Ontario Geological Survey
Permanent Link to this Record:
MDI42D16SE00002
| Record Name(s) | Fallen Creek - 1967, Fallen Lake Float - 2002 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1980-Aug-18 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Zinc
Township or Area: Lorna Lake Area
Latitude: 48° 51' 48.79" Longitude: -86° 10' 11.05"
UTM Zone: 16 Easting: 560893 Northing: 5412620 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D16SE
Point Location Description: General
Location Method: Conversion from MDI
2002: Freewest Resources carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.24154 | 42D16NE2009 | 42D16NE2009 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Amphibolite | 1 |
|---|---|---|---|---|
| Ironstone-unsubdivided | 2 |
| 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 | Chalcopyrite | Economic | Ore | ||||
| 4 | Malachite | Economic | Ore |
Mar 16, 2018 (Therese Pettigrew) - Minor malachite and rusty gossan along a fault in hornblende hornfels and amphibolite (Shklanka, 1969). A small gossan zone is found in Fallen Creek about 805 m north of Fallen Lake. Fallen Creek lies in a deep NE-trending gully with a high cliff on the NW side. The cliff face is composed of dense, fine-grained hornblende hornfels and amphibolite and is broken in places by widely spaced joints. In the area of the gossan, a highly fractured buttress of rock, about 91-122 m wide, projects from the cliff. Two sets of closely spaced fractures cut the rock and tehse trend N40W, dipping 40NE and N70W, dipping 75S. At the top of the talus pile below the buttress, the bottom of a fault, which cuts back up into the cliff, can be seen. This fault strikes approximately N35E and dips 40SE. Rusty gossan and scattered spots of malachite gossan occur along this fault. Pyrite stringers, carbonate, and siliceous gouge material can be seen in the fault. The shatter zone of the buttress is terminated on the north side by a 0.3 m wide, gouge-filled fracture striking N70W and dipping 75S (Milne, 1967). No assays have been reported from Fallen Creek, but a float boulder located by Freewest at NAD38 UTM Zone 16, 560585 m E, 5411833 m N assayed 5380 ppm Zn and 366 ppm Cu. This sample was described as a very fine-grained, green to dark green, finely banded iron formation with 2-4% disseminated pyrrhotite, minor chalcopyrite, and some pyrite, taken from a boulder (AFRI 42D16NE2009).
Map - Manitouwadge-Wawa sheet, geological compilation series, Algoma, Cochrane, Sudbury and Thunder Bay districts
Publication Number: M2220 Scale: 1:253,440 Date: 1972
Author: Milne V.G., Giblin P.E., Bennett G., Thurston P.C., Wolfe W.J., Giguere J.F., Leahy E.J., Rupert R.J.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of Cirrus Lake-Bamoos Lake area, District of Thunder Bay
Publication Number: R043 Scale: Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
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