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Ontario Geological Survey
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MDI42A08NW00110
| Record Name(s) | Sylvanite Gold Mines Ltd. - 1956, Pollock - Briscoe Occurrence - 1956, Devil's Elbow Mines Ltd. - 1966 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1981-Feb-12 |
| Date Last Modified | 2023-Jan-24 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Lead, Zinc, Silver
Secondary Commodities: Gold
Township or Area: Bowman
Latitude: 48° 28' 33.34" Longitude: -80° 29' 33.57"
UTM Zone: 17 Easting: 537496 Northing: 5369324 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A08NW
Point Location Description: A point 2.65 km north and 5.30 km west of the southeast corner of Bowman Township.
Location Method: AMIS Site Visit
Access Description: 5.6 km south of Matheson on Bowman Road 2. Turn right on trail, Travel 1.0km, then 400m north though bush.
1915: Free gold is reported to have been discovered in the south half of lots 6 and 7, concession 2, Bowman Township (The Northern Miner, December 11, 1915). 1947: DD-3-750 ft. 1956-1958: Sylvanite Gold Mines Ltd.- EM and magnetometer surveys, surface trenching and sampling , DD-3-711 ft. 1966: Devil's Elbow Mines Ltd. - electromagnetic and magnetic surveys, DD-4-1504 ft. 1970: E. Foster - trenching. 1973-1975: Driftex Ltd.- VLF, HLEM and magnetic surveys, and a geological survey. 1981: Prospection Ltd.: magnetic and HL and VLF electromagnetic surveys and diamond drilled 1 hole totalling 388 feet.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| KL-0666, 10 | 42A08NW0121 | 42A08NW0121 |
| KL-0728, 2.1447 | 42A08NW0117 | 42A08NW0117 |
| 63.2035, KL-0666 | 42A08NW0118 | 42A08NW0118 |
| 2.1652, KL-0728 | 42A08NW0114 | 42A08NW0114 |
| 2.2013, KL-0728 | 42A08NW0112 | 42A08NW0112 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Mesoarchean
Metamorphism Grade: Greenschist
Dec 15, 2015 (R Degagne) - Geological mapping indicates that bedrock in the area consists mainly of weakly metamorphosed (greenschist or lower metamorphic facies) intermediate to mafic subaqueously deposited tholeiitic volcanic rocks and minor intercalated interflow tuffaceous and/or sedimentary rocks of the (Archean) Kinojevis Group. Local bedrock stratigraphy is east southeast striking, steeply dipping, south facing, and occupies part of the north limb of the east striking and east plunging Blake River Synclinorium. Intrusive rocks near the sulfide occurrence include a felsic granodioritic batholith (the northern contact of which is about 1.2 km southwest of the trenches) and ubiquitous narrow (generally tens of metres in width) north northeast striking diabase dikes of the (Proterozoic) Matachewan swarm, which intrude both Kinojevis Group rocks and the felsic batholith. A recent geophysical survey of Bowman Township failed to detect any significant bedrock conductors to occur in the area of known sulfide mineralization.
| Rock Type | Rank | Composition | Texture | Relationship | Granodiorite | 1 | Near |
|---|---|---|---|---|
| Diabase | 2 | Diabase | Intrudes | |
| Mafic lava flow-unsubdivided | 3 | Tholeiitic Basalt | Near | |
| Siltstone | 4 | Chloritic | Near | |
| Feldspar Porphyry | 5 | Feldspar Rich | Host | |
| Terrigenous-Clastic-Unsubdivided | 6 | Tuffaceous Wacke | Fine-Grained | Near |
| Schist-Unsubdivided | 7 | Chloritic,Carbonaceous | Host | |
| Mafic Tuff | 8 | Tuff | Host | |
| Vein | 10 | Quartz | Contains |
Dec 15, 2015 (R Degagne) - Information in the assessment files, Resident Geologist's Office, Kirkland Lake; in Shklanka; in Bath; and in Leahy indicates that in the southeast quarter of the north half of lot 7, concession 2, Bowman Township, a series of pits exposes splashes of massive chalcopyrite hosted by a conformable horizon of grey feldspar porphyry. Geological mapping by Driftex Ltd. (assessment files) indicates that the porphyry is mappable along 1,800 feet of strike, that it ranges from 20-100 feet in thickness, and that it is a conformable tuffaceous horizon which strikes 105 and dips 80 degrees north (contrary to well established regional trends as delineated by Leahy and Jensen. Sulphide mineralization is described to consist of disseminated chalcopyrite splashes and sphalerite in the feldspar tuff; of stringers and disseminations of chalcopyrite, sphalerite and galena along bedding planes and confined to fractures within thinly bedded tuff near the southern tuff contact; and of as much as 25% of nodular pyrite in tuff.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Gold | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 5 | Galena | Economic | Ore | ||||
| 6 | Silver | Economic | Ore | ||||
| 7 | Pyrrhotite | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue | ||||
| 2 | Carbonate | Economic | Gangue | ||||
| 4 | Feldspar | Economic | Gangue | ||||
| 5 | Amphibole | Economic | Gangue | ||||
| 6 | Chlorite | Economic | Gangue | ||||
| 7 | Leucoxene | Economic | Gangue | ||||
| 8 | Dolomite | Economic | Gangue | ||||
| 9 | Hematite | Economic | Gangue | ||||
| 10 | Epidote | Economic | Gangue | ||||
| Calcite | Alteration | Carbonatization | 1 | Strong | Replacement | ||
| Dolomite | Alteration | Carbonatization | 2 | Strong | Replacement | ||
| Hematite | Alteration | Unknown | 3 | Weak | Replacement | ||
| Epidote | Alteration | Saussuritization | 4 | Unknown | Replacement |
Dec 15, 2015 (A Wilson) - A 6.9 foot long trench chip sample collected by Sylvanite Gold Mines Ltd. is reported to have averaged 1.8% copper, another chip sample is reported to have averaged 0.6% copper along 5.6 feet and additional (grab?) samples assaying as much as 11.42% copper, 6.21% lead, 4.31% zinc and 0.6 ounce of silver per ton are reported. One diamond drill hole is reported to have intersected material which averaged 0.5% copper along a 4 foot core length. The Devil’s Elbow drilling reportedly intersected a 10 and 2 foot core length each of which averaged 0.5% copper, with additional associated anomalously elevated lead, zinc and silver values. A 2 foot section of a 10 foot core section is reported to have averaged 1.17% Zn, 0.65% Pb and 0.40% Cu. A 6 ft. section of core from DDH 1 assayed Cu 0.25% Pb 0.43%, Zn 0.84% over a core length of 6.0 feet. Samples collected by Sylvanite Gold Mines Ltd. returned Cu values ranging from 0.36% to 2.73%. Lead values ranged from 0.07 to 1.09% Pb.
Dec 15, 2015 (R Degagne) - Information in the assessment files, Resident Geologist's Office, Kirkland Lake; in Shklanka; in Bath; and in Leahy indicates that in the southeast quarter of the north half of lot 7, concession 2, Bowman Township, a series of pits exposes splashes of massive chalcopyrite hosted by a conformable horizon of grey feldspar porphyry. Geological mapping by Driftex Ltd. (assessment files) indicates that the porphyry is mappable along 1,800 feet of strike, that it ranges from 20-100 feet in thickness, and that it is a conformable tuffaceous horizon which strikes 105 and dips 80 º north (contrary to well established regional trends as delineated by Leahy and Jensen. Sulfide mineralization is described to consist of disseminated chalcopyrite splashes and sphalerite in the feldspar tuff; of stringers and disseminations of chalcopyrite, sphalerite and galena along bedding planes and confined to fractures within thinly bedded tuff near the southern tuff contact; and of as much as 25% of nodular pyrite in tuff. Mineralization exposed in a shallow trench blasted into bedrock near the north edge of an outcrop mass in the north half of lot 7, concession 2, Bowman Township (as indicated by Leahy; and Jensen) consists of variably sheared pyritic and pyrrhotitic(?) chlorite-amphibole-carbonate schist. The 2 m wide rusty weathering schist strikes 100º , dips irregularly north at an average angle of about 55º. Angular,brecciated pyrrhotite(?) and fine grained disseminated to 2 cm size idioblastic pyrite cubes occur within the chlorite- carbonate schist and within an undulose, marginal, and less intensely sheared 25-35 cm wide zone of Fe-dolomitized leucoxenitic basalt (to the north) and wacke (to the south).
Dec 07, 2005 (R Degagne) - Samples: AB-86-215: Outcrop chip from basalt flow underlying (north of) chlorite schist. Olive green, rusty weathering, magnetic fine grained basalt. Less than 1 mm grained, this sample has been pervasively Fe- dolomitized and displays leucoxene replacing magnetite. Calcite alteration is preferentially associated with leucoxene development. The sample contains 5% of disseminated pyrite blebs. AB-86-219: Outcrop chip obtained from near the stratigraphic top (southern contact) of the chlorite schist. Rusty weathering, weakly magnetic fine grained tuff similar to sample AB-86-218. This sample has been variably calcite and Fe-dolomite altered and consists of larger and more abundant peach-colored leucocratic (feldspathic) domains than does sample AB-86-218. 30-40% of recrystallized poikilitic idioblastic pyrite is present. Note that leucoxene specks occur in both the leucocratic felsic domains and in the melanocratic amphibolitized chloritic domains.
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Irregular | 2 | 100 | 55 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 548 | 30 | 105 | 80 |
Date: Jan 15, 1997
Geologist: R Degagne
Notes: Future work at this occurrence should include thorough prospecting of the porphyritic horizon as mapped by Leahy (1963, 1965) and Jensen (1985) and the remainder of exposed bedrock in its vicinity to locate the discovery trench (the site of most of the diamond drilling), where copper assays of as much as 11.42%, lead assays of as much as 6.21%, zinc assays of as much as 4.31% and silver assays of as much as 0.6 ounce of silver per ton have been reported. Analyses*: Sample : AB-86-215 20 Au ppb, --- Ag ppm, 7 Cu ppm, 2 Pb ppm, 71 Zn ppm. AB-86-216 30 Au ppb, --- Ag pm, 8 Cu ppm, 7 Pb ppm, 122 Zn ppm. AB-86-217 160 Au ppb, 0.2 Ag ppm, 13 Cu ppm, 16 Pb ppm, 125 Zn ppm. AB-86-218 10 Au ppb, --- Ag ppm, 6 Cu ppm, 37 Pb ppm, 54 Zn ppm. AB-86-219 nil Au ppb, --- Ag ppm, 10 Cu ppm, 76 Pb ppm, 100 Zn ppm. AB-86-220 nil Au ppb, --- Ag ppm, 6 Cu ppm, 4 Pb ppm, 191 Zn ppm. AB-86-221 nil Au ppb, --- Ag ppm, 8 Cu ppm, 33 Pb ppm, 251 Zn ppm. AB-86-222 10 Au ppb, --- Agp pm, 11 Cu ppm, 2 Pb ppm, 188 Zn ppm. AB-86-223 10 Au ppb, --- Ag ppm, 21 Cu ppm, 371 Pb ppm, 243 Zn ppm. AB-86-224 nil Au ppb, --- Ag ppm, 4 Cu ppm, 125 Pb ppm, 221 Zn ppm. AB-86-225 90 Au ppb, --- Agp pm, 14 Cu ppm, 122 Pb ppm, 267 Zn ppm; 70 Au ppb, --- Ag ppm, -- Cu ppm, --- Pb ppm, --- Znppb. AB-86-226 20 Au ppb, --- Agp pm, 7 Cu ppm, 155 Pb ppm, 119 Zn ppm. AB-86-230 nil Au ppb, --- Ag ppm, 5 Cu ppm, 18 Pb ppm, 70 Zn ppm. * All assays performed by Swastika Laboratories Ltd., Swastika
File - Resident Geologist files KL-0877, KL-2273, KL-2307, KL-2604
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland RGP files
Map - Geological series, Precambrian geology, Ramore area, northwestern part, District of Cochrane
Publication Number: P2860 Scale: 1:15,840 Date: 1985
Author: Jensen L.S.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Precambrian geology, Ramore area, districts of Cochrane and Timiskaming
Publication Number: P3131 Scale: 1:63,360 Date: 1989
Author: Jensen L.S.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Precambrian geology of the Magusi River area, Cochrane and Timiskaming districts
Publication Number: P2434 Scale: 1:63,360 Date: 1982
Author: Jensen L.S.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of Currie and Bowman townships, District of Cochrane
Publication Number: R040 Page: 18 Date: 1997
Author: Leahy E.J.
Publisher Name: Ontario Dept. of Mines
Location:
Folio - Bowman Township, District of Cochrane
Publication Number: GDIF271 Date: 1997
Author: Kirkland Lake RGO
Publisher Name: Ontario Geological Survey
Location:
Map - Bowman Township, District of Cochrane
Publication Number: P0205 Scale: 1:15,840 Date: 1997
Author: Leahy E.J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral occurrences, deposits, and mines of the Black River-Matheson area
Publication Number: OFR5735 Page: 61-70 Date: 1990
Author: Bath A.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Quaternary geology, Porquis Junction area, District of Cochrane
Publication Number: P2949 Scale: 1:50,000 Date: 1985
Author: Richard J.A., McClenaghan M.B.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Quaternary geology, Watabeag River area, districts of Cochrane and Timiskaming
Publication Number: P2950 Scale: 1:50,000 Date: 1985
Author: Richard J.A., McClenaghan M.B.
Publisher Name: Ontario Geological Survey
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 131 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Reconnaissance till sampling program, Matheson-Lake Abitibi area, District of Cochrane
Publication Number: MP141.081 Page: 472-477 Date: 1997
Author: Steele K.G.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology of the Highway 101 Area, East of Matheson, Ontario
Publication Number: M2676 Scale: 1:50,000 Date: 2003
Author: Berger B.R., Luinstra B., Ropchan J.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology and petrogenesis of the Archean Abitibi belt in the Kirkland Lake area, Ontario
Publication Number: MP123 Date: 1985
Author: Jensen L.S., Langford F.F.
Publisher Name: Ontario Geological Survey
Location:
Article - Black River-Matheson economic geologist program
Publication Number: MP132.084 Date: 1997
Author: Bath A.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Geophysical/geochemical series, Matheson-Black River area, Bowman Township, airborne electromagnetic survey, total intensity magnetic survey, District of Cochrane
Publication Number: M80594 Scale: 1:20,000 Date: 1984
Author: Questor Surveys Ltd.
Publisher Name: Ontario Geological Survey
Location:
Article - Quaternary geology and geochemical exploration in the Matheson area
Publication Number: MP136.294 Date: 1997
Author: McClenaghan M.B., Lavin O.P., Nichol I., Shaw J.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological Compilation of the Lake Abitibi Area, Abitibi Greenstone Belt
Publication Number: P3398 Scale: 1:100,000 Date: 1999
Author: Ayer J.A., Berger B.R., Trowell N.F.
Publisher Name: Ontario Geological Survey
Location:
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