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


DEPNO COUNTRY LOCATION ALLNAMES COMMODITIES
40011 Canada (Saskatchewan) 58.20.57 N -- 103.50.11 W JEB Uranium Deposit; JEB Open Pit (part of the McClean Uranium Deposit) U; Ni

Database name: Uranium Deposits, Athabasca Basin
Custodial agency: Geological Survey of Canada
Compilers: Sunil S. Gandhi
Release date: 2007-03-02
   
Deposit name(s): JEB Uranium Deposit (occurrence name); JEB Open Pit (part of the McClean Uranium Deposit) (mine name)
Political location(s): Canada; Province or state: Saskatchewan; Nearest community: McClean North Deposit (10 km North)
NTS map data: 064L05 (Cunning Bay)
Deposit clan (type): Unconformity-associated
Deposit (sub) types: Unconformity-associated - Proterozoic - fracture-bound; polymetallic mineralization with clay alteration halo straddles the unconformity between graphitic metapelite and Athabasca sandstone, and is localized by NE and EW faults in ESE-trending metapelite; Reference: Saskatchewan Industry and Resources, 2001: Saskatchewan Mineral Deposits Index; Government of Saskatchewan, Geological Atlas of Saskatchewan, Internet
Deposit status: past producer; Size category: medium; Status comments: mined out by open pit during 1993-1997
Geologic province: Churchill - Hearne Craton
Geologic subprovince: Wollaston Domain (Fold Belt)
Geologic district: Eastern Athabasca Basin
Deposit object located: drillhole
Commodities: U; Ni
Mineralization styles: pitchblende nodules (mineralization zone); fracture-filling (mineralization zone); remobilized ore (mineralization zone); disseminated (mineralization zone); coatings (mineralization zone)
Geological ages: Early Mesoproterozoic - Middle Mesoproterozoic (mineralization)
Tectonic setting: continental marginal deformation zone-fold belt; convergent; Formal name: Wollaston Fold Belt (host rocks)
Coincident features: lithology (the host graphitic metapelite horizon trends east-southeast, and is vertical to steeply dipping to the southwest); Coincident feature name: graphitic schist
basement ridge (deposit immediately southwest of an Archean basement high due to post-Athabasca thrusting); Coincident feature name: Archean basement ridge
Regional tectonic structure: remobilized Archean granitic dome (ESE-trending host horizon reflects domal uplift 4 km to the south in the NE-trending fold belt) Tectonic structure name: Torwalt Granitoid Dome
Host rocks: (1) metamorphic; graphitic schist (graphitic metapelite); Depositional setting: platform-shelf; Metamorphic grade: amphibolite - upper
External host rock forms:schistose-gneissic metasediments
Host rock protoliths:pelite and semipelite (graphitic horizon in a semipelite-arkose formation); Host rock protolith name: unit of Wollaston Supergroup
Internal host rock structures:foliated to gneissic; schistose
Individual lithologies:graphitic metapelite (principal host unit of uranium mineralization at sub-Athabasca unconformity)

(2) metamorphic; paragneiss (migmatized metasemipelite meta-arkose); Metamorphic grade: amphibolite - upper
External host rock forms:schistose-gneissic metasediments
Host rock protoliths:semipelite (interbedded pelitic and arkosic beds; includes the host graphitic horizon); Host rock protolith name: unit of Wollaston Supergroup
arkose
Internal host rock structures:thin to and thick beds
Individual lithologies:metasemipelite (highly deformed and metamorphosed sequence)
meta-arkose
Host rock stratigraphy:Unit of Wollaston Supergroup Group

(3) sedimentary; sandstone-conglomerate (unconformably overlying crystalline basement); Metamorphic grade: unmetamorphosed
External host rock forms:thin to thick bedded, flat lying
Host rock protoliths:sandstone-pebbly sandstone-conglomerate (70 m thick sandstone above the unconformity at JEB deposit, and 20 m of overburden); Host rock protolith name: Bird Member, Manitou Falls Formation
Internal host rock structures:thin to thick bedded
Individual lithologies:quartz arenite (mainly coarse grained sandstone; clayey matrix)
conglomerate (minor)
Country rocks: (1) metasedimentary rocks; (folded and metamorphosed); Country rock name: Wollaston Group; Metamorphic grade: amphibolite (upper) - granulite
Country rock protoliths:semipelite and arkose (Late Paleoproterozoic platform-shelf sequnence on Archean Hearne craton); Country rock protolith name: Wollaston Group
Individual lithologies:metasemipelite and meta-arkose (includes graphitic metapelite horizons)

(2) conglomerate-sandstone; (flat-lying, undeformed); Country rock name: Athabasca Group; Metamorphic grade: unmetamorphosed
Country rock protoliths:quartz arenites (basal siliciclastic units of the Athabasca Group); Country rock protolith name: Athabasca Group
Individual lithologies:conglomerate-sandstone-siltstone (extensive sandstone, conglomerate and mudstones form >1.5 km thick lower Athabasca Group)
Metallogenic signatures: U-Ni-As
Alteration signatures: argillic alteration: sheared, red and green clay-rich metapelite; What was altered: host graphitic horizon; Component: mineralization zone
chlorite alteration: green coloration due to chlorite; What was altered: host graphitic horizon; Component: host rocks
hematization: red colouration due to hematite; What was altered: host graphitic horizon; Component: host rocks
chlorite alteration: 5 m thick zone; hematized and weakly mineralized; What was altered: basal Athabasca sandstone; Component: host rocks
hematization: red altered zone above the deposit; What was altered: basal Athabasca sandstone; Component: alteration halo
bleaching and limonitic alteration: zone around the lower hematitic alteration zone; What was altered: basal Athabasca sandstone; Component: alteration halo
silicification: outer silicified zone of alteration ; What was altered: basal Athabasca sandstone; Component: alteration halo
Mineralogy: (fracture fillings, coatings, disseminations / mineralization zone): pitchblende
(nodular ore / mineralization zone): pitchblende
(remobilized ore / mineralization zone): pitchblende, Ni arsenide
Deposit shape: elongate; Component: mineralization zone
Deposit dimensions:length: 122 metre
width: 50 metre
thickness: 17 metre
Qualified comments: (Applies to: discovery and development) Discovered in 1982; open pit started in 1993; mined out in 1997; bottom at 120 m; ore stockpiled for the McClean Project mill that started in 1999; ore grade mined: 2.79 % U; Uranium production: 2003 t. JEB open pit commissioned as two-stage natural surround tailings management facility, including tailings from the Sue ores; the first barrel of yellowcake from the JEB ore produced at JEB mill in 1999.
Links to other databases: SMDI; Key value: 1780
GSC U-Th File (Prasad); Key value: 9992
References:
Bennett, R. W., 2002
Geological Atlas of Saskatchewan, Version 5 (2002)
Government of Saskatchewan, CD-ROM

Landais, P.; Dereppe, J. M., 1985
A Chemical Study of the Carbonaceous Material from the Carswell Structure
In The Carswell Structure Uranium Deposits, Saskatchewan, Edited by Lainé, R.; Alonso, D.; Svab, M., Special Paper, Geological Association of Canada, Geological Association of Canada, 29, 230 p., p. 165 - 174

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

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

Saracoglu, N.; Wallis, R. H.; Brummer, J. J..; Golightly, J. P., 1983
Discovery of the McClean Uranium Deposits
Section Introductory Papers, In Uranium Exploration in Athabasca Basin, Edited by Cameron, E. M., Paper, Geological Survey of Canada, Geological Survey of Canada, 82-11, 310 p., 8 maps, p. 51 - 70

Saracoglu, N.; Wallis, R. H.; Brummer, J. J.; Golightly, J. P., 1985
The McClean Uranium Deposit, Northern Saskatchewan - Discovery
Chapter 2, Section Unconformity-type Deposits in Saskatchewan, 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. 85 - 100

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

Thomas, D. J.; Jefferson, C. W.; Card, C.; Yeo, G.; Sopuck, V., 2002
Introduction: the Eastern Athabasca Basin and its Uranium Deposits
Chapter 1, 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. 1 - 22

Thomas, M. W., 1982
Summary of Investigations 1982
Miscellaneous Report, Saskatchewan Geological Survey, Publication code 82-4

Wallis, R. H.; Saracoglu, N.; Brummer, J. J.; Golightly, J. P., 1883
Geology of the McClean Uranium Deposits
Section Introductory Papers, In Uranium Exploration in Athabasca Basin, Edited by Cameron, E. M., Paper, Geological Survey of Canada, Geological Survey of Canada, 82-11, 310 p., 8 maps, p. 71 - 110

Wallis, R. H.; Saracoglu, N.; Brummer, J. J.; Golightly, J. P., 1985
The Geology of the McClean Uranium Deposits, Northern Saskatchewan
Chapter 2, Section Unconformity-type Deposits in Saskatchewan, 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. 101 - 131

Wallis, R. H.; Saracoglu, N.; Brummer, J. J.; Golightly, J. P., 1986
The Geology of the McClean Uranium Deposits, Northern Saskatchewan
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. 193 - 217

Production data: Report period: from 1995 until 1997; 71,850 metric ton ore; Provisional entry?: yes; Yearly or summary?: S
Grade-commodity information:U: 2.79 percent
weight-commodity information:U: 2,003 metric ton
Reference: Tourigny, G.; Wilson, S.; Breton, G.; Portella, P., 2002: Geology of the Sue C Uranium Deposit, McClean Lake Area, Northern Saskatchewan; Chapter 3, 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. 35 - 51
Percent weights allocated to deposit: 0.0%
Associated mine(s): JEB Open Pit (40010)

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