bedrock geology of the eastern fond-du- lac area ......gr ain edw th mop cz s,0 -5% b; ) l f...

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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 -107° -107° -108° -108° 60° 59° 59° 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 8 9 5 26 44 42 21 44 47 38 33 53 29 21 20 27 22 14 36 23 50 60 45 33 19 27 39 46 48 23 23 34 32 34 38 22 32 22 30 37 21 43 23 20 42 24 69 44 23 41 26 42 54 26 24 45 37 31 12 30 30 70 40 20 16 40 20 20 50 48 38 59 10 17 23 52 21 34 13 24 18 38 26 34 20 19 24 34 19 27 34 40 32 15 35 34 43 43 41 62 47 36 54 50 45 36 40 30 33 18 40 55 50 90 72 80 80 65 75 85 80 50 60 40 74 83 72 78 84 75 80 83 65 49 77 84 88 75 65 80 58 85 70 70 59 82 50 73 76 40 85 68 81 68 70 50 80 80 66 72 73 86 74 54 58 78 84 73 47 37 87 54 73 83 84 87 65 74 80 74 86 83 78 83 59 87 84 65 82 80 83 39 37 67 54 49 83 68 75 74 78 79 46 77 84 73 87 68 58 67 70 88 77 73 75 75 56 64 65 36 62 66 83 47 79 33 65 88 81 54 58 90 83 50 58 59 82 50 43 57 50 48 56 39 43 57 68 54 71 47 52 67 58 54 54 83 55 48 84 44 85 86 56 63 67 74 64 85 66 74 64 54 55 69 57 47 52 77 77 82 84 77 72 87 81 87 88 80 77 60 78 77 84 87 80 80 77 66 78 75 84 87 86 86 77 79 83 79 81 77 69 71 85 52 73 47 72 73 60 55 78 76 37 78 71 77 82 55 64 23 79 81 64 48 77 83 75 63 53 82 66 73 27 74 78 83 74 61 76 74 75 74 73 83 73 74 74 84 86 84 83 81 84 74 83 82 76 76 73 81 79 82 82 83 78 78 86 80 78 67 67 73 81 52 49 81 77 86 79 58 66 83 83 86 83 74 82 78 58 86 71 71 62 84 84 83 84 57 71 84 81 83 73 74 83 68 80 76 67 80 77 84 83 83 80 71 88 79 82 74 78 76 77 68 74 80 82 77 83 75 78 83 84 77 63 64 82 67 81 61 76 72 57 72 74 74 67 77 80 80 78 70 80 77 69 75 64 72 58 67 80 69 78 64 76 69 83 79 40 82 72 78 77 64 78 73 72 82 41 73 73 67 72 70 77 86 20 40 50 75 60 35 55 70 68 80 80 50 55 40 72 52 50 65 50 35 55 30 40 80 50 45 44 52 53 60 70 43 36 85 80 80 60 80 45 55 46 55 65 70 70 60 60 70 65 70 75 48 55 80 50 55 85 30 32 58 55 65 62 41 60 65 80 75 45 85 70 58 72 32 65 40 55 43 55 75 76 63 57 85 58 30 45 63 49 45 25 75 42 38 30 45 35 39 48 35 35 65 85 53 77 60 55 46 80 88 80 65 70 60 65 60 54 88 30 42 42 70 59 51 48 59 55 30 42 65 47 55 62 63 53 59 57 59 64 79 56 60 62 40 60 74 63 70 37 65 35 37 71 82 84 85 78 64 60 35 38 52 62 38 87 77 87 87 77 90 63 78 67 58 74 87 84 81 74 85 71 80 82 84 78 47 76 71 82 73 73 75 73 73 70 84 79 58 87 83 87 75 86 75 72 77 74 78 73 80 80 80 70 80 75 80 75 65 80 75 70 60 70 75 61 76 72 65 75 75 80 42 73 70 62 75 65 65 73 61 84 72 85 82 86 81 73 83 77 77 71 75 80 67 75 75 60 25 30 44 17 21 70 62 64 56 40 63 68 77 83 71 87 Pm Egt Et Etb Pm Etb Etb Et Lg Etb Et Etb Pm Eto Lg Lgb Egp Eto Eto Egt MFr-ps Et Eto Egb Egp Pm Et Pb Et Pb Lg Et Pb Egb Pm Egb Et Eto Lg Lg Pm Lg Pm Lg Lg Lg Lg Pm Et Pm Pm Egt Pm Pm Et Lg Egb Pb Pm Pm Etb Pm Pm Et Et Egt Pm Pm 45 85 50 73 52 82 57 81 82 80 38 Fond-du-Lac Fraser Point Bulyea River Bulyea River McKenzie Lake Fond-du-Lac Airfield Stolar Lake Brager Lake 374000 374000 375000 375000 376000 376000 377000 377000 378000 378000 379000 379000 380000 380000 381000 381000 382000 382000 383000 383000 384000 384000 385000 385000 386000 386000 387000 387000 388000 388000 389000 389000 6576000 6576000 6577000 6577000 6578000 6578000 6579000 6579000 6580000 6580000 6581000 6581000 6582000 6582000 6583000 6583000 6584000 6584000 6585000 6585000 6586000 6586000 6587000 6587000 6588000 6588000 6589000 6589000 6590000 6590000 107°W 107°W 107°12'W 107°12'W 59°24'N 59°24'N 0 0.5 1 1.5 2 0.25 Kilometres 0 0.25 0.5 0.75 1 0.125 Miles Catalogue Number 2007- 4.2- (7.1) ATHABASCA GROUP Manitou Falls Formation, Raibl Member (sandstone and pebbly sandstone with thin mudstone beds): white to pink-red, planar and trough crossbedded, rare clay intraclasts. -------------------------------------------- Unconformity --------------------------------------------------- Lamprophyre dyke: pink, brown, or green, fine to medium grained; massive to foliated, homogeneous; sharp contacts, straight sided to irregular masses, up to 2 m thick (one 10 m), mostly NE trending but rare NW-trending; with phlogopite and rare pyroxene/amphibole phenocrysts, colour index (CI) 20-55. BEAVERLODGE DOMAIN Late muscovite-biotite-garnet leucogranite: pale pink to grey, fine-grained to pegmatitic; homogeneous, massive, locally sheared; 0-5% biotite, 0-5% muscovite, 0-2% garnet; non magnetic. Biotite leucogranite: pink; 3-5% biotite, 0-5% muscovite, 0-2% garnet. Leucogranite dyke: cream, fine grained to pegmatitic, locally zoned with fine- grained margins and pegmatitic cores; massive to locally sheared; dykes are randomly oriented, locally forming stockwork; 3-5% randomly oriented fine- grained muscovite in aggregates up to 1 cm in diameter, 0-2% garnet, 0-3% biotite; non magnetic. ~~~~~~~~~~D4 (NE-trending open to isoclinal folds; Grease River Shear Zone)~~~~~~~~~~ Biotite leucogranite: pink or white, fine grained to pegmatitic; massive to sheared, locally gneissic; 0-5% biotite, 0-2% garnet. Biotite-garnet leucogranite dyke: white, medium grained to pegmatitic; commonly exhibits S4 foliation defined by biotite and/or quartz, variably sheared; as cm- to m-scale sheets and dykes; 0-5% biotite, 0-2% garnet; non magnetic. ~~D3 (NW-trending close to isoclinal folds, brittle-ductile shear zones with drag folding)~~~ ~~~~~~~~~~~~~~~~D1-D2 (E-W fabric, rare tight to isoclinal folds)~~~~~~~~~~~~~~~~~~ Eastern Plutonic Complex: (Granite-tonalite and derived orthogneiss): fine to coarse grained with feldspar augen up to 1.5 cm, multi-phase, homogeneous to gneissic; CI 5- 30: 5-30% biotite, 0-20% pyroxene, 0-20% garnet; biotite derived in part from retrogression of garnet and/or pyroxene, biotite pseudomorphs after garnet variably eroded to produce pock-marked weathering surface; quartz locally blue; weakly to non magnetic; intruded by a) cm- to dc-scale sheets of leucogranite: white, fine to coarse grained with minor pegmatitic zones, 0-5% biotite; and b) cm- to dc-scale mafic dykes/sheets: grey-black, fine to medium grained, homogeneous to gneissic, form schlieren in gneiss; 30-50% biotite, 30-50% pyroxene Biotite granite-tonalite, biotite gneiss: white to grey, rarely pale pink, commonly sheared to phyllonitic; 15-30% biotite; probably derived by deformation and/or mineral retrogression from Eto and Egp. Garnet-biotite granite: white-grey to cream-pink; 5-25% biotite, 5-20% garnet, ± graphite, ± sulphide; contains up to 40% leucogranite sheets producing net- veined or gneissic appearance; rare graphite suggests minor intercalated paragneiss. Garnetiferous granite-tonalite and derived gneiss: lineated, some partially melted; paleosome grey to dark grey; 15-25% biotite, 0-15% garnet, ± pyroxene; up to 30% garnetiferous granite leucosome: white, medium grained; intruded by: a) leucogranite sheets: white, medium grained; 0-5% variably retrogressed garnet; and b) norite dykes/sheets: cm to m scale, partially melted(?) locally to form m-scale discontinuous layers of garnetiferous granite grading into garnetite: pink to red-brown, medium to coarse grained; 15-80% garnet. Garnet-pyroxene granite-tonalite and derived orthogneiss: white to grey, fine to medium grained; 5-15% biotite, 0-10% pyroxene, 0-5% garnet, ± pyrite; intruded by: a) 10-40% leucogranite sheets; 3-5% biotite, 0-3% pyroxene; and b) minor m-scale garnetiferous granite sheets: white-grey, medium- to coarse-grained; 5-20% garnet up to 3 cm in diameter. Granite to tonalite, derived orthogneiss: white to grey, some partially melted, locally mylonitic; 10-30% biotite, 0-5% clinopyroxene, 0-5% orthopyroxene, ± garnet; derived in part from unit Eto. Pyroxene granite-tonalite: brown-grey, medium to coarse grained; trace-20% pyroxene (including ortho- and clinopyroxene), 0-20% biotite. Supracrustal Rocks Psammopelitic to pelitic gneiss and derived garnetiferous granite- leucogranite: white-grey to rusty, rarely pinkish-white, fine to medium grained; cm- to m-scale layering with minor pelitic layers up to 0.5 m thick containing cm- scale garnet porphyroblasts variably pseudomorphed by biotite/cordierite; CI 10- 30: 0-30% biotite, 0-20% garnet, 0-10% cordierite, 0-10% pyroxene, ± sillimanite, ± graphite, ± sulphide, quartz rarely blue; includes garnetiferous leucosome: white to rusty, medium-grained, 1-4 cm thick; non magnetic; intruded by: a) m- scale sheets of garnetiferous granite: white to rusty, medium grained with cm- scale garnet porphyroblasts variably pseudomorphed by biotite, homogeneous to weakly layered; CI 5-20, probably part of Egb; b) dc-scale sheets of garnetiferous leucogranite, white to rusty, medium grained; 0-5% garnet, 0-5% biotite, ± graphite, ± sulphides; and c) mafic sheets/dykes: brown to black, medium grained with rare pyroxene porphyroblasts up to 1 cm, massive to weakly foliated, CI 40-50: 30-50% pyroxene, 0-20% biotite. TANTATO DOMAIN Mary Granite: pinkish-white and grey, ultramylonitic zones dark grey, fine to medium grained with 2-5 mm feldspar porphyroclasts; homogeneous but variably mylonitized, lineated; local garnet and hornblende blastesis in ultramylonite; colour index (CI) 10-30: 10-30% biotite, 0-5% garnet, ± pyroxene, ± hornblende; weakly to non magnetic; intruded by granite dykes: pink, medium grained to pegmatitic, massive to ultramylonitic; CI <5. NOTE: Units with no colour in legend boxes are present on adjacent sheet. Geological contact Main S1 foliation (inclined) S2 foliation (dip unknown, inclined) S3 foliation (inclined) S4 foliation (dip unknown, inclined) S5 foliation (inclined) Dyke (inclined) Mineral lineation (L3, L4) Stretching lineation (L2, L4, L5) Unknown lineation Minor S fold (F2, F3, F4, F5) Minor Z fold (F2, F3, F4) Minor W fold (F4) Minor symmetrical fold (F2, F3, F4, F5) Inclined axial plane (F2, F3, F4, F5) Fault (dextral, sinistral) Shear zone (dextral, sinistral) Lineament and probable brittle-ductile fault Northern limit of the variably mylonitized rocks in the Grease River Shear Zone Mineral Occurrence U-1572 - U occurrence with Saskatchewan Mineral Deposit Index number Pb-1571 - Pb occurrence with Saskatchewan Mineral Deposit Index number Contour line (74O06 – 50 foot interval; 74O07 – 10 metre interval) Road Building Reef Rapids Note: All glacial data has been placed on separate maps in this volume: Campbell, J.E. (2007): Surficial Geology of the Fond-du-Lac area, Southeast Beaverlodge Domain (Parts of NTS 74O06 and 07); 1:50 000 scale prelim. map with Summary of Investigations 2007, Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2. Campbell, J.E., Knox, B.R., and Ashton, K.E. (2007): Ice Flow Indicators, Fond-du-Lac area, Southeast Beaverlodge Domain (Parts of NTS 74O06 and 07): 1:50 000 scale prelim. map with Summary of Investigations 2007, Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2. Symbols Bedrock Geology of the Eastern Fond-du- Lac area, Southeastern Beaverlodge Domain (Parts of NTS 74O06 and 07) West Sheet at (1:20 000 scale) Preliminary Geological Map (2007) by B.R. Knox, K.E. Ashton, and K.M. Bethune The area was mapped by B.R. Knox, K.E. Ashton (project leader), and K.M. Bethune, in the summer of 2007, with the assistance of R. From, J. Pitre, A. Putz, and E. Monahan. This map was printed from the geologist’s digital file. Geological data were processed using Pendragon Forms, Microsoft Access, and ArcView 9.2 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 9.2 software. The map is issued in a package with the Summary of Investigations 2007 Volume 2, Saskatchewan Geological Survey, and is available separately and on the internet at www.ir.gov.sk.ca. This map accompanies the following publication: Ashton, K.E., Knox, B.R. and Bethune, K.M. (2007): Bedrock Geology along the northern margin of the Athabasca Basin east of Fond-du-Lac (NTS 74O/6-7), southeastern Beaverlodge-southwestern Tantato Domains, Rae Province; in Summary of Investigations 2007, Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2. This map may be referenced as: Knox, B.R., Ashton, K.E., and Bethune, K.M. (2007): Bedrock Geology of the Eastern Fond-du-Lac Area, Southeastern Beaverlodge Domain (Parts of NTS 74O06 and 07) West Sheet; 1:20 000 scale prelim. map with Summary of Investigations 2007 Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2. Airfield Fault Lake Athabasca Grease River Shear Zone Unmapped Unmapped MFr-ps Lg Lgb Pb Etb Egb Egt Egp Et Eto Pm Tgm

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Page 1: Bedrock Geology of the Eastern Fond-du- Lac area ......gr ain edw th mop cz s,0 -5% b; ) l f dykes/sheets: grey-black, fine to medium grained, homogeneous to gneissic, form schlieren

Scale 1:20 000

This Map

Location Map

River

EnaLake

ATHABASCA

DavyLake

BeaverlodgeLake

Tazin

Lake

RichardsLake

Engler

LakeHelmer

SquirrelLake

OldmanLakeNicholson

NevinsLake

Lake ForsythLake

Riou

Lake

LakeThicke

LakeBox

OmanLake

Lake

Picea

FontaineLake

Lake

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-1574O-1474O-1374N-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-1674K-15

-107°

-107°

-108°

-108°60°

59°59°

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.

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Fond-du-Lac

Fraser Point

Bulyea River

Bulyea River

McKenzie Lake

Fond-du-Lac Airfield

Stolar Lake

Brager Lake

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107°W

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107°12'W

107°12'W

59°24

'N

59°24

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0 0.5 1 1.5 20.25Kilometres

0 0.25 0.5 0.75 10.125Miles

Catalogue Number 2007- 4.2- (7.1)

ATHABASCA GROUP Manitou Falls Formation, Raibl Member (sandstone and pebbly sandstone with thin

mudstone beds): white to pink-red, planar and trough crossbedded, rare clay intraclasts.

-------------------------------------------- Unconformity --------------------------------------------------- Lamprophyre dyke: pink, brown, or green, fine to medium grained; massive to foliated,

homogeneous; sharp contacts, straight sided to irregular masses, up to 2 m thick (one 10 m), mostly NE trending but rare NW-trending; with phlogopite and rare pyroxene/amphibole phenocrysts, colour index (CI) 20-55.

BEAVERLODGE DOMAIN Late muscovite-biotite-garnet leucogranite: pale pink to grey, fine-grained to

pegmatitic; homogeneous, massive, locally sheared; 0-5% biotite, 0-5% muscovite, 0-2% garnet; non magnetic.

Biotite leucogranite: pink; 3-5% biotite, 0-5% muscovite, 0-2% garnet.

Leucogranite dyke: cream, fine grained to pegmatitic, locally zoned with fine-grained margins and pegmatitic cores; massive to locally sheared; dykes are randomly oriented, locally forming stockwork; 3-5% randomly oriented fine-grained muscovite in aggregates up to 1 cm in diameter, 0-2% garnet, 0-3% biotite; non magnetic.

~~~~~~~~~~D4 (NE-trending open to isoclinal folds; Grease River Shear Zone)~~~~~~~~~~

Biotite leucogranite: pink or white, fine grained to pegmatitic; massive to sheared, locally gneissic; 0-5% biotite, 0-2% garnet.

Biotite-garnet leucogranite dyke: white, medium grained to pegmatitic; commonly exhibits S4 foliation defined by biotite and/or quartz, variably sheared; as cm- to m-scale sheets and dykes; 0-5% biotite, 0-2% garnet; non magnetic.

~~D3 (NW-trending close to isoclinal folds, brittle-ductile shear zones with drag folding)~~~~

~~~~~~~~~~~~~~~~D1-D2 (E-W fabric, rare tight to isoclinal folds)~~~~~~~~~~~~~~~~~~

Eastern Plutonic Complex: (Granite-tonalite and derived orthogneiss): fine to coarse grained with feldspar augen up to 1.5 cm, multi-phase, homogeneous to gneissic; CI 5-30: 5-30% biotite, 0-20% pyroxene, 0-20% garnet; biotite derived in part from retrogression of garnet and/or pyroxene, biotite pseudomorphs after garnet variably eroded to produce pock-marked weathering surface; quartz locally blue; weakly to non magnetic; intruded by a) cm- to dc-scale sheets of leucogranite: white, fine to coarse grained with minor pegmatitic zones, 0-5% biotite; and b) cm- to dc-scale mafic dykes/sheets: grey-black, fine to medium grained, homogeneous to gneissic, form schlieren in gneiss; 30-50% biotite, 30-50% pyroxene

Biotite granite-tonalite, biotite gneiss: white to grey, rarely pale pink, commonly sheared to phyllonitic; 15-30% biotite; probably derived by deformation and/or mineral retrogression from Eto and Egp.

Garnet-biotite granite: white-grey to cream-pink; 5-25% biotite, 5-20% garnet, ± graphite, ± sulphide; contains up to 40% leucogranite sheets producing net-veined or gneissic appearance; rare graphite suggests minor intercalated paragneiss.

Garnetiferous granite-tonalite and derived gneiss: lineated, some partially melted; paleosome grey to dark grey; 15-25% biotite, 0-15% garnet, ± pyroxene; up to 30% garnetiferous granite leucosome: white, medium grained; intruded by: a) leucogranite sheets: white, medium grained; 0-5% variably retrogressed garnet; and b) norite dykes/sheets: cm to m scale, partially melted(?) locally to form m-scale discontinuous layers of garnetiferous granite grading into garnetite: pink to red-brown, medium to coarse grained; 15-80% garnet.

Garnet-pyroxene granite-tonalite and derived orthogneiss: white to grey, fine to medium grained; 5-15% biotite, 0-10% pyroxene, 0-5% garnet, ± pyrite; intruded by: a) 10-40% leucogranite sheets; 3-5% biotite, 0-3% pyroxene; and b) minor m-scale garnetiferous granite sheets: white-grey, medium- to coarse-grained; 5-20% garnet up to 3 cm in diameter.

Granite to tonalite, derived orthogneiss: white to grey, some partially melted, locally mylonitic; 10-30% biotite, 0-5% clinopyroxene, 0-5% orthopyroxene, ± garnet; derived in part from unit Eto.

Pyroxene granite-tonalite: brown-grey, medium to coarse grained; trace-20% pyroxene (including ortho- and clinopyroxene), 0-20% biotite.

Supracrustal Rocks

Psammopelitic to pelitic gneiss and derived garnetiferous granite-leucogranite: white-grey to rusty, rarely pinkish-white, fine to medium grained; cm- to m-scale layering with minor pelitic layers up to 0.5 m thick containing cm-scale garnet porphyroblasts variably pseudomorphed by biotite/cordierite; CI 10-30: 0-30% biotite, 0-20% garnet, 0-10% cordierite, 0-10% pyroxene, ± sillimanite, ± graphite, ± sulphide, quartz rarely blue; includes garnetiferous leucosome: white to rusty, medium-grained, 1-4 cm thick; non magnetic; intruded by: a) m-scale sheets of garnetiferous granite: white to rusty, medium grained with cm-scale garnet porphyroblasts variably pseudomorphed by biotite, homogeneous to weakly layered; CI 5-20, probably part of Egb; b) dc-scale sheets of garnetiferous leucogranite, white to rusty, medium grained; 0-5% garnet, 0-5% biotite, ± graphite, ± sulphides; and c) mafic sheets/dykes: brown to black, medium grained with rare pyroxene porphyroblasts up to 1 cm, massive to weakly foliated, CI 40-50: 30-50% pyroxene, 0-20% biotite.

TANTATO DOMAIN

Mary Granite: pinkish-white and grey, ultramylonitic zones dark grey, fine to medium grained with 2-5 mm feldspar porphyroclasts; homogeneous but variably mylonitized, lineated; local garnet and hornblende blastesis in ultramylonite; colour index (CI) 10-30: 10-30% biotite, 0-5% garnet, ± pyroxene, ± hornblende; weakly to non magnetic; intruded by granite dykes: pink, medium grained to pegmatitic, massive to ultramylonitic; CI <5.

NOTE: Units with no colour in legend boxes are present on adjacent sheet.

Geological contact Main S1 foliation (inclined)

S2 foliation (dip unknown, inclined)

S3 foliation (inclined)

S4 foliation (dip unknown, inclined)

S5 foliation (inclined)

Dyke (inclined)

Mineral lineation (L3, L4)

Stretching lineation (L2, L4, L5)

Unknown lineation Minor S fold (F2, F3, F4, F5) Minor Z fold (F2, F3, F4)

Minor W fold (F4) Minor symmetrical fold (F2, F3, F4, F5) Inclined axial plane (F2, F3, F4, F5) Fault (dextral, sinistral)

Shear zone (dextral, sinistral)

Lineament and probable brittle-ductile fault Northern limit of the variably mylonitized rocks in the Grease River Shear Zone Mineral Occurrence

U-1572 - U occurrence with Saskatchewan Mineral Deposit Index number Pb-1571 - Pb occurrence with Saskatchewan Mineral Deposit Index number Contour line (74O06 – 50 foot interval; 74O07 – 10 metre interval) Road Building Reef Rapids Note: All glacial data has been placed on separate maps in this volume:

Campbell, J.E. (2007): Surficial Geology of the Fond-du-Lac area, Southeast Beaverlodge Domain (Parts of NTS 74O06 and 07); 1:50 000 scale prelim. map with Summary of Investigations 2007, Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2. Campbell, J.E., Knox, B.R., and Ashton, K.E. (2007): Ice Flow Indicators, Fond-du-Lac area, Southeast Beaverlodge Domain (Parts of NTS 74O06 and 07): 1:50 000 scale prelim. map with Summary of Investigations 2007, Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2.

Symbols

Bedrock Geology of the Eastern Fond-du-Lac area, Southeastern Beaverlodge Domain (Parts of NTS 74O06 and 07) West Sheet at (1:20 000 scale)

Preliminary Geological Map (2007)

by B.R. Knox, K.E. Ashton, and K.M. Bethune The area was mapped by B.R. Knox, K.E. Ashton (project leader), and K.M. Bethune, in the summer of 2007, with the assistance of R. From, J. Pitre, A. Putz, and E. Monahan. This map was printed from the geologist’s digital file. Geological data were processed using Pendragon Forms, Microsoft Access, and ArcView 9.2 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 9.2 software. The map is issued in a package with the Summary of Investigations 2007 Volume 2, Saskatchewan Geological Survey, and is available separately and on the internet at www.ir.gov.sk.ca. This map accompanies the following publication: Ashton, K.E., Knox, B.R. and Bethune, K.M. (2007): Bedrock Geology along the northern margin of the Athabasca Basin east of Fond-du-Lac (NTS 74O/6-7), southeastern Beaverlodge-southwestern Tantato Domains, Rae Province; in Summary of Investigations 2007, Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2. This map may be referenced as: Knox, B.R., Ashton, K.E., and Bethune, K.M. (2007): Bedrock Geology of the Eastern Fond-du-Lac Area, Southeastern Beaverlodge Domain (Parts of NTS 74O06 and 07) West Sheet; 1:20 000 scale prelim. map with Summary of Investigations 2007 Volume 2, Saskatchewan Geological Survey, Sask. Industry Resources, Misc. Rep. 2007-4.2.

Airfield FaultLake Athabasca

Grease River Shear Zone

Unmapped

Unmapped

MFr-ps

Lg

Lgb

Pb

Etb

Egb

Egt

Egp

Et

Eto

Pm

Tgm