Ontario Geological Survey
Permanent Link to this Record:
MDI41N15NE00024
| Record Name(s) | Hornblende Shear Zone - 1899 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-08 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: McMurray
Latitude: 47° 59' 21.15" Longitude: -84° 44' 45.72"
UTM Zone: 16 Easting: 668166.5 Northing: 5317559.02 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 41N15NE
Point Location Description: Shaft south of Hornblende Lake
Location Method: Conversion from MDI
Access Description: Drive south from highway 101 along the Surluga Road for approximately 500 m. The Hornblende shear is a poorly defined shear zone on a cliff face.
1899: Hornblende Mining Company Limited - 22 foot shaft, second shaft (32 feet) sunk location unknown 1930's: Surluga Gold Mines - trenching, diamond drilling. 1989-1990: Citadel Gold Mines - mapping.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| WP McMurray-20 | 42C02SE0220 | 42C02SE0220 |
| WPMCMURRAY 56 | 41N15NE9044 | 41N15NE9044 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Tectonic Assemblage: Wawa
Geological Age: Neoarchean Geochronological Age: 2750 MA Geochron. Age Ref.: OFR 5888
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (A Wilson) - The Hornblend shear zone is considered to be a splay structure below and west of the main Jubilee Shear Zone. It has been mined both at the mineral occurrence and on the seventh level of the Surluga Gold Mine.
| Rock Type | Rank | Composition | Texture | Relationship | Diorite | 1 | Diorite | Sheared | Adjacent |
|---|---|---|---|---|
| Intermediate Crystal Tuff | 2 | Andesite To Dacite | Crystal Tuff | Adjacent |
| Schist-Unsubdivided | 3 | Host |
Dec 07, 2005 (A Wilson) - The shear is poorly defined on a steep cliff face on the south side of Hornblende Lake. Wall rocks include the diorite of the Jubilee Lake Stock and the crystal tuffs of the Jubilee Tuff. The diorite in the vicinity of the vein has been sheared and shows replacement by biotite and tourmaline. The occurrence consists of a broad zone of strong foliation, sharing and mylonitization which can be followed northeasterwards across Mackey Point.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 1 | Tourmaline | Economic | Gangue | ||||
| 2 | Pyrite | Economic | Gangue | ||||
| 3 | Pyrrhotite | Economic | Gangue | ||||
| Silica | Alteration | Silicification | 1 | Medium | Massive |
Dec 07, 2005 (A Wilson) - Some visible gold has been observed in the quartz vein. The best assay attributable to this occurrence is 0.120 oz/t Au.
Dec 07, 2005 (A Wilson) - Silicification is found in both the matrix of the hostr ock as well as in the form of abundant stringers and veinlets.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 2000 | 15 | 120 | 80 |
Book - McMurray Township - unpublished GDIF
Publication Number: GDIF Date: 1985
Author: Resident Geologist Staff
Publisher Name:
Location: Timmins RGP
Map - Geological series, McMurray Township and parts of surrounding townships, formerly Township 29, Range 23, District of Algoma
Publication Number: P0828 Scale: 1:15,840 Date: 1973
Author: Rupert R.J.
Publisher Name: Ontario Division of Mines
Location:
Map - Geological series, Precambrian geology of McMurray Township, Wawa area, Algoma District
Publication Number: P2441 Scale: 1:15,840 Date: 1982
Author: Sage R.P., Sawitzky E., Turner J., Leeselleur P., Sagle E.
Publisher Name: Ontario Geological Survey
Location:
Part - Michipicoten gold area, District of Algoma
Publication Number: ARV36-02.001 Page: 42-43 Date: 1998
Author: Gledhill T.L.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Michipicoten area, District of Algoma, Ontario
Publication Number: ARM36A Scale: 1:47,520 Date: 1998
Author: Gledhill T.L.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of McMurray Township and parts of surrounding townships, District of Algoma
Publication Number: OFR5283 Page: 125-126 Date: 1979
Author: Rupert R.J.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Michipicoten Greenstone Belt, Central Portion
Publication Number: P3303 Scale: 1:50,000 Date: 1994
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Mono - Wawa mineral deposits data base
Publication Number: OFR5775 Page: 268-269 Date: 1991
Author: Frey E.D., Stewart R.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of Chabanel, Esquega, Lastheels and McMurray Townships, District of Algoma
Publication Number: OFR5586 Page: 430 Date: 1993
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Part - Michipicoton Mining Division
Publication Number: ARV09.005 Page: 114 Date: 1998
Author: Boyd D.G.
Publisher Name: Ontario Bureau of Mines
Location:
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