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


DEPNO COUNTRY LOCATION ALLNAMES COMMODITIES
40007 Canada (Saskatchewan) 58.17.45 N -- 103.36.16 W Eagle Point South Uranium Deposit; Eagle Point Uranium Mine U; Cu; Pb

Database name: Uranium Deposits, Athabasca Basin
Custodial agency: Geological Survey of Canada
Compilers: Sunil S. Gandhi
Release date: 2007-03-02
   
Deposit name(s): Eagle Point South Uranium Deposit; Eagle Point Uranium Mine
Political location(s): Canada; Province or state: Saskatchewan; Nearest community: Rabbit Lake mine-mill complex (11 km Northeast)
NTS map data: 064L05 (Cunning Bay)
Deposit clan (type): Unconformity-associated
Deposit (sub) types: Unconformity-associated - Proterozoic - fracture-bound; metasediment-hosted lenses, 100 to 400 m below surface where Athabasca cover strata are eroded; mineralization in faults and related breccias at junction of the Collins Bay and Eagle Point thrusts; Reference: Andrade, N., 1989: The Eagle Point Uranium Deposits, Northern Saskatchewan, Canada; 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. 455 - 490
Deposit status: producer; Size category: large; Status comments: recent intensive exploration has extended the life of the mine, which was slated to end in 2005
Geologic province: Churchill - Hearne Craton
Geologic subprovince: Wollaston Domain (Fold Belt)
Geologic district: Eastern Athabasca Basin
Deposit object located: drillhole
Commodities: U; Cu; Pb
Mineralization styles: fracture-filling and dissemination; breccia - matrix
Geological ages: Early Mesoproterozoic - Middle Mesoproterozoic (mineralization)
Tectonic setting: continental marginal deformation zone-fold belt; convergent; Formal name: Wollaston Fold Belt (Domain) (country rocks)
continental marginal granitoid dome-basement reactivation; convergent; Formal name: Collins Bay granitoid dome (country rocks)
continental basin-intracratonic; stable; Formal name: Athabasca Basin (country rocks)
continental fault zone-reverse faulting; transpressive; Formal name: Collins Bay-Eagle Point Fault Zone (mineralization)
Coincident features: fault(s) (Collins Bay fault zone is close to the NE-trending boundary of granite gneiss dome and basal strata of Hidden Bay Assemblage that form a monocline); Coincident feature name: Collins Bay Fault
anastomosing fault and breccia zone (faults and breccias in lower graphitic horizon and pegmatoid unit above, within 70 m of stratigraphic thickness in hanging wall of Collins Bay fault); Coincident feature name: Collins Bay Fault
lithology (two largest of 5 zones of this deposit are concordant lenses within sheared and faulted pegmatoid rock); Coincident feature name: Pegmatoid unit
lithology (this NE-trending unit appears to have acted as an aquitard to mineralizing solutions for the high grade Sump/163, and Northern 01, 02 and 03 zones); Coincident feature name: Quartzite Unit
Regional tectonic structure: deformed foreland of Trans-Hudson orogen (metasediments in NE-trending regional thermo-tectonic zone; partially covered by undeformed siliciclastic strata of intracrtonic Athabasca basin) Tectonic structure name: Wollaston fold belt
brittle reverse fault zone (Collins Bay fault is a regional thrust zone and dips moderately to SE; the parallel Eagle Point fault is 60 m to the east) Tectonic structure name: Collins Bay-Eagle Point Fault Zone
Host rocks: (1) metamorphic; metasedimentary schist (metapelites-quartzite-calc-silicates); Depositional setting: platform-shelf; Metamorphic grade: amphibolite (upper) - granulite
External host rock forms:schistose-gneissic metasediments
Host rock protoliths:pelites, psammites and carbonates (a 450 m thick sequence of the late Paleoproterozoic age hosts the Eagle Point deposits); Host rock protolith name: part of Lower Wollaston Supergroup
Internal host rock structures:well foliated to gneissic and schistose
Individual lithologies:biotite-quartz-feldspar gneiss (dominant rock type in the deposit area; comprises 30 to 40 % of the host sequence)

(2) metamorphic; migmatite (anatectic and younger pegmatites); Depositional setting: platform-shelf; Metamorphic grade: amphibolite (upper) - granulite
External host rock forms:thin discontinuous zones and thicker dykes
Host rock protoliths:metasedimentary rocks (quartzo-feldspathic constituents of the host metasedimentary sequence; remobilized during Hudsonian thermo-tectonic event); Host rock protolith name: part of Lower Wollaston Supergroup
Internal host rock structures:coarse grained, pegmatitic
Individual lithologies:pegmatite (forms 15 to 20 % of the host sequence; composition varies with source metasediments; commonly myrmekitic; may contain tourmaline, garnet, sillimanite )
anatectic gneiss
Country rocks: (1) granitic gneisses; (reactivated Archean granites); Country rock name: Collins Bay Granitoid Dome; Metamorphic grade: amphibolite (upper) - granulite
Country rock protoliths:granitic plutons (granite to granodiorite pluton(s) in the Archean basement of the Wollaston Group remobilized during the Hudsonian orogeny ca. 1820-1790 Ma); Country rock protolith name: Collins Bay Granitoid Dome
Individual lithologies:granitic gneiss (granite-granodiorite; foliated to varying degree; medium to coarse; equigranular to porphyritic)

(2) metasedimentary rocks; (folded and metamorphosed); Country rock name: Lower Wollaston Group; Metamorphic grade: amphibolite (upper) - granulite
Country rock protoliths:pelites, psammites and carbonates (foreland basin fill of the Trans-Hudson orogen); Country rock protolith name: units of Lower Wollaston Group
Individual lithologies:quartz-biotite gneisses and calc-si (quartz-biotite gneiss with subconformable quartzo-feldspathic and calc-silicate layers and lenses)

(3) 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; deposited in fluvial environment over nearly peneplaned basement affected by lateritic weathering); Country rock protolith name: Manitou Falls Formation
Individual lithologies:quartzose sandstone and gritstones (minor clay and silica matrix; mostly eroded from the hanging wall of Collins Bay fault)
Metallogenic signatures: U
Alteration signatures: lateritic alteration: upper oxidized zone; lower reduced zone; What was altered: sub-Athabasca basement
diagenetic alteration: muscovite/illite and Mg chlorite; What was altered: Athabasca Group and basement
illite alteration: illite, dominant in and around high grade ore; What was altered: feldspar; Component: mineralization
chlorite alteration: chlorite; associated with illite; What was altered: mafic silicates; Component: mineralization
hematization: hematization, late stage ; What was altered: host rocks; Component: mineralization
silicification: quartz, replacive and open space fillings; What was altered: siliceous rocks and breccias; Component: mineralization
Mineralogy: (fracture fillings, coatings, disseminations): pitchblende, coffinite, boltwoodite, pyrite, galena, chalcopyrite
(irregular aggregation): uraninite I, uraninite II
(oriented inclusions in biotite): pitchblende
(veins and stringers): pitchblende
(veins, globules, replacement): copper
Radiometric ages: Object dated: Mineralogy(1); Age - Ma: 1,400; +25; -25; Dating method: U-Pb; Concentrate: uraninite; Source rock: uranium ore (high grade); Formal name: older uraninite; Event dated: mineralization (early); Interpretive comment: two generations of uraninite dated at 1000 to 1400 Ma; the older uraninite is probably 1400 ± 25 Ma; Reference: Andrade, N., 1989: The Eagle Point Uranium Deposits, Northern Saskatchewan, Canada; 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. 455 - 490

Object dated: Mineralogy(2); Age - Ma: 1,400; -400; Dating method: U-Pb; Concentrate: uraninite; Source rock: uranium ore (high grade); Formal name: younger uraninite; Event dated: mineralization (early); Interpretive comment: the age range reflects derivation of uraninite II from uraninite I by partial to complete oxidation ; Reference: Andrade, N., 1989: The Eagle Point Uranium Deposits, Northern Saskatchewan, Canada; 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. 455 - 490

Object dated: Mineralogy(4); Age - Ma: 700; -200; Dating method: U-Pb; Concentrate: pitchblende; Source rock: uranium ore; Formal name: early pitchblende formation; Event dated: mineralization, remobilized; Interpretive comment: the pitchblende veins and stringers crosscut two generations of uraninite; indicate remobilization; Reference: Andrade, N., 1989: The Eagle Point Uranium Deposits, Northern Saskatchewan, Canada; 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. 455 - 490

Object dated: Mineralogy(5); Age - Ma: 20; -15; Dating method: U-Pb; Concentrate: pitchblende; Source rock: mineralization; Formal name: late pitchblende formation; Event dated: mineralization, remobilized; Interpretive comment: 20 to 5 Ma age range indicative of solution and redeposition of uranium or lead loss in open system; Reference: Andrade, N., 1989: The Eagle Point Uranium Deposits, Northern Saskatchewan, Canada; 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. 455 - 490

Object dated: Mineralogy(5); Age - Ma: 200; -190; Dating method: U-Pb; Concentrate: pitchblende; Source rock: uranium ore; Formal name: uranium remobilization event; Event dated: mineralization, remobilized; Interpretive comment: three samples analyzed gave very discordant data and very young ages; evidently young pitchblendes; 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
Deposit shape: zone of concordant lenses
Deposit dimensions:height: 300 metre
width: 40 metre
length: 400 metre
Qualified comments: (Applies to: discovery and development) The deposit was discovered in 1980 and drilled until 1986: 284 holes totalling 66259 m. It comprises 2 main lenses, namely the 144 and Sump/163 Zones, and 3 small ones. Reserves as of 1989: 28850 t U in 2050 kt of ore averaging 1.39 % U at 0.42 % cut-off. North and South deposits (main lenses) were mined from a decline during 1991-1999; mining resumed in 2002; combined reserves as of 1990: 51150 t U in 3317 kt of ore averaging 1.542 % U; mill feed by 2001:1612 kt ore.
Links to other databases: SMDI; Key value: 1715
SMDI; Key value: 1715b
GSC U-Th File (Prasad); Key value: 9799
References:
Andrade, N., 1989
The Eagle Point Uranium Deposits, Northern Saskatchewan, Canada
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. 455 - 490

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

Gandhi, S. S., 1995
An Overview of the Exploration History and Genesis of Proterozoic Uranium Deposits in the Canadian Shield
Exploration and Research for Atomic Minerals, Department of Atomic Energy, India, Volume 8, p. 1 - 48

Marmont, S., 1988
Unconformity-type Uranium Deposits
In Ore Deposit Models, Edited by Roberts, R. G.; Sheahan, P. A., Geoscience Canada Reprint Series, Geological Association of Canada, Geological Association of Canada, 3, p. 103 - 115

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

Ruzicka, V., 1984
Unconformity-related Uranium Deposits in the Athabasca Basin Region, Saskatchewan
Section Unconformity-related Types, In Proterozoic Unconformity and Stratabound Uranium Deposits, Edited by Ferguson, J., TECDOC, International Atomic Energy Agency, Vienna, International Atomic Energy Agency, Vienna, Austria, 315, 338 p., p. 217 - 267

Ruzicka, V., 1986
Uranium Deposits in the Rabbit Lake - Collins Bay Area, 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. 144 - 154

Ruzicka, V., 1993
Unconformity-type Uranium Deposits
Section Models for Sediment-hosted and Volcanic-related Deposits, In Mineral Deposit Modeling, Edited by Kirkham, R. V.; Sinclair, W. D.; Thorpe, R. I.; Duke, J. M., Special Paper, Geological Association of Canada, Geological Association of Canada, 40, 798 p., p. 125 - 149

Ruzicka, V., 1996
Unconformity-associated Uranium
In Geology of Canadian Mineral Deposit Types, Edited by Eckstrand, O. R.; Sinclair, W. D.; Thorpe, R. I., Geology of Canada, Decade of North American Geology (DNAG), Geological Survey of Canada, Geological Society of America, Geological Survey of Canada, Geological Society of America, Volume 8, 640 p., p. 197 - 210

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

Sopuck, V. J.; de Carle, A.; Wray, E. M.; Cooper, B., 1983
Application of Lithogeochemistry to the Search for Unconformity-type Uranium deposits in the Athabasca Basin
Section Detailed Studies, 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. 191 - 205

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

Ward, D. M., 1989
Rabbit Lake Project - History of Exploration and General Geology
Bulletin of the Canadian Institute of Mining and Metallurgy, Volume 82, p. 40 - 48

Production data: Report period: from 1993 until 1999; 2.05 million metric tons ore; Provisional entry?: yes; Yearly or summary?: S
Grade-commodity information:U: 1.39 percent
weight-commodity information:U: 28,850 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: 1999; 2.05 million metric tons ore; Combined with production?: yes; Provisional entry?: yes; Resource category: measured resource
Grade-commodity information:U: 1.39 percent
Reference: 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
Percent weights allocated to deposit: 100.0%
Associated mine(s): Eagle Point South Uranium Mine (40005)

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