- SMDI #
- 2696
- Current Showing Name
- Drill hole Q27B-57
- Historical Showing Names
- Drill hole Q27B-57
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 545606.2800
- UTM Northing (NAD83 Z13)
- 6446630.3500
- NTS Sheet
- 074I01
- TRM (Township-Range-Meridian)
- 105-14-2
- Primary Commodities
- Uranium
- Associated Commodities
- Iron
- Discovery Type
- Drillhole
- Status
- Occurrence: Primary Exploration
- Geological Details
- Drill hole Q27B-57, which was completed to test the Q27B-G1 TDEM conductor, is located southeast of Natona Bay on Waterbury Lake and 1.5 miles (2.4 km) southeast of the Natona Bay showing or SMDI 2193. The drill hole is located at Q-27B grid coordinates 3+00E and 6+07S.
Drill hole Q27B-57 encountered 11.4 m (37.4 ft) of Quaternary overburden on top of 82.0 m (269.0 ft) of Helikian Athabasca Group Mfc Formation. Unit Mfc consists of strongly to moderately bleached, silicified, strongly limonitized, and locally strongly hematized sandstone with silty and arenaceous interlayers. Unit Mfc is underlain by 197 m (646.3 ft) of Athabasca Group Mfb Formation or a sequence of moderately limonitized, moderately to strongly hematized, silicified and strongly bleached sandstones with intercalated silty and conglomeratic horizons. Unit Mfb has a fanglomerate basal unit.
The Athabasca Group sandstones in drill hole Q27B-57 are moderately to strongly altered and are cross-cut by a series of fractures and faults which have been infilled by white to yellow clay-sand material. The upper 45 m (147.6 ft) of the sandstone column is strongly bleached and limonitized. The basal 3.2 m (10.5 ft) of the Athabasca Group, which contains the uranium mineralization, is strongly chloritized and contains patchy brick red hematite stain. The remainder of the sandstone exhibits moderate bleaching and silicification.
The unconformably underlying Wollaston Domain Precambrian rocks consist of foliated, bleached and hematized, strongly to moderately graphitic semipelitic to pelitic metasediments which have been cross-cut by a series of chlorite-graphite filled shear zones and faults. The basement rocks, which have been extensively intruded by concordant pegmatite, show no indication of hydrothermal alteration.
The uranium mineralization in drill hole Q27B-57 is confined to the basal fanglomerate in the Athabasca Group Mfb Formation. The host conglomerate to fanglomerate, which is strongly chloritized and hematized, consists of angular cobbles in a matrix of black to green clay±chlorite ±hematite.
DRILLHOLE INTERSECTION WIDTH PPM PPM PPM PPM PPM PPM PPM HOST
NUMBER (M) (M) PB NI CO CU V AS U ROCK
_____________________________________________________________________________
Q27B-57 289.0 - 289.5 0.5 30 41 10 6 170 23 637 conglomerate
289.5 - 290.0 0.5 110 145 37 9 305 134 4689 conglomerate
290.0 - 290.5 0.5 108 198 32 5 209 105 4327 conglomerate
- Geological Domain
- Wollaston
- Host Rocks
- Host Minerals
- Hematite
- Indicators
- Exploration History
- 7/14/1999 The Q-27B grid was established in 1980. In this year, ground VLF-EM, magnetic, PEM and DEEPEM surveys were completed on the grid.
In 1984, ground magnetic, DEEPEM, HLEM, turam, resistivity and VLF-EM surveys were completed over grid Q27B (AF 74I01-0075).
In 1985, SMDC completed ground DEEPEM, UTEM, AMT, VLF-EM, gravity resistivity and magnetic surveys over the Q27B grid. This work was followed up with 30 drill holes (AF 74I01-0076). Radiometric prospecting was completed along the east shore of Natona Bay. Drill hole Q27B-20 discovered the uranium mineralization. which was named the Natona Bay pod (SMDI 2193).
In 1986, SMDC completed ground DEEPEM, magnetic, resistivity and bore hole PEM surveys on the Q27B grid. Drill holes Q27B-38 to -50 were completed to further delineate the Natona Bay uranium mineralization.
In 1988, Cogema completed an fixed-wing EM, GEOTEM and magnetic survey west of the showing and re-logged selective delineation drill holes (AF 74I-0048). On 19 February 1988, the showing area was staked as CBS 9327. The remainder of ML 5485 was restaked as claim blocks or dropped.
In the winter of 1990, a partnership involving Cameco (50.076%), CEGB (7.5%), PNC Canada (17.989%), and Kepco Exploration (4.320%) completed drill holes 27B-51 to -55 immediately to the southeast of the Natona Bay deposit on the Q-27B grid (AF 74I01-0082). No significant uranium mineralization was encountered. In 1991, the partners completed ground TDEM and boulder sample surveys over the Q47 grid to the southwest of the showing (AF 74I01-0083). In 1992, the partners completed a boulder sample survey of the Q-27 grid which covered the showing (AF 74I-0057).
In the winter of 1995 to 1996, Cameco completed a TDEM survey and drill holes Q27B-56 to -58 to test the Q27B-G1 and G2 conductors to the east of the Natona Deposit (AF 74I-0064). Drill hole 27B-57intersected the uranium mineralization which constitutes this showing. In the following year, a ground IP/resistivity survey was completed on the Q27B-G1 grid (AF 64L05-0147).
In 1998, Cameco completed TDEM, magnetic, and gravity surveys and drill hole Q27b-61 on grid Q-27B-G3 which is located slightly west of the south end of the lake immediately west of SMDI 2696 (AF 74I-0066). The hole failed to intersect significant mineralization.
- Production History
- Reserves and/or Resources