Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52A05NE00011

Record: MDI52A05NE00011

General

Commodities

Primary Commodities: Silver

Secondary Commodities: Gold, Copper

Location

Township or Area: Oliver, Paipoonge

Latitude: 48° 23' 56.68"    Longitude: -89° 32' 43.68"

UTM Zone: 16    Easting: 311596   Northing: 5363788    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52A05NE

Point Location Description: Transfer

Location Method: Conversion from MDI

Access Description: Located on Pole Line Road approximately 300 m east of Mining Road.

Exploration History

Pre-1887: G. Garrow sunk a test pit 1.5 m deep on an ENE vein. Around 1925: stripping and test-pitting was carried out. No assessment files were found.

Geology

Province: Southern

Formation Group: Animikie Group

Geological Age: Paleoproterozoic  

Lithology

Mineralization

Mineralization Comments

Mar 23, 2018 (Shannon Zurevinski) - Mineralization occurs in quartz veins in the Animikie or Upper Gunflint Iron Formation. Chalcopyrite occurs. Best assay 549 g/t (16 opt) Ag. The vein was traced for 61 m (Sergiades, 1968).

Jul 29, 2019 (Therese Pettigrew) - Composite veins, possibly belonging to one system, occur on the south half of lot 11, concession 1, Oliver township. This property was owned by Mr. T. Kellow who stated that a test pit 5 feet deep was sunk on one of the veins prior to 1887 by Mr. George Garrow who formerly owned the property. A small amount of stripping and test-pitting had been done in years just before 1928 in the vicinity of the outcrops. The veins occupy fault zones in interbedded shaly and cherty phases of Animikie iron formation. One group of outcrops occurs east of the southwest corner of lot 11, where a composite vein 35 feet wide crosses the road from lot 29, concession 3, Neebing township, and can be traced north 65 degrees east for approximately 200 feet. At this point a test pit 4 feet deep shows numerous tiny veinlets, some striking north 65 degrees east and some due east. The country rock is iron formation, locally folded and faulted, but with a general dip of 25 degrees toward the south. The composite vein consists of a multitude of tiny quartz veinlets and a few longer veinlets 2 inches wide. At certain points several veins unite and have aggregate widths up to 6 inches. The vein material makes up approximately 10 percent of the cemented fault zone. Nine-tenths or more of this material is white crystalline quartz. Chalcopyrite occurs abundantly in certain tiny veinlets that ramify through the iron formation exposed in the test pit, and here makes up about one-tenth of the vein material. The owner reported that an assay, made in 1925, of the chalcopyrite-bearing material from the pit, yielded gold at the rate of $3 to the ton, and silver 16 ounces to the ton. Three hundred feet northwest of the southeast corner of lot 11, a composite vein, 12 feet wide, has been stripped over a length of 20 feet. The country rock is black chert and a shaly phase of the iron formation. The rock dips 20 degrees toward the south. The composite vein consists of a multitude of tiny veinlets up to one-half inch in width showing a general trend approximately east. The vein material consists of white, smoky, and amethystine quartz crustified on the walls of the veinlets. Crystalline aggregates of galena up to one-quarter inch in diameter are sparsely disseminated through some of the wider veinlets. It is inferred that this composite vein is the easterly extension of the composite vein observed in the pit one-quarter mile west of this point. In the field of arable land, 250 feet northeast of the southwest corner of lot 11, occurs a vein on which a 4-foot pit was sunk prior to 1887. The country rock is fiat-lying black shale and cherty iron formation. The vein strikes north 15 degrees west and dips vertically. It is exposed over a distance of only 5 feet, is 1 foot wide, and consists of finely crystalline white quartz. Possibly this vein joins the first-mentioned composite vein lying less than one-quarter mile southeast (Tanton, 1931). Samples collected in 1992 by the OGS field crew returned an assay of 872 ppm Cu. Brecciated fragments of chert, siltstone and mudstone occur cemented by calcite and crystalline quartz, locally showing varying degrees of amethyst coloration. Malachite and pyrite, both generally less than 1% by volume, and up to 2% chalcopyrite are present as fine fracture fillings and as small blebs within the brecciated zone (Brown, 1995).

Mineral Record Details

References

Map - Kakabeka Sheet, Thunder Bay District, Ontario

Publication Number: Map 213A Scale: 1:63,360    Date: 1928

Author: Tanton, T.L.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/107463

Mono - Silver cobalt calcite vein deposits of Ontario

Publication Number: MDC010 Page: 77  Date: 1968

Author: Sergiades A.O.

Publisher Name: Ontario Dept. of Mines

Location:

Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167

Publication Number: GSC Memoir 167 Page: 141-142  Date: 1931

Author: Tanton, T.L.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/100799

MonoMap - Precambrian Geology, Oliver and Ware Townships

Publication Number: R294 Page: 42  Date: 1995

Author: Brown G.H.

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