General Information
Primary Commodities: silica
Deposit Type(s): Unknown
Location(s): 61.440560 N, -136.661670 W
NTS Mapsheet(s): 115H07
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Lascas cl 1-2 (YA98072) in Jun/87 by Dodgex Ltd, which carried out prospecting and geological mapping later in the year.
In May/2001, R. Morgan staked Big cl 1-4 (YC19258) 3 km to the southwest, Top cl 1-4 (YC19250) 2 km to the southeast and Red cl 1-4 (YC19254) 3.5 km to the north. In Sep/2001, Morgan contracted Apex Geoscience Ltd, a company experienced in diamond exploration to collect heavy mineral panned concentrate and silt samples from the 3 claim groups.
Capsule Geology
The occurrence is located approximately 2 km northwest of Long Lake in the Aishihik Lake area of southwestern Yukon. The area is underlain by Early Jurassic intrusive rocks assigned to the Aishihik batholith and the Long Lake plutonic suite. Although spatially associated with the Aishihik batholith, field relationships suggest that the Long Lake plutonic suite is slightly younger.
Dodge staked the Lascar claims to cover a deposit of pure industrial grade quartz that forms a vein that intrudes quartz monzonite assigned to the Long Lake plutonic suite. Four assays of representative samples ranged from 99.3 to 98.8% SiO2.
Morgan staked the various claim groups on the belief that they hosted quantities of diamond indicator minerals. Apex Geoscience collected 3 heavy mineral panned concentrate and 2 silt samples and sent them to the Saskatchewan Research Council (SRC), laboratory in Saskatoon, Saskatchewan. The samples were processed and picked for gold grains and diamond indicator minerals. No diamond indicator minerals were found and the silt samples returned a high of 61 ppb gold.
References
APEX GEOSCIENCE LTD, May/2002. Assessment Report #094302 by D. Besserer.
DODGEX LTD, Jun/88. Assessment Report #092474 by J. S. Dodge.
GORDEY, S.P. AND MAKEPEACE, A.J. 2003: Yukon Digital Geology, version 2.0, S.P. Gordey and A.J. Makepeace (comp); Geological Survey of Canada, Open File 1749 and Yukon Geological Survey, Open File 2003-9 (D).
JOHNSTON, S.T. AND TIMMERMAN, J.R., 1994a. Geology of the Aishihik Lake and Hopkins Lake Areas (115 H/6,7), southwest Yukon. In: Yukon Exploration and Geology 1993, Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 93-110.
JOHNSTON, S.T. AND TIMMERMAN, J.R., 1994c. Geological map of the Hopkins Lake map area, southwest Yukon (115 H/7). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1994-2(G). (Replaced by Geoscience Map 1997-8).
JOHNSTON, S. AND TIMMERMAN, J. 1997. Geology of Hopkins Lake map area, Yukon (115 H/7). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Geoscience Map 1997-8.
JOHNSTON, S.T., MORTENSEN, J.K. AND ERDMER, P. 1996. Igneous and metamorphic age constraints for the Aishihik metamorphic suite, southwest Yukon. Canadian Journal of Earth sciences v. 33, p. 1543-1555.
YUKON EXPLORATION 1988, p. 173.
Staked as Lascas cl 1-2 (YA98072) in Jun/87 by Dodgex Ltd, which carried out prospecting and geological mapping later in the year.
In May/2001, R. Morgan staked Big cl 1-4 (YC19258) 3 km to the southwest, Top cl 1-4 (YC19250) 2 km to the southeast and Red cl 1-4 (YC19254) 3.5 km to the north. In Sep/2001, Morgan contracted Apex Geoscience Ltd, a company experienced in diamond exploration to collect heavy mineral panned concentrate and silt samples from the 3 claim groups.
Capsule Geology
The occurrence is located approximately 2 km northwest of Long Lake in the Aishihik Lake area of southwestern Yukon. The area is underlain by Early Jurassic intrusive rocks assigned to the Aishihik batholith and the Long Lake plutonic suite. Although spatially associated with the Aishihik batholith, field relationships suggest that the Long Lake plutonic suite is slightly younger.
Dodge staked the Lascar claims to cover a deposit of pure industrial grade quartz that forms a vein that intrudes quartz monzonite assigned to the Long Lake plutonic suite. Four assays of representative samples ranged from 99.3 to 98.8% SiO2.
Morgan staked the various claim groups on the belief that they hosted quantities of diamond indicator minerals. Apex Geoscience collected 3 heavy mineral panned concentrate and 2 silt samples and sent them to the Saskatchewan Research Council (SRC), laboratory in Saskatoon, Saskatchewan. The samples were processed and picked for gold grains and diamond indicator minerals. No diamond indicator minerals were found and the silt samples returned a high of 61 ppb gold.
References
APEX GEOSCIENCE LTD, May/2002. Assessment Report #094302 by D. Besserer.
DODGEX LTD, Jun/88. Assessment Report #092474 by J. S. Dodge.
GORDEY, S.P. AND MAKEPEACE, A.J. 2003: Yukon Digital Geology, version 2.0, S.P. Gordey and A.J. Makepeace (comp); Geological Survey of Canada, Open File 1749 and Yukon Geological Survey, Open File 2003-9 (D).
JOHNSTON, S.T. AND TIMMERMAN, J.R., 1994a. Geology of the Aishihik Lake and Hopkins Lake Areas (115 H/6,7), southwest Yukon. In: Yukon Exploration and Geology 1993, Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 93-110.
JOHNSTON, S.T. AND TIMMERMAN, J.R., 1994c. Geological map of the Hopkins Lake map area, southwest Yukon (115 H/7). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Open File 1994-2(G). (Replaced by Geoscience Map 1997-8).
JOHNSTON, S. AND TIMMERMAN, J. 1997. Geology of Hopkins Lake map area, Yukon (115 H/7). Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Geoscience Map 1997-8.
JOHNSTON, S.T., MORTENSEN, J.K. AND ERDMER, P. 1996. Igneous and metamorphic age constraints for the Aishihik metamorphic suite, southwest Yukon. Canadian Journal of Earth sciences v. 33, p. 1543-1555.
YUKON EXPLORATION 1988, p. 173.
Location Map
Last Updated: Jun 27, 2014
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2001 | Geochemistry: Silt | Samples collected to check for diamond indicator minerals. |
| 2001 | Lab Work/Physical Studies: Heavy Mineral Concentrate | Heavy mineral panned concentrates. |
| 1987 | Geology: Bedrock Mapping | |
| 1987 | Other |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Stikinia
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Long Lake
Formation:
Member:
Terrane:
Period Max: Jurassic
Age Max: 186 MA
Period Min: Jurassic
Age Min: 183 MA
Rock Major: granodiorite/diorite/monzodiorite
Rock Minor:
Reference: Tempelman-Kluit (1974) - GSC Map 17-1973
Geological Unit (1M): EJL
Geological Unit (250K): EJgL
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 092474 | 1987 | Geological Report | Rock - Geochemistry, Bedrock Mapping - Geology |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC016651 | Geochemical results map - 115H/7 - Hopkins Lake | Geochemical Map |
| Citations |
|---|
