Ontario Geological Survey
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MDI42A09SW00155
| Record Name(s) | Northern Goldbelt - 1990, Matheson Gold Ltd. - 1990, Canadian Johns-Manville Co. Ltd. - 1950 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1990-Nov-12 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Silver
Secondary Commodities: Copper, Zinc, Lead
Township or Area: Munro
Latitude: 48° 33' 49.31" Longitude: -80° 15' 47.52"
UTM Zone: 17 Easting: 554360.297 Northing: 5379217.914 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A09SW
Point Location Description: A point 2.84 km north and 0.95 km east of the southwest corner of Munro Township.
Location Method: Conversion from MDI
Access Description: Best access to the veins is provided by a 4 wheel drive vehicle passable road which trends northwest from the Canadian Johns-Manville Co. Ltd. Munro (asbestos) Mine mill area across a prominent but narrow, northwest trending tailings pile. The occurrence area is about 60 m at azimuth 355 from the northwest end of this road, and may be reached through open bush by foot. The Munro Mine site may be reached via a paved access road which intersects Highway 101 near the southwestern corner of Munro Township.
1915: Rhyolite hosting quartz veins near the common boundary of Beatty and Munro Townships was reported to carry low gold values (Hopkins 1915). 1925: Northern Gold Belt Mining Co. Ltd. was incorporated in August (Sutherland et al. 1926). 1926(?): At about this time, the Matheson Mining Syndicate acquired from Matheson Gold Ltd. 15 claims in Munro Township, including (now patented) claims 1174 and 16401 on which the occurrence is located. These claims were subsequently sold to Northern Gold Belt (Satterly 1952). 1949: Three holes totalling 2,203 feet were diamond drilled near the No. 3 post of claim 16401, evidently as part of an asbestos exploration program. 1950: Northern Gold Belt sold 12 claims, including patented claims 1174 and 16401, to Canadian Johns-Manville Co. Ltd. (Satterly 1952). 1988: Claims 1174 and 16401 are indicated on current (1988) claim maps to be patented.
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Tectonic Assemblage: Stoughton-Roquemaure
Geological Age: Mesoarchean
Metamorphism Grade: Greenschist
Dec 07, 2005 (R Degagne) - The claims occupy part of the south limb of the McCool Hill Syncline, the southeast striking and northwest plunging axis of which is about 5 km northeast of the veins in north central Munro Township (Johnstone 1987). About 1.5 km southwest of the occurrence, the southeast striking Contact Fault is localized along the contact between (metamorphosed) turbiditic sediments of the (Archean) Porcupine Group and overlying Stoughton-Roquemaure Group volcanic rocks. A few hundred metres northeast of the occurrence, an extensive swamp marks the location of the southeast striking Munro Fault Zone, a regional scale feature which is oriented subparallel to local stratigraphic strike and which is several hundred metres wide in this area. Dominant structural elements in the area include those which are oriented subparallel to local stratigraphy (examples include the (regional scale) Contact Fault and Munro Fault Zone) and locally developed cross structures with north to north northeast strikes across which may be developed limited components of (often dextral) apparent horizontal displacement (Satterly 1952).
| Rock Type | Rank | Composition | Texture | Relationship | Peridotite | 1 | Peridotite-Dunite; Srp | Near |
|---|---|---|---|---|
| Diabase | 2 | Diabase | Near | |
| Lamprophyre-Unsubdivided | 3 | Near | ||
| Mafic pillowed flow | 4 | Basalt; Cbz, Py, Apy,Qv,Qcv | Pillowed | Host |
| Felsic lava flow-unsubdivided | 5 | Rhyolite; Ser, Qv, Qcv,Qtz,Fel | Massive-Flow Banded-Brecciated | Host |
| Vein | 6 | Qtz, Qtz-Cal; Fe-Dol, Py, Apy | Contains |
Dec 07, 2005 (R Degagne) - Bedrock underlying patented claim nos. 1174 and 16401 consists mainly of variably glacial drift covered southeast striking northeast facing and subvertically dipping weakly metamorphosed (greenschist or lower metamorphic facies) tholeiitic basalt and calc alkalic rhyolites of the (Archean) Stoughton-Roquemaure Group (Satterly 1952; Johnstone and Trowell 1985, 1984; Jensen and Baker 1986; Johnstone 1987, Johnstone and Steele 1989; Vagners 1984; McClenaghan et al. 1988, 1987; Steele 1988). Intrusive rocks in the area include variably serpentinized mafic to ultramafic layered sills and semi-discordant ultramafic (peridotite-dunite) masses which are hosted by tholeiitic basalt between the rhyolite hosting the quartz veins and the Munro Fault Zone (Johnstone 1987). Narrow (tens of metres in width) generally north striking diabase dikes of the (Proterozoic) Matachewan swarm (Heaman 1989) occur in the area as do lamprophyre dikes (Satterly 1952). The rhyolite may locally display massive, flow band and pyroclastic (breccia) textures. Sulfide minerals associated with the stringer system include pyrite and arsenopyrite. Both sulfide minerals most commonly occur as disseminations totalling less than 4% in (essentially unaltered) rhyolite marginal to the stringers and, less commonly, within the stringers themselves. Shearing is not associated with the stringers and narrow (centimetre scale) veinlets oriented orthogonally to the stringer walls extend into the rhyolite. Satterly (1952) reported that the pit excavated into the stringer system southwest of the pits (in basalt) exposed a quartz breccia vein containing pyrite and arsenopyrite in carbonatized basaltic breccia fragments.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 1 | Carbonate | Economic | Gangue | ||||
| 2 | Sericite | Economic | Gangue | ||||
| 3 | Quartz | Economic | Gangue | ||||
| 4 | Calcite | Economic | Gangue | ||||
| 5 | Dolomite | Economic | Gangue | ||||
| Sericite | Alteration | Sericitization | 1 | Medium | Massive | ||
| Carbonate | Alteration | Carbonatization | 2 | Weak | Massive | ||
| Calcite | Alteration | Carbonatization | 3 | Veins | |||
| Dolomite | Alteration | Carbonatization | 4 | Veins |
Dec 07, 2005 (R Degagne) - Mineralization observed by the present writer consists of scant sulfide minerals (pyrite, arsenopyrite) associated with white quartz-calcite-Fe- dolomite-(albite?) stringers within sericitic rhyolite. The stringers are not associated with a shear and appear to be the result of brittle deformation which is manifested in the rhyolite as narrow gash veins with none to minimal associated wallrock alteration and which are reported (Satterly 1952) to occur in the basalt as a quartz vein breccia. The quartz and (less commonly) quartz-calcite veins and veinlets are discontinuously developed in grey to white weathering yellowish nonmagnetic sericitic rhyolite which contains glassy quartz and/or milky white feldspar phenocrysts. Limited sampling by the present writer demonstrates that anomalously enriched gold, silver, and arsenic tenors are associated with a northeast striking quartz-carbonate vein system. Most sulfide (pyrite and arsenopyrite) mineralization where the vein system is hosted by rhyolite occurs marginal to the veins rather than within them. Similarly, where the system is reported (Satterly 1952) to be hosted by basalt, the associated sulfide (pyrite and arsenopyrite) mineralization also occurs within wallrock breccia fragments rather than within vein material. Analyses*: Sample AB-86-31: 20 Au ppb, 5.6 Ag ppm, 129 As ppm, <1.5 Cu ppm, 422 Pb ppm, 593 Zn ppm, <5 Mo ppm. Sample AB-86-32: 179 Au ppb, 30.7 Ag ppm, 184 As ppm, 4.9 Cu ppm, 417 Pb ppm, 491 Zn ppm, <5 Mo ppm. Sample AB-86-33: 466 Au ppb, 10.6 Ag ppm, 151 As ppm, 6.2 Cu ppm, 352 Pb ppm, 605 Zn ppm, <5 Mo ppm. Sample AB-86-34: <10 Au ppb, 2.4 Ag ppm, 42.5 As ppm, 7.0 Cu ppm, 393 Pb ppm, 850 Zn ppm, <5 Mo ppm. * All analyses performed by Accurassay Laboratories Ltd., Kirkland Lake.
Dec 07, 2005 (R Degagne) - Sericitization of the rhyolite is characteristic of the entire lithologic unit and is not veinlet related. Although the pillowed basalt hosting the vein system southwest of the pits is weakly carbonatized whereas basalt along strike to the northwest and southeast are not, the carbonatization here is likely due to processes unrelated to the brittle deformational event which resulted in stringer system formation (such as local syndepositional carbonatization).
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| Rank | Characteristic |
|---|---|
| 2 | Breccia |
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Irregular | .2 |
Date: Feb 03, 1997
Geologist: R Degagne
Notes: Visited in 1986, by A. C. Bath (OFR 5735, V.1, p.312) . Further prospecting in the area, if warranted, should concentrate on locating additional occurrences of analogous northeast striking cross structures, especially where they are developed within host rock which is potentially more readily mineralized by hydrothermal fluids than is rhyolite. Such rocks would likely be represented by virtually any lithology more mafic (less felsic) than the rhyolite horizon. Sulfidic stratigraphic horizons (similar to those at the Croesus Mine and at the Brown-Munro occurrence) where host to such northeast striking hydrothermal systems should be high priority exploration targets.
Map - Beatty-Munro gold area, District of Timiskaming
Publication Number: ARM24A Scale: 1:63,360 Date: 1998
Author: Hopkins P.E., Greenland C.W.
Publisher Name: Ontario Bureau of Mines
Location:
Map - Black River-Matheson Area
Publication Number: OFM0013 Scale: 1:15,840 Date: 1985
Author: Johnstone R.M., Trowell N.F.
Publisher Name:
Location:
Part - Geology of Munro Township
Publication Number: ARV60-08 Page: 51-52 Date: 1997
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geophysical/geochemical series, Matheson-Black River area, Munro Township, airborne electromagnetic survey, total intensity magnetic survey, District of Cochrane
Publication Number: M80586 Scale: 1:20,000 Date: 1984
Author: Questor Surveys Ltd.
Publisher Name: Ontario Geological Survey
Location:
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Page: 34 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Map - Quaternary geology of Matheson area, Cochrane District
Publication Number: P2735 Scale: 1:50,000 Date: 1985
Author: Vagners U.J.
Publisher Name: Ontario Geological Survey
Location:
Mono - Preliminary report on the Timmins-Kirkland Lake area, gold deposits file
Publication Number: OFR5467 Page: G0009 Date: 1983
Author: Hodgson C.J.
Publisher Name: Ontario Geological Survey
Location:
Folio - Munro Township, District of Cochrane
Publication Number: GDIF361 Date: 1997
Author: Kirkland Lake RGO
Publisher Name: Ontario Geological Survey
Location:
Map - Township of Munro, District of Cochrane, Ontario
Publication Number: M1951-05 Date: 1997
Author: Satterly J., Hogg N.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral occurrences, deposits, and mines of the Black River-Matheson area
Publication Number: OFR5735 Page: 310-317 Date: 1990
Author: Bath A.C.
Publisher Name: Ontario Geological Survey
Location:
Article - Quaternary geology and geochemical exploration in the Matheson area
Publication Number: MP140.294 Date: 1997
Author: McClenaghan M.B., Lavin O.P., Nichol I., Shaw J.
Publisher Name: Ontario Geological Survey
Location:
Article - Precambrian geology of the Black River-Matheson (BRIM) area, District of Cochrane
Publication Number: MP126.056S Date: 1997
Author: Johnstone R.M., Trowell N.F.
Publisher Name: Ontario Geological Survey
Location:
Part - The Beatty-Munro gold area
Publication Number: ARV24-01.004 Date: 1998
Author: Hopkins P.E.
Publisher Name: Ontario Bureau of Mines
Location:
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