HLEM conductors and numerous magnetic features, while Mon grid 25-3 failed to return any anomalies of interest. Further exploration determined that grid Mon-25-3 was mislocated. Soil samples collected on Mon grid 25-1 returned numerous scattered anomalous values for Pb (up to 416 ppm) and Zn (up to 756 ppm), with elevated values of Ba (up to 2 898 ppm), Cu (up to 124 ppm) and Ag (up to 2.4 ppm). Soil sampling on Mon grid 25-3 returned weak anomalies for all economic elements. Regional contour soil sampling returned numerous single element anomalies, of which only a few are coincidently anomalous in more than one element.
The 1996 program revealed several moderate to strong geochemically anomalous zones within the southern half of the property. Prospecting in the same area discovered banded iron formation in outcrop at two locations. The most southerly iron formation consists of thin-banded magnetite and manganiferous quartz-barite veins interbedded within a 3 m thick quartz-crystal tuff. Sphalerite occurs in fractures associated with the tuff. The second iron formation, located 3 km north of the other, also occurs within a siliceous felsic tuff, with laminations of magnetite, pyrite and minor sphalerite and galena. The results of the geophysical surveys indicated significant conductive and magnetic responses requiring further followup.
References
BOND, J.D., MURPHY, D.C., COLPRON, M., GORDEY, S.P., PLOUFFE, A., ROOTS, C.F., LIPOVSKY, P.S., STRONGHILL, G., AND ABBOTT, J.G., 2002. Digital compilation of bedrock geology and till geochemistry, northern Finlayson Lake map area, Southeastern Yukon (105G), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Open File Report, 2002-7(D) and Geological Survey of Canada Open File 4243.
COMINCO LTD, Jan/95. Assessment Report #093324 by P.A. MacRobbie.
COMINCO LTD, Jan/96. Assessment Report #093427 by I. Jackisch
COMINCO LTD, Jan/96. Assessment Report #093428 by P.A. MacRobbie
HUNT, J.A., 2001. Volcanic-associated massive (VMS) mineralization in the Yukon-Tanana Terrane and coeval strata of the North American miogeocline, in the Yukon and adjacent areas. Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, Bulletin 12, 107 p.
MINERAL INDUSTRY REPORT 1975, p. 166.
MORTENSEN, J.K., AND JILSON, G.A., 1985. Evolution of the Yukon-Tanana terrane: evidence from southeastern Yukon Territory. Geology, vol. 13, p. 806-810.
MURPHY, D.C., 1998. Stratigraphic framework for syngenetic occurrences, Yukon-Tanana Terrane south of Finlayson Lake: A Progress Report. In: Yukon Exploration and Geology 1997, Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 51-58.
MURPHY, D.C., AND PIERCEY, S.J., 1999a. 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., 1999b. 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 Region, Indian and Northern Affairs Canada, Open File 1999-4.
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 Region, Indian and Northern Affairs Canada, p. 55-66.
MURPHY, D.C., COLPRON, M., GORDEY, S.P., ROOTS, C.F., ABBOTT, G., AND 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.
MURPHY, D.C., COLPRON, M., ROOTS, C.F., GORDEY, S.P. AND ABBOTT, J.G., 2002. Finlayson Lake Targeted Geoscience Initiative (southeastern Yukon) , Part 1: Bedrock geology. In: Yukon Exploration and Geology 2001, D.S. Emond, L.H. Weston and L.L. Lewis (eds.), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 189-207.
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.
Location Map
Last Updated: Jul 24, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1996 | Geochemistry: Soil | |
| 1996 | Geology: Bedrock Mapping | |
| 1996 | Ground Geophysics: Magnetics | Also HLEM survey. |
| 1996 | Other: Prospecting | |
| 1995 | Geochemistry: Soil | |
| 1995 | Geology: Bedrock Mapping | |
| 1995 | Ground Geophysics: Magnetics | Also HLEM ground survey. |
| 1995 | Other: Prospecting | |
| 1994 | Airborne Geophysics: Magnetic | Also HLEM and gravity surveys. |
| 1994 | Geochemistry: Soil | |
| 1994 | Geology: Bedrock Mapping | |
| 1994 | Other: Prospecting | |
| 1975 | Geochemistry: Soil | |
| 1975 | Ground Geophysics: Magnetics |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Grass Lakes
Formation: Kudz Ze Kayah
Member:
Terrane: Yukon-Tanana
Period Max: Devonian
Age Max: 365 MA
Period Min: Devonian
Age Min: 357 MA
Rock Major: fp-ms-qtz schist
Rock Minor:
Reference: Murphy et al. (2001) - YGS OF 2001-33
Geological Unit (1M): DMF
Geological Unit (250K): DMF2
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 093762 | 1997 | 1997 Assessment Report Mony/Jays/Nad/Tua Properties Geologic Mapping, Prospecting, Diamond Drilling, Geochemical Sampling, Linecutting and Geophysics | Diamond - Drilling, Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Gravity Survey - Ground Geophysics, Magnetics - Ground Geophysics, Line Cutting - Other | 1 | 54.30 |
| 093613 | 1996 | 1996 Assessment Report Mony and NAD Properties | Diamond - Drilling, Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Gravity Survey - Ground Geophysics, Magnetics - Ground Geophysics, Line Cutting - Other, Prospecting - Other | 1 | 95.70 |
| 093428 | 1995 | 1995 Assessment Report Mony Property Linecutting, Ground Geophysical Surveys (HLEM/MAG), Soil Geochemistry and Geological Mapping | Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Magnetics - Ground Geophysics, Line Cutting - Other | ||
| 093324 | 1994 | 1994 Assessment Report Mony Property Linecutting, Ground Geophysics (HLEM, Mag ), Soil Geochemistry and Geological Mapping | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Gravity Survey - Ground Geophysics, Magnetics - Ground Geophysics, Line Cutting - Other |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC010056 | Grid soils map - Zinc contours - Money mineral claim group | Geochemical Map | |
| ARMC010052 | Grid magnetic survey map - gammas, values and profiles - Money mineral claim group | Geophysical Map | |
| ARMC010053 | Grid soil geochemical values map - Cu-Pb-Zn ppm - Money mineral claim group | Geochemical Map | |
| ARMC010054 | Grid soils map - Copper contours - Money mineral claim group | Geochemical Map | |
| ARMC010055 | Grid soils map - Lead contours - Money mineral claim group | Geochemical Map | |
| ARMC016590 | Geochemical map - 105G/8 - Wolverine Lake | Geochemical Map | |
| ARMC016578 | Geology map - 10G/8 - Wolverine Lake | Geoscience Map (Geological - Bedrock) | |
| ARMC017622 | Geochemical map of Wolverine Lake - Cu, Pb, Zn, Mn, Mo.W | Geochemical Map |
| Citations |
|---|
