SMDI #: | 1534 | Showing Name: | Laird Island Uranium Occurrences 1, 2, and 3 | Disposition: | MC00000046 | Location: | King Lake - Laird Island | NTS Area: | 74N14 | TRM: | 124-18-3 | UTM13-Northing (NAD83/Zn13): | 6634805.76 | UTM13-Easting (NAD83/Zn13): | 270877.88 | Commodity: | U | Associated Commodities: | Cu | Type: | Outcrop Channel |
Mineral Resource Assessment: | Occurrence | Mineral Deposit Type: | Beaverlodge-Type Uranium +/- Polymetallic | Geological Domain: | Zemlak | Revised On: | 2010/06/08 |
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The showing, or Laird Island Uranium Occurrences 1, 2, and 3 are located on the narrow strip of land between the north shore of King Lake (on Laird Island) and the northwest shore of Laird Island in Tazin Lake.
The area of the showing is underlain by a northeast-trending sequence of Tazin Group granites and paragneisss which contain thin bands of amphibolite. In 2005, Ashton et al mapped these rocks as unit Gm or Archean coarse-grained to feldspar-porphyritic granite. The granites are unconformably overlain to the northwest by gently dipping conglomerate, arkose and siltstone of the Martin Formation.
Occurrence No. 1 consists of intermittent cross fractures trending 330° for a length of 480 ft (146 m). The north fracture zone is exposed for 380 ft (116 m) and is separated from the 100 ft (30.5 m) long southern fracture by 100 ft (30.5 m) of intermittently radioactive, discontinuous fractures. The northern fracture exhibits continuous radioactivity for 100 ft (30.5 m) and the southern one for 75 ft (23 m). This occurrence is the most easterly of the three. 3 channel samples taken over the most radioactive sections assayed 0.66% U3O8 over 2 ft (0.6 m), 0.16% U3O8 over 1 ft (0.3 m) and 4.8% U3O8 over 1.5 ft (0.5 m).
Occurrence No. 3 consists of a 140 ft (43 m) fracture zone striking 310° and dipping 80°SW. The central 40 ft (12 m) are the most strongly radioactive. Five channel samples were taken over 10 ft (3 m) intervals and averaged 0.38% U3O8 over 3.6 ft (1.1 m).
Occurrence No. 2 has a main fracture that is on strike with No. 3 and the shore arm curves eastward to trend on strike with Occurrence No. 1. The occurrence forms a Y at the base of Occureence No. 1. One channel sample from this zone yielded 0.37% U3O8 across 4 ft (1.2 m).
Pitchblende in these showings occurs as grains, veinlets and botryoidal masses associated with fracture fillings of calcite ±quartz and hematite ± minor chalcocite, covellite and native copper. |
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The occurrences were worked by New Mylamaque Mines Ltd. From 1953-1964. All of the VOY Claims were explored by geological mapping, prospecting and trenching in 1953. Eight showings were outlined and tested by 55 diamond drill holes totalling almost 9000 ft (2743 m). Showings 1, 2 & 3 were tested by 21 holes and the surrounding area by an additional 19 holes. All drilling yielded poor results.
The VOY claims became ML 5029 in 1964 and were transferred to Northgate Explorations Ltd. In 1968. In 1969, ground grid scintillometer, topographic and geological surveys were completed. R.W. Johns produced mineral distribution maps based on 487 chip samples. A broad band lying along the northwest shore of Laird Island and extending into Tazin Lake was recommended for further study. As a result, CBS 1132 was staked by Dejour Mines Ltd. And an underwater radiometric and echo-sounding depth survey was contracted out to G. Goldac as a joint venture to test a possible fault zone offshore from ML 5029. An east-west linear anomaly was detected over the predicted course of a fault that transects Laird Island. Based on this information drill hole L-1-74 was drilled in 1974.
In 2005, K. Ashton et al re-mapped the showing area at 1:50,000 for the Saskatchewan Government. |
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Assessment 74N14-0006;-0007;-0034;-0041;-0043; LiteratureAshton, K.E., Card, C.D., Modeland, S (2005): Geology of the Tazin-Tsalwor Lake Area: Sask. Geol. Survey Summary of Investigations 2005 - CD ROM. Beck, L.S. (1969): Uranium Deposits in the Athabasca Region: DMR Rep. No. 126; p98-99. Koster, F. (1968): Geology of the Zin Bay Area: DMR Report No.121, p31; |
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