Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E12NE00013

Record: MDI42E12NE00013

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Walters

Latitude: 49° 43' 53.29"    Longitude: -87° 38' 45.28"

UTM Zone: 16    Easting: 453452.282   Northing: 5508975.135    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42E12NE

Point Location Description: Trenches, diamond drill holes.

Location Method: Conversion from MDI

Access Description: The claims are located in southeastern Walters Township on the north shore of Nissiamkikan Lake. The properties can be reached by travelling northwest on secondary Highway 801 from Nezah (10.1 km west of Jellicoe) for 1.3 km, then northeast on a bush road for approximately 1.37 km. The properties are located about 1.29 km to the east.

Exploration History

1934: T.C. McCullough staked the property covering the occurrence. 1935: The claims were transferred to Dumond Exploration. Surface prospecting and trenching were done. 1937-50: A number of extensions were granted before the claims were finally cancelled. 1950: The east and west properties were staked. 1952-53: The claims were cancelled. 1960: The east and west claims were restaked and transferred to Strathcona Mines Ltd. 1961: The claims were cancelled. 1962-1974: The claims were cancelled and staked numerous times. The east claim was covered by geological, magnetic and EM surveys as part of the Stolove-Van Orman-Pappas claim block in 1966, and in 1968 was transferred to Solomon's Pillars Mines Limited. The claim was cancelled in 1969, restaked, and transferred to INCO, which drilled three holes on the claim. The claim was cancelled the following year, and restaked in 1973. 1974: The west property was staked and transferred to INCO. 1976: Both clains cancelled. 1980: The properties were staked by David Thorsteinson. 1984: A grid was cut, and mag and EM surveys were conducted. 1986: Claims held by David Thorsteinson.

Geology

Province: Superior

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (B Nelson) - In the south half of Walters Township the rock consists mainly of Timiskaming greywacke, some conglomerate, and minor bands of arkose. The greywackes overlie an older series of basic lavas, now ellipsoidal-weathering greenstones and derived schists. These are part of the Keewatin series. One narrow but prominent ridge of these basic rocks outcrops east-west across the south half of Walters Township. Minor Post-Timiskaming diabase dykes, striking almost north-south occur in the southeast corner of the township. These probably occupy shear zones and faults. The east-west strike and almost vertical dips of the greywacke appear to be fairly consistent throughout. The sediments appear to abut the massive greenstone belt along both the north and south contact. Shearing and soft deep-weathering altered greywacke was observed in a few places on the northern contact. The southern contact lies in a swamp. The contact is probably a fault on both sides of the greenstone ridge. Another main shear zone runs east-west about half a mile to the south. This is a bedding plane shear. Secondary shears across stike also occur. These run northwest and northeast, at 45-60 degrees to the main east-west shears. Mineralization was found in the main east-west shear area in two old trenches about 700 feet north of Nissiamkikan Lake. Sediments dip 85 degrees to the north. A quartz vein 2 to 4 inches wide runs along the northern hanging wall of the shear zone. It is coarsely crystalline and shows ladder type fractures across its width. The fractures are heavily stained by hematite. Small specks of carbonate can be seen in the quartz. The shear proper is about 6 feet wide. The rock is very soft and rich in iron. Remnant bedding of slaty greywacke can be seen. Weathering is very deep and it is impossible to reach fresher rock by trenching.

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - Although the composition changes in the greywacke are mainly gradational, some bands are so rich in iron that they are classed as separate units--Iron Formation. One such band runs east-west through the southern end of Walters Township. Some beds (in the bedding plane shear) with a higher silica content have resisted the shear stresses better than others. These have recrystallized and silicified to a considerable degree, with development of chloritic slip planes. In the softer beds, movement along bedding planes has been more intense. The rock is fractured and ground up in the bedding plane shears. Small flattened and elongated pebbles are found in the soft, deep weathering shears.

Mineralization

Mineralization Comments

Dec 07, 2005 (B Nelson) - Bordering the quartz vein, the sediments in the shear have been replaced 30%-50% by py, asp, and minor cp. The replacement zone varies in width from 2 to 4 inches. The foot wall of the shear also has some quartz vein mineralization and small lenses of sulphide replacement beside it. But on the foot wall, the mineralization appears to be much less and inconsistent. The quartz vein material has assayed 0.02 oz/ton Au. The replacement zone has yielded values from 0.26 to 0.85 oz/ton Au. The average grade over the exposed length of 6.1 m is estimated as 0.45 oz/ton Au. Irbe (1960) states that rusty weathered material assays 0.03 oz/ton Au over a width of 1.8 m. However, surface enrichment by concentration probably gives higher than the actual content of gold in the shear. The shear has likely been permeated by minute traces of sulphides along bedding laminae, as has been observed in other places in fresher rock. The sulphides carry traces of gold as coating and fracture fillings.

Mineral Record Details

References

Book - NMINER HIST FILE T.BAY

Publication Number: N/A Scale:     Date:

Author:

Publisher Name:

Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts

Publication Number: M2102 Scale:     Date: 1997

Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.

Publisher Name: Ontario Dept. of Mines

Map - Walters and Leduc townships, Thunder Bay District

Publication Number: M2356 Scale: 1:31,680    Date: 1976

Author: Mackasey W.O.

Publisher Name: Ontario Division of Mines

MonoMap - Geology of Walters and Leduc townships, District of Thunder Bay

Publication Number: R149 Scale:     Date: 1976

Author: Mackasey W.O.

Publisher Name: Ontario Division of Mines

Map - Thunder Bay data series, Nezah Lake area, Thunder Bay District

Publication Number: P2517 Scale: 1:15,840    Date: 1982

Author: Speed A.A.

Publisher Name: Ontario Geological Survey

Mono - Gold occurrences, prospects, and deposits of the Beardmore-Geraldton area, districts of Thunder Bay and Cochrane

Publication Number: OFR5630 Scale:     Date: 1986

Author: Mason J.K., White G.D.

Publisher Name: Ontario Geological Survey

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