Ontario Geological Survey
Permanent Link to this Record:
MDI41O16NW00034
| Record Name(s) | Dome West Zone - 1983 |
|---|---|
| Related Record Type | Simple |
| Record Status | Occurrence |
| Date Created | 1999-Nov-10 |
| Date Last Modified | 2022-Jan-05 |
| Created By | A Wilson |
| Revised By | A Wilson |
Primary Commodities: Gold
Township or Area: Newton
Latitude: 47° 52' 47.24" Longitude: -82° 23' 23.59"
UTM Zone: 17 Easting: 396081.102 Northing: 5303874.518 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 41O16NW
Point Location Description: Scaled off a company grid map
Location Method: Data Compilation
Access Description: Access to the general area of the occurrence is easy via theDore main haul road and the Orofino Mine/Rundle Mine access road. Severl kilometeres south of the Swayze River, a good drill road branches off of the Rundle road and goes south before turning west and running to Newton Creek. At Newton Creek the road becomes a trail extending south and east to the West Zone Extension. Eight hundred meters further east is the Dome West Zone proper.
1966: Hanna Mining Company - airborne mag and EM surveys, reconnaissance and detailed mapping. 1982-87: Dome Exploration - reconnaissance mapping and lithogeochemistry, stripping, diamond drilling (8 ddh), detail mapping, ground geophysics, prospecting, sampling.
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Swayze
Geological Age: Neoarchean Geochronological Age: 2700 MA Geochron. Age Ref.: GOO VOL 1
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (A Wilson) - The occurrence lies just to the west of the Newton High Strain Zone that traverses the southeastern part of Newton Township. Mineralization is located along carbonatized east-trending shears which have been intruded by porphyritc dikes.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz-Carbonate | Host |
|---|---|---|---|---|
| Mafic pillowed flow | 2 | Fe Tholeiitic, Calc Alkalic | Pillowed, Variolitic, Sheared | Host |
| Quartz-Feldspar Porphyry | 3 | Quartz Feldspar | Adjacent | |
| Mafic Tuff-Breccia | 4 | Breccia, Tuff | Adjacent |
Dec 07, 2005 (A Wilson) - The host rocks are a mixed sequence of calc-alkalic and iron tholeiitic basalts with massive, pillowed and variolitic textures. There are also pyroclastic, agglomeratic and brecciated metavolcanics and the whole sequence trends north-south. Small quartz-feldspar dikes have intruded the metavolcanics in an eas-west direction. Parallel to the easterly trend of the porphyry dikes, there is a zone of strong carbonate alteration. Quartz veins of two generations occur. One set is characterized by inclusions of brecciated wall rock and a high proportion of carbonate forms the largest vein. The other set of veins, occur in an orthogonal set, north trending and east trending, occupying fractures in the rock.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | Medium | Veins |
Dec 07, 2005 (A Wilson) - The carbonate alteration apparently is associated with one set of quartz veins which are part of the largest vein set at the occurrence. Pyrite concentrations up to 15% are found adjacent tot he contacts of this vein set. Pyrite also occurs in the pillowed flows between individual pillows (15-20%) and also associated with the volcanic breccia units. Gold values are known to be associated with th elarger quartz veins and with th eintensely carbonatized material adjacent to small quartz feldspar porphyry intrusions or the larger quartz veins. In the latter case, these zones of alteration only extend up to 3 m from the dikes or veins. The best assay to come from this zone is 186 g/t Au. Grab samples collected by the OGS in 1985 returned values of: 1.37 g/t Au, 3.3 g/t Au, 0.03 g/t Au, 0.25 g/t Au, 2.18 g/t Au and 0.13 g/t Au.
| Rank | Classification |
|---|---|
| 1 | Mesothermal |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 270 |
Map - Geology, Swayze greenstone belt, Rush Lake, Ontario
Publication Number: OF3384c Scale: 1:50,000 Date: 1999
Author: Heather, K B; Shore, G T
Publisher Name: Geological Survey of Canada
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 Scale: Date: 1995
Author: Fumerton S.L., Houle K.A.
Publisher Name: Ontario Geological Survey
Map - Geological Compilation of the Swayze Area, Abitibi Greenstone Belt
Publication Number: P3511 Scale: 1:100,000 Date: 2002
Author: Ayer J.A., Trowell N.F.
Publisher Name: Ontario Geological Survey
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