EXTECH IV ATHABASCA URANIUM DEPOSIT DATABASE
Geological Survey of Canada, Saskatchewan Industry and Resources, and Alberta Geological Survey


DEPNO COUNTRY LOCATION ALLNAMES COMMODITIES
40018 Canada (Saskatchewan) 58.04.22 N -- 104.32.19 W Cigar Lake Uranium Deposit U; Co; Ni; Pb; Zn; Cu

Database name: Uranium Deposits, Athabasca Basin
Custodial agency: Geological Survey of Canada
Compilers: Sunil S. Gandhi
Release date: 2007-03-02
   
Deposit name(s): Cigar Lake Uranium Deposit (occurrence name)
Political location(s): Canada; Province or state: Saskatchewan; Nearest community: Key Lake mine-mill complex (110 km 045°)
NTS map data: 074I02 (Blixrud Lake)
Deposit clan (type): Unconformity-associated
Deposit (sub) types: Unconformity-associated - Proterozoic - clay-bound; Deposit straddles the sub-Athabasca unconformity; it was the largest high grade uranium deposit until the McArthur River/ P2 North deposit was discovered in 1988; contains 1 % Ni and 0.15 % Co; Reference: Andrade, N., 2002: Geology of the Cigar Lake Uranium Deposit; Chapter 4, In Field Trip A1: the Eastern Athabasca Basin and its Uranium Deposits, May 24-26, 2002, GAC-MAC Saskatoon 2002, Edited by Andrade, N; Breton, G.; Jefferson, C. W.; Thomas, D. J.; Tourigny, G.; Wilson, S.; Yeo, G. M., Field Guide Book, Geological Association of Canada - Mineralogical Associationof Canada, Geological Association of Canada, 102 p., p. 53 - 71
Deposit status: deposit; Size category: giant
Geologic province: Churchill - Hearne Craton
Geologic subprovince: Wollaston Domain (Fold Belt)
Geologic district: Eastern Athabasca Basin
Deposit object located: drillhole
Commodities: U; Co; Ni; Pb; Zn; Cu
Mineralization styles: massive (above unconformity); vein (above unconformity); massive (below unconformity); vein (basement at unconformity)
Geological ages: Middle Mesoproterozoic (mineralization)
Tectonic setting: epicontinental accretionary wedge-fold belt; transpressive; Formal name: Wollaston Fold Belt (host rocks)
continental basin-intracratonic; stable; Formal name: Athabasca Basin (host rocks)
Coincident features: unconformity (paleoregolith)
ridge (the ridge is up to 30 m high above the general level of unconformity; ore zone drapes over it); Coincident feature name: Basement topographic ridge
shear zone(s) (a major east-striking reverse dextral Hudsonian protomylonitic shear zone dipping south); Coincident feature name: Cigar Lake structural zone
fault(s) (steep E-W normal faults and lower angle E-W reverse faults, at retrograde, post Athabasca stage)
Regional tectonic structure: fold belt (NE-trending regional thermo-tectonic zone; near boundary with Archean Mudjatik Domain to the NW; core of the Trans-Hudson orogen to the SE) Tectonic structure name: Wollaston fold belt
basement granitic dome (interpreted from geophysical data N of deposit)
protomylonitic shear zone (Coincides with basement ridge over which the deposit is draped) Tectonic structure name: Cigar Lake structural zone
Host rocks: (1) metamorphic; paragneiss (includes calc-silicate layers and lenses); Depositional setting: platform-shelf; Metamorphic grade: amphibolite - upper; Component: foot wall
Host rock protoliths:arkosic sandstone (arkosic sandstone with interbedded calcareous layers and lenses)
mudstone
siltstone
graphitic mudstone
Internal host rock structures:layers
Individual lithologies:biotite gneiss
meta-arkose
pelitic gneiss
semipelitic gneiss
graphite schist
Host rock stratigraphy:Lower Wollaston Supergroup

(2) surficial; laterite (unconformity); Host series: paleoregolith; Depositional setting: subaerial; Metamorphic grade: unmetamorphosed; Component: mineralization zone
Host rock protoliths:paragneiss (oxidized red zone near paleosurface 10-20 m thick); Host rock protolith name: Wollaston Supergroup
Host rock stratigraphy:Lower Wollaston Supergroup

(3) sedimentary; sandstone-conglomerate (host of high-grade ore); Depositional setting: fluviatile; Metamorphic grade: unmetamorphosed; Component: perched mineralization
Internal host rock structures:thin to thick beds
Individual lithologies:quartz arenite (heavy mineral bands)
quartz pebble conglomerate
siltstone (subordinate)
Host rock stratigraphy:Bird Member, Manitou Falls Formation
Country rocks: (1) paragneiss; (folded and metamorphosed); Country rock name: unit of Lower Wollaston Supergroup ; Metamorphic grade: amphibolite (upper) - granulite
(2) sandstone-conglomerate; Country rock name: Athabasca Group; Metamorphic grade: unmetamorphosed
(3) overburden; Metamorphic grade: unmetamorphosed
Metallogenic signatures: U-Ni-Co-Cu-As
Alteration signatures: lateritic alteration: strong oxidation indicated by hematite; What was altered: metasediments in basement
diagenetic alteration: clay minerals, hematite coating, secondary silica; What was altered: Athabasca Group
illite alteration: hydrothermal illite halo, intensive quartz dissolu; What was altered: host rocks above and below unconformity
chlorite alteration: hydrothermal Mg-chlorite, dravite; graphite dissol; What was altered: host rocks above and below unconformity
silicification: quartz, replacive and open space fillings; What was altered: Athabasca sandstone above the deposit
Mineralogy: (massive ore): uraninite, pitchblende, coffinite, rammelsbergite, niccolite, gersdorffite, chalcopyrite, pyrite, galena, sphalerite, quartz, chlorite, chlorite, illite
Radiometric ages: Object dated: Mineralogy(1); Age - Ma: 1,362; +11; -11; Dating method: U-Pb; Concentrate: pitchblende; Source rock: mineralization; Event dated: mineralization; Interpretive comment: 4-point regression line; lower intercept 293±16 Ma; another 3-point line shows event at 1287±16 Ma ; Reference: Cumming, G. L.; Krstic, D., 1992: The Age of Unconformity-Related Uranium Mineralization in the Athabasca Basin, Northern Saskatchewan; Canadian Journal of Earth Sciences, Volume 29, p. 1623 - 1639

Object dated: Mineralogy(1); Age - Ma: 1,461; +47; -47; Dating method: U-Pb; Concentrate: uraninite and coffinite; Source rock: mineralization; Interpretive comment: in situ U-Pb analyses using ion microprobe; subsequent ages 1176 ± 9 Ma and 876 ± 14 Ma; Reference: Fayek, M.; Harrison, T. M.; Ewing, R. C.; Grove, M.; Coath, C. D., 2002: U and Pb Isotope Analyses of Uranium Minerals by Ion Microprobe and U-Pb Ages from the Cigar Lake Deposit; Chemical Geology, Volume 13, p. 935
Deposit shape: elongate lenses; Component: multiple lenses
Deposit dimensions:length: 2,150 metre
width: 65 metre
thickness: 40 metre
Qualified comments: (Applies to: discovery and development) The Cigar Lake deposit was discovred in 1981 by Cogema Resources Inc., now AREVA Resources Canada Inc., the operator of the Waterbury Lake Joint Venture. The discovery drill hole was no. 15 in a reconnaissance program of drilling to test anomalies defined by airborne and ground electromagnetic surveys. The ore intersection was at 440 m depth. The deposit was outlined over subsequent years by more than 220 surface diamond dril holes totalling 92 km of drilling. It is 200 m long, 20 to 100 m wide and up to 20 m thick. Its depth is between 410 to 450 m. The higher grade eastern part was discovered in 1983, and was outlined by drill holes 20 m apart along fences spaced at 50 m intervals. Some infill drilling has been done at closer spacing of fences at 25 m and holes at 10 m spacing. The western part of the deposit has been drilled along fences 200 m apart and holes 20 m apart along them. Development of the deposit included a test mining phase during 1987 to 2000. During 2001 to 2004 the project was on care and maintenance. At the beginning of 2002 Cameco Corporation became the operator of the project. The current owners are Cameco, Cogema, Idemitsu and Tepco, with 50, 37, 8 and 5 % interest, respectively. Construction of the production mine commenced in 2005. It is slowed by some flooding. Mining methods selected are boxhole boring and jet drilling of prefrozen orebody.

(Applies to: reserve/resource descriptions) Resources for the East + West zones in 1993: 148000 t U in 1.888 Mt ore averaging 7.84 % U; revised for East zone: recoverable 89076 t U in 0.577 Mt ore grading 15.44 % U, hence it will be mined first. The West zone has approximately 50000 t U in 0.435 Mt ore grading 11.5 % U; it includes 45620 t U in 0.318 Mt grading 14.35 % U; total of West and East zones: 134696 t U in 0.895 Mt grading 15.05 % U.

(Applies to: regional stratigraphy) Country rocks in the vicinity of the Cigar Lake Deposit include Paleoproterozoic rocks of the Lower Wollaston Supergroup, reactivated Archean granitoid gneisses, and unconformably overlying Late Paleoproterozoic-Mesoproterozoic sandstones and conglomerates of the Athabasca Group. An altered regolith marks the unconformity. The Lower Wollaston Supergroup below the unconformity is amphibolite to granulite in metamorphic grade, and includes the metamorphosed pelitic and semi-pelitic equivalents of shale and siltstone with graphitic horizons, and quartzite and meta-arkose with minor calc-silicate and metapelite. The Athabasca Group is represented by three members of the Manitou Falls Formation, the Read Formation which is present in other areas of the basin being absent. The Bird River Member, which rests directly on the regolith, contains conglomerate and sandstone with relict heavy mineral laminae and maroon-coloured late diagenetic to hydrothermal hematite. The Collins Member consists of clean, medium to course-grained sandstone with rare, thin, granule beds. The Dunlop Member is a fine-grained, well-sorted sandstone with abundant clay intraclasts. The rocks were intrudes (after mineralization) by the Mackenzie diabase dyke swarm. Extensive Quaternary till forms fields of southwest-trending drumlins across the area.

(Applies to: regional structure) The Cigar Lake deposit area was affected by the regional east-striking Cigar Lake Structural Zone, a reverse dextral proto-mylonite zone with unknown vertical displacement that is concordant with the steeply south-dipping basement units of the Wollaston Supergroup. This shear zone shows evidence of pre- and post-Athabasca Group displacement. Post-Athabasca Group faults include east-west steeply dipping normal with minor reverse faults, and low-angle, east-west reverse faults, as well as very late fractures. The basement horst upon which the main orebody is draped is located where the Cigar Lake structural zone cuts the unconformity.

(Applies to: property geology) The Cigar Lake deposit is draped over an east-west-trending ridge or horst, along the dextral Cigar Lake Fault, at the unconformity between the continental (fluviatile) Athabasca Group and the basement Paleoproterozoic Wollaston Supergroup. The basement paragneiss units comprise steeply south-dipping pelitic to psammitic gneiss, graphitic pelite, calc-silicate gneiss and meta-arkose. A funnel-shaped zone of hydrothermal chloritic and argillic alteration beneath the deposit is over 200 m wide at the unconformity and extends as much as 100 metres below the deposit. The regolith at the unconformity is about 40 m thick, consisting of an oxidized red zone grading down through a reduced green zone characterized by chlorite, sericite, and clay, to fresh basement. The regolith is strongly overprinted by hydrothermal alteration beneath the ore. The Bird Member of the Manitou Falls Formation, resting directly on the regolith, comprises trough-cross bedded quartz arenite and quartz pebble conglomerate with heavy mineral bands, and siltstone; it is gradationally overlain by the arenaceous Collins Member.

(Applies to: mineralization) The bulk of the ore forms three east-trending elongate horizontal zones with an irregular upward-convex lens-shaped cross-sections, aggregating 2150 metres long, ranging from 25-105 metres wide, and up to 40 metres thick resting on the basement high in the unconformity assemblage. Mineralization and alteration are interpreted as a result of multiphase hydrothermal processes. The first, predominant phase involved deposition of uraninite and coffinite at 1461 +/- 47 Ma followed by arsenide, sulphide and sulph-arsenide minerals. Pitchblende (sooty uraninite) and associated copper sulphate minerals were deposit during the second phase, followed by phase-three uranium silicate, oxide and hydroxide minerals. Minor ore is located in cross-cutting veins below and above, and in perched lenses in sandstone above the unconformity orebody, along steeply dipping faults. The perched mineralization is thought to represent very late-stage remobilization of the unconformity ore.

(Applies to: alteration) The Manitou Falls Formation is overprinted by a concentric domed alteration halo above the deposit. Volume loss equivalent to about 30 million tonnes of rock is associated with faulting and collapse due to dissolution of quartz and other minerals, including zircon, from the lowest 50 m of the section, leaving only residual clay. The deposit is mantled by an illite-chlorite clay cap including intense deep red hydrothermal hematite, surrounded in outward succession by extremely clay-altered sandstone, grey-coloured bleached sandstone, a zone of quartz crystals - iron sulphide - hydrocarbonaceous material (quartz precipitation marks the outer limit of quartz dissolution), and an outer zone of grey, bleached sandstone extending up to 300 metres above the deposit. This grades into the background regional sandstone - typically pink to pale red with patches and liesegang bands of hematite cement.

(Applies to: geophysical surveys) Aeromagnetic data 'see through' the Athabasca Group cover and map basement supracrustal units as lows, with granitoid rocks as highs. The graphitic metapelite in the Cigar Lake fault zone is one of many local to regional conductors within the aeromagnetic lows that can be mapped by airborne to ground electromagnetic methods. Audiomagnetotelluric methods can trace this conductivity more than a kilometre beneath the surface, and identify quartz dissolution zones by their lower resistivity. Seismic reflection can generate laterally continuous images of the unconformity and provides data for structural cross sections showing offsets of the P2 and other faults, with pseudo-3D data providing a topographic map of the unconformity surface, documenting the location of ore zones at fault intersections. The ore bodies are dense but too small to generate gravity anomalies that can be measured at surface, however the large quartz dissolution zone produces a gravity low, and the different basement rock units have different densities that can be modeled. Borehole geophysics provides bulk geophysical rock parameters that allow calibration of geological properties to geophysical properties.
Links to other databases: SMDI; Key value: 1856
GSC U-Th File (Prasad); Key value: 9970
References:
Andrade, N., 2002
Geology of the Cigar Lake Uranium Deposit
Chapter 4, In Field Trip A1: the Eastern Athabasca Basin and its Uranium Deposits, May 24-26, 2002, GAC-MAC Saskatoon 2002, Edited by Andrade, N; Breton, G.; Jefferson, C. W.; Thomas, D. J.; Tourigny, G.; Wilson, S.; Yeo, G. M., Field Guide Book, Geological Association of Canada - Mineralogical Associationof Canada, Geological Association of Canada, 102 p., p. 53 - 71

Anonymous Editor(s)), 2002
Uranium 2001: Resources, Production and Demand
Joint Report by the OECD Nuclear Energy Agency and the International Atomic Energy Agency, OECD Nuclear Energy Agency and International Atomic Energy Agency, International Atomic Energy Agency, Vienna, Red Book, 348 p..

Bennett, R. W., 2002
Geological Atlas of Saskatchewan, Version 5 (2002)
Government of Saskatchewan, CD-ROM

Brouand, M.; Cuney, M., 2005
Chemical Characteristics of the Clastic Sediments from Proterozoic Basins: Their Relation with Unconformity Type Uranium Deposits
Topic: Uranium Geology & Deposits, In Symposium on Uranium Production and Raw Materials for Nuclear Fuel Cycle - Supply and Demand, Economics, the Environment and Energy Security (IAEA-CN-128): Extended Synopses, Edited by Anonymous, International Atomic Energy Agency Conference (International Symposium), IAEA in co-operation with OECD/NEA, WNA, NEI and UN-ECE, International Atomic Energy Agency, CN-128, 344 p., p. 52 - 56

Bruneton, P., 1987
Geology of the Cigar Lake Uranium Deposit (Saskatchewan, Canada)
In Economic Minerals of Saskatchewan, Edited by Gilboy, C. F.; Vigrass, L. W., Special Publication, Saskatchewan Geological Society, Saskatchewan Geological Society, 8, 216 p., p. 99 - 119

Bruneton, P., 1993
Geological Environment of the Cigar Lake Deposit
Canadian Journal of Earth Sciences, Volume 30, p. 653 - 673

Cumming, G. L.; Krstic, D., 1992
The Age of Unconformity-Related Uranium Mineralization in the Athabasca Basin, Northern Saskatchewan
Canadian Journal of Earth Sciences, Volume 29, p. 1623 - 1639

Dubessy, J.; Landais, P.; Wang, A., 1989
Graphite Disordering during the Gneissic Basement Alteration in the Saskatchewan Uranium Deposits
In Uranium Resources and Geology of North America, Edited by Anonymous, TECDOC, International Atomic Energy Agency, Vienna, International Atomic Energy Agency, Vienna, Austria, 500, 529 p., p. 345 - 355

Fayek, M.; Harrison, T. M.; Ewing, R. C.; Grove, M.; Coath, C. D., 2002
U and Pb Isotope Analyses of Uranium Minerals by Ion Microprobe and U-Pb Ages from the Cigar Lake Deposit
Chemical Geology, Volume 13, p. 935

Fogwill, W. D., 1985
Canadian and Saskatchewan Uranium Deposits: Compilation, Metallogeny, Models, Exploration
Chapter 1, Section Canadian and Saskatchewan Uranium Industry, In Geology of Uranium Deposits, Edited by Sibbald, T. I. I.; Petruk, W., Special Volume, The Canadian Institute of Mining and Metallurgy, The Canadian Institute of Mining and Metallurgy, 32, 268 p., p. 3 - 19

Fouques, J. R.; Fawler, M.; Knipping, H. D.; Schimann, K., 1986
The Cigar Lake Uranium Deposit: Discovery and General Characteristics
Chapter 4, Section Saskatchewan Unconformity-associated and Sedimentary-hosted Deposits of Helikian Age, In Uranium Deposits of Canada, Edited by Evans, E. L., Special Volume, The Canadian Institute of Mining and Metallurgy, The Canadian Institute of Mining and Metallurgy, 33, 323 p., p. 218 - 229

Jefferson, C. W.; Thomas, D. J.; Gandhi, S. S.; Ramaekers, P.; Delaney, G.; Brisbin, D.; Cutts, C.; Portella, P.; Olson, R. A., 2007
Unconformity-associated uranium deposits of the Athabasca Basin, Saskatchewan and Alberta
In EXTECH IV: Geology and Uranium EXploration TECHnology of the Proterozoic Athabasca Basin, Saskatchewan and Alberta, Edited by Jefferson, C. W.; Delaney, G., Bulletin, Geological Survey of Canada, 588

Landais, P.; Dubessy, J.; Dereppe, J.-M.; Philp, R. P., 1993
Characterization of Graphite Alteration and Bitumen Genesis in the Cigar Lake Deposit (Saskatchewan, Canada)
Canadian Journal of Earth Sciences, Volume 30, p. 743 - 753

Le Carlier de Veslud, C.; Royer, J.-J.; Cuney, M.; Kister, P.; Lorilleux, G., 2003
Understanding Uranium Deposits through 3D Geological Modelling
In Proceedings of an International Conference on Uranium Geochemistry 2003, Nancy - France, April 13 - 16, 2003: Extended Abstracts (Recueil des Conferences Colloque International Géochimie de l'Uranium 2003), Edited by Cuney, M., Proceedings of International Conference (Extended Abstracts), Unité Mixte de Recherche - Géologie et Gestion des Ressources Minérales et Enérgetiques, 7566 Nancy, France, 409 p., p. 215 - 218

LeCheminant, A. N.; Heaman, L. M., 1989
Mackenzie Igneous Events, Canada: Middle Proterozoic Hotspot Magmatism Associated with Ocean Opening
Earth and Planetary Science Letters, Volume 96, p. 38

Lewry, J. F., 1978
A Review of Pre-Athabasca Basement Geology in Northern Saskatchewan
In Uranium Exploration Techniques: 1978 November 16-17 Regina Symposium Proceedings, Edited by Parslow, G. R., Special Publication, Saskatchewan Geological Society, 4, 330 p., p. 19 - 58

Lewry, J. F.; Sibbald, T. I. I., 1980
Thermotectonic Evolution of the Churchill Province in Northern Saskatchewan
Tectonophysics, Volume 68, p. 45 - 82

Lewry, J. F.; Collerson, K. D., 1990
The Trans-Hudson Orogen: Extent, Subdivision and Problems
In The Early Proterozoic Trans-Hudson Orogen, Edited by Lewry, J. F.; Stauffer, M. R., Special Paper, Geological Association of Canada, Geological Association of Canada, 37, p. 1 - 14

Lewry, J. F.; Stauffer, M. R. Editor(s)), 1990
The Early Proterozoic Trans-Hudson Orogen
Special Paper, Geological Association of Canada, Geological Association of Canada, 37

McIlveen, D., 2006
The Cigar Lake Deposit
C, Section Athabasca Basin Uranium Deposits, In Abstracts Volume for the 2006 CIM Uranium Field Conference, September 11-12, Saskatoon; Uranium: Athabasca Deposits & Analogues, Edited by Quirt, D., Abstracts Volume, Canadian Institute of Mining and Metallurgy, Saskatoon Section, CIM Geological Society, 164 p., p. 1 - 7

Pacquet, A.; Weber, F., 1993
Pétrographie et Minéralogie des Halos d'Altération autour du Gisement de Cigar Lake et leur Relations avec les Minéralisations
Canadian Journal of Earth Sciences, Volume 30, p. 674 - 688

Pagel, M.; Michard, a.; Juteau, M.; Turpin, L., 1993
Sm-Nd, Pb-Pb, and Rb-Sr Systematics of the Basement in the Cigar Lake Area, Saskatchewan, Canada
Canadian Journal of Earth Sciences, Volume 30, p. 731 - 742

Percival, J. B.; Bell, K.; Torrance, J. K., 1993
Clay Mineralogy and Isotope Geochemistry of the Alteration Halo at the Cigar Lake Uranium deposit
Canadian Journal of Earth Sciences, Volume 30, p. 689 - 704

Philippe, S.; Lancelot, J. R., 1993
Formation and Evolution of the Cigar Lake Uranium Deposit based on U-Pb and K-Ar Isotope Systematics
Canadian Journal of Earth Sciences, Volume 30, p. 720 - 730

Prasad, N., 2002
Uranium File: Canmindex
Geological Survey of Canada, Canadian Mineral Occurrence Index (Canmindex), CD-ROM

Ramaekers, P.; Jefferson, C. W.; Yeo, G. M.; Collier, B.; Long, D. G. F.; Drever, G.; McHardy, S.; Jiricka, D.; Cutts, C.; Wheatley, K.; Catuneanu, O.; Bernier, S.; Kupsch, B.; Post, R., 2007
Revised geological map and stratigraphy of the Athabasca Group, Saskatchewan and Alberta
In EXTECH IV: Geology and Uranium EXploration TECHnology of the Proterozoic Athabasca Basin, Saskatchewan and Alberta, Edited by Jefferson, C. W.; Delaney, G., Bulletin, Geological Survey of Canada, 588

Reyx, J.; Ruhlmann, F., 1993
Étude Métallographique des Différentes Associations Minérales et Caractérisation Chimique des Minéraux Uranifères du Gisement de Cigar Lake (Saskatchewan, Canada)
Canadian Journal of Earth Sciences, Volume 30, p. 705 - 719

Ruzicka, V. , 1984
Uranium Deposit Research, 1983
Current Research - Geological Survey of Canada, Volume 84-1A, p. 39 - 51

Saskatchewan Geological Survey, 2003
Geology, and Mineral and Petroleum Resources of Saskatchewan
Miscellaneous Report, Saskatchewan Industry and Resources, Publication code 2003-7, 173 p., 4 maps.

Saskatchewan Industry and Resources, 2001
Saskatchewan Mineral Deposits Index
Government of Saskatchewan, Geological Atlas of Saskatchewan, Internet

Thomas, D. J.; Mathews, R. B.; Sopuck, V., 2000
Athabasca Basin (Canada) - Unconformity-type Uranium Deposits: Exploration Model, Current Mine Development and Exploration Directions
In Geology and Ore Deposits 2000: the Great Basin and Beyond; May 15 - 18, 2000 Symposium Proceedings (CD-ROM), Edited by Cluer, J. K.; Price, J. G.; Struhsacker, E. M.; Hardyman, R. F.; Morris, C. L., Symposium Proceedings, Geological Society of Nevada, Geological Society of Nevada, Reno, Nevada, 647 p., p. 103 - 126

Production data: Report period: from 1991 until 1993; 166 metric ton ore; Provisional entry?: yes; Yearly or summary?: S
Grade-commodity information:U: 13.68 percent
weight-commodity information:U: 22.71 metric ton
Reference: Saskatchewan Geological Survey, 2003: Geology, and Mineral and Petroleum Resources of Saskatchewan; Miscellaneous Report, Saskatchewan Industry and Resources, Publication code 2003-7, 173 p., 4 maps.
Percent weights allocated to deposit: 0.0%
Resource data:
Disclaimer - Reserves/Resource Data

Her Majesty the Queen in Right of Canada, represented by the Minister of Natural Resources (NRCan) does not warrant or guarantee the accuracy, completeness or fitness for any purpose of Reserve and Resource information (Data) contained in this database, including whether the Data is compliant with any securities regulations or standards, and NRCan does not assume any liability with respect to any damage or loss incurred as a result of the use made of the Data.

Resource and reserve figures are historical in nature. The Data source provided with each set of figures should be cited if the Data are re-reported.

Estimate date: 2001; 0.895 million metric tons ore; Combined with production?: yes; Provisional entry?: no; Resource category: reasonably assured
Grade-commodity information:U: 15.05 percent
Reference: Saskatchewan Geological Survey, 2003: Geology, and Mineral and Petroleum Resources of Saskatchewan; Miscellaneous Report, Saskatchewan Industry and Resources, Publication code 2003-7, 173 p., 4 maps.
Percent weights allocated to deposit: 100.0%
Associated mine(s): Cigar Lake Uranium Mine (40021)

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