Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F03NE00018

Record: MDI52F03NE00018

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Napanee Lake Area

Latitude: 49° 8' 28.8"    Longitude: -93° 8' 29.57"

UTM Zone: 15    Easting: 489676.185   Northing: 5443177.038    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F03NE

Point Location Description: Transfer

Location Method: Conversion from MDI

Access Description: A number of pits and trenches are located at the southwest end of Peep Bay on the northwest side of Manitou Stretch, 74 km south-southwest of Dryden. Road access to the property is from Hwy 502, along the Cedar Narrows Road to the landing on the Manitou Stretch. A short boat trip of about 18 km reaches the occurrences. The Peep Bay occurrence consists of eleven trenches and one pit, all within an area 350 m by 250 m. (OFR 5731, p.96)

Exploration History

1941: In a report of a visit by Noranda Exploration on property held by Goldale Mines Ltd. and Birch Bay Gold Mines, a sample from a quartz vein that hosted visible gold was reported to assay 0.46 ounce gold per ton over 2.4 feet (trench 8), and a sample from an arsenopyrite-bearing zone returned 0.10 ounce gold per ton over 17 feet (trench 3) (Assessment File 52F/03 NE, H-2, Resident Geologist's Office, Kenora). 1984-1985: Sparton Resources Inc. did ground VLF-electromagnetic, and magnetic, soil geochemical, and geological surveys. They re-trenched and channel sampled the old trenches. Sparton Resources Inc. diamond drilled 2 holes totalling 153.9 m. 1989: Homestake Mineral Development Co. did ground VLF-electromagnetic, magnetic, and IP surveys, a soil geochemical survey, and a geological survey. They cleaned out and chip sampled the old trenches.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Western Wabigoon

Belt: Eagle-Wabigoon-Manitou

Geological Age: Precambrian  

Lithology Comments

Feb 19, 2010 (C Ravnaas) - The occurrence is underlain by plagioclase-phyric melagabbro with 1% blue-quartz eyes, leucogabbro, pillowed and pillow brecciated intermediate metavolcanics, and quartz amygdaloidal mafic metavolcanic rocks. Eleven trenches are opened up on three different structures. Trenches 1, 3, 4, and 10 were opened up on a structure which strikes N045° and dips to the north. Three shear zones, here called Zones 1, 2 and 3, consist of anastomosing shears and intervening lithons. Alteration in the shear zones consists of dolomite, ankerite, sulphidization, calcite, and locally silicification, over a width of 1.5 m to 9 m. The zones appear to be discontinuous lenses of alteration over a minimum strike length of 330 m. Flat, short, extension quartz veinlets are observed in trenches 1 and 3 in the vicinity of the fissile shear. A narrow halo of sulphide envelopes these extension veinlets. Slickensides plunge in many directions. Pit 5a and trenches 6a and 6b were opened up on a second northeast trending structure which dips 75° to the northwest. Three fissile shear zones are identified. Alteration consists of sericite, chlorite, ankerite, calcite, and sulphides. A 4.5 m wide quartz vein in trench 6a connects with a 50 cm quartz vein in pit 5a over a length of 50 m (central shear vein). At trench 6b, a 30 cm wide quartz-filled shear connects with the shear exposed in trenches 5b and 9 over a minimum length of 150 m. Some flat quartz veins are present. Lineations plunge at 68° to the west-southwest. Trenches 5b and 5c, and trench 9, expose two S-shaped sigmoidal extension quartz veins which lie within the above mentioned shear structure. The width of the vein in trenches 5b and 5c varies from 12 cm to 80 cm, and the dip varies from 27° to 66° to the east. The shape of this sigmoidal extension vein combined with the lineation plunge and flat quartz veins, suggests a sinistral oblique-slip movement on the shear zone. In a third structure, trench 8 appears to have been opened up on a portion of a sigmoidal quartz vein from another shear zone lying to the northwest. The rock is very fissile and altered to calcitic sericite-chlorite-ankerite schists. (OFR 5731, p. 96-102)

Mineralization

Mineralization Comments

Nov 04, 2009 (D Scholtz) - In the first structure, mineralization is characterized by semi-massive sulphide bands and quartz-carbonate stringers and veinlets filling shears. Quartz veins are rarely observed. Quartz is white to medium grey, opaque, and granular in texture in places. Accessory minerals in the quartz veins are sulphide in amounts <1%, calcite, and muscovite. Sulphide minerals are arsenopyrite in amounts up to 15%, and pyrite in amounts up to 10%. In the second structure, the 4.5 m wide central quartz vein is light grey, semitranslucent to opaque, and characterized by ribbons of chlorite and patches of ankerite. No sulphide minerals were observed. The sigmoidal extension quartz vein is similar in color and texture to the central quartz vein. It contains some ribbons of sericite, and pyritized, sericitic and chloritic fragments, and wispy fractures filled with calcite and ankerite. Sulphide minerals are widespread in the wall rock, and consist of arsenopyrite in amounts up to 5%, and 27% pyrite. In the third structure the extension quartz vein is white to medium grey, opaque, fractured, and contains ribbons of chlorite, stringers of sulphide minerals, and patches of chlorite, sericite and ankerite. Arsenopyrite occurs as stringers or is associated with the chlorite ribbons, in amounts up to 3%. Analytical results indicate a correlation between amounts of gold, and antimony and arsenic contents. Fourteen grab samples were taken by the author from the first structure, from trenches 1, 3, 4 and 10. Gold is associated with sulphidized and iron carbonacized fissile rocks. This type of mineralization is identical to that at the Sorry Mac occurrences and the Gates Lake occurrence. The best result came from trench 1 where a sample returned 6100 ppb on analysis. Nine grab samples were taken by the author from the second structure, from trenches 5a, 6a and 6b. The best result came from trench 6a, where a sample returned 1630 ppb on analysis. Five grab samples were taken by the author from the sigmoidal extension quartz vein structure, from trenches 5b and 5c. The best sample came from trench 5c, where a sample returned 2910 ppb gold on analysis. Four grab samples were taken by the author from trench 8 with the best assay return being 3360 ppb gold. (OFR 5731, p. 96-102)

Jul 07, 2022 (Q Unknown) - Assay: 1.82 g/t Au from grab. 1941: In a report of a visit by Noranda Exploration on property held by Goldale Mines Ltd. and Birch Bay Gold Mines, a sample from a quartz vein that hosted visible gold was reported to assay 0.46 ounce gold per ton over 2.4 feet (trench 8), and a sample from an arsenopyrite-bearing zone returned 0.10 ounce gold per ton over 17 feet (trench 3) (Assessment File 52F/03 NE, H-2, Resident Geologist's Office, Kenora). 1984-85: Good assays came from trench 1, where a sample returned 0.27 ounce gold per ton over a 2 m width, trench 4 where a sample returned 0.15 ounce gold per ton over a 3 m width, and trench 6 where a sample returned 0. 15 ounce gold per ton over a 2 m width.

Mineral Record Details

References

Mono - Property visits by the Dryden area mineral commodity geologist, 1989

Publication Number: OFR5731 Page: 96  Date: 1990

Author: Delisle P.C.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office