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Scale 1:20 000 This Map Location Map River Ena Lake ATHABASCA Davy Lake Beaverlodge Lake Tazin Lake Richards Lake Engler Lake Helmer Squirrel Lake Oldman Lake Nicholson Nevins Lake Lake Forsyth Lake Riou Lake Lake Thicke Lake Box Oman Lake Lake Picea Fontain Lake La 74N-01 74N-08 74N-09 74O-04 74O-03 74O-02 74O-05 74O-06 74O-07 74O-12 74O-11 74O-10 74O-15 74O-14 74O-13 74N-16 74K-16 74J-13 74J-14 74J-15 74N-10 74O-01 74O-08 74O-09 74N-07 74N-15 74O-16 74N-02 74J-16 74K-15 -108° -108° -107° -107° 59° 59° 60° Uranium City Although the Department of Industry and Resources has exercised all reasonable care in the compilation, interpretation, and production of this item, it is not possible to ensure total accuracy, and all persons who rely on the information contained herei n do so at their own risk. The Department of Industry and Resources and the Government of Saskatchewan do not accept liability for any errors, omissions, or inaccuracies that may be included in or derived from, this item. Legend 89 63 54 26 85 88 69 85 86 86 84 84 80 80 81 80 75 69 74 85 75 76 65 78 78 90 85 54 88 85 56 78 80 68 67 63 70 65 64 34 43 43 56 59 64 48 69 61 53 61 46 76 74 77 46 25 48 36 34 20 38 36 25 49 37 65 64 15 51 43 44 60 63 51 15 45 44 30 40 32 25 37 70 40 29 12 56 53 52 47 62 32 58 58 62 28 46 60 16 37 48 12 74 29 66 72 63 52 42 42 42 38 42 53 40 80 85 80 80 75 39 80 80 62 67 63 60 76 65 72 85 47 56 70 70 0 65 80 45 78 69 70 50 54 68 57 55 47 50 55 50 54 70 68 70 82 60 67 62 77 58 42 57 37 71 60 71 82 89 89 88 62 84 78 63 75 75 65 70 37 58 70 53 44 44 60 63 68 69 52 75 40 72 60 58 68 61 63 58 68 70 66 50 58 66 41 50 73 83 68 26 48 66 68 59 54 69 71 54 43 68 66 50 75 55 72 50 77 76 47 29 29 66 70 58 54 45 76 86 72 72 79 71 61 53 54 52 79 73 67 75 62 74 78 43 72 62 62 79 59 75 71 50 81 82 77 73 77 67 78 57 77 57 81 7 76 58 45 73 65 69 67 70 82 75 73 83 71 68 63 79 65 68 56 80 44 77 74 77 55 68 41 72 68 75 71 66 44 67 84 85 47 67 72 84 63 78 46 86 54 74 68 82 86 73 71 66 78 69 83 67 70 74 73 67 77 84 79 63 77 81 83 73 63 78 76 63 81 45 44 77 67 77 75 68 71 70 67 73 77 66 73 87 64 52 43 42 64 64 58 78 46 72 53 53 48 67 70 64 65 82 76 65 77 67 80 83 76 78 64 71 74 64 62 64 73 64 68 59 54 56 74 48 53 67 59 76 71 42 66 76 61 76 71 68 71 54 68 73 74 68 76 78 67 62 68 72 53 69 69 54 70 56 81 73 79 64 64 76 61 63 52 54 57 55 58 57 68 57 54 69 73 54 47 53 74 48 64 61 67 64 74 67 74 79 54 48 54 49 39 40 68 65 64 65 68 66 68 54 63 49 60 78 61 74 64 72 70 67 87 80 76 64 73 69 72 72 57 67 74 78 49 69 63 43 73 46 57 64 77 61 56 42 68 63 5 61 71 57 58 52 59 74 75 72 70 67 73 56 80 85 83 40 35 43 52 48 37 44 53 60 85 57 45 49 70 66 45 55 33 48 68 53 47 76 54 80 75 75 75 50 60 54 48 72 8 69 80 77 80 80 75 80 80 70 80 85 75 67 57 63 52 80 50 55 75 60 63 70 70 52 80 60 75 60 60 32 25 32 25 20 36 60 40 75 57 70 80 75 80 35 60 80 65 37 66 20 48 25 40 35 36 45 48 48 70 72 76 70 30 48 48 65 70 68 60 79 85 75 77 65 40 70 58 88 40 47 45 56 68 48 55 45 53 78 50 55 53 35 58 65 33 71 46 41 25 35 45 83 54 85 83 80 70 83 62 76 86 75 86 77 85 85 68 42 61 74 63 85 55 57 55 80 35 38 80 58 54 48 54 39 50 43 38 38 45 60 52 53 35 48 38 32 58 48 45 64 30 40 50 38 51 47 72 85 66 82 70 80 73 70 80 70 85 74 75 85 75 85 85 80 80 73 60 65 35 80 70 67 62 72 54 70 65 59 67 71 60 65 60 57 64 40 65 47 81 75 45 45 47 75 63 37 45 62 62 55 50 70 45 85 59 73 73 63 42 65 80 40 55 70 55 60 70 60 60 75 65 62 70 52 67 75 60 77 75 75 75 70 75 37 60 65 40 44 53 65 52 76 70 69 71 71 83 65 80 85 78 81 80 84 85 80 58 67 57 62 75 76 75 54 62 81 75 75 68 85 72 76 66 75 50 61 68 76 77 4 79 79 81 72 60 73 60 78 85 75 75 74 71 85 75 88 70 80 79 74 70 80 60 85 65 62 82 65 64 47 72 71 70 85 70 70 53 73 88 74 69 82 84 72 73 73 75 73 66 74 76 57 76 80 71 46 58 60 85 85 75 71 78 55 65 47 80 76 70 78 60 Zs Zp Zp Gbp Map Glg Zp Mq p Gbp Zp Mq Zs Zs Mq Mq Mq Zp Zp Et Et Zp Zp Zp Map Zs Zp Mq Not Exposed Zp Zp MFr-ps Zs Egt Et Z Mq Zs Et Zs Et Et Et Egp Mq Glg Egg Glg Etg Egp Map Gdg Mq Gbp Gbp Mq Zs Egg Zs Eqg Mq Mq Gdg Map Egg Zp Gbp Zs Mq Map Map Map Zs Glg Map Zs Map Map Map Map Map Map Map Mq Map Map Mq Mq Mq Map Map Mq Lake Athabasca Egp Zp Zp Zp Mq MFr-ps MFr-ps MFr-ps Zp Zp Zp Zp Zp Zp Egt Egt Marian Lake Lepus Island Isle Brochet Natukam Peninsula Neil Bay Point Creek Dempsey Bay Clark Island py gm gm gm gm Fel Fes Fes Feo Feo U-1565 U-1567 Fes 347000 347000 348000 348000 349000 349000 350000 350000 351000 351000 352000 352000 353000 353000 354000 354000 355000 355000 356000 356000 357000 357000 358000 358000 359000 359000 360000 360000 361000 361000 362000 362000 363000 363000 6581000 6581000 6582000 6582000 6583000 6583000 6584000 6584000 6585000 6585000 6586000 6586000 6587000 6587000 6588000 6588000 6589000 6589000 6590000 6590000 6591000 6591000 6592000 6592000 6593000 6593000 6594000 6594000 6595000 6595000 107°36'0"W 107°36'0"W 59°24'0"N 59°24'0"N 0 0.5 1 1.5 2 0.25 Kilometers 0 0.25 0.5 0.75 1 0.125 Miles Catalogue Number 2006- 4.2- (3.2) Project M.123 of 2006 The area was mapped by K.E. Ashton (project leader), B.R. Knox, and K.M. Bethune, in the summer of 2006, with the assistance of J. Marcotte, B. McEwan, L. Richan, and A. Kaczowka. This map was printed from the geologist’s digital file. Geological data were processed using Pendragon Forms, Microsoft Access, and ArcView 9.1 software. Base maps were compiled from 1:50 000 scale digital topographic maps licensed from Saskatchewan Information Services Corporation. Grid coordinates are NAD 83 UTM zone 13. The map was processed overall using ArcView 9.1 software. The map is issued in a package with the Summary of Investigations 2006 Volume 2, Saskatchewan Geological Survey, and is available separately. This map accompanies the following publication: Ashton, K.E., Knox, B.R., Bethune, K.M., and Marcotte, J. (2006): Bedrock Geology along the Northern Margin of the Athabasca Basin West of Fond-du-Lac (NTS 74O/5, 6), South-Central Beaverlodge Domain, Rae Province (The Fond-du-Lac Project): in Summary of Investigations 2006 Volume 2, Saskatchewan Geological Survey, Sask. Industry and Resources, Misc. Rep. 2006- 4.2. This map may be referenced as: Ashton, K.E., Knox, B. and Bethune, K.M. (2006): Bedrock Geology of the Western Fond-du-Lac Area, South-Central Beaverlodge Domain (Fond-du-Lac Project) (Part of NTS 74O/5 and /6) Central Sheet; 1:20 000 scale prelim. map with Summary of Investigations 2006 Volume 2, Saskatchewan Geological Survey, Sask. Industry and Resources, Misc. Rep. 2006-4.2. Bedrock Geology of the Western Fond-du- Lac Area, South-Central Beaverlodge Domain (Fond-du-Lac Project) (Part of NTS 74O/5 and 6) Central Sheet at 1:20 000 scale Preliminary Geological Map (2006) by K.E. Ashton, B. Knox and K.M. Bethune PALEOPROTEROZOIC ROCKS ATHABASCA GROUP Manitou Falls Formation, Raibl Member: sandstone and pebbly sandstone with MFr-ps thin mudstone beds: white to pink-red, planar and trough crossbedded, rare clay intraclasts ----------------- Unconformity --------------- ------------ D4: N-trending open upright folds ------- POST-TECTONIC DYKES Aplite dyke: pale pink, fine to medium grained (1 mm), massive, homogeneous, sharp contacts, NE trending, CI 3 (biotite-feldspar ± quartz ± amphibole); contains centimetre-scale mafic-ultramafic inclusions; intruded into lamprophyre dyke Felsite dyke: pale pink, light grey to pink-red weathering, grey to pink-red on fresh surface, aphanitic, generally straight sided but splay at ends, up to 2 m thick, NE trending, local biotite and fluorite along internal fractures, commonly uraniferous Granite dyke: pink and grey, medium grained with K-feldspar phenocrysts up to 1 cm long, massive to weakly foliated (locally oblique to dyke wall by up to 20), homogeneous but several phases distinguished by grain size, straight sided but splay at ends, up to 50 m thick, NE trending, CI 5-15 (biotite-quartz-K-feldspar- plagioclase); intruded by some lamprophyres but intrusive into others Lamprophyre dyke: pink to brown, fine to medium grained with phlogopite and rare pyroxene/amphibole phenocrysts, massive to weakly foliated (igneous?), homogeneous to multi phase; sharp contacts, straight sided, up to 10 m thick (generally 1-2 m), mostly NE trending, CI 20-55 (phlogopite-pyroxene/amphibole-K- feldspar; locally contains decimetre-scale angular to rounded granitoid inclusions and centimetre-scale mafic-ultramafic inclusions; locally intruded into granite and felsite dykes Granitic gneiss : >70% pink-white and grey, medium-grained leucogranite– Etg leucotonalite having CI <10 (pyroxene -quartz-feldspar ± biotite ± garnet), blue quartz common; rest grey fine-grained layers and inclusions of granite -tonalite and granite- quartz monzonite - plagioclase-phyric gabbro units (Et and Eqp) up to 1 m thick; generally non-magnetic Geological contact Bedding Main S1 foliation (dip unknown , inclined, vertical) S2 foliation S3 foliation (dip unknown, inclined) Dyke (inclined, vertical) Intersection lineation Lineation of unknown origin (mainly related to F2 and F3 folding) Minor S fold (F2, F3, F4) Minor Z fold (F2, F3, F4) Minor W fold (F2, F3) Minor symmetrical fold (F2, F3, F4) F2 axial plane F3 axial plane (inclined, vertical) F4 axial plane (inclined, vertical) Lineament and possible brittle fault Approximate outline of positive aeromagnetic anomaly Contour Interval: 50 feet Road Reef Mineral Occurrence U-1563 - U occurrence with Saskatchewan Mineral Deposit Index number Pb-1571 - Pb occurrence with Saskatchewan Mineral Deposit Index number gm - gummite U stain py – pyrite Feo - oxide-facies iron formation Fes - sulphide facies iron formation Fel - silicate-facies iron formation Note 1: The thickness of minor quartzite occurrences has been exaggerated to emphasize their stratigraphic importance. Note 2: All glacial data has been placed on a separate map in this volume entitled: Fond-du-Lac Project: Ice Flow Indicators, Western Fond-du-Lac Area, South-Central Beaverlodge Domain (Parts of NTS 74O/5 and 6), 1:50 000 scale, Preliminary Geological Map (2006), by J.E. Campbell, K.E. Ashton and B. Knox. Symbols -------------- D3: NE-trending folds ---------------- SYN-TECTONIC INTRUSIVE ROCKS Pegmatitic granite dyke: pink, massive to foliated, straight sided, locally folded, CI <5 (biotite-quartz-feldspar ± garnet ± muscovite ± tourmaline), variably recrystallized coarse biotite books -------------- D2: WNW-trending folds ---------------- ------------- D1: gneissosity, partial melting ------- Garnetiferous leucogranite: white to pale pink, medium grained, homogeneous to Glg gneissic, minor psammopelitic schlieren; CI 1-10 (garnet-quartz-feldspar ± biotite); non magnetic MURMAC BAY GROUP (Ca. 2.33 Ga) Pyribolite: black to brown, medium grained; homogeneous to layered, CI 40-60 Map (orthopyroxene-clinopyroxene-plagioclase-magnetite hornblende biotite); variably magnetic, locally very high Quartzite, minor psammite: quartzite white to pink, fine to medium grained, CI <10 Mq (quartz ± feldspar ± diopside ± biotite ± garnet ± cordierite); psammite grey-brown, fine to medium grained, CI <10 (biotite chlorite-quartz-feldspar ± garnet ± sillimanite ± cordierite ± diopside); non-magnetic --------------- Unconformity ------------------------ ARCHEAN AND PROBABLE ARCHEAN ROCKS WEST-CENTRAL PLUTONIC ROCKS Biotite-pyroxene gneiss: pink-brown and grey, fine to medium grained, gneissic Gbp due to partial melting and local compositional differences particularly at margins, CI 5-30, (biotite-pyroxene-quartz-feldspar ± garnet ± graphite); local diopsidite boudins, particularly near contacts; commonly injected by ~20% pyroxene granite sheets and intruded by pyribolite dykes up to 5 m thick; non-magnetic; (possibly altered basement to Murmac Bay Group) Adair Bay pluton: pink and grey, medium grained, homogeneous to gneissic, Gab granitic to tonalitic, CI 10-35, (orthopyroxene-biotite-quartz-K-feldspar-plagioclase); weakly magnetic Foliated to gneissic granite-granodiorite: pink-light brown, medium to coarse Gdm grained with rarely preserved feldspar augen up to 2 cm long; homogeneous to well layered due to injected leucosome and local strain gradients; CI 10 -25, (pyroxene- biotite-quartz-plagioclase-K-feldspar ± garnet); intruded by mafic dykes ; non- magnetic; (probably correlative with 2.6 Ga Dead Man Granite to west) Garnetiferous diatexite/granite: white or pale pink and grey, medium grained, Gdg homogeneous to locally gneissic with variably preserved melanosome and schlieren of psammopelitic to pelitic gneiss (Zp), CI 10-20 (garnet-biotite-quartz-feldspar ± orthopyroxene); (most derived by near-complete melting/homogenization of Zp, but some may be border phase of Gdm contaminated by adjacent Zp); non-magnetic SUPRACRUSTAL ROCKS Psammitic to psammopelitic gneiss, minor quartzite: white-pale pink and grey, Zs fine to medium grained, CI 5-15 (biotite-quartz-feldspar ± garnet ± cordierite ± sillimanite ± graphite), commonly interbedded with minor psammopelite to pelite; non-magnetic Psammopelitic to pelitic gneiss: white-pale pink and grey-brown to rusty, fine to Zp coarse grained, well layered due to compositional variation and abundant leucosome, garnet up to 8 cm in diameter with abundant sillimanite, local decimetre -scale pods of garnetite, CI 10-30 (garnet-sillimanite-biotite-quartz-K-feldspar ± plagioclase ± cordierite ± graphite); (grades into garnetiferous diatexite/granite - Gdg); non- magnetic EASTERN PLUTONIC COMPLEX Garnet-pyroxene granite: pink-brown to grey, medium grained, foliated, Egg homogeneous to vaguely layered, CI 5-10 (garnet-pyroxene-biotite-quartz-feldspar- ilmenite?), garnet locally up to 1 cm diameter, locally contains mafic layers (dykes or dioritic inclusions), minor hybrids; non-magnetic Pyroxene granite: white-cream to pink-brown and grey, medium grained with rarely Egp preserved feldspar augen up to 1 cm long, foliated, homogeneous, CI 10-20 (pyroxene-hornblende-biotite-quartz-plagioclase-K-feldspar); 25% injected pale pink- grey centimetre-scale granite leucosome; weakly magnetic Granite-quartz monzonite and plagioclase-phyric gabbro: Granite-quartz Eqp monzonite phase: pink and grey, coarse grained, homogeneous, CI 35 (hornblende- pyroxene-biotite-magnetite-plagioclase-K-feldspar-quartz), quartz blue, net veined by pyroxene granite sheets; Gabbro phase: brown to grey-black, medium grained with rarely preserved 1 cm long plagioclase phenocrysts, homogeneous, CI 30-50 (pyroxene-hornblende-biotite-magnetite-plagioclase ± quartz); injected by up to 70% granitic sheets; strongly magnetic Garnetiferous quartzofeldspathic gneiss: pink, white, or grey, medium-grained, Eqg homogeneous to gneissic with CI 2-20 (garnet-biotite-quartz-feldspar ± orthopyroxene ± graphite), garnet variably altered and weathered out, quartz commonly blue in east, centimetre-scale pods of red garnetite, commonly interlayered with granite-tonalite (Et) at metre scale; locally injected by pyroxene leucogranite sheets; non-magnetic Garnetiferous granite-tonalite gneiss: white to pink and grey, medium to coarse Egt grained, homogeneous to gneissic, CI 15-20, (garnet-biotite-quartz-feldspar ± pyroxene), quartz commonly blue, local black garnet-biotite melanosome and white- pink garnetiferous leucosome, rare fine-grained decimetre-scale garnetite layers and pods, intruded by garnetiferous granite sheets and mafic dykes; non-magnetic Granite-tonalite, minor diorite-gabbro: pink-cream to white and brown-grey, Et medium to coarse grained, homogeneous to gneissic, CI 10-25 (orthopyroxene- biotite-quartz-feldspar ± hornblende ± rare garnet), quartz generally blue; local metre- scale fine- to medium-grained intermediate to mafic inclusions; injected by up to 70% granitic sheets and rare metamorphosed mafic dykes; generally non-magnetic
