Ontario Geological Survey
Permanent Link to this Record:
MDI42F04SW00004
| Record Name(s) | Swill Lake West and East Sulphide Occurrences - 1991, Manitouwadge 6-64 Claim Group - 9999, Swill Lake Property - 9999 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1996-Dec-23 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Sulphur/Pyrite
Secondary Commodities: Gold, Copper, Zinc
Township or Area: Leslie
Latitude: 49° 7' 48.23" Longitude: -85° 57' 39.82"
UTM Zone: 16 Easting: 575791.995 Northing: 5442434.347 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42F04SW
Point Location Description: Trench
Location Method: Field Visit
Access Description: The Swill Lake sulphide occurrences are located in the northwest quadrant of Leslie Township approximately 9 km west of Manitouwadge in the vicinity of Swill Lake. The occurrences are accessible via motor vehicle followed by travel on foot. From Manitouwadge, proceed west along the Caramat Industrial road for approximately 7.6 km to an unnamed secondary logging road. Proceed north along this unnamed logging road for approximately 2.6 km to a tertiary logging road that heads east towards Swill Lake. Proceed east, on foot, along this tertiary logging road for approximately 625 m to the vicinity of the Swill Lake East sulphide occurrence which is located near station 0+15S on line 0+00 of a grid cut in 1992. Pyrite and minor amounts of chalcopyrite are exposed in a medium-sized trench located near the west shore of Swill Lake. Additional sulphide minerals, including pyrite and pyrrhotite, are exposed elsewhere on the property within 3 trenches located approximately 1 km to the southwest of Swill Lake near station 6+75S on line 9+00W of the grid mentioned above. For reference purposes, this occurrence will be referred to as the Swill Lake West sulphide occurrence.
1931: Geological mapping; J.E. Thomson (ODM). 1954 (SL West): Line cutting, a ground geophysical survey (MAG, RESISTIVITY) and diamond drilling (7 holes totalling 1517m); Wadge Mines Limited. Drill holes No.7 and No.8, located approximately 600 m west of the occurrence, are reported to have intersected up to 17 m of 'weak' py-po mineralization containing occassional specks of cp. 1954 (SL East): Line cutting, geological mapping and a ground geophysical survey (MAG, SP); Mining Corporation of Canada, Limited. 1954-1957: Geological mapping; E. Pye (ODM). 1964: Line cutting, geological mapping and a ground geophysical survey (MAG, VLF-EM); Mining Corporation of Canada (1964) Limited. 1968-1970: Geological mapping; V. Milne (ODM). 1978-1979: Regional lake sediment and water geochemical survey; GSC-MNR. 1985: Airborne geophysical survey (EM, MAG, VLF-EM); 139250 Canada Inc. 1988 (SL East): Prospecting and lithogeochemical sampling; prospector A. Turner. 1989: Prospecting, stripping, trenching and lithogeochemical sampling; prospector A. Turner. 1990: Line cutting and a ground geophysical survey (MAG, VLF-EM); A. Turner. 1991: Prospecting, stripping, trenching and lithogeochemical sampling; Prospector A. Turner. 1992 (SL West): Line cutting, geological mapping, Prospecting and a ground geophysical survey (MAG, VLF-EM); Prospector A. Turner. 1993: Diamond drilling (1 hole approximately 10 m long); Prospector A. Turner. 1989: Geological mapping: H. Williams and F. Breaks (OGS). Dighem airborne geolphysical survey (EM, MAG, VLF-EM); Noranda Exploration Company, Ltd. and Noranda Minerals Inc. (Geco Division). 1990-1991: Lithogeochemical sampling B. Schnieders, M. Smyk and D. McKay (OGS). 1991-1992: Reconnaissance till geochemical survey; I.M. Kettles (GSC). 1991-1994: Geological mapping; E. Zaleski and V. Peterson (GSC).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.14822 | 42F04NW8322 | 42F04NW8322 |
| 2.13699 | 42F04SW0007 | 42F04SW0007 |
| 2.8262 | 42F04NW0004 | 42F04NW0004 |
| 63.1510 | 42F04NW0021 | 42F04NW0021 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Manitouwadge-Hornepayne
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
Dec 07, 2005 (D McKay) - The Swill Lake sulphide occurrences are located in the Wawa subprovince approximately 15 km south of the contact with the Quetico subprovince. The occurrences are located within the Manitouwadge greenstone belt which, in the vicinity of the occurrences, has been folded into an easterly plunging synformal structure. The occurrences are situated near the western tip of the belt along the southern limb of the synform near its hinge. The supracrustal rocks comprising the synform are enclosed by foliated intrusive rocks of the Black-Pic batholithic complex (Williams and Breaks 1990; Zaleski and Peterson 1993). The Manitouwadge mining camp, which includes the Geco Mine, is located approximately 9 km to the east-northeast of the Swill Lake sulphide occurrences.The area surrounding the occurrences is underlain primarily by a thick sequence of mafic metavolcanic rocks intercalated with lesser amounts of felsic metavolcanic and metasedimentary rocks (Pye 1960; Williams and Breaks 1990; Zaleski and Peterson 1993). The stratigraphy generally strikes westerly and dips to the north (Bliss and Ings 1992; Zaleski and Peterson 1993). Mineral assemblages suggest the supracrustal rocks in the vicinity of the occurrences have experienced upper amphibolite facies-grade regional metamorphism. A large, northeast-trending diabase dike is located along the west shore of Swill lake (Pye 1960; Williams and Breaks 1991; Zaleski and Peterson 1993). Other northeast- and northwest-trending diabase dikes occur locally (Pye 1960). The Nama Creek Fault (Pye 1960), a regional-scale northeast-trending structure, is located approximately 500 m west of the Swill Lake West sulphide occurrence. Sulphide mineralization has been discovered in 2 locations on the Swill Lake property: adjacent to the west shore of Swill Lake (i.e.: the Swill Lake East sulphide occurrence) and approximately 1 km to the southwest (i.e.: the Swill Lake West sulphide occurrence).
| Rock Type | Rank | Composition | Texture | Relationship | Mafic pillowed flow | 1 | Hb Schist And Amphibolite | Locally Pillowed | Host |
|---|---|---|---|---|
| Granite | 2 | Granite Sill/Dike | Near | |
| Felsic lava flow-unsubdivided | 3 | Thin Aphyric Rhyolitic Flows | Near | |
| Sandstone | 4 | Metawacke | Near |
Dec 07, 2005 (D McKay) - The Swill Lake West sulphide occurrence is hosted by mafic and felsic metavolcanic rocks located along the northern contact of the southern felsic metavolcanic unit described by Zaleski et al. (1994). The Swill Lake East sulphide occurrence is hosted by hydrothermally altered mafic metavolcanic rocks located north of the northern felsic unit. These altered rocks have been described by Schnieders and Smyk (1990, p. 149-150) as follows: The unit of most interest consists of dark grey-green, massive to banded, fine-grained amphibolite. Garnet-rich (up to 75 percent) bands, typically averaging 15 to 30 cm in width, may compose 50 percent of an outcrop. The bands consist of irregular to round porphyroblastic quartz-garnet aggregates, 0.25 to 2 cm in diameter. A foliation is developed in biotitic envelopes which wrap around the quartz-garnet porphyroblasts. Irregular quartz veinlets and pods are widely distributed.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| Garnet | Alteration | Hydrothermal | 1 | ||||
| Biotite | Alteration | Hydrothermal | 2 | ||||
| Quartz | Alteration | Hydrothermal | 3 |
Dec 07, 2005 (D McKay) - Bliss and Ings (1992, p.4) provide the following comments regarding the Swill Lake sulphide occurrences: Mineralization in the main sulphide trenches (i.e. the Swill Lake West sulphide occurrence) correspond to a VLF conductor in the southwest part of the property. Vein and stringer pyrite was sampled (SW-0019 to SW-0022) from pale to medium grey silicified banded mafics within 0.5-2.0 m of a granite sill/dike. Only 15-25 m south of the outcrop was relatively fresh mafic (possibly pillowed). North of these trenches the mafic outcrops exhibited moderate garnet alteration. A narrow aphyric rhyolite was sampled 10-20 m north of the trenches, but it was unaltered and unmineralized. The best sample returned 44 ppm Cu and 190 ppm Zn (SW-0019).The only other mineralization of note occurred in the biotite-garnet altered, sheared mafic on the west shore of Swill Lake (i.e. the Swill Lake East sulphide occurrence) located 1 km northwest of the trenches. Several 2-3 mm blebs of chalcopyrite were noted in samples SW-0005, -0006, which returned 41 ppm Cu - 150 ppm Zn and 7 ppm Cu - 63 ppm Zn, respectively. Regarding the Swill Lake East sulphide occurrence, Schnieders and Smyk (1990) state: Fine-grained, disseminated to wispy pyrite is ubiquitous and occurs in amounts much less than 1 percent. Amphibole clots and spotty feldspathization may be associated with the sulphides. A sample of this mineralization returned 0.013 percent Cu, 0.002 percent Zn, trace Au and nil Ag. Grab samples collected from the Swill Lake West sulphide occurrence in 1991 by prospector A. Turner and by D. McKay for the OGS returned assay results which varied from nil to 0.009 ounce Au/ton, nil to 0.39 ounce Ag/ton, 16 to 532 ppm Cu and 45 to 1180 ppm Zn.
Dec 07, 2005 (D McKay) - Regarding the alteration present at the Swill Lake East sulphide occurrence, Schnieders and Smyk (1990) state: The mineralogy and geochemistry strongly suggest that the original mafic volcanic rocks have been hydrothermally altered in a similar fashion to those associated with volcanogenic base metal deposits in the Manitouwadge camp. It must be noted, however, that anthophyllite, a major constituent in alteration zones in the Manitouwadge camp, has not yet been recognized at Swill Lake. Irregardless, the occurrence of such alteration, far removed from the 'mine series' rocks, is encouraging and dramatically expands potential target areas in the camp. Regarding the alteration present at the Swill Lake West sulphide occurrence, Bliss and Ings (1992) state: Vein and stringer pyrite was sampled (SW-0019 to SW-0022) from pale to medium grey silicified banded mafics within 0.5-2.0 m of a granite sill/dike. Only 15-25 m south of the outcrop was relatively fresh mafic (possibly pillowed). North of these trenches the mafic outcrops exhibited moderate garnet alteration.
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| 2 | Volcanogenic |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
Map - Manitouwadge area, District of Thunder Bay, Ontario
Publication Number: M1957-08 Scale: 1:31,680 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3
Publication Number: OFR5906 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Geology of the Manitouwadge-Hornepayne area
Publication Number: OFM0142 Scale: 1:50,000 Date: 1990
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Geology of the Manitouwadge greenstone belt, Ontario
Publication Number: OF 2753 Scale: 1:25,000 Date: 1993
Author: Zaleski, E; Peterson, V L
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183964
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Report on Geophysical, Geological and SP Surveys
Publication Number: Min Dep Date: 1954
Author: Britton, J.W.
Publisher Name:
Location: Thunder Bay RGP
Map - Total field aeromagnetic map of the Manitouwadge greenstone belt
Publication Number: OF 2754 Scale: 1:25,000 Date: 1993
Author:
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183965
Map - Shaded relief aeromagnetic map of the Manitouwadge greenstone belt
Publication Number: OF 2755 Scale: 1:25,000 Date: 1993
Author:
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/183966
Mono - Preliminary report on the geology of the Manitouwadge Lake area
Publication Number: S003 Date: 1955
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Structure and tectonics of the Manitouwadge greenstone belt and Wawa-Quetico subprovince boundary, Superior Province, northwestern Ontario; Geological Survey of Canada, Current Research no. 1994-C
Publication Number: Cur Res 1994-C Page: 237-247 Date: 1994
Author: Peterson, V L; Zaleski, E
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/193831
Part - Geology of the Manitouwadge area
Publication Number: ARV66-08 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Geological studies in the Manitouwadge-Hornpayne area
Publication Number: MP146.014 Page: 79-91 Date: 1997
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Article - Geological studies in the Manitouwadge-Hornepayne region
Publication Number: MP151.006 Page: 41-47 Date: 1997
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Article - Schreiber-Hemlo Resident Geologist's District - 1989
Publication Number: MP147.007 Page: 139-159 Date: 1997
Author: Schnieders B.R., Smyk M.C.
Publisher Name: Ontario Geological Survey
Location:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files, Swill Lake Property Examination
Publication Number: Min Dep Date: 1992
Author: Bliss, M. and Ings, D.
Publisher Name:
Location: Thunder Bay RGP
Publication - Lithotectonic setting of mineralization in the Manitouwadge Greenstone Belt, Ontario: preliminary results; Geological Survey of Canada, Paper no. 93-1C
Publication Number: GSC Paper 93-1C Date: 1993
Author: Zaleski, E. and Peterson, V.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/134258
Publication - Geological, geochemical, and age constraints on base metal mineralization in the Manitouwadge greenstone belt, northwest Ontario; Geological Survey of Canada, Current Research no. 1994-C
Publication Number: 94-C1b Page: 225-235 Date: 1994
Author: Zaleski, E; Peterson, V L; van Breemen, O
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/193830
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office