Ontario Geological Survey
Permanent Link to this Record:
MDI000000001041
| Record Name(s) | Cunningham - 2007, Lorne's Outcrop - 2006 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2011-Mar-04 |
| Date Last Modified | 2022-Dec-05 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Secondary Commodities: Gold
Township or Area: Potts
Latitude: 48° 51' 35.93" Longitude: -93° 51' 48.35"
UTM Zone: 15 Easting: 436670 Northing: 5412250 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52C13SW
Point Location Description: Taken from UTM coordinated presented in AFRO file 2.37092
Location Method: Data Compilation
Access Description: Exposures are located east of Finland, Finland is located along Hwy 71. The exposures are located on private property and are situated 1 km west of Hwy 615. The exposures are located approximately 3 km southwest of Off Lake.
2006: Rainy River Resources conducted a VTEM survey. 2007: Rainy River Resources carried out mapping, prospecting, stripping, and sampling. 2008: Rainy River drilled 5 RC holes. 2009: Rainy River drilled 2 DDH totalling 351.8 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.37092 | 20000002652 | 20000002652 |
| 2.41218 | 20000004142 | 20000004142 |
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
Mar 04, 2011 (C Ravnaas) - The early quartz veins predate several generations of later quartz veins, both ductile and brittle faults, and two periods of granitoid intrusions. The early age of the veins and the sharp contact on the southern outcrop between foliated, quartz-phyric, felsic rocks containing the quartz stockwork and a more massive, quartz-phyric, felsic unit that lacks quartz veins suggests that the vein system may be related to emplacement of the Off Lake felsic dike complex . The only similar quartz stockwork observed to date in the area is associated with the Off Lake fault. The vein system on the Cunningham option has a distinctly different trend to that of both the Off Lake fault, the inferred extension of which is about 800 m to the east, and the Potts fault, which is about 1 km to the south. However, the quartz stockwork on the Cunningham option may be related to an undiscovered early fault in the southern part of the Off Lake felsic dike complex. (Rainy River Resources, Assessment File AFRO 2.37092, January 13, 2008).
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Granitoid-Unsubdivided | 2 | Dykes | Contains |
Mar 04, 2011 (C Ravnaas) - Two outcrops in the south part of the property contain extensive quartz vein systems. The host rock in both outcrops is a suite of white to pale grey, to pale brown, to rusty weathering, quartz-phyric felsic dikes that contain 1 to 3%, 1- to 4-mm, quartz phenocrysts. Groundmass of the dikes has been recrystallized and is now fine grained. Dikes vary from foliated to massive. The two outcrops may be part of a single vein system. This is a relatively small, subcircular outcrop, the cleaned part of which is 35 m (east-west) by 25 m (north-south). On this outcrop, there is evidence of at least three intrusive events, three vein injection events, several periods of deformation and sulphide mineralization. The southern outcrop, which is considerably larger than the northern outcrop, the quartz vein system occurs along the relatively poorly exposed northwest edge; the vein system has been stripped in a number of places (Rainy River Resources, Assessment File AFRO 2.37092, January 13, 2008) Pale-grey, quartz veins that are generally <5 cm wide, but locally are as much as 50 cm wide, occur in foliated, rusty-weathering, quartz-phyric, felsic dikes. Most veins preferentially trend between 030° and 100°, but the veins are interconnected to form a stockwork within an in situ breccia. The vein system is at least 30 m wide, and it was traced about 100 m to the northeast, along a trend of 045°, before disappearing in an area of poor exposure about half way across the outcrop. To the northeast, the vein system appears to decrease in width, and the system here is less obvious because there is less rusty weathering(Rainy River Resources, Assessment File AFRO 2.37092, January 13, 2008)
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Sphalerite | Economic | Ore | ||||
| 4 | Chalcopyrite | Economic | Ore | ||||
| 5 | Galena | Economic | Ore |
Mar 04, 2011 (C Ravnaas) - No assay results were presented in any geological reports submitted for assessment credit. The Felsic Intrusive exposure which has quartz-phyric, felsic dikes that contain as much as 10% pyrite and minor chalcopyrite. The sulphide minerals occur as disseminated grains and aggregates, which are as much as 1 cm in diameter and in narrow, sericitic, shear zones. Anomalous gold values occur in a sample collected in 2006). Sulphide mineralization also occurs in early quartz veins (Rainy River Resources, Assessment File AFRO 2.37092, January 13, 2008)
Nov 25, 2019 (Therese Pettigrew) - DDH OL09-14 returned up to 6170 ppm Cu and 0.091 ppm Au. DDH OL09-15 returned up to 4840 ppm Cu and 0.054 ppm Au (Assessment report 20000004142).
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