Ontario Geological Survey
Permanent Link to this Record:
MDI32E13NE00011
| Record Name(s) | Placer Dome DDH 519-055 - 1996, Placer Dome DDH 519-056 - 1996 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2003-Nov-12 |
| Date Last Modified | 2022-Jul-15 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Lower Detour Lake Area
Latitude: 49° 57' 13.97" Longitude: -79° 39' 31.54"
UTM Zone: 17 Easting: 596212.997 Northing: 5534364.998 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 32E13NE
Point Location Description: Drill hole collar
Location Method: Based on Assessment
Access Description: Access to the property is by fixed wing aircraft from Cochrane, or by all terrain vehicle from the Detour Lake Mine site. Detour Lake Mine is accessible by an all-season road from Cochrane.
1980-83, 1985, 1989-90: Western Mines Ltd./Westmin Res. - airborne and ground geophysics, humus geochemistry, diamond and overburden drilling. 1994-97: Placer Dome Canada Limited - airborne and ground geophysics, diamond drilling. 2004: Conquest Resources Limited - geochemical survey
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-3436 / 2.16492 | 32E13NE0019 | 32E13NE0019 |
| T-3436 / 2.18114 | 32E13NE2001 | 32E13NE2001 |
| T-5289 / 2.31188 | 20000001070 | 20000001070 |
| T-2331 / 2.5962 | 32E13NE0057 | 32E13NE0057 |
| T-2331 / 2.4903 | 32E13NE0077 | 32E13NE0077 |
| T-2331 | 32E13NE0010 | 32E13NE0010 |
| T-2331 / 2.13395 | 32E13NE0004 | 32E13NE0004 |
| T-2331 / 63.4622 | 32L04SE0007 | 32L04SE0007 |
| T-3436 / 2.15942 | 32E13NE0008 | 32E13NE0008 |
| T-2331 / 2.3651 | 32E13NE0091 | 32E13NE0091 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Neoarchean
Mar 25, 2010 (D Draper) - The property claim package extends east-west across the central section of the Lower Detour Lake Area and was named the South Detour property by Placer Dome and later the Aurora property by Conquest. It is located within the Abitibi Subprovince at the contact between the Abitibi greenstone terrain and the Migmatitic Opatika Subprovince. The property is situated on the southern flank of a synclinal fold structure that extends from the main body of the Abitibi belt in Quebec. The centre of the fold consists mostly of metasediments flanked by metavolcanics. The geological setting is in some ways similar to the Detour Lake property to the northwest in Sunday Lake Area. Thick sequences of massive to pillowed tholeiitic basalt flows contain interflow units consisting of mafic tuffs, greywackes and local chemical sediments. Gabbroic bodies and numerous feldspar porphyry and quartz-feldspar porphyry dykes intrude these sequences. Regional dynamothermal metamorphism, increasing to the west of the property, has resulted in recrystallization and deformation fabrics. Later thermal metamorphism, related to batholith intrusion on the southern edge of the claims, has locally overprinted the regional fabrics. According to the classification adopted by Winkler (1979), the rocks at South Detour would be classified as upper greenschist facies in the eastern portion of the property, to lower amphibolite facies to the west, with amphiboles being the dominant metamorphic mineral. Rocks proximal to the batholith intrusion on the southern edge of the property or the felsic intrusion to the northeast, are hornfelsed with epidote-garnet (almandine?) +I- albite being the diagnostic contact metamorphic mineral assemblage. (adapted from B. Pierna report, Oct. 1997 in T-3436 (2.18222), p.14)
| Rock Type | Rank | Composition | Texture | Relationship | Hornfels-Unsubdivided | 1 | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Flow | Host | |
| Gabbro | 3 | Gabbro | Adjacent | |
| Feldspar Porphyry | 4 | Feldspar | Dyke | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Pyrite | Economic | Gangue | ||||
| 3 | Pyrrhotite | Economic | Gangue | ||||
| 4 | Marcasite | Economic | Gangue | ||||
| 5 | Chalcopyrite | Economic | Gangue | ||||
| Epidote | Alteration | 1 | |||||
| Magnetite | Alteration | 2 |
Mar 25, 2010 (D Draper) - Rocks in hole 519-055 are strongly hornfelsed and gold concentrations throughout the hole occur mainly within hornfelsed mafic volcanics. Epidote-magnetite hornfels returned significant assays of 2.08 g/t Au from 47 to 48m; 1.44 g/t Au over 1 m at 119m; and 4.25 g/t Au which includes 1 speck of visible gold from 131 to 132m. Hole 519-056, collared 225m NW of 519-055 in highly deformed tuffs or intrusives, returned gold values of 0.80 g/t Au from 44.42 to 46.32m and 0.94 g/t Au over 1 m at 77m. Mafic flows occuring below the tuffs/intrusives? returned notable assays of 2.24 g/t Au from 106.93 to 108m and 1.79 g/t Au over 1m at 136m. (Précis of T-3436 (2.18114), pp. 23-24) [Ed. Note: the latter unit, from 92 to 154.4 m, is described as gabbro in the drill log.]
Map - Burntbush-Detour lakes, Cochrane District
Publication Number: M2453 Scale: 1:100,000 Date: 1982
Author: Johns G.W.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Burntbush-Detour lakes area, District of Cochrane
Publication Number: R199 Date: 1982
Author: Johns G.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological Compilation of the Burntbush-Detour Lakes Area, Abitibi Greenstone Belt
Publication Number: P3609 Scale: 1:100,000 Date: 2009
Author: Ayer J.A., Chartrand J.E., Duguet M., Rainsford D.R.B., Trowell N.F.
Publisher Name: Ontario Geological Survey
Location:
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