Ontario Geological Survey
Permanent Link to this Record:
MDI42A09SE00162
| Record Name(s) | Lalonde - 1990, Falkenham - 1990, Bruneau - 1990 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1990-Nov-12 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper, Zinc, Lead, Silver, Arsenic
Township or Area: Munro
Latitude: 48° 34' 17.31" Longitude: -80° 14' 29.52"
UTM Zone: 17 Easting: 555950.378 Northing: 5380098.14 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A09SE
Point Location Description: SHAFT, TRENCH
Location Method: Conversion from MDI
Access Description: Point Located: A point 3.92 km north and 2.12 km east of the southwest corner of Munro Township. The occurrence is within claim 848455, the northeast quarter of the south half of lot 10, concession III, Munro Township. Best access to the area is via the all terrain vehicle passable cleared area beneath the unused hydro line trending northeast from the Canadian Johns-Manville Co. Ltd. Munro (asbestos) Mine. The hydro line may be reached by following a 2 wheel drive vehicle passable dirt road trending northwest from the Munro Mine surface facility in southwest Munro Township. From the point where the dirt road intersects the old hydro line, the hydro line may be followed northeast for about 1,300 m, where a cleared 400 m long drilling road may be followed eastward to the stripped area.
1916: A shaft is reported (The Northern Miner, April 22, 1916) to have been sunk on the Falkenham property, which may have been, in part, the northeast quarter of the south half of lot 10, concession III, Munro Township. 1947: Big Games Mines Ltd. diamond drilled 1 hole totalling 1,051' in this area. 1952: By this time, Satterly (1952) reported that Big Game Mines controlled a contiguous 9 claim block in the area. In the northeast quarter of the south half of lot 10, concession III, Munro Township, Satterly reported that a 6 by 8 by 20 foot deep shaft (likely the Falkenham shaft) had been sunk on quartz-carbonate vein breccia within a Matachewan diabase dike. A weakly mineralized (chalcopyrite bearing) vein sample from the shaft area is reported (Satterly 1952) to have averaged 0.01 ounce of gold per ton. 1987: Stripping, trenching, and bedrock sampling by D. Lalonde (of Timmins) followed magnetometer and VLF electromagnetic surveys of 4 mining claims which represent a portion of a larger holding of claims in Munro Township. Most stripping and sampling was concentrated within claim 848455, where numerous gold assays greater than 0.01 ounce of gold per ton and several gold assays greater than 0.40 ounce of gold per ton are reported. Bruneau Mining Corp. optioned several of the Lalonde claims and diamond drilled 3 holes totalling 812.0 m to test at depth anomalous gold tenors exposed at surface by D. Lalonde. 1988: Bruneau Mining Corp. performed about $350,000 of geological mapping, geophysical surveys, and diamond drilling as of April 30 (The Timmins Daily Press, April 30, 1988). This included diamond drilling 13 holes.
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Archean
Metamorphism Grade: Greenschist
Dec 07, 2005 (C Salo) - Geological mapping (Satterly 1952; Johnstone and Trowell 1984, 1985; Jensen and Baker 1986; Johnstone 1987; Johnstone and Steele 1989; Vagners 1984; McClenaghan et al. 1987, 1988; Steele 1988) indicates that the occurrence area is underlain by weakly metamorphosed (greenschist or lower metamorphic facies) tholeiitic basalt of the (Archean) Stoughton-Roquemaure Group and is immediately north of the southeast striking Munro Fault Zone. The subcropping axial trace of a laterally persistent east southeast striking anticline occurs in the area. Cross faults oriented at high angles to the anticlinal axis (across which are developed apparent horizontal displacements of about 100 m) have been mapped northwest of the occurrence. Intrusive rocks in the area are limited to narrow (tens of metres in width) north striking (Proterozoic) Matachewan diabase dikes (Heaman 1989).
| Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Carbonatized Fe-Dol | Near |
|---|---|---|---|---|
| Mafic pillowed flow | 2 | Carbonatized Fe-Dol Basalt | Pillow | Host |
| Vein | 3 | Near | ||
| Vein | 4 | Fe-Dol-Cal | Host |
Dec 07, 2005 (C Salo) - AB-87-94: Muck grab. Rusty weathering perv. carbonatized (Fe-dol.) basalt cut by a 1.5 cm wide folded white qu-dol-green tour vein. 5-7% of fine to medium grained py, usually as elong. (stretched) spongy aggregates, occurs in the dolomitized basalt. 2-3% of med. grained acicular as occurs dissem. in the dolomitized basalt. The sample is weakly foliated. Where the py clots are cut by q-dol stringers, py is recrystallized and med. grained. Calc filled (late) hairline fractures cut a quartz vein. AB-87-96: Muck grab. 50% of deformed white q-Fe-dol vein material hosted by perv. carbonatized (Fe- dolomite) basalt. 5-7% of combined medium grained dissem. py and acicular as. Sulfides occur in both the carbonatized basalt and along irregular seams within the deformed vein. Carbonatized basalt is chloritic and schistose. Calc fills (late) hairline fracture in the qv. AB-87-97: Muck grab. 10-12% of coarse grained py and as in a perv. carbonatized (Fe-dolomite) basalt. Less than 15% of q-Fe dol vein material is present. AB-87-100:Muck grab. Irreg. white q-Fe-dol-green tour mass with 5 mm wide seams of mass. coarse grained py. Dissem. py and as marginal to the q mass occur as gossanous seams. 15-20% of sulfides are pres. AB-87-101: Outcrop chip. Micropillow breccia with less than 2cm size pillows and pillow frag. (lapilli?) supported by a cherty white q matrix. A void has been filled with microcrystalline finely laminated q (chalcedony). Basalt fragments are carbonatized. No sulfides. AB-87-102:Muck grab. Perv. carbonatized (Fe-dolomite)chloritic schist with medium grained subidioblastic py as 1 cm size clots. The py clots gener. have diffuse outer contacts with the enclosing carbonate schist. Very fine grained acicular as gener. occurs external to (and assoc. with?) the py clots. Rarely, slightly coarser grained interclot as is present. Note the presence of 1 cm wide q filled gashes. 10-15% of combined sulfides occur, dominantly as clots or clot ass.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Arsenopyrite | Economic | Ore | ||||
| 2 | Bornite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 1 | Carbonate | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue | ||||
| 3 | Tourmaline | Economic | Gangue | ||||
| 4 | Dolomite | Economic | Gangue | ||||
| 5 | Calcite | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | ||||
| Dolomite | Alteration | Dolomitization | 2 | ||||
| Chlorite | Alteration | Chloritic | 3 |
Dec 07, 2005 (C Salo) - Satterly (1952) rpted that: ...[in the NE quarter of the S half of lot 10, conc. III, Munro Twp] a shaft 6 by 8 by 20' deep has been sunk on a qc breccia vein cutting a Matachewan diabase dike. The vein strikes N.10E., and the dip is vert. It is exposed for a length of 50' and has a max. width of 2'. The rock fragments are presumed to be alt. dike rock. There is practically no sulfide mineralization, only a speck of cp being found. A grab sample of this slightly mineralized vein matter, on assay, gave 0.01 ounces Au per ton. (p.46) Free Au was also rpted to occur at the Falkenham shaft (The Northern Miner, April 22, 1916). Aurif. dissem. py.-a.py. is assoc. with q-dolead (all assays were less than 110 ppm of lead), and zinc (all assays were less than 128 ppm of zinc). One sample of cal alt. shear distal basalt returned a lower but still anom. Au assay (480 ppb of Au) and base metal tenors comparable to those obtained from the well mineralized samples. All analyzed samples contained highly anom. as tenors (as assays ranged from 0.05% in the sample obt. from cal alt. pillowed basalt to tenors consistently greater than 0.10% in the well mineralized samples from the stripped area proximal to the shear). The anom. elevated Au assays obt. from limited bedrock exposure justify further expl. of the occur. Further expl. should be directed toward: a) quantifying the size and shape of the sampled aurif. zone and the distrib. and continuity of Au values within it; b)estab. the relationship which the aurif. zone bears toward regional (and local) structural and stratigraphic elements (such as the Munro Fault Zone and the east southeast striking anticline which has been mapped to traverse the property (Johnstone and Trowell 1985)); c) determining at what stage during the tectonic/ hydrothermal history of the area the Au was introduced; and d) locating similar deposits based on the results of the above analysis, if warranted.
Folio - Munro Township, District of Cochrane
Publication Number: GDIF361 Date: 1997
Author: Kirkland Lake RGO
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, preliminary results of bedrock samples from the sonic drilling, 1985, Lake Abitibi-Matheson area, District of Cochrane
Publication Number: P2986 Scale: 1:100,000 Date: 1986
Author: Jensen L.S., Steele K.G., McClenaghan M.B., Baker C.L.
Publisher Name: Ontario Geological Survey
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:
Mono - Mineral occurrences, deposits, and mines of the Black River-Matheson area
Publication Number: OFR5735 Page: 1586-1596 Date: 1990
Author: Bath A.C.
Publisher Name: Ontario Geological Survey
Location:
Article - Precambrian geology of the Black River-Matheson (BRIM) area, District of Cochrane
Publication Number: MP119.050S Page: 278-282 Date: 1997
Author: Johnstone R.M., Trowell N.F.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, bedrock samples from the sonic drilling program 1987, Matheson area, District of Cochrane
Publication Number: P3114 Scale: 1:100,000 Date: 1989
Author: Johnstone R.M., Sutcliffe R.H., Steele K.G., Baker C.L., McClenaghan M.B.
Publisher Name: Ontario Geological Survey
Location:
Article - Quaternary geology and geochemical exploration in the Matheson area
Publication Number: MP136.294 Page: 200-214 Date: 1997
Author: McClenaghan M.B., Lavin O.P., Nichol I., Shaw J.
Publisher Name: Ontario Geological Survey
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:
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:
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:
Part - Geology of Munro Township
Publication Number: ARV60-08 Date: 1997
Author: Satterly J.
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:
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