Ontario Geological Survey
Permanent Link to this Record:
MDI42E03NW00008
| Record Name(s) | Gravel River Specularite - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Apr-02 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Secondary Commodities: Sulphur/Pyrite
Township or Area: Dickison Lake Area
Latitude: 49° 9' 40.33" Longitude: -87° 27' 6.93"
UTM Zone: 16 Easting: 467051.998 Northing: 5445474.649 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E03NW
Point Location Description: Unknown
Location Method: Data Compilation
Access Description: The occurrence is located approximately 32 km north of Rossport, 400 m west of the Gravel River along the Dinkin Lake Fault. It is approximately 3 km northwest of Greenhedge Lake. Access is by aircraft to Greenhedge Lake or by helicopter to the Gravel River.
1928: The area was staked but no work recorded. 1931: Prospecting and staking; Canada Gold Ventures Syndicate. 1954: Geological investigation; M.W. Bartley for the C.P.R. 1970: Geological mapping; M. Carter (ODM). 1983-1987: Prospecting; N. Hibbart, J. Marcella, D. McCullough and others.
Province: Superior
Geological Age: Archean
Dec 07, 2005 (D McKay) - Bartley (1955) described the occurrence as follows: ...there is a zone about 100 feet wide containing stringers and veinlets of quartz and specularite. The specularite stringers are up to one-quarter inch in width. The veinlets are composed of either quartz or specularite or a mixture of both. The enclosing rock is a light, brownish grey quartzitic sediment which weathers to a light tan colour. It contains some dark, brown weathering carbonate and local disseminations or very small, rusty pyrite cubes. On weathering, the veinlets are more resistant to erosion, and project above the surrounding surfaces. Hinz and Landry (1994) as well as Bartley (1955) described quartz veins up to 300 feet wide in the Dickison Lake-Gravel River area.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Sandstone | 2 | Unspecified Quartzitic Sed | Host |
Dec 07, 2005 (D McKay) - According to Bartley (1955): The enclosing rock is a light, brownish grey quartzitic sediment which weathers to a light tan colour.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Specularite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Hydrothermal | 1 | Veins |
Dec 07, 2005 (D McKay) - Bartley (1955) described the occurrence as follows: ...there is a zone about 100 feet wide containing stringers and veinlets of quartz and specularite. The specularite stringers are up to one-quarter inch in width. The veinlets are composed of either quartz or specularite or a mixture of both. The enclosing rock is a light, brownish grey quartzitic sediment which weathers to a light tan colour. It contains some dark, brown weathering carbonate and local disseminations or very small, rusty pyrite cubes. No assay data are reported.
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Map - Dickison Lake, Thunder Bay District
Publication Number: M2293 Scale: 1:63,360 Date: 1974
Author: Carter M.W.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Book - DICKISON LAKE AREA, UNPUBLISHED RPT, C.N.R. DEVELOPMENT SECTION, 10P.
Publication Number: CPR RPT Date: 1955
Author: Bartley, M.W.
Publisher Name:
Location: Thunder Bay RGP
MonoMap - Geology of the Dickison Lake area, District of Thunder Bay
Publication Number: R123 Date: 1975
Author: Carter M.W.
Publisher Name: Ontario Division of Mines
Location:
Mono - Industrial Mineral Occurrences and Deposits in Northwest Ontario
Publication Number: OFR5889 Date: 1994
Author: Hinz P., Landry R.M.
Publisher Name: Ontario Geological Survey
Location:
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