Ontario Geological Survey
Permanent Link to this Record:
MDI42E03NW00007
| Record Name(s) | Dinkin Lake Pyrite Occurrence - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Apr-01 |
| Date Last Modified | 2022-May-09 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Dickison Lake Area
Latitude: 49° 10' 39.98" Longitude: -87° 28' 13.66"
UTM Zone: 16 Easting: 465712.015 Northing: 5447324.664 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42E03NW
Point Location Description: Outcrop on bluff overlooking west shore of Dinkin Lake
Location Method: Data Compilation
Access Description: The occurrence is located on the western shore of Dinkin Lake northwest of the Greenhedge-Dickison Lake area, approximately 60 km northeast of Terrace Bay (claim map G-31). Access is gained by float plane or helicopter to Dinkin Lake or by logging road from the Camp 81 road system east of Nipigon.
1928: Area 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) - Carter (1975) described the occurrence as follows: The pyrite deposit is in the bluff on the western shore of Dinkin lake. The pyrite is in a fine grained brecciated diabase that was intruded into the Croon Lake-Dinkin Lake Fault. The diabase contains about 4 percent pyrite across a width of 3 feet and along a strike-length of 3/4 mile. Pyrite occurs as disseminated grains in the diabase and in the quartz that cements the diabase fragments. Schnieders et al. (1996) provide the following comments regarding the area: N. Hibbart prospected the Dinkin Lake area during a period between 1983 and 1987. Hibbart reportedly had a camp on Dinkin Lake and prospected the Gravel River/Kamuck River Fault area and Dickison Lake area as well as the Dinkin Lake area. During this period numerous samples of quartz veins, altered granite and metasedimentary rock were collected by N. Hibbart. Notes and maps submitted with samples in 1984 by N. Hibbart indicated quartz veins over 100 feet wide.
| Rock Type | Rank | Composition | Texture | Relationship | Diabase | 1 | Diabase Dike | Fine-Grained, Locally Brecciated | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| Quartz | Alteration | Hydrothermal | 1 | Veins |
Dec 07, 2005 (D McKay) - Carter (1975) states: The pyrite is in a fine grained brecciated diabase that was intruded into the Croon Lake-Dinkin Lake Fault. The diabase contains about 4 percent pyrite across a width of 3 feet and along a strike-length of 3/4 mile. Pyrite occurs as disseminated grains in the diabase and in the quartz that cements the diabase fragments. During a period between 1983 and 1987 over 30 samples were submitted by N. Hibbart from the Gravel River - Dickison Lake area and assayed by the OGS Resident Geologist's program. Two samples submitted in 1984 (Sample 84-BNH-4 and 84-BNH-6) assayed 0.03 ounce per ton Au and 0.06 ounce per ton Au and are reported to have come from an area 650 to 850 feet south off the Gravel River along a small creek. This area is 2 to 3 km east of the Greenbush area and 1 km north of the Greenhedge Lake Fault occurrence. This gold occurrence has thus been named the Hibbart occurrence, and may correspond to the Greenbush Lake occurrence.
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:
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:
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:
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Book - DICKISON LAKE AREA, UNPUBLISHED RPT, C.N.R. DEVELOPMENT SECTION, 10P.
Publication Number: CNR RPT Date: 1955
Author: Bartley, M.W.
Publisher Name:
Location: Thunder Bay RGP
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