General Information
Secondary Commodities: antimony, arsenic, copper
Deposit Type(s): Unknown
Location(s): 62.631940 N, -138.1325 W
NTS Mapsheet(s): 115J09
Location Comments: .5 Kilometres
Hand Samples Available at YGS: Yes
Capsule
Work History
Staked as Hay cl 1-90 (Y39409) in Oct/69 by Nicanex Mines Ltd which explored with grid soil sampling and geological mapping in 1970.
Restaked as Butter cl 1-116 (YC15179) in Jun/99 by Deltango Gold Ltd which carried out an extensive reconnaissance scale silt, pan concentrated, soil and rock sampling program later in the summer.
Capsule Geology
The claims are located in the Dawson Range, a metamorphic and magmatic welt which trends northwest across the north-central portion of the Yukon-Tanana Terrane. The area is located in an un-glaciated area of the Yukon, thus outcrop is very limited. Geological mapping is restricted to ridge tops, rock chips in residual soils and numerous frost heaved blocks of rocks. The area was re-mapped by Payne et al., in 1987 under an economic agreement funded by the Canada-Yukon Economic Development Agreement. In 1995, S. Johnston employed by the Yukon Geology Program (now known as the Yukon Geological Survey) used results reported in a 1994 Geological Survey of Canada Airborne Geophysical Survey to further refine the mapping.
The occurrence is underlain by mid-Cretaceous coarse-grained biotite-hornblende granodiorite belonging to the Dawson Range Batholith. To the north the batholith intrudes Devonian to Mississippian metasedimentary and metamorphic rocks assigned to the Wolverine Creek metamorphic suite. The metasediments consists of mainly carbonaceous quartzite and micaceous quartzite with subordinate mica schist and rare marble. The metavolcanic unit is mainly composed of medium- to coarse-grained leucocratic, equigranular hornblende-biotite quartz diorite to granodiorite gneiss. These rocks are inferred to be metamorphosed igneous rocks, including both metavolcanic and metaplutonic varieties. Numerous small dykes of varying composition are know to intrude the area.
Soil sampling by Nicanex Mines outlined two weak copper anomalies; one at the southwest end of the claims (occurrence location) and the other at the northeast end of the property. Neither anomaly appears to have been follow-upped.
Deltango Gold¿s exploration consisted of a ¿first pass¿ geochemical sampling program over the entire claim block. Soil sampling did not return any areas of interest. Silt and pan concentrate results display significant differences between the area of Dawson Range Batholith granitic rocks and the metamorphic to the north in most metals however neither group returned any strong anomalies. The exploration program was terminated before any follow-up of initial response could be undertaken.
References
DELTANGO GOLD LTD, Dec/2000. Assessment Report #094172 by G. Jilson.
EVERS, K.G., ET AL., An alpine peridotite in the Dawson Range, Yukon-Tanana Terrane: Preliminary results and interpretations. In: Yukon Exploration and Geology 2000, D.S. Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 137-146.
GEOLOGICAL SURVEY OF CANADA, 1994A. Airborne Geophysical Survey, Selwyn River ¿ East, Yukon Territory (NTS 115 I/12 & 115J/9). Open File 2816.
JOHNSTON, S.T., 1995. Geological compilation with interpretation from geophysical surveys of the northern Dawson Range, central Yukon (115J/9 & 10; 115I/12). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1995-2(G), 1:100 000 scale.
JOHNSTON, S.T., AND SHIVES, R.B.K., 1995. Interpretation of an airborne multiparameter geophysical survey of the northern Dawson Range, central Yukon: A progress report. In Yukon Exploration and Geology, 1994. Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 105-111.
MINERAL INDUSTRY REPORT 1969-70, p. 69.
NICANEX MINES LTD, Oct/70. Assessment Report #060248 by T.L Sadlier-Brown and E.O Chisholm.
PAYNE, J.G. ET AL., 1987. Geology of Colorado Creek (115-J/10), Selwyn River (115-J/9), and Prospector Mountain (115-I/5) map areas, western Dawson Range, west-central Yukon. Exploration and Geological Services Division, Indian and Northern Affairs Canada, Yukon region, open File 1987-3, 141 p.
Staked as Hay cl 1-90 (Y39409) in Oct/69 by Nicanex Mines Ltd which explored with grid soil sampling and geological mapping in 1970.
Restaked as Butter cl 1-116 (YC15179) in Jun/99 by Deltango Gold Ltd which carried out an extensive reconnaissance scale silt, pan concentrated, soil and rock sampling program later in the summer.
Capsule Geology
The claims are located in the Dawson Range, a metamorphic and magmatic welt which trends northwest across the north-central portion of the Yukon-Tanana Terrane. The area is located in an un-glaciated area of the Yukon, thus outcrop is very limited. Geological mapping is restricted to ridge tops, rock chips in residual soils and numerous frost heaved blocks of rocks. The area was re-mapped by Payne et al., in 1987 under an economic agreement funded by the Canada-Yukon Economic Development Agreement. In 1995, S. Johnston employed by the Yukon Geology Program (now known as the Yukon Geological Survey) used results reported in a 1994 Geological Survey of Canada Airborne Geophysical Survey to further refine the mapping.
The occurrence is underlain by mid-Cretaceous coarse-grained biotite-hornblende granodiorite belonging to the Dawson Range Batholith. To the north the batholith intrudes Devonian to Mississippian metasedimentary and metamorphic rocks assigned to the Wolverine Creek metamorphic suite. The metasediments consists of mainly carbonaceous quartzite and micaceous quartzite with subordinate mica schist and rare marble. The metavolcanic unit is mainly composed of medium- to coarse-grained leucocratic, equigranular hornblende-biotite quartz diorite to granodiorite gneiss. These rocks are inferred to be metamorphosed igneous rocks, including both metavolcanic and metaplutonic varieties. Numerous small dykes of varying composition are know to intrude the area.
Soil sampling by Nicanex Mines outlined two weak copper anomalies; one at the southwest end of the claims (occurrence location) and the other at the northeast end of the property. Neither anomaly appears to have been follow-upped.
Deltango Gold¿s exploration consisted of a ¿first pass¿ geochemical sampling program over the entire claim block. Soil sampling did not return any areas of interest. Silt and pan concentrate results display significant differences between the area of Dawson Range Batholith granitic rocks and the metamorphic to the north in most metals however neither group returned any strong anomalies. The exploration program was terminated before any follow-up of initial response could be undertaken.
References
DELTANGO GOLD LTD, Dec/2000. Assessment Report #094172 by G. Jilson.
EVERS, K.G., ET AL., An alpine peridotite in the Dawson Range, Yukon-Tanana Terrane: Preliminary results and interpretations. In: Yukon Exploration and Geology 2000, D.S. Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 137-146.
GEOLOGICAL SURVEY OF CANADA, 1994A. Airborne Geophysical Survey, Selwyn River ¿ East, Yukon Territory (NTS 115 I/12 & 115J/9). Open File 2816.
JOHNSTON, S.T., 1995. Geological compilation with interpretation from geophysical surveys of the northern Dawson Range, central Yukon (115J/9 & 10; 115I/12). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1995-2(G), 1:100 000 scale.
JOHNSTON, S.T., AND SHIVES, R.B.K., 1995. Interpretation of an airborne multiparameter geophysical survey of the northern Dawson Range, central Yukon: A progress report. In Yukon Exploration and Geology, 1994. Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 105-111.
MINERAL INDUSTRY REPORT 1969-70, p. 69.
NICANEX MINES LTD, Oct/70. Assessment Report #060248 by T.L Sadlier-Brown and E.O Chisholm.
PAYNE, J.G. ET AL., 1987. Geology of Colorado Creek (115-J/10), Selwyn River (115-J/9), and Prospector Mountain (115-I/5) map areas, western Dawson Range, west-central Yukon. Exploration and Geological Services Division, Indian and Northern Affairs Canada, Yukon region, open File 1987-3, 141 p.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1999 | Geology: Bedrock Mapping | |
| 1999 | Other | |
| 1999 | Other | |
| 1970 | Geochemistry: Soil | |
| 1970 | Geology: Bedrock Mapping |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Whitehorse
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 112 MA
Period Min: Cretaceous
Age Min: 100 MA
Rock Major: granodiorite, granite, quartz diorite, diorite
Rock Minor:
Reference: Ryan et al. (2013) - GSC CGM 116
Geological Unit (1M): mKW
Geological Unit (250K): mKgW
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 094172 | 2000 | Geochemical and Geological Report on the Butter Claims | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Heavy Mineral Concentrate - Lab Work/Physical Studies | ||
| 060248 | 1970 | A Geochemical Report on the Hay Claims 1-90 | Soil - Geochemistry |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC016555 | Photo interpretation map of geology with coloured sections - 115J/9 - Selwyn River | Geoscience Map (Geological - Bedrock) | |
| ARMC016554 | Photo interpretation map showing claims - 115J/9 - Selwyn River | Geoscience Map (General) | |
| ARMC016556 | Geology map - 115J/9 - Selwyn River | Geoscience Map (Geological - Bedrock) |
| Citations |
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