Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42C13SW00039

Record: MDI42C13SW00039

General

Commodities

Primary Commodities: Copper, Zinc

Location

Township or Area: Black River Area

Latitude: 48° 52' 41.61"    Longitude: -85° 51' 21.91"

UTM Zone: 16    Easting: 583871.81   Northing: 5414549.53    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42C13SW

Point Location Description: Blast pit, roadside outcrop

Location Method: Field Visit

Access Description: The Lampson Road zinc-copper occurrence is located approximately 26.5 km south of Manitouwadge on the south side of Lampson road approximately 1.4 km northeast of the junction with Highway 614.The occurrence is accessible via motor vehicle. From Manitouwadge, proceed south along Highway 614 for approximately 34 km to the Lampson road intersection. Proceed northeasterly along Lampson road for approximately 1.4 km to the vicinity of the occurrence. Zinc- and copper-bearing sulphides are exposed in a low-lying outcrop located adjacent to the south side of the road.

Exploration History

1957: Geological mapping; CPR (M. Bartley, T. Page). 1964-1965: Geological mapping; ODM (V.G. Milne). 1978-1979: Lake sediment and water geochemical sampling; GSC and MNR. Samples collected from the vicinity of the occurrence contained slightly anomalous amounts of Cu, Zn and Au. 1983: Airborne geophysical survey (HLEM, VLF-EM, MAG); Aerodat Ltd. 1985: Geological mapping; OGS (G.M. Siragusa and K.M. Chivers). 1989: Dighem airborne geophysical survey; Noranda Exploration Co., Ltd. and Noranda Minerals Inc. (Geco Division). 1991: Prospecting and lithogeochemical sampling which resulted in the discovery of the occurrence; prospectors B. and L. Brinklow. Lithogeochemical sampling; OGS (D.B. McKay). Reconnaissance till sampling; GSC (I.M. Kettles). Samples collected in the general vicinity of the occurrence were found to contain slightly anomalous amounts of Cu. 1992: Linecutting, geological mapping, lithogeochemical sampling, a ground geophysical survey (Deep EM) and diamond drilling (2 holes totalling 360.9 m); Noranda Minerals Inc. (Geco Division) and Noranda Exploration Co., Ltd. 1994: Noranda Minerals Inc. drilled 2 DDH totalling 213 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: Amphibolite

Geology Comments

Dec 07, 2005 (D McKay) - The Lampson Road zinc-copper occurrence is located in the Wawa Subprovince approximately 21.5 km north-northeast of the Hemlo gold mines. The area surrounding the occurrence is underlain primarily by a northeasterly-trending sequence of mafic to felsic metavolcanic and lesser metasedimentary rocks which comprise a portion of the the north limb of the Schreiber-Hemlo greenstone belt (Milne 1968, Maps 2146 and 2147; Siragusa and Chivers 1986, Map P.3046). In the vicinity of the occurrence, the belt has been folded into a large easterly-plunging syncline (Milne 1968, Map 2146). The occurrence is located along the north limb of this structure. The supracrustal rocks in this area are locally strongly foliated (094 degrees /70 degrees S) and mineral assemblages indicate they have experienced upper greenschist to lower amphibolite facies-grade regional metamorphism (Milne 1968; Charlton 1992). In the vicinity of the occurrence, the supracrustal sequence is approximately 7.5 km wide and is bounded to the north, south, east and west by granodioritic rocks of the Black-Pic Batholith, the Musher Lake Pluton, the Dotted Lake Batholith and the Gowan Lake Pluton, respectively (Milne 1968, Maps 2146 and 2147). The northern portion of the belt, in the vicinity of the occurrence is dominated by massive to pillowed basalts which contain minor metasedimentary interbeds (Milne 1968). The occurrence is located approximately 700 m south of the contact with the Black-Pic Batholith. Numerous, narrow, felsic dikes have intruded and locally brecciated the rocks hosting the occurrence. Medium- to coarse-grained, relatively massive amphibolites in the area may represent subvolcanic, gabbroic intrusions. The Jenny Creek Fault, a regional-scale, northerly-trending structure is located approximately 800 m west of the occurrence.

Lithology

Lithology Comments

Dec 07, 2005 (D McKay) - Field examinations have revealed that the occurrence consists of erratically distributed sulphides hosted in intercalated mafic metavolcanic and metasedimentary rocks The mafic metavolcanic rocks consist of fine- to medium-grained, moderately to locally strongly foliated (94 /70 S), dark gray-green, chlorite-hornblende schists. The metasedimentary rocks consist primarily of folded and faulted oxide-facies banded iron formation. Anhedral garnet porphyroblasts, up to 5 mm in diameter, may locally comprise up to 10% of the iron formation. The metasedimentary rocks form a band approximately 10 m wide within the volcanic sequence. A rusty, pyritic, biotite-sericite schist occurs within a 30 cm wide shear zone located near the contact between the metavolcanic and metasedimentary rocks. Numerous narrow, foliation-parallel and crosscutting quartz and quartz-epidote veins and veinlets occur in the area.

Mineralization

Mineralization Comments

Dec 07, 2005 (D McKay) - The sulphides appear to be confined to the iron formation and the mafic metavolcanic rocks located proximal to the iron formation. The mineralized zone is approximately 40 cm wide and can be traced along strike for approximately 5 m. The sulphides have undergone remobilization and generally constitute less than 1% of the rocks in which they occur. Fine-grained pyrite and chalcopyrite occur as very thin coatings along fractures and foliation planes within the iron formation. Sphalerite appears to be confined to the mafic metavolcanic rocks where it occurs in thin, erratically distributed, foliation-parallel seams and isolated patches associated with quartz. Grab samples collected from the occurrence in 1991 by D. B. McKay (OGS) and by prospectors L. and B. Brinklow returned assay values which varied from nil to 0.002 ounce Au/ton, nil Ag, 49 to 3250 ppm Cu and 27 to 13400 ppm Zn. Charlton (1992) provides the following comments regarding the occurrence: Mineralization in both mafic and intermediate volcanics typically takes the form of thin (1 to 2 metre) siliceous iron formations, and sheared volcanics, both typically with 1 to 5 percent pyrite. Both form gossans which are readily identified during field mapping. At this showing, occasional stringers of visible sphalerite could be found on shear planes and in the noses of small scale folds in highly schistose mafic volcanics along the south side of Lampson Road (Sheet 2), but detailed sampling yielded no significant metal values. The highest values obtained on the Brinklow showing were 0.01% copper and 0.15% zinc in a whole rock minor element sample. Grab sample assays from the Brinklow showing showed no significant values.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

Site Visit Information

Date: Feb 07, 1997

Geologist: A Mitchell

Notes: D. McKay, B. Schnieders, M. Smyk, T. Oja on 91/04/23 and 91/05/09 Grab samples collected from the occurrence by D. McKay and by prospectors L. Brinklow and B. Brinklow in 1991, returned the following assay results (Resident Geologist's files, Schreiber-Hemlo District, Thunder Bay): Sample Number: 91DBM-25 trace Gold (oz./ton), nil Silver (oz./ton), 296 Copper (ppm), 44 Zinc (ppm). 91DBM-26 nil Gold (oz./ton), nil Silver (oz./ton), 236 Copper (ppm), 32 Zinc (ppm). 91DBM-31 nil Gold (oz./ton), nil Silver (oz./ton), 328 Copper (ppm), 36 Zinc (ppm). 91DBM-32 nil Gold (oz./ton), nil Silver (oz./ton), 64 Copper (ppm), 176 Zinc (ppm). 91DBM-148 trace Gold (oz./ton), nil Silver (oz./ton), 592 Copper (ppm), 27 Zinc (ppm). 91DBM-149 nil Gold (oz./ton), nil Silver (oz./ton), 3250 Copper (ppm), 28 Zinc (ppm). 91DBM-150 0.002 Gold (oz./ton), nil Silver (oz./ton), 356 Copper (ppm), 30 Zinc (ppm). 91DBM-151 trace Gold (oz./ton), nil Silver (oz./ton), 60 Copper (ppm), 37 Zinc (ppm). 91DLB-01 nil Gold (oz./ton), nil Silver (oz./ton), 49 Copper (ppm), 13400 Zinc (ppm). 91DLB-02 nil Gold (oz./ton), nil Silver (oz./ton), 69 Copper (ppm), 140 Zinc (ppm). 91DLB-03 0.002 Gold (oz./ton), nil Silver (oz./ton), 119 Copper (ppm), 35 Zinc (ppm).

References

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

Map - Black River area, southwest part, District of Thunder Bay

Publication Number: P0334 Scale: 1:31,680    Date: 1997

Author: Milne V.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:

Map - Dotted Lake sheet, Thunder Bay District

Publication Number: M2146 Scale: 1:31,680    Date: 1968

Author: Milne V.G.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the Black River area, District of Thunder Bay

Publication Number: R072 Date: 1968

Author: Milne V.G.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Manitouwadge-Wawa sheet, geological compilation series, Algoma, Cochrane, Sudbury and Thunder Bay districts

Publication Number: M2220 Scale: 1:253,440    Date: 1972

Author: Milne V.G., Giblin P.E., Bennett G., Thurston P.C., Wolfe W.J., Giguere J.F., Leahy E.J., Rupert R.J.

Publisher Name: Ontario Division of Mines

Location:

Map - Geological series, Precambrian geology, White Lake (Hemlo) area, Dotted Lake and Black River sections, District of Thunder Bay

Publication Number: P3046 Scale: 1:15,840    Date: 1986

Author: Siragusa G.M., Chivers K.M.

Publisher Name: Ontario Geological Survey

Location:

Compend - Report of Activities 1992, Resident Geologists

Publication Number: MP161 Page: 121-165  Date: 1993

Author: Fenwick K.G., Pitts A.E., Newsome J.W.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office