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


DEPNO COUNTRY LOCATION ALLNAMES COMMODITIES
40005 Canada (Saskatchewan) 58.09.28 N -- 103.44.18 W Horseshoe Uranium Deposit 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): Horseshoe Uranium Deposit
Political location(s): Canada; Province or state: Saskatchewan; Nearest community: Rabbit Lake mine-mill complex (5.5 km SSW)
NTS map data: 064L04 (Hidden Bay)
Deposit clan (type): Unconformity-associated
Deposit (sub) types: Unconformity-associated - Proterozoic - fracture-bound; structure controlled deposit apparently linked to Raven deposit 800 m SW along strike; some low grade zones occur in between; Reference: Tremblay, L. P., 1982: Geology of the Uranium Deposits Related to the Sub-Athabasca Unconformity; Paper, Geological Survey of Canada, Publication code 81-20, 56 p..
Deposit status: advanced prospect; Size category: medium; Status comments: open pittable but low grade deposit, hence not yet developed
Geologic province: Churchill - Hearne Craton
Geologic subprovince: Wollaston Domain (Fold Belt)
Geologic district: Eastern Athabasca Basin
Deposit object located: outcrop
Commodities: U
Mineralization styles: fracture fill (mineralization zone)
Geological ages: Mesoproterozoic
Coincident features: fracture(s)
Host rocks: (1) metamorphic; metasedimentary schist (quartzitic unit with graphitic beds); Depositional setting: platform-shelf; Metamorphic grade: amphibolite (upper) - granulite
External host rock forms:thin to thick bedded
Host rock protoliths:arkosic sandstone, pelite, carbonate (includes amphibolite, graphitic metapelite, phosphates and sillimanite quartzite); Host rock protolith name: upper unit of Wollaston Supergroup
Internal host rock structures:foliated to gneissic; schistose
Individual lithologies:meta-arkose (includes amphibolite, graphitic metapelite, phosphates and sillimanite quartzite)
metapelite (includes graphitic metapelite)
calc-silicate
amphibolite
sillimanite schist (aluminour quartzite or quartz-rich meta-arkose)
quartzite
Host rock stratigraphy:Wollaston Supergroup
Country rocks: (1) metasedimentary rocks; (folded and metamorphosed); Country rock name: upper unit of Wollaston Group; Metamorphic grade: amphibolite (upper) - granulite
Country rock protoliths:quartz arenite, arkose, pelites, carbonates (stratigraphically 1000 m above the host strata of the Rabbit Lake deposit to the west); Country rock protolith name: upper unit of Wollaston Group
Individual lithologies:quartz-biotite gneisses and calc-si (includes amphibolite, graphitic metapelite, phosphates and sillimanite quartzite)

(2) conglomerate-sandstone; (flat-lying, undeformed); Country rock name: Athabasca Group; Metamorphic grade: unmetamorphosed
Country rock protoliths:sandstone-pebbly sandstone-conglomerate (eroded at the deposit; present eastern edge of Athabasca Group 3.5 km west of the deposit); Country rock protolith name: Manitou Falls Fm. of Athabasca Group
Individual lithologies:conglomerate and pebbly sandstone (covered the deposit during the middle Mesoproterozoic tome when initial minralization most likely occurred)
Metallogenic signatures: U-Cu
Alteration signatures: sericitization: sericite; What was altered: feldspar
chlorite alteration: green coloration due to chlorite; What was altered: mafic minerals
argillic alteration: illite and/or kaolinite; soft, white, porous aggre; What was altered: host metasediments
hematization: disseminated fine hematite; red colouration; What was altered: host metasediments
Mineralogy: (veins and disseminations): pitchblende - massive, pitchblende - sooty, uranophane, pyrite, chalcopyrite, bornite, chalcocite, copper
Radiometric ages: Object dated: Mineralogy(1); Age - Ma: 275; +25; -25; Dating method: U-Pb; Concentrate: pitchblende; Source rock: vein; Event dated: mineralization, remobilized; Interpretive comment: sample depth 180 m; Raven or Horseshoe deposit; age indicates Pb loss after erosion of cover strata; Reference: 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
Deposit shape: cigar-shaped
Deposit dimensions:length: 900 metre
width: 120 metre
thickness: 150 metre
Qualified comments: (Applies to: discovery and development) Discovered in 1974; located 61 to 351 m below surface; drill indicated resources reported in 1989: 1550 t U in 1.107 Mt of ore averaging 0.14 % U; deposit deep-seated and low grade, hence not developed. After discovery of Raven deposit in 1972, systematic drilling of its alteration zone revealed Horseshoe deposit 800 m to the northeast; 60 of the 73 holes drilled by 1975 intersected mineralization.
Links to other databases: SMDI; Key value: 1722
GSC U-Th File (Prasad); Key value: 2659
References:
Bennett, R. W., 2002
Geological Atlas of Saskatchewan, Version 5 (2002)
Government of Saskatchewan, CD-ROM

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

Rhys, D. A., 2002
Geological Report on the Hidden Bay Property, Wollaston Lake Area, Northern Saskatchewan
Report to UEX Corporation, Vancouver, B. C., Panterra Geoservices Inc., Surrey, B. C., Canadian Securities Commission website (www.sedar.com), 89 p..

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

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

Sibbald, T. I. I., 1983
Geology of the Crystalline Basement, NEA/IAEA Athabasca Test Area
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. 1 - 14

Tremblay, L. P., 1982
Geology of the Uranium Deposits Related to the Sub-Athabasca Unconformity
Paper, Geological Survey of Canada, Publication code 81-20, 56 p..

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: 2002; 3.617 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: indicated resource
Grade-commodity information:U: 0.1441 percent
Cutoff grade-commodity:U: 0.03 percent
weight-commodity information:U: 5,215 metric ton
Reference: Rhys, D. A., 2002: Geological Report on the Hidden Bay Property, Wollaston Lake Area, Northern Saskatchewan; Report to UEX Corporation, Vancouver, B. C., Panterra Geoservices Inc., Surrey, B. C., Canadian Securities Commission website (www.sedar.com), 89 p..
Percent weights allocated to deposit: 100.0%

Generated 2007-03-02 2:36:19 PM with GQuery -- 3.7 ADO (3.19/3.20/3.21 -- 2006-02-24)
GlobalDB System, Geological Survey of Canada, Natural Resources Canada