- SMDI #
- 2740
- Current Showing Name
- Maverick Uranium Zone
- Historical Showing Names
- Maverick Uranium Zone
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 491918.0000
- UTM Northing (NAD83 Z13)
- 6363731.0000
- NTS Sheet
- 074H06
- TRM (Township-Range-Meridian)
- 97-20-2
- Primary Commodities
- Uranium
- Associated Commodities
- Arsenic, Cobalt, Copper, Lead, Nickel, Zinc
- Discovery Type
- Drillhole
- Status
- Deposit: Advanced Exploration
- Geological Details
- The uranium mineralization discovered by drill hole ML00-03, which was later named the Maverick Uranium Zone, is located 2.75 km (1.71 miles) southwest of the southwest tip of Moore Lake and 2.9 km (1.8 miles) southwest of JNR Resources drill hole MT-5 or SMDI 2458. The discovery drill hole is located at Moore Lake Fold grid coordinates 4850N and 10600E.
Much of the showing area is masked by a thin (3.3 m or 10.8 ft) cover of Pleistocene to recent glacial sands, tills, and alluvium. In the showing area, drumlins form a series of prominent ridges.
The showing area, under the Pleistocene drift cover, is underlain by 250 to 350 m (820.2 to 1148.3 ft) of Helikian Athabasca Group sandstones and conglomerates of the Manitou Falls Formation Units A, B, and C (Mfa, MFb, and MFc). The Athabasca Group, in outcrop, dips shallowly (2° to 8°) to the south. In drill hole ML00-03, The Manitou Falls Formation Unit C (MFc) is 38.3 m (125.7 ft) thick. The moderately to strongly bleached and, locally, hematized and limonitized (fracture controlled), and clay-altered unit consists of a series of pale pink to yellow to white sandstones. This is underlain by 220.5 m (723.4 ft) of Manitou Falls Formation Unit b (MFb) red to maroon to pale pink and yellow to white sandstones with thin pebble conglomerate interbeds. The unit MFb sediments are moderately to strongly bleached, moderately to weakly limonitized (controlled by bedding and fractures),moderately desilicified, and weakly to moderately clay-altered. The lower sections of unit MFb are moderately fractured and fracture planes are often limonite and/or hematite coated. Between 165.9 m and 262.1 m (544.3 ft and 859.9 ft), unit MFb is strongly sheared and faulted and the core, which is strongly bleached and desilicified, contains up to 20% clay. Bedding is often rotated 30° to 50° to the core axis and 10% to 50% core loss is experienced when drillint this interval. JNR Resources refers to this interval as the "Athabasca MFb Fault Zone". In the discovery hole, the basal 6.9 m (22.6 ft) of Manitou Falls Formation, which JNR Resources has named the "Athabasca Mineralized Faulted Interval", cannot be subdivided into a unit due to intense faulting and alteration. The radioactive grey to dark grey strongly faulted sandstone has a dark grey to black matrix. This interval has the appearance of a strongly reduced, desilicified, and intensely clay-altered sandstone that contains local radioactive graphitic intervals where the conductor has been faulted into the sandstone. The interval contains disseminated sooty pitchblende and yellow uranium secondary mineralization within these graphitic intervals. The unconformity occurs at 269.0 m (882.5 ft).
The Athabasca Group unconformably overlies a series of Aphebian Wollaston Domain pelites, pelitic gneisses, and minor granite gneisses. Immediately below the unconformity, the strongly fractured and faulted pelites are chlorite altered (due to paleoweathering), moderately to strongly bleached, pervasively hematized, and, locally, replaced by clay minerals. Locally, the pelites are cut by felsic intrusives and they contain narrow granite gneiss interbeds.
The rocks in the showing area were initially contorted by a series of small isoclinal folds (F1). The second generation (f2) folding consists of regional tight to moderately open, northeast-trending, overturned to upright folds that have northeast-trending axes. The third phase of folding resulted in F3 open dome and basinal folding along a northwest-trending axis. The F3 event led to the development of an Archean granite dome to the northwest of the showing. This dome is mantled by Wollaston Domain graphitic pelites. The rocks in the showing area are cut by a series of northeast- and northwest-trending systems of faults. The showing mineralization occurs within a subvertical, east-west trending post Athabasca faulting. This fault parallels a series of graphitic conductors (graphitic pelites). At the showing, three discrete sets of steeply dipping to sub-vertical graphitic conductors, which are cut by at least three prominent fault systems, wrap around the margins of this dome in a fold-like pattern. The east-west conductors dip sub-vertically to the north, the north-south conductors have sub-vertical to steep east dips, and the northeast-trending conductors dip subvertically to the east.
The uranium mineralization at the Maverick Zone occurs in a geological setting that is analogous to the Key Lake deposit mineralization. The mineralization is located along an east-west trending graphitic conductor and structural zone that is adjacent to a basement dome. The host rocks exhibit significant hydrothermal alteration and significant post-Athabasca faulting. The discovery hole intersected 9.2 m (30.2 ft) that returned 0.442e% U3O8 including 1.162e% U3O8 over 2.0 m (6.6 ft) within the basal "Athabasca Mineralized Faulted Zone". Sooty pitchblende and yellow secondary uranium mineralization are visible in the core. By October 2006, the Maverick Zone had been drill-tested over a strike length of 350 m (1148.3 ft). The zone also returns significant base metal values. The better intersections are as follows:
DRILLHOLE INTERSECTION WIDTH PPM PPM PPM PPM PPM PPM HOST
NUMBER (M) (M) U CU NI PB CO AS ROCK
_____________________________________________________________________________
ML00-03 262.0 - 262.5 0.5 550 81 277 251 82 195 sandstone
262.5 - 263.0 0.5 85 59 52 232 11 58 sandstone
263.0 - 263.5 0.5 640 47 160 650 160 176 sandstone
263.5 - 264.0 0.5 1920 1050 489 1510 779 484 sandstone
264.0 - 264.5 0.5 2600 276 970 1000 1970 1060 sandstone
264.5 - 265.0 0.5 3450 210 1810 581 2370 1130 sandstone
265.0 - 265.5 0.5 2650 59 1660 212 2180 1810 sandstone
265.5 - 266.0 0.5 18900 334 13100 479 19000 26900 sandstone
266.0 - 266.5 0.5 4570 32 557 272 215 469 sandstone
266.5 - 267.0 0.5 4130 123 799 250 260 641 sandstone
269.0 - 269.5 0.5 1140 56 4480 118 1210 3450 pelite
269.5 - 270.0 0.5 290 28 1440 52 265 589 pelite
270.0 - 270.5 0.5 50 1 691 18 66 101 pelite
270.5 - 271.0 0.5 1090 35 6800 75 4100 9800 pelite
271.0 - 271.5 0.5 1260 82 3560 65 1130 3140 pelite
ML00-08 319.5 - 320.0 0.5 1050 66 4 147 8 2 pegmatite
320.0 - 320.5 0.5 2210 119 4 410 6 2 pegmatite
321.5 - 322.0 0.5 923 8 3 227 4 <1 pegmatite
322.0 - 322.5 0.5 1930 29 3 463 9 <1 pegmatite
322.5 - 323.0 0.5 788 5 2 172 3 1 pegmatite
324.5 - 325.0 0.5 1160 13 2 211 4 1 pegmatite
02ML-23 300.4 - 301.7 1.3 0.032% -- - --- - - pelite
315.5 - 317.4 2.1 0.400% -- - --- - - pelite
(incl) 315.9 - 316.2 0.3 2.200%
02ML-24 289.3 - 290.0 0.7 0.062% -- - --- - - pelite
295.4 - 297.7 2.3 0.110% -- - --- - - pelite/peg
02ML-25 278.8 - 287.9 9.1 0.620% -- - --- - - unconf/pel
(incl) 282.8 - 287.6 0.5 1.160% clay/pelite
(incl) 285.0 - 287.1 2.1 2.520% pelite
(incl) 286.6 - 287.1 0.5 1.910% pelite
02ML-26 62.5 - 63.3 0.8 0.120% -- - --- - - MFc sst
ML-28 288.0 - 288.8 0.8 0.113e% -- - --- - - gfh pelite
ML-29 261.8 - 267.8 6.0 1.610e% -- - --- - - Mfa sst
(incl) 264.0 - 267.2 3.2 2.900e% -- - --- - - Mfa sst
(incl) 264.5 - 266.4 1.9 4.330e% -- - --- - - Mfa sst
ML-35 262.6 - 273.7 11.1 1.000e% -- - --- - - Mfa/gf pel
The 525 Zone, which is located approximately 1400 m (4593.2 ft) northeast of the Maverick Zone, was discovered by drill hole ML-525. The uranium mineralization present straddles the unconformity and is hosted by Athabasca Group sandstones and by underlying basement pelitic rocks. The better intersections, to date, are as follows:
DRILLHOLE INTERSECTION WIDTH PPM HOST
NUMBER (M) (M) U3O8 ROCK
_______________________________________________
ML-107 1.0 e0.129% graphitic basement pelitic rocks
ML 525 9.1 e0.620% graphitic basement pelitic rocks
incl 0.4 e12.000% graphitic basement pelitic rocks
The 527 Uranium Zone, which was discovered by drill hole ML-527, is located in the Maverick Structural Corridor approximately 450 m (1476.3 ft) northeast of the Maverick Zone. Discovery hole ML-527 intersected 0.41% U3O8 over 6.6 m and 1.1% U3O8 over 1.0 m in Athabasca Group sandstones in a 8 to 10 m (26.3 to 32.8 ft) deep trough (as evidenced by changes in the elevation of the unconformity). The better drill intersections, to date, are as follows:
DRILLHOLE INTERSECTION WIDTH PPM HOST
NUMBER (M) (M) U3O8 ROCK
_______________________________________________
ML-101 6.6 e1.530% basement pelitic rocks
incl 4.2 e2.220%
ML-102 e0.225% basement graphitic pelite
ML-106 4.5 e0.402% sheared,altered,graphitic pelite
incl 1.3 e0.225%
ML-527 6.6 e0.410% Athabasca Group sandstone
1.0 e1.100% 2011 drill program (AF 74H06-0151). Hole ML-165 (83/13, 6365098 N, 494914E; 335 az./-70 incl.; 487 masl elev.; 292.6 m unconformity; 410 m EOH) with intersections of 331 ppm U/0.5 m from 291.85-292.35 m and 4890 ppm U/0.5 m from 292.35-292.85 m associated with sooty pitchblende in fractures at the unconformity. Also anomalous V, Pb, Zn, and Ni values. Hole ML-169 (83/13, 6365080 N, 494923 E; 335/-70; 488 masl; 288.0 UC depth; 318 m EOH) with an intersection of 630 ppm U/1.5 m from 287.25-288.75 m at the unconformity. Also anomalous V, Pb, Zn and Ni values.
- Geological Domain
- Wollaston
- Host Rocks
- Host Minerals
- Arsenopyrite
- Indicators
- Exploration History
- 8/1/2003 Between 1961 and 1964, the government of Saskatchewan completed reconnaissance aeromagnetic surveys over the showing area. Million scale maps were published. The showing area was first covered by Alvin R. Babchuck Permit No. 1 in the mid 1960s. No work was reported on the permit and on 19 November 1969 it was sold and became Calta Mines Ltd. Permit. No. 1. In 1967, A. Baer geologically mapped the showing area at a scale of 1:100,000 for the Geological Survey of Canada. In 1969, Calta flew a reconnaissance airborne radiometric and completed follow-up geological mapping, gravity surveys, and hydrogeochemical sampling (AF 74H06-0002). No further work was reported on the Calta permit and it was dropped on 29 April 1971.
In 1973, Inexco Mining Company flew an airborne radiometric survey that covered the showing area (AF 74H-0011).
The showing area remained open until 26 September 1975. On that date, Unit Uranium Corporation staked CBS 4557 over the showing location. Between 1975 and 1976, a Uranerz Exploration and Mining Company Limited and Inexco partnership flew an airborne EM and magnetic survey that covered the showing area and completed regional lake sediment sampling (AF 74H-0013). In 1976, Noranda Exploration optioned the property and completed airborne EM, magnetic, and radiometric surveys and a follow-up ground program of geological mapping, prospecting, lake sediment sampling, and grid EM and magnetic surveys (AF 74H06-0012). In 1978, they completed a re-interpretation of the Northway airborne magnetic survey (AF 74H06-0027). In 1979, they completed further Turam EM surveys (AF 74H06-0024) and in 1980, they drilled a hole at Meyers Lake to the east of the showing (AF 74H06-0053). In 1982, Noranda completed 2 drill holes to the east of the showing around Moore Lake (AF 74H06-0060). The property was allowed to lapse on 1 July 1978.
In 1980, L. Forsythe geologically mapped the showing area at a scale of 1:100,000 for the Saskatchewan Geological Survey.
On 20 June 1985, Interuranium Canada Limited/Ltee staked the showing area as CBS 7571. Between 1986 and 1987, Interuranium completed ground UTEM and remote sensing surveys, re-interpreted the GEOTEM airborne survey, and completed reconnaissance lake sediment sampling (AF 74H-0033). Between 1987 and 1988, they completed ground UTEM, Max-Min, and magnetic surveys, further lake sediment sampling, and geological mapping and rock sampling (AF 74H-0037). Between 1988 and 1989, they completed 13 drill holes (none in the immediate showing area) and a ground TDEM survey (AF 74H06-0099). In the spring of 1990, they completed a further 3 drill holes (not at the showing location) and a ground gravity survey (AF 74H06-0103).
In 1990, CBS 7571 was reduced and Interuranium staked the showing area as S-101331 within CBS 7571. Between 1990 and 1991, a partnership involving Interuranium Canada, Cameco, and PNC Canada Exploration completed aground gravity and UTEM surveys and a boulder sample program on the claim (AF 74H06-0104). No further work was completed and the claim was eventually dropped.
Between 1998 and 1999, JNR Resources Inc. completed boulder sampling over the showing area. On 1 November 1999, JNR Resources staked the showing area as S-106304. In 2000, JNR Resources Inc completed ground TDEM and magnetic surveys on the Moore Lakes Fold grid and follow-up drill holes ML00-01 to ML00-05 (AF 74H06-0109). Drill hole ML00-03 encountered the mineralization that constitutes the Maverick Zone. Step out drill holes ML00-04 and ML00-05 failed to intersect the mineralization.
Later in the year, Kennecott Canada Exploration joint ventured into the property. They completed seven lines of gravity over the Maverick Zone and drill holes ML00-06 to ML00-14 (AF 74H06-0112). A JNR news release dated 23 June 2000 stated that holes ML00-06 and ML00-07 failed to intersect high grade uranium mineralization and drill hole ML00-08 intersected 0.67% U3O8 over 5.6 m (319.3 m to 319.9 m) in a fractured pegmatite located 60 m (196.9 ft) below the unconformity. In the same year, they completed a boulder sample survey that covered the showing area (AF 74H06-0111). Between 2000 and 2001, Kennecott flew GEOTEM and magnetic surveys over the property and completed ground TDEM and magnetic surveys, and follow-up drill hole 01ML-18 on the Maverick Zone (AF 74H06-0110). The drill hole failed to intersect significant mineralization.
In 2002; Kennecott completed a ground TDEM survey and drill holes 02ML-23 to 02ML-27 (AF 74H06-NE-0116) The better intersections are given above. During the 2003 to 2004 winter, JNR Resources completed drill holes ML-29 to ML-46 on the Maverick Zone (AF 74H06-NE-0117).
In the summer of 2004, a partnership involving JNR Resources and Kennecott Canada Exploration completed drill holes ML-41 to ML-71 and ML-501 to ML-508 plus a ground TDEM survey on the Maverick Zone (AF 74H06-NE-0122 and MEIP file 74H06-NE-0123). This work remains confidential. In the winter of 2005, a JNR Resources-International Uranium Corporation-Kennecott joint venture completed drill holes ML-72 to ML-79 on the Maverick Zone and Maverick Corridor drill holes ML-509 to ML-512, ML-701 to ML-706, and ML-801 to ML-813 and ground TDEM and gravity surveys (AF 74H06-NE-0120) on 6 grids in the showing area. This work remains confidential
On 29 March 2006, JNR Resources announced, through an email, that their 2006 drill program, completed in the Maverick Corridor, had encountered two new zones of uranium mineralization that were named the 525 Zone and the 527 Zone.
- Production History
- Reserves and/or Resources