Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F05SW00013

Record: MDI52F05SW00013

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Dogpaw Lake Area

Latitude: 49° 19' 42.02"    Longitude: -93° 50' 51.69"

UTM Zone: 15    Easting: 438406.49   Northing: 5464302.4    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F05SW

Point Location Description: Precise

Location Method: Conversion from MDI

Exploration History

1936: discovered by A. Gauthier while prospecting for Joseph Errington, who conducted trenching and 4 DDH completed on lake ice. 1943: claims restaked by N. Caswell and P. Williams and optioned to Noranda Mines Ltd. 1943-46: Noranda completed an exploration grid and drilled 46 DDH totalling approx. 2000 m. Noranda dropped the option in 1946. 1946: Wampum Gold Mines Ltd. acquired the property and sunk an initial shaft to a depth of 27 m on the Shaft Zone. Early 1950s: Dogpaw Gold Mines Ltd. sunk an additional shaft called the Falnora Shaft at the Shaft Zone to a depth of 40 m and constructed a 18 m north crosscut at the 38 m level. The patented claims were allowed to lapse. 1969: Gunnex Ltd. restaked the property and completed a ground magnetic and EM survey along the southern shore of Flint Lake, likely under a joint venture agreement with A.D. Zeemel. This work delineated two anomalies, however the property was relinquished without any further work. 1971: property was staked by P. Dubenski. 1973: Dubenski optioned the property to Noranda Exploration Company Ltd., who established a grid that duplicated the 1945 Noranda Mines grid and completed a program of geological mapping and two phases of drilling for a total of 27 DDH (2464 m). 1974: Noranda completed ground VLF, EM and magnetic surveys. No further work was done by Noranda. 1980-83: Property was optioned to Sherritt Gordon Mines Ltd., who completed a 16 DDH program totalling 1,217 m as well as a geochemical and ground EM and mag survey, geological mapping, and a trench/channel sampling program. 1983: Anyox Metals Ltd. contracted Norontex to prepare a qualifying report on the property, including a historical review of all work and compilation of drill data and calculation of a gold resource. 1984-88: Dubenski Gold Mines Ltd. explored the property, completing line cutting, hydraulic washing, prospecting, shaft dewatering and rehabilitation, trench channel sampling and diamond drilling (47 DDH, 6911.7 m in 1987 and 12 DDH, 759.5 m in 1988). A non-compliant mineral resource was calculated. 1996: Avalon Ventures Ltd. acquired the property and drilled a 14 DDH program totalling 2,788 m. 1997: Avalon established a new grid and completed a ground magnetic survey, geological mapping, soil sampling, as well as surface stripping and detailed geological mapping on the Shaft Zone trench. 1998: Avalon undertook an IP survey, a structural study and a thin section study as well as a 4 DDH program totalling 1507 m and a mineral resource calculation. 2007: Houston Lake Mining Inc. acquired the project, established a new grid over the deposit and conducted an IP survey. 2008: Houston Lake drilled 39 DDH totalling 4031.11 m and released a NI 43-101 compliant mineral resource. 2009: Houston Lake drilled 18 DDH totalling 2000 m. 2010: Houston Lake drilled 42 DDH totalling 6600 m. 2013: Coventry Resources acquired the West Cedartree Gold Project and relogged and resampled historic drill core. 2014: Chalice Gold Mines acquired the deposit from Coventry. 2016: First Mining Finance Corp acquired the property from Chalice.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Western Wabigoon

Belt: Kakagi-Rowan Lakes

Geological Age: Archean  

Geology Comments

Feb 09, 2011 (C Ravnaas) - The Property is located within the Archean Kakagi-Rowan Lakes greenstone belt within the Superior Province of the Canadian Shield. The volcanic-sedimentary formations within this northwest-trending belt, which have been wedged between batholithic complexes, have been folded into a synclinal structure called the Emm Bay Syncline. This structure has been subjected to multi-phase deformational events. The Emm Bay Syncline is truncated to the northeast by the northwest trending Pipestone-Cameron Fault, which is also referred to as the Pipestone-Cameron Deformation Zone (“PCDZ”). The volcanic-sedimentary formations within this belt have been folded into a synclinal structure called the Emm Bay Syncline, located to the south of the Property. This syncline structure plunges to the east-northeast. These formations have been intruded by the Stephen Lake diorite stock. The three deformation events affecting this belt consist of the following: D1: a syn-depositional localized folding that was produced during arc development due to sediment loading and to diapiric emplacement of synvolcanic intrusions; D2: formed a series of recumbent east-west trending folds and thrust faults, potentially during arc consolidation or pre- to early accretion; and D3: occurred during the accretion of the volcanic arc with the older Archean protocontinent to the northwest. (Reference from Mc Kay, B. Houston Lake Mining Inc., TECHNICAL REPORT AND UPDATED RESOURCE ESTIMATE ON THE DUBENSKI GOLD PROPERTY Dec 2009)

Lithology

Lithology Comments

Jan 21, 2015 (C Ravnaas) - The Property is underlain by felsic and intermediate volcaniclastic rocks with minor intercalated meta-sedimentary rocks of argillite, sandstone and chert with minor gabbroic intrusive rocks. Much of the stratigraphy strikes between 105° to 110° and dips sub-vertically. (Reference from Mc Kay, B. Houston Lake Mining Inc., TECHNICAL REPORT AND UPDATED RESOURCE ESTIMATE ON THE DUBENSKI GOLD PROPERTY Dec 2009)

Jan 21, 2015 (Therese Pettigrew) - The majority of the property is comprised of two sequences within the Kakagi Lake Volcanics: a lower coarse pyroclastic unit in the western part of the property and an upper unit consisting of dominantly felsic volcaniclastic rocks and fine-grained sedimentary rocks that are mainly exposed in the eastern part of the property. Several mafic sills forming part of the Kakagi Sills are also mapped within the area, as well as limited felsic intrusive rocks. Gold mineralization is mainly hosted by the upper, fine-grained sequence within strongly foliated and sheared rocks (Coventry Resources 2013 43-101).

Mineralization

Mineralization Comments

Jan 21, 2015 (C Ravnaas) - The Dubenski Gold deposit can be classified as a Precambrian epithermal greenstone-hosted vein deposit. Gold has been concentrated within the Dubenski Mineralized Zone (DMZ), a vertically dipping brecciated shear structure which has been traced for a strike length of approximately 1.0 km that parallels stratigraphy roughly following the south shore of Flint Lake. Rocks within the easterly striking DMZ were sheared prior to the introduction of the gold mineralization. Three zones (or deposits) of gold mineralization have been previously discovered within the DMZ. From west to east, these zones are the Shaft Zone, the Central Zone (consists of the Near Surface and Deep East zones) and the Peninsula East Zone. To date, the majority of exploration work and diamond drilling have been focused on the Shaft Zone, where gold mineralization occurs in association with silicification, pyritization and localized carbonatization hosted largely within sericite schist. The deposit consists of fine-grained free gold, concentrated along foliation planes within the 90 m wide zone of quartz-sericite-pyrite schist. Overall, the gold mineralized structure, referred to as the Dubenski Mineralized Zone (DMZ), dips vertical to steeply south, parallel to stratigraphy striking 105° to 110°, rather than the shearing direction which strikes 85° to 90°, dipping steeply north. Gold mineralization is concentrated within multiple pinch and swell zones / lenses or shoots of quartz-sericite schist (felsic to intermediate tuffs) in association with silicification and elevated pyrite mineralization. Not all silicified zones carry gold, and although gold is always associated with pyrite, the reverse is not always true. Typical accessory minerals to gold are black chlorite, quartz (± quartz and quartz-carbonate veins), sericite and occasionally trace amounts of fuchsite and chalcopyrite. (Reference from Mc Kay, B. Houston Lake Mining Inc., TECHNICAL REPORT AND UPDATED RESOURCE ESTIMATE ON THE DUBENSKI GOLD PROPERTY Dec 2009).

Jan 21, 2015 (Therese Pettigrew) - The Dubenski Gold Deposit has been traced along strike for a distance of 915 m. Visible gold is common throughout the deposit and occurs along foliation planes and, less commonly, as disseminations. It has been noted that arsenic is anomalous within the deposit, however, no arsenopyrite is visibly associated with the mineralization (Coventry Resources 2013 43-101).

Mineral Record Details

References

Publication - Revised Technical Report on the Cameron Gold Camp Project, Western Ontario, Canada

Publication Number: 2013 43-101 Date: 2013

Author: Lycopodium Minerals Pty Ltd

Publisher Name: Lycopodium for Coventry Resources

Location: SEDAR

Book - Northern Miner 85-09-30, p. 7

Publication Number: NMINER Date: 1996

Author:

Publisher Name: Northern Miner

Location:

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

Publication Number: MDC013 Page: 172-173  Date: 1971

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

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

MonoMap - Geology of the Cedartree Lake area, District of Kenora

Publication Number: R134 Page: 24-25  Date: 1976

Author: Davies J.C., Morin J.A.

Publisher Name: Ontario Division of Mines

Location:

Mono - Gold deposits of the Kenora-Fort Frances area, districts of Kenora and Rainy River

Publication Number: MDC016 Page: 12  Date: 1976

Author: Beard R.C., Garratt G.L.

Publisher Name: Ontario Division of Mines

Location:

Mono - Feasibility of small scale gold mining in northwestern Ontario (parts of the districts of Kenora, Rainy River, and Thunder Bay), volume 1, text, volume 2, appendices

Publication Number: OFR5332 Page: 29-30,B-4  Date: 1981

Author: Neilson J.N., Bray R.C.E.

Publisher Name: Ontario Geological Survey

Location:

Article - 1982 report of the Kenora Resident Geologist

Publication Number: MP107.001 Page: 3  Date: 1997

Author: Blackburn C.E., Hailstone M.H.

Publisher Name: Ontario Geological Survey

Location:

Map - Precambrian Geology Kakagi-Rowan Lakes Area

Publication Number: P3594 Scale: 1:50,000    Date: 2007

Author: Johns G.W.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Cedartree Lake area, District of Kenora

Publication Number: P0731 Scale: 1:15,840    Date: 1997

Author: Davies J.C., Morin J.A.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Map - Kenora-Fort Frances sheet, geological compilation series, Kenora, Rainy River districts

Publication Number: M2115 Scale: 1:253,440    Date: 1967

Author: Davies J.C., Pryslak A.P.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Kakagi Lake area, District of Kenora, Ontario

Publication Number: ARM42B Scale: 1:63,360    Date: 1998

Author: Burwash E.M.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Cedartree Lake, Kenora District

Publication Number: M2319 Scale: 1:31,680    Date: 1975

Author: Davies J.C., Morin J.A.

Publisher Name: Ontario Division of Mines

Location:

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