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


DEPNO COUNTRY LOCATION ALLNAMES COMMODITIES
40034 Canada (Saskatchewan) 58.13.46 N -- 109.31.07 W Anne Zone; Shea Creek Anne Zone; Anne North and South Zones U

Database name: Uranium Deposits, Athabasca Basin
Custodial agency: Geological Survey of Canada
Compilers: Sunil S. Gandhi
Release date: 2007-03-02
   
Deposit name(s): Anne Zone (occurrence name); Shea Creek Anne Zone (occurrence name); Anne North and South Zones (occurrence name)
Political location(s): Canada; Province or state: Saskatchewan; Nearest community: Cluff Lake Mine-Mill Complex (15 km South)
NTS map data: 074K04 (Larter Creek)
Deposit clan (type): Unconformity-associated
Deposit (sub) types: Unconformity-associated - Proterozoic - clay-bound; localized at a reverse fault intersecting sub-Athabasca unconformity above a basement graphitic zone trending NNW; altered sandstone host hydrothermally brecciated due to silica removal and collapse; Reference: Koch, R. R.; Dalidowicz, F., 1996: Shea Creek - A Deep Geophysical Exploration Discovery; C, Section Uranium Deposit Studies and Exploration Techniques, In Advances in Saskatchewan Geology and Mineral Exploration: Proceedings of a Symposium held in Saskatoon, November 21 and 22, 1996 (MinExpo '96 Symposium), Edited by Ashton, K. E.; Harper, C. T., Special Publication, Saskatchewan Geological Society, Saskatchewan Geological Society, 14, 163 p., p. 96 - 108
Deposit status: showing; Size category: unknown
Geologic province: Churchill - Rae Craton
Geologic subprovince: Taltson-Thelon Magmatic Zone
Geologic district: Western Athabasca Basin / Western Lloyd Domain
Deposit object located: drill hole
Commodities: U
Mineralization styles: massive bodies at unconformity; dissemination above unconformity; dissemination below unconformity
Geological ages: Late Paleoproterozoic - Middle Mesoproterozoic (host rocks)
Middle Mesoproterozoic - Late Mesoproterozoic (mineralization)
Tectonic setting: continental basin-intracratonic; stable; Formal name: Athabasca Basin (host rocks)
Coincident features: thrust fault/fault zone (the thrust and related faults in the graphitic schists and the sandstones focussed mixing of diagenetic and hydrothermal solutions at the unconformity); Coincident feature name: Post-Athabasca Thrust Fault
Regional tectonic structure: graphitic metapelite zone (an EM conductor in the sub-Athabsca basement; trend 330°; comparable with parts of the Peter River Gneiss in the Carswell structure 20 km to the north) Tectonic structure name: Saskatoon Lake Conductor Zone
thrust fault (east dipping thrust or reverse fault with diplacement of unconformity a few tens of metres to the west; hydrothermal brecciation in sandstone above) Tectonic structure name: Shea Creek Thrust Fault
Host rocks: (1) metamorphic; metasedimentary schist (graphitic; partly migmatized); Depositional setting: platform-shelf; Metamorphic grade: amphibolite (upper) - granulite
External host rock forms:schistose-gneissic metasediments
Host rock protoliths:pelite and semipelite (graphitic; part of a Paleoproterozoic sequence deposited on Archean craton margin); Host rock protolith name: Peter River Gneiss
Internal host rock structures:foliated to gneissic; schistose
Individual lithologies:graphite schist (lithologically comparable with the Peter River Gneiss in the Carswell circular structure 15 m to the north)

(2) surficial; laterite (hematitic and chloritic weathering profile developed on crystalline basement); Host series: paleoregolith; Depositional setting: subaerial; Metamorphic grade: unmetamorphosed
External host rock forms:lateritic profile
Host rock protoliths:metapelite and metasemipelite (paleoweathering extends relatively deeper in graphitic metapelites and along fault zones); Host rock protolith name: sub-Athabasca basement
Internal host rock structures:lateritic zonation
Individual lithologies:laterite (typical hematitic upper part, grading down into green chloritic alteration)

(3) sedimentary; sandstone-conglomerate (basal beds mineralized); Depositional setting: fluviatile; Metamorphic grade: unmetamorphosed
External host rock forms:thin to thick bedded, flat lying
Host rock protoliths:sandstone-pebbly sandstone-conglomerate (sandstone-dominated, 97 m thick, lowermost unit of the Athabasca Group in the Shea Creek-Douglas River transect; defined by sequence stratigraphy); Host rock protolith name: Shea Creek Sequence
Internal host rock structures:well sorted flat- and cross-bedded sandstones
Individual lithologies:sandstone (basal coarse sandstone and pebble conglomerate beds may be Fair Point Formation; the rest is mainly medium grained; hosts the Anne and Collette zones)

(4) sedimentary; sandstone-siltstone (strata above the Shea Creek sequence; 600 m thick); Metamorphic grade: unmetamorphosed
External host rock forms:thin to thick bedded
Host rock protoliths:sandstone-siltstone-shale (the 7.5 km long Shea Creek transect of 13 drill holes includes 5 sequences: the Lower and Upper Manitou Falls, Lazenby, Wolverine and Locker Lake); Host rock protolith name: Athabasca Group
Internal host rock structures:medium to fine grained
Individual lithologies:sandstone (the sequences based on the type and frequency of primary sedimentary structures; show alterations and trace element halos related to mineralization)
conglomerate (the sequences based on the type and frequency of primary sedimentary structures; show alterations and trace element halos related to mineralization)
mudstone (the sequences based on the type and frequency of primary sedimentary structures; show alterations and trace element halos related to mineralization)
Metallogenic signatures: U
Alteration signatures: chlorite alteration: sudoite, minor hydrothermal illite; What was altered: paleoweathered basment gneisses
illite alteration: hydrothermal fibrous illite replaces bladed illite; What was altered: sandstones with authigenic illite and kaolinite
tourmalinization: dravite, with hydrothermal illite; What was altered: authigenic matrix of sandstone
Mineralogy: (alteration / alteration halo): illite - 1Mc, illite - 1Mt, sudoite, kaolinite, dravite
(alteration / mineralization zone): carbon matter globules
(alteration / alteration halo): kaolinite - Fe-rich, quartz - secondary
(gangue minerals / mineralization zone): pyrite
(gangue minerals / massive mineralization): carbon
(massive ore / mineralization zone): uraninite, pitchblende
(mineralized carbon matter / main mineralization zone): uranium oxide-bearing carbon globules
Radiometric ages: Object dated: Alteration Signature(2); Age - Ma: 1,400; -250; Dating method: K-Ar; Concentrate: illite; Source rock: altered sandstones and basement; Formal name: hydrothermal illites; Event dated: alteration (hypogene); Interpretive comment: 10 basement and 10 sandstone samples from mineralized zones; age range similar to that for U-Pb ages; Reference: Laverret, E.; Patrier, P.; Clauer, N.; Bruneton, P.; Mondy, J.; Beaufort, D., 2003: Time-Space Evolution of Alterations in Unconformity Type Uranium Deposit of the Shea Creek Prospect (Athabasca Basin, Canada); 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. 211 - 214

Object dated: Host Rocks(4); Age - Ma: 1,400; -1,170; Dating method: K-Ar; Concentrate: illite; Source rock: sandstones near and far from mineralization; Formal name: diagenetic illites; Event dated: barren sandstones; Interpretive comment: 8 samples proximal to mineralization are in 1365 ± 30 Ma range; 4 distal ones in 1215 ± 30 Ma range; Reference: Laverret, E.; Patrier, P.; Clauer, N.; Bruneton, P.; Mondy, J.; Beaufort, D., 2003: Time-Space Evolution of Alterations in Unconformity Type Uranium Deposit of the Shea Creek Prospect (Athabasca Basin, Canada); 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. 211 - 214
Deposit shape: elongate pod
Deposit dimensions:long axis: 500 metre
width: 100 metre
thickness: 10 metre
Qualified comments: (Applies to: discovery and development) This deposit was discovered in 1992 at sub-Athabasca unconformity 705 m below the surface by drill testing of the 10 km long Saskatoon Lake EM conductor, which trends 330°. The test revealed 0.62 % eU over 0.7 m in the discovery hole. The main Anne zone is 500 m long, has variable width up to 125 m and thickness of a few metres to a few tens of metres. The Collette zone located on the same conductor 1.5 km to the NW may be as large.
References:
Card, C., 2002
New Investgations of the Basement to the Western Athabasca Basin
D, Section EXTECH IV Athabasca Uranium, In Summary of Investigations 2002, Volume 2, Saskatchewan Geological Survey (CD-ROM), Edited by Anonymous, Miscellaneous Report, Saskatchewan Geological Survey, Saskatchewan Industry and Resources, 2002-4.2, 371 p., 1 disks, p. 283 - 299

Carroll, J.; Robbins, J.; Koning, E., 2006
The Shea Creek Deposits, West Athabasca Basin, Saskatchewan
In Field Trip 3: Cluff Lake and Shea Creek Deposits; September 13-14; 2006 CIM Field Conference; Uranium: Athabasca Deposits and Analogues, Edited by Koning, E.; Robbins, J.; Carroll, J., Field Trip Guidebook, Canadian Institute of Mining and Metallurgy, CIM Geogolical Society, Saskatoon Section, 48 p., p. 33 - 48

Collier, B., 2002
Detailed Stratigraphy and Facies Analysis of the Paleoproterozoic Athabasca Group along the Shea Creek-Douglas River Transect, Northern Saskatchewan
D, Section EXTECH IV Athabasca Uranium, In Summary of Investigations 2002, Volume 2, Saskatchewan Geological Survey (CD-ROM), Edited by Anonymous, Miscellaneous Report, Saskatchewan Geological Survey, Saskatchewan Industry and Resources, 2002-4.2, 371 p., 1 disks, p. 259 - 274

Cuney, M. L.; Chabiron, A.; Kister, P.; Golubev, V.; Deloule, E., 2002
Chemical vs Ion MicroprobeIsotopic Dating (CAMECA IMS 3F) of the Shea Creek Unconformity Type Uranium Deposit (West Athabasca, Saskatchewan, Canada)
In Program with Abstracts: Saskatoon 2002, Edited by Anonymous, Program and Abstracts' Volume for Annual Meeting, Geological Association of Canada-Mineralogical Association of Canada, 27

Hecht, L.; Cuney, M., 2003
Tracing the Sources of Unconformity-type Uranium Deposits
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. 177 - 180

Kister, P.; Cuney, M.; Royer, J. J., 2002
Geochemical Modelling of Unconformity-type Uranium Deposits: Application to the Shea Creek Deposit, Western Athabasca Basin (Saskatchewan, Canada)
In Program with Abstracts: Saskatoon 2002, Edited by Anonymous, Program and Abstracts' Volume for Annual Meeting, Geological Association of Canada-Mineralogical Association of Canada, 27

Kister, P.; Laverret, E.; Cuney, M.; Vieillard, P.; Quirt, D., 2003
3D Distribution of Alteration Minerals Associated with Unconformity-type Uranium Mineralization: Anne Zone, Shea Creek Deposit (Saskatchewan, Canada)
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. 197 - 200

Koch, R. R.; Dalidowicz, F., 1996
Shea Creek - A Deep Geophysical Exploration Discovery
C, Section Uranium Deposit Studies and Exploration Techniques, In Advances in Saskatchewan Geology and Mineral Exploration: Proceedings of a Symposium held in Saskatoon, November 21 and 22, 1996 (MinExpo '96 Symposium), Edited by Ashton, K. E.; Harper, C. T., Special Publication, Saskatchewan Geological Society, Saskatchewan Geological Society, 14, 163 p., p. 96 - 108

Laverret, E.; Patrier, P.; Clauer, N.; Bruneton, P.; Mondy, J.; Beaufort, D., 2003
Time-Space Evolution of Alterations in Unconformity Type Uranium Deposit of the Shea Creek Prospect (Athabasca Basin, Canada)
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. 211 - 214

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

Nimeck, G.; Koch, 2006
Case History with Integrated Methods at Shea Creek, Western Athabasca
B, Section Exploration Methods and Applications, 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 - 1

Robbins, J.; Koning, E., 2006
Shea Creek Deposits, West Athabasca Basin, Saskatchewan, Canada
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 - 9

Sangely, L.; Michels, R.; Chaussidon, M.; Brouand, M.; Cuney, M.; Richard, L.; Huault, V., 2003
Origin of Carbonaceous Matter in Unconformity-type Uranium Ore-deposit of Saskatchewan (Canada): Clues to an Abiogenic Synthesis
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. 323 - 326

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

Associated group(s): Shea Creek Zone (40003)

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