Ontario Geological Survey
Permanent Link to this Record:
MDI41P12SW00133
| Record Name(s) | Emerald Isle - 1984, Siragusa #49 - 1993, Burns - 1988 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2000-Mar-16 |
| Date Last Modified | 2022-Jul-15 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Chester
Latitude: 47° 32' 55.19" Longitude: -81° 56' 33.98"
UTM Zone: 17 Easting: 429062.57 Northing: 5266568.69 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 41P12SW
Point Location Description: Stripped area
Location Method: Field Visit with GPS
Access Description: Easy access is possible as an old secondary logging road, which connects the Chester Shannon mine access road in the north to the Chester logging road in the south, passes over the stripped area.
1930's: trenching. 1965: Shannon Minerals - HLEM survey, mapping, trenching. 1965: Chester Minerals - HLEM survey, mapping. 1979: Canadian Crest Gold Mines Ltd. - airborne radiometric, magnetic survey. 1984: Gogama Resources - mapping, IP survey, diamond drilling. 1985-88: Emerald Isle Resources - mapping, VLF-Em survey, stripping, trenching, 3 ddh. 1987: Blanchard - diamond drilling. 1988-89: Isaac Burns Metals Inc. - stripping, trenching, 3 ddh. 2007: Augen Gold Corp. – AEM, AMag, ARAD. 2009: Trelawney Mining and Exploration Inc. - IP, Mag, RES. 2010: Trelawney Mining and Exploration Inc. – AEM, AMag.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-2021 / 2.482 | 41P12SW0121 | 41P12SW0121 |
| T-2023 / 63A.470 | 41P12SW8459 | 41P12SW8459 |
| T-2034 / 63.1866 | 41P12SW0117 | 41P12SW0117 |
| T-2945 / 2.7838 | 41P12SW0065 | 41P12SW0065 |
| T-2945 / | 41P12SW0072 | 41P12SW0072 |
| T-2994 / W8606-00057 | 41P12SW5135 | 41P12SW5135 |
| T-2994 / | 41P12SW0058 | 41P12SW0058 |
| T-2994 / 2.8663 | 41P12SW0062 | 41P12SW0062 |
| T-2994 / 2.8372 | 41P12SW0064 | 41P12SW0064 |
| T-3024 / 63.5312 | 41P12SW0031 | 41P12SW0031 |
| T-3024 / | 41P12SW0399 | 41P12SW0399 |
| T-5671 / 2.37373 | 20000002805 | 20000002805 |
| T-6060 / 2.43510 | 20000004318 | 20000004318 |
| T-6382 / 2.50730 | 20000007118 | 20000007118 |
| T-1751 / 2.3181 | 41P12SW0083 | 41P12SW0083 |
| T-2034 / 63A.470 | 41P12SW8459 | 41P12SW8459 |
| T-2994 / W8606-00055 | 41P12SW5137 | 41P12SW5137 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Swayze
Geological Age: Neoarchean Geochronological Age: 2740 MA Geochron. Age Ref.: GSC OF 3384G
Dec 07, 2005 (A Wilson) - This showing is characterized by the single main shear zone that is present rather than the more typical network of shears. The shear zone is relatively continuous across the stripped outcrop and varies between 10 and 150 cm wide. Within the sulphide veins the quartz component is clearly ground and rounded by tectonic milling. Thes clasts have then been recemented by the sulphides.
Oct 16, 2013 (P Bousquet) - (A Wilson, BURNS Outcrop)The mineralization is associated with a broad shear zone that is composed of multiple phases, each representing different ages or pulses of tectonism. Individual shear zones have been measured with a strike of 250, but the general trend of the shearing exposed in the trenches is 280. This may suggest that the individual shears and mineralized zones form an en echelon structure.
| Rock Type | Rank | Composition | Texture | Relationship | Granodiorite | 1 | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Vein | Host |
| Vein | 3 | Quartz | Host |
Oct 16, 2013 (A Wilson) - The host rock is a massive, fine to medium grained, quartz rick granodiorte which is typical of the Chester Granitoid Complex. This unit is cut by a shear zone that has chlorite alteration in the footwall of the shear zone and disseminated pyrite in the hanging wall. A number of irregular quartz veins with minor tourmaline cross cut the main mineralized trend.
Oct 16, 2013 (P Bousquet) - (A Wilson, BURNS outcrop)The host rock is a massive, fine to medium grained, equigranular granodiorite with some minor hornblend e diorite to quartz diorite phases. Within the shearing, chlorite alteration occurs in minor amounts. Some carbonate and sericite alteration has been reported in drill core.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Telluride | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Hematite | Economic | Gangue | ||||
| 3 | Arsenopyrite | Economic | Gangue | ||||
| Chlorite | Alteration | Chloritic | 1 | Medium | Replacement | ||
| Pyrite | Alteration | Pyritic | 2 | Medium | Replacement | ||
| Malachite | Alteration | Supergene | 3 | Weak | Disseminated |
Dec 07, 2005 (A Wilson) - Within the main shear zone, there are some discontinuous quartz veins. Individual quartz veins are up to 20 cm thick and several metres long and contain parallel, semi-massive, trails of pyrite up to 2 cm thcik. These pyrite trails/veins also occur in the main shear zone where no quartz veining exists and as parallel veinlets in the hanging wall of the shear zone. Adjacent to these pyrite veins, disseminated pyrite extends some 10 cm into the granodiorite. The sulphide veins are composed of >90% pyrite together with minor amounts of quartz, hematite, chalcopyrite and other sulphides. Chalcopyrite typically occurs along secondary discordant fractures within the sulphide veins. Grab samples collected by Emerald Isle Resources returned values of between 4 g/t au and 41g/t Au. Grab samples collected by the OGS in 1993 returned the following values: 1.23 g/t Au, 0.6 g/t Ag; 34.15 g/t Au, 6.8 g/t Ag.
Oct 16, 2013 (P Bousquet) - (A Wilson, BURNS outcrop) Within the shear zone, mineralization is discontinuous along strike. Where mineralization occur, it is very similar to that at the Emerald Isle occurrence and consists of narrow massive sulphide veinlets and quartz veins. Associated with these veinlets are disseminations of pyrite which extend into the adjacent granodiorite wallrock a short distance. Burns obtained assays ranging between trace and 58 g/t Au and averaged 8.8 g/t Au. Grab samples collected by the OGS in 1993 returned values of 2.1 g/t Au, 1.5 g/t Ag; 0.127 g/t Au, 0.3 g/t Ag.
| Rank | Classification |
|---|---|
| 2 | Mesothermal |
| Rank | Characteristic |
|---|---|
| 2 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular | 200 | 250 | 60 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Tabular | 80 | 260 | 80 |
Map - Precambrian Geology, Parts of Chester, Neville, Potier and Yeo Townships
Publication Number: OFM0214 Scale: 1:15,840 Date: 1993
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology, Geochemistry and Mineralization of the Southern Margin of the Swayze Belt
Publication Number: OFR5844 Page: 86-87 Date: 1993
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Precambrian geology of Chester and Yeo townships, and parts of Neville and Potier townships, Jerome area, Sudbury District
Publication Number: P2449 Scale: 1:15,840 Date: 1981
Author: Siragusa G.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)
Publication Number: OFR5912 Page: 460-461 Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
Location:
Map - Geology, Swayze greenstone belt, Gogama, Ontario
Publication Number: OF3384G Scale: 1:50,000 Date: 1999
Author: Heather, K B; Shore, G T
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/210455
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