Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42M12SW00004

Record: MDI42M12SW00004

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Silver

Location

Township or Area: Reserve Lake Area

Latitude: 51° 33' 11.59"    Longitude: -87° 47' 54.02"

UTM Zone: 16    Easting: 444650   Northing: 5711649.99    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42M12SW

Point Location Description: TRENCH, from OFR 5926 p. 206

Location Method: Data Compilation

Access Description: Located on Eabametoong first nation lands (reserve #64) 163 km east of Pickle Lake, 163 km northeast of Armstrong, 170 km northwest of Nakina and 11 km east-southeast of the community of Eabametoong (Fort Hope First Nation).

Exploration History

1960: Little Long Lac Gold Mines Ltd. prospectors Johnson and Reid uncovered new quartz veins in the area and panned gold from pits they blasted. Little Long Lac conducted a Trenching program, ground MA. 1961: Little Long Lac conducted a 27 AXT ddh totalling 2160 m (21 holes in the A Zone and 6 holes in the B Zone), detailed geological mapping. 1963: Zulapa Mining Corporation Ltd. acquired the Little Long Lac claims north of Reserve Lake and conducted a 51 DDH program, totalling 10 073 feet. 1976: Zulapa went into receivership.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Miminiska-Fort Hope

Geological Age: Neoarchean  

Geology Comments

Jul 18, 2006 (C Salo) - The Zulapa prospect area has been described by Darling (1962) as being underlain by a series of acid and basic rocks oriented at approximately 250/60 and located immediately north of the main Reserve lake granite. oja (1963) described the rocks of the area as primarily biotite-quartzite (i.e., metasedimentary) intruded by sericitized quartz porphyry bodies. The quartzite was reported to have a strong magnetic response, while the porphyry coincides with magnetic lows. This deposit is loacted along strike with the nearby Reserve Creek Occurrences (MDI42M12SE00008). However, gold mineralization at the Zulapa appears to be associated with quartz veins in late-stage brittle fractures (in the competent felsic rocks) that have the following dominant orientations: 270/55 and 080/90. The type of mineralization reported at the Zulapa Prospect (visible gold associated with pyrite, chalcopyrite, magnetite, pyrrhotite, sphalerite and galena), the occurrence of mineralization in rocks described by Oja (1963) as porphyry intrusions, and the proximity of the deposit to a larger felsic intrusion indicate the possibility that this occurrence may be of the alkalic porphyry type described by Rogers et al. (1995).

Lithology

Mineralization

Mineralization Comments

Jul 18, 2006 (C Salo) - Gold mineralization in the vicinity of the Zulapa Prospect was reported by Darling (1962) to have been found in numerous quartz veins located in an area approximately 300 m long by 120 m wide. The mineralized quartz veins are associated with two fracture systems oriented at approximately 270/55 and 080/90. Gold mineralization was further reported to be largely confined to altered, sericitized, porphyritic dacite (or quartz porphyry intrusions). Sulphide minerals including pyrite, chalcopyrite, sphalerite and galena were also reported to be associated with the gold. Magnetite and pyrrhotite occur largely outside of the sericitic gold-mineralized zones. The relatively complex stockwork of veins that characterize the Zulapa deposite was reported by Oja (1963) to make it difficult to obtain a reliable ore grade estimate. He nevertheless estimated the drill indicated deposit to consist of a minable potential of 170,000 tons to a depth of 300 feet and 300,000 tons to a depth of 700 feet. IN their 1970 Annual Report, Zulapa Mining Corporation estimated drill-indicated reserves of 170,000 tons grading 0.28 ounce Au per ton to 300', plus additional tonnage to 700.'

Aug 27, 2014 (Therese Pettigrew) - In the A Zone, gold occurs associated with pyrite and chalcopyrite. In the B Zone, gold occurrence is associated with pyrite, chalcopyrite, sphalerite and galena. Ore shoots lie “en echelon” along the A Zone with erratic gold values. The B Zone appears to be a simple, regular, fracture system with a highgrade narrow quartz vein and a wider basalt dyke injection alternately pinching and swelling along the sericitized fracture zone (Darling, 1962 AFRI 42M12SW0006). Darling (1962) reported the following assayed values from the 1961 drill program: A Zone values : DDH A-1 : 31.0-42.6’ – 0.177 oz/t Au, A-3 : 42.3-53.8’ – 0.179 oz/t Au, A-7: 61.3-95.0’ – 0.216 oz/t Au, A-8: 72.6-81.0’ – 0.216 oz/t Au, A-9: 41.7-45.0’ – 0.337 oz/t Au, A-10: 127.0-181.4’ – 0.200 oz/t Au, A-11: 219.5-233’ – 0.163 oz/t Au, A-12 : 152.7-162.3’ – 0.136 oz/t Au, A-15 : 8.4-39.2’ – 0.304 oz/t Au, A-24: 168.5-175.0’ – 0.362 oz/t Au, A-25: 153-193.2’ – 0.425 oz/t Au. B Zone values : DDH A-18 : 48.0-81.6’ 0.275 oz/t Au, A-17 : 110.0-115.3’ – 0.495 oz/t Au. Oja (AFRI 42M12SW0006) reported the following assays from the 1963 drilling program : Z-1: 6.0’ width – 0.46 oz/t Au, Z-2: 1.5’ width – 1.11 oz/t Au, Z-14: 2.5’ width – 4.70 oz/t Au, Z-16: 1.0’ width – 2.11 oz/t Au, Z-20: 1.5’ width – 0.63 oz/t Au, Z-23: 1.0’ width – 0.54 oz/t Au, Z-24: 2.0’ width – 0.62 oz/t Au.

Mineral Record Details

References

Map - Fort Hope area, District of Kenora (Patricia Portion), Ontario

Publication Number: ARM51B Scale: 1:63,360    Date: 1997

Author: Prest V.K.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Fort Hope-Lansdowne House sheet, geological compilation series, Cochrane, Kenora, and Thunder Bay districts

Publication Number: M2237 Scale: 1:253,440    Date: 1972

Author: Thurston P.C., Carter M.W., Riley R.A.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay

Publication Number: MDC013 Page: 225-226  Date: 1971

Author: Ferguson S.A., Groen H.A., Haynes R.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Mono - Mineral Occurrences and Prospects in the Fort Hope-Winisk Area

Publication Number: OFR5926 Page: 204-209  Date: 1995

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

Publisher Name: Ontario Geological Survey

Location:

Part - Geology of the Fort Hope gold area, District of Kenora (Patricia Portion)

Publication Number: ARV38-02.001 Date: 1998

Author: Burwash E.M.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Geology of the Fort Hope area

Publication Number: ARV51-03.001 Date: 1997

Author: Prest V.K.

Publisher Name: Ontario Dept. of Mines

Location:

Book - OPERATION FORT HOPE, p. 49-50

Publication Number: MP042 Page: 49-50  Date: 1970

Author: Thurston, P.C. and Carter, M.W.

Publisher Name: Ontario Dept of Mines and Northern Affairs

Location:

Map - Geological Compilation of the Miminiska-Fort Hope Area, Eastern Uchi Domain

Publication Number: P3611 Scale: 1:250,000    Date: 2009

Author: Madon Z.B., McIlraith S.J., Stott G.M.

Publisher Name: Ontario Geological Survey

Location:

Map - Fort Hope area, District of Kenora (Patricia Portion), Ontario

Publication Number: ARM38B-01 Scale: 1:190,080    Date: 1997

Author: Burwash E.M.

Publisher Name: Ontario Dept. of Mines

Location:

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.

Terms of Use

Please review our Terms of Use agreement for this data product.

Ministry Contact Information

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