Ontario Geological Survey
Permanent Link to this Record:
MDI32D04SE00013
| Record Name(s) | McGarry - 2006, Armistice - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1984-Mar-05 |
| Date Last Modified | 2023-Aug-16 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: McGarry
Latitude: 48° 7' 52.63" Longitude: -79° 35' 47.29"
UTM Zone: 17 Easting: 604430.002 Northing: 5331845.002 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 32D04SE
Point Location Description: Shaft
Location Method: Conversion from MDI
1945: Armistice Gold Mines Ltd. acquired the claims. Shaft sinking by Armistice Gold Mines Ltd. commenced. Flow ore was discovered on the 1250 foot level. 1974: Kerr Addison Gold Mines Ltd. optioned the claims from Sheldon Larder Mines Ltd. and drilled a deep hole with wedges. Equivalent units to the Kerr No.16 flow ore were reported. 1980: Denison Mines Ltd. optioned the property and drilled a single hole. 1986-1990: Armistice Resources Ltd. and later Armistice Resources Corp. optioned the property from Sheldon Larder Mines. The shaft was enlarged and deepened to 2250 feet. 1994-1999: 120,000 feet of diamond drilling, levels extended, scoping study 2004: major reorganization of the company. 2007: dewatering, diamond drilling, closure plan and development on the 2250 foot level.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| KL-0143 | 32D04NE0405 | 32D04NE0405 |
| KL-0024 | 32D04SE0041 | 32D04SE0041 |
Nov 21, 2011 (D Guidon) - from Andersen (2009) The McGarry Property lies astride the Larder Lake “Break”, which is a relatively narrow, highly disturbed linear zone over 200 km in length that extends from about Kirkland Lake in Ontario to Val d’Or in Quebec. It constitutes a steeply-dipping and strongly faulted lithostructural unit, consisting mainly of a series of interlayered metasediments and mafic to ultramafic volcanics. Occasionally, the system is displaced by crossfaults. In the area of the McGarry Project, the formational strike is 070° and the dip is from 70° to 80° to the north. The Larder Lake “Break” forms the southern margin of the Abitibi geosyncline which was formed during a period of profound orogenic adjustment during the Neo-Archean Period. This involved the collapse of an extensive marine basin to the north accompanied by the extrusion of the Blake River volcanics, intrusive activity, and the intense deformation of marginal rocks. The units of the Kerr Group of the Timiskaming Supergroup represent these marginal remnants. They are exposed at intervals along the “Break” locus and host numerous gold deposits of the region. Formational units of the Kerr Group in the Larder Lake area include intercalated grey to green carbonate rock, cherty mudstone, variably graphitic shale, sandstone, conglomerate and mafic to ultramafic volcanics. These appear to have been deposited in a volcanically active, shallow marine environment prior to geosynclinal collapse, resting on the tholeiitic to komatiitic volcanics of the Larder Lake Group. One interpretation is that gold, other metallic elements and silica, probably originating as weathering products from komatiites are believed by some to have become concentrated to varying degree in the carbonate rocks and cherty mudstones of the Kerr Group as part of the sedimentation process. During subsequent orogenic activity, the various formations making up the Kerr Group were pervasively faulted, variably metamorphosed and tilted to their present steeply dipping attitude. During this process, some limited redistribution of more mobile constituents took place. An alternate interpretation is that the gold and associated veining and mineralization of the area is of hydrothermal origin, emanating as volatiles from deep seated intrusive bodies and volcanic fissures. Although it is likely that the origin of the gold mineralization in the Virginiatown area will continue to be debated well into the future, it is considered that the hydrothermal model has strong supporting evidence. A hydrothermal model in which wide spread alteration processes including silicification and carbonization have been brought into a volcanic package that already contained gold-rich units is the one used as the foundation for all current geological interpretation at the McGarry Project.
| Rock Type | Rank | Composition | Texture | Relationship | Ultramafic lava flow-unsubdivided | 1 | Green-Carbonate | Near |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Pyritic | Pillow, Breccia | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Talc | Economic | Gangue | ||||
| 3 | Carbonate | Economic | Gangue | ||||
| 4 | Chlorite | Economic | Gangue | ||||
| 5 | Quartz | Economic | Gangue |
Nov 21, 2011 (D Guidon) - from Andersen (2009) Pyritic mudstone units (flow ore) constitute the most important gold-bearing zones at McGarry. Pyritic mudstone units appear to follow distinct formational horizons. Gold in such zones occurs mainly in intergrowth with pyrite and only sparingly in native form. The pyrite is medium to coarse grained and occurs in the cherty mudstones in disseminations varying from 1 to 25 percent of the rock volume. Minor quartz veining and silicification is commonly in evidence. Arsenopyrite and occasionally chalcopyrite may be present. A second gold-bearing mineralization type has similarities to the green carbonate ore at Kerr Addison. This style of mineralization was of lower grade at the Kerr Addison than the flow ore type. The pyrite content is in the 1 to 25% range. Gold distribution is probably the same as in the pyritic mudstones but has been locally concentrated into larger grains so that visible gold is more common. The overall gold distribution appears to have been dispersed over a larger and more poorly defined volume which lowers the average grade over mineable widths and lengths and, as a corollary, increases the internal dilution within potential stoping areas.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| McGarry | 2009 | Inferred Mineral Resource | 156036 | Andersen 2009 | 172 000 tons @ 0.17 opt Au | Gold 5.83 g/t |
| McGarry | 2009 | Indicated Mineral Resource | 446335 | Andersen 2009 | 492 000 tons @ 0.25 opt Au | Gold 8.57 g/t |
| Armistice | 2004 | Inferred Mineral Resource | 393700 | Armistice Technical Report June 6, 2004 | 433 981 tons @ 0.25 opt | Gold 8.57 g/t |
| Armistice | 1999 | Unclassified | 394528 | CMH 1999-2000, P.42 | Gold 8.57 g/t |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1997 | 7513 |
Gold 1035 Ounces |
OFR 6007 | Bulk samples 1995 & 1997 |
Part - Geology of McGarry and McVittie townships, Larder Lake area
Publication Number: ARV50-07 Page: 57 Date: 1998
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral resources and mining properties in the Kirkland Lake-Larder Lake area
Publication Number: MDC003 Page: 13 Date: 1964
Author: Savage W.S.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Gold deposits of Ontario, part 2, part of District of Cochrane, districts of Muskoka, Nipissing, Parry Sound, Sudbury, Timiskaming, and counties of southern Ontario
Publication Number: MDC018 Page: 150 Date: 1979
Author: Gordon J.B., Lovell H.L., de Grijs J.W., Davie R.F.
Publisher Name: Ontario Geological Survey
Location:
Mono - Preliminary report on the Timmins-Kirkland Lake area, gold deposits file
Publication Number: OFR5467 Page: G0144 Date: 1983
Author: Hodgson C.J.
Publisher Name: Ontario Geological Survey
Location:
File - Res/Reg Property Visit KL #356
Publication Number: PV-356 Date: 1901
Author:
Publisher Name:
Location: Kirkland Lake RGP office
Book - Technical Report and Mineral Resources Estimate, McGarry Project
Publication Number: Date: 2009
Author: Andersen, E.
Publisher Name: Armistice Resources Corp.
Location: SEDAR
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