Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42A10SE00002

Record: MDI42A10SE00002

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Clergue, Stock, Walker

Latitude: 48° 37' 39.1"    Longitude: -80° 41' 22.04"

UTM Zone: 17    Easting: 522882.82   Northing: 5386097.67    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 42A10SE

Point Location Description: Smooth polished outcrops on the east bank of the Driftwood River

Location Method: Data Compilation

Access Description: Access to the site is best achieved via the road lying along the boundary between Clergue and Walker townships. A field vehicle may be parked on the road shoulder about 400 m south of its intersection with Highway 11, near Monteith. From here, a cleared field (containing cattle in 1986) must be crossed to its west end, where a 30 m long northwest trending trail may be followed to the east bank of the Driftwood River, where several square metres of smooth, glacially polished outcrop are exposed.

Exploration History

1938-39: Consolidated Montclerg Mines Ltd. a landslide along the shore of the Driftwood River exposed an auriferous quartz vein breccia, 16 diamond drill holes were completed totaling 2230 ft. 1938: Hollinger Consolidated Gold Mines completed 10 diamond drill holes. 1942: Montclerg Mines, Newmont Mining Corp, Anglo Huronian Ltd and Howey Gold Mines Ltd. completed 46 diamond drill holes totaling 27 783 ft, and ground geophysics. 1959-60: Montclerg Mines Limited completed 12 diamond drill holes 9276 ft. 1964-65: L. Torrance completed 12 diamond drill holes totaling 5990 ft. 1966: Consolidated Montclerg Mines Ltd. completed 10 diamond drill holes totaling 3000 ft. 1974: Mulliette-Bell carried out ground magnetometer and EM surveys. 1980-81: Consolidated Montclerg Mines carried out ground geophysics and a property survey. 1986: Montclerg Resources Ltd. Carried out an IP survey, and 3 diamond drill holes totaling 1440 ft. 1987: Bruneau Mining Corp completed a compilation of drilling data. 1987: Canamax Resources Ltd. Completed 19 diamond drill holes totaling 4152 m. 1999: Pentland-Firth completed 8 diamond drill holes totaling 1644 m. 2002: Pentland Firth Ventures Ltd. completed assays from 8 diamond drill holes (1644m), as well as geochemistry, geology, and sampling. .2006-07: Matamec Explorations Inc. acquired the property and completed 12 diamond drill holes. 2013: International Explorers and Prospectors Inc. carried out an IP survey.

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Abitibi

Tectonic Assemblage: Kidd-Munro

Geological Age: Archean  

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (A Wilson) - It is likely that the Montclerg deposit is associated with a northeast-striking fault rather than the Pipestone Fault as was previously believed. Several NE-striking faults are geophysically inferred in this part of Clergue Township.

Apr 21, 2016 (C Salo) - The Montclerg deposit is hosted by weakly metamorphosed (greenschist or lower metamorphic facies) mafic volcanic and felsic volcanic and/or intrusive rocks within and/or north of the Pipestone Fault Zone. The Pipestone Fault Zone is a regional scale structure which, along much of its length, defines and/or is spatially associated with the contact between east striking and steeply dipping (metamorphosed) volcanic rocks of the (Archean) Stoughton-Roquemaure Group (to the north) and east striking and steeply dipping (metamorphosed) clastic sediments of the (Archean) Porcupine Group (to the south). Johnstone and Jensen and Langford have termed the eastern extension of the Pipestone Fault Zone the Middle Branch of the Porcupine-Destor Fault Zone.

Lithology

Lithology Comments

Apr 21, 2016 (A Wilson) - Diamond drilling outlined an east-northeast-striking alteration zone approximately 1300 m by 130 m. Gold mineralization occurs throughout this alteration zone, however the best gold values were associated with arsenopyrite and less commonly with pyrite only along the north contact between quartz-feldspar porphyry and mafic metavolcanic rocks only west of the Driftwood River. In the Montclerg and Canamax zones, that is, the southern part of the Kidd-Munro assemblage, the main rock types are basalt A, rhyolite, dacite, QF porphyry (so named because quartz > feldspar), ferrobasalt, komatiite and alkaline felsic porphyries.

Apr 21, 2016 (C Salo) - The strike of the auriferous body is N 70-75 degrees east with a steep dip to the north. West of the river, values are found in and near a quartz feldspar porphyry dike about fifty feet wide. The dike is parallel to the flows through which it cuts. In places the lavas, which vary from dacite to basalt, are completely altered to silica and feldspar in bands. Gold is associated with arsenopyrite which occurs in needle-like crystals. The discovery [surface showing] is in volcanic breccia- in a small outcrop on the southeast bank of Driftwood River. It consists of irregular quartz stringers and altered rock. The holes to the west of the river showed an intrusive porphyry striking about parallel to the flow structure of the Keewatin [volcanic stratigraphy] or roughly east-west. In and along the north side of the porphyry, interesting gold values were found east of the river. The rocks are basic lavas much sheared, altered and mineralized. No porphyry has been cut east of the river. There is much alteration to feldspar. It would seem that the porphyry plunges to the east (from a 4 report dated May 16, 1939 by W.H. Emens) The rocks intersected were basic lava flows of the composition of about andesite, but some of the flows have been silicified, and in places porphyritized, along a zone having an average width of about 175 feet. It is this silicified material which mainly constitutes the auriferous zone. Although most of the gold occurs in the silicified [Pipestone Fault?] zone north of the fault yet there is some gold within the confines of the fault itself, as for example in Hole No.26 where low values were found near the hanging wall at about 1,300 feet.(from a cover letter dated Feb., 1942 from C.W. Knight describing his logs of the Montclerg Mines drill core).

Mineralization

Mineralization Comments

Apr 21, 2016 (A Wilson) - Assays from the original discovery reportedly returned values of 0.13 oz./t Au. A diamond drill hole completed in 1939 returned an assay of 28.15 oz./t Au over 2 ft. Grab samples from the gold-bearing quartz veins ranged from 4 to 7 g/t Au. The property contains two gold-bearing zones. The historic Montclerg deposit was discovered in 1938. The deposit is 400 m north of the pipestone Fault and is in the same mafic/ultramafic volcanic lithologies as the majority of gold deposits in the Timmins Camp. Pentland Firth’s examination of the discovery outcrop indicates one vein set oriented at 080º/30º S and a second vein set at 360º/90º which suggest an optimum drill azimuth of 045º in order to intersect both vein sets. The second gold-bearing zone is the CMX Zone discovered by Canamax in 1987. The deposit is situated along the southern margin of the Pipeston Fault and is spatially related to the occurrence of a quartz-feldspar porphyry intrusion. The mineralization is contained in quartz-ankerite-arsenopyrite veins.

Alteration Comments

Jun 26, 2012 (D Draper) - Alteration minerals chlorite and sericite were noted for this deposit and were originally listed in the Minerals section of this record. However due to validation errors caused by the database transfer to LIO4, they had to be deleted from the list.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Fault

References

File - Resident Geologist files T-2693, T-4704

Publication Number: Date:

Author:

Publisher Name:

Location: Timmins RGP office

Folio - Clergue Township, District of Cochrane

Publication Number: GDIF400 Date: 1997

Author: Kirkland Lake RGO

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: MDC013 Page: 5151  Date: 1971

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

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Article - Report on the St. Andrew goldfields deposit, the Clavos gold deposit, and the Montclerg gold prospect, District of Cochrane

Publication Number: MP132.082 Date: 1997

Author: Malczak J.

Publisher Name: Ontario Geological Survey

Location:

Book - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario

Publication Number: GSC OF 1087 Page: 121  Date: 1985

Author: Rose, D.G

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/129999

Mono - Mineral occurrences, deposits, and mines of the Black River-Matheson area

Publication Number: OFR5735 Date: 1990

Author: Bath A.C.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology of the Monteith Area

Publication Number: OFR6024 Page: 42  Date: 2000

Author: Berger B.R.

Publisher Name: Ontario Geological Survey

Location:

Map - Iroquois Falls-Lake Abitibi sheet, District of Cochrane

Publication Number: P0140 Scale: 1:126,720    Date: 1997

Author: Savage W.S., Thomson R., Fenwick K.G.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Timmins data series, Clergue Township, District of Cochrane

Publication Number: P2335 Scale: 1:15,840    Date: 1980

Author: Hunt D.S., Richard J.A., Carey E.R.

Publisher Name: Ontario Geological Survey

Location:

Map - Clergue Township, District of Cochrane

Publication Number: P0308 Scale: 1:15,840    Date: 1997

Author: Carlson H.D., Ginn R.M.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Precambrian Geology, Monteith Area

Publication Number: P3367 Scale: 1:50,000    Date: 1997

Author: Berger B.R.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological Compilation of the Lake Abitibi Area, Abitibi Greenstone Belt

Publication Number: P3398 Scale: 1:100,000    Date: 1999

Author: Ayer J.A., Berger B.R., Trowell N.F.

Publisher Name: Ontario Geological Survey

Location:

Publication - Revised Technical Report on Montclerg Project, Porcupine and Larder Lake Mining Divisions, Ontario, 22p

Publication Number: Date: 2006

Author: G.A. Harron

Publisher Name: SEDAR

Location: Timmins RGO

Publication - Structural investigation and mineral potential of the Kidd-Munro assemblage in Clergue and Walker Townships

Publication Number: Cur Res 2008-23 Date: 2013

Author: E. Dinel, W. Bleeker, J. Ayer, B. Dubé

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/226206

Data - The Montclerg Gold Deposit, Abitibi Greenstone Belt, East Timmins Region, Ontario: Stratigraphy, Lithogeochemistry, Mineralization and Nature of Vein Fluids

Publication Number: MRD300 Date: 2013

Author: Barrett T.J., Wilson G.C., Hamilton M.A., Kontak D.J., Burns M., Ayer J.A., Stott G.M.

Publisher Name: Ontario Geological Survey

Location:

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