- SMDI #
- 2031
- Current Showing Name
- Union Carbide Drill holes 79-17, 79-40, 79-45, and 79-59 or the Shift Lake Uranium Zone
- Historical Showing Names
- Union Carbide Drill holes 79-17, 79-40, 79-45, and 79-59 or the Shift Lake Uranium Zone
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 451257.8200
- UTM Northing (NAD83 Z13)
- 6351008.8900
- NTS Sheet
- 074H05
- TRM (Township-Range-Meridian)
- 96-24-2
- Primary Commodities
- Uranium
- Associated Commodities
- Graphite, Iron
- Discovery Type
- Drillhole
- Status
- Prospect: Primary Exploration
- Geological Details
- The showing consists of several diamond drill holes which returned anomalous uranium values. Drill hole 79-17 was spudded 0.25 mile (0.4 km) southwest of the south end of Shift Lake.
The area of the showing is overlain by Athabasca Formation rocks; unconformably below is an Archean basement complex of granite gneiss and chloritic metasediments of Aphebian age. On the surface the area consists mostly of sand and large boulder glacial deposits. No outcrop was observed.
Athabasca Formation rocks in the area range from 125 to 200 m thick. They are unmetamorphosed and range from quartz sandstone to subconglomerate and conglomerate. The basement rocks consist mainly of granite gneiss intruded by marrow pegmatites. Overlying the basement unit are metasediments which have undergone biotite-muscovite-garnet grade metamorphism which has commonly retrograded to chlorite. Brick red hematitic alteration often occurs within the basement zone.
The showing consists of several drill holes which intersected anomalous uranium values. Forty eight holes (79-15 to 79-62),totalling 9,752.1 m (31, 995.1 ft) were completed to test HLEM and pulse EM anomalies. Four of the holes intersected values greater than 0.10% U3O8 (0.08% U). Union Carbide hole 79-17 intersected a 2.75 m (9.0 ft) interval which returned 0.62% U3O8 (0.53% U)
Two types of uranium concentrations exist in the core; that in the clay alteration zone of the basement complex near the unconformity and that in association with graphite and or sulphides and arsenides within the metasediments below the clay alteration zone. Those near the unconformity contain the higher grades and thicknesses. Uranium exists as uraninite, thucolite disseminated in clays, or banded in association with marcasite and hydrocarbons.
HOLE INTERVAL WIDTH PCT PCT
NUMBER IN M. IN M. U3O8 U
_________________________________________________
79-17 189.00 to 189.25 0.25 2.420 2.050
189.25 to 189.50 0.25 1.430 1.210
189.50 to 189.75 0.25 1.160 0.980
189.75 to 190.00 0.25 0.684 0.580
190.25 to 190.50 0.25 0.483 0.410
190.75 to 191.00 0.25 0.377 0.320
79-40 203.75 to 204.00 0.25 0.210 0.178
79-45 162.00 to 162.25 0.25 0.190 0.161
162.25 to 162.50 0.25 0.110 0.093
79-59 150.60 to 150.85 0.25 0.130 0.110
150.85 to 151.10 0.25 0.120 0.102
- Geological Domain
- Wollaston
- Host Rocks
- Host Minerals
- Hematite
- Indicators
- Exploration History
- 7/27/1989 The area of the showing, staked as part of Worldwide Energy Co. Ltd. Permit No. 2, was enclosed 16 December 1968. In 1969, they did a geophysical and geological evaluation of their permit area (AF 74H05-0002), but no further exploration records were submitted and the permit lapsed 1 June 1970.
The diamond drill holes comprising the showing lie within CBS 4582 and CBS 4606. CBS 4582, staked 19 September 1975 and CBS 4606, staked 3 October 1975 were held by SMDC and Union Carbide Exploration Corporation.
Work done on CBS 4582 in 1977 consisted of a helicopter-borne radiometric survey, a surficial geology survey, a VLF-EM survey, and lake water and sediment survey (AF 74H05-0024). The next year this was followed up by airborne EM (input) and magnetic surveys culminating in an evaluation of the results (AF 74H05-0025). Union Carbide Canada Ltd. continued exploration in 1979 with ground EM and magnetic surveys and a vector pulse EM survey, (AF 74H05-0053) followed up later that year by exploratory drilling (AF 74H05-0054). It was as a result of this drilling that the drill holes comprising the showing were completed.
CBS 4606 had intense exploration done on it beginning in 1976 and continuing into 1977 with prospecting, grid VLF-EM, magnetic and radiometric surveying, lake water and sediment sampling, airborne radiometric surveying and airphoto interpretation (AF 74H05-0017). In 1978 they flew an EM (input) survey and evaluated the results (AF 74H05-0018). Succeeding exploration work was covered under files 74H05-0053 and 0054, discussed above.
No further exploration work was reported upon until 1982 when SMDC ran a gradiometer survey over the area (AF 74H05-0081).
Both of the claim blocks reverted to mineral leases; CBS 4606 became ML 5462 3 October 1985 and CBS 4582 became ML 5461 19 September 1985.
On 2 May 1996, Norland Exploration Ltd. staked the showing area as CBS 7757. In 1997, Norland completed a recce boulder sample survey which covered the showing (AF 74H-0056).
On 6 May 1999, the claim was transferred to Phelps Dodge Corporation of Canada Ltd. In this year they optioned the property to Uranium Power Corporation and Pacific Amber Resources Ltd. The partnership completed a ground TDEM survey on the Shift Lake grid and drill hole SL-01 to test for a down-dip extension of the mineralization encountered in drill hole 79-17 (AF 74H05-0145). The hole failed to intersect significant uranium mineralization and downhole radiometrics ranged from 3to 128 cps (they feel the zone was missed as the basement pelites dip northeast - not southwest as they felt when the hole was spudded).
In 2000, Phelps Dodge completed 4 drill holes (WL-2 to WL-4 and SL-02) to the southeast of the showing to test for further mineralization (AF 74H05-0147). The drilling failed to intersect significant values.
- Production History
- Reserves and/or Resources