bedrock geology of the eastern fond-du- lac area ......gr ain edw th mop cz s,0 -5% b; ) l f...
TRANSCRIPT
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.
Legend
8
9
5
26
44
42
21
44
47
3833
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
2434
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
7580
83
65
49
77
84
88
75
65
80
58
85
70
70
59
8250
73
76
40
85
68
81
68
70
50
80
80
66
7273
86
74
54
58
78
84
73
47
3787
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
5890
83505859
8250
4357
5048
56
39
43
57
68
54
71
47
52
67
58
54
54
83
55
48
84
44
8586
56
63
67
74
64
85
66
74
64
54
55
69
57
47
52
77
77
82
8477
72
87
81
8788
80
77
60
78
7784
8780
80
77
66
78
75
84
87
86
86
7779
8379
81
77
69
7185
5273 4772
73
60
55
78
76
37
7871
7782
55
64
23
79
81
64
48
77
83
75
63
5382
66
73
27
74
7883
74
61
76
7475
74
73 83
7374
74
84
86
84
83 81
84
74
83
82
76
76
7381
79
82
82
83
78
78
86
80
78
67
67
73
81
52
49
81
77
86
795866
83
83
86
83
7482
7858
86
71
71
62
84
8483
8457
71
84
81
83
7374
83
68
8076
6780
77
84
83
8380
71
88
79
82
7478
76
77
68
74
8082
77
83
75
78
83
8477
63
64
82
6781
61
7672
57
72
74
74
67
77
80
8078
70
80
77
69
75
64
72
58
67
80
69
78
64
76
69
83
79
40
82
7278
7764
7873
72
82
41
73 73
67
72
70
7786
20
40
50
7560
35
55 70
68
80
80
50
55
4072
52
5065
50
35
55
30
4080
5045
4452
53
60 70
43 36
85
80 80 60 80
45 55
46
5565
70
7060
60
70
65
70
75
48
55
805055
85
30
3258
55
65
62
41
60
65
80
75
45
8570
58
72
32
65
40
55
43
5575
76
63
5785 58
3045
63
49 45 25
75
42
38
30
45
35
39
483535
65
85
53
77
60
55
46
80
888065
70
60
65
60
54
88
30
42
42
70
5951
48
59
5530
42
65
47
55
62
63
53
59
57
59
64
79
56
60
62
40
60
74
63
7037
65
35
37
71
8284
85
78
64
60
3538
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
7084
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
8286
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
LgLg
Lg
Lg
Pm
Et
Pm
Pm
Egt
Pm
Pm
Et
Lg
Egb
PbPm
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
6576
000
6576
000
6577
000
6577
000
6578
000
6578
000
6579
000
6579
000
6580
000
6580
000
6581
000
6581
000
6582
000
6582
000
6583
000
6583
000
6584
000
6584
000
6585
000
6585
000
6586
000
6586
000
6587
000
6587
000
6588
000
6588
000
6589
000
6589
000
6590
000
6590
000
107°W
107°W
107°12'W
107°12'W
59°24
'N
59°24
'N
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