Ontario Geological Survey
Permanent Link to this Record:
MDI31L14SW00012
| Record Name(s) | Tyrrell Prospect - 1960, Opimika Creek - 1959, Terrell Iron City Property - 1966 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1980-May-14 |
| Date Last Modified | 2022-Jul-19 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Parkman
Latitude: 46° 50' 40.11" Longitude: -79° 17' 17.69"
UTM Zone: 17 Easting: 630513 Northing: 5189304 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 31L14SW
Point Location Description: approximate
Location Method: Based on Assessment
Access Description: Access is via automobile from Thorne to Opimika Camp on Troutbait Lake, whence a trail leads to the property. Alternatively an automobile may be driven to McLaren Point, from which a bush road leads to a point on Opimika Creek approximately 1/2 mile east of the property.
1960: Ventures Claims Ltd. - ground geophysics, DD-6-505 m, mapping. 1966-1973: Iron City Mines Ltd. - mapping, DD-12-459 m, ground geophysics
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63A.380 | 31L13SE0001 | 31L13SE0001 |
| Parkman SP-003 / 63.1072 | 31L13SE0002 | 31L13SE0002 |
| 10 | 31L13SE0003 | 31L13SE0003 |
| 2.1019 | 31L14SW0004 | 31L14SW0004 |
Province: Grenville
Subprovince: Central Gneiss Belt
Terrane: Tomiko
Geological Age: Mesoproterozoic Geochronological Age: 1250 MA Geochron. Age Ref.: OFR5554
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Contains |
|---|---|---|---|---|
| Magnetite Ironstone | 2 | Chert-Magnetite | Is |
Aug 10, 2012 (A Wilson) - Two north-northeast trending zones of magnetite-quartz and amphibole-quartz iron formation form the prospect. The iron formations are interbedded with biotite, muscovite and garnet schists, granitic gneisses and marbles. The Opimika Creek zone is hook shaped with a tapering and longer western limb. It is exposed over a horizontal length of approximately 7200 feet and averages 400 feet in width. The Bishop Zone is similar in shape but smaller. It has a strike length of approximately 2500 ft and is composed of two parallel bands separated by 200 feet of barren schist. The metasediments strike approximately N 35° E and dip to the west at angles of 20° to 75° - The average angle of dip is approximately 40°. The iron formation is very fine-grained, and consists of alternating bands of chert, magnetite, and green amphibole. Some magnetite is disseminated throughout the chert and amphibole bands. The weathered surfaces are black if chert bands are absent, or exhibit alternating bands of black and white. Fresh surfaces exhibit alternating white, black, and green bands.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Magnetite | Economic | Ore |
Aug 10, 2012 (A Wilson) - An east-west section across the north part of the Opimika Creek zone is estimated to contain approximately 70% iron formation with the content of soluble iron in iron formation sections mainly in the 10-20% range. No analytical results are reported for the Bishop Zone.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 762 | 122 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 2194 | 122 |
MonoMap - Geology and Mineral Potential of the Eastern Tomiko Terrane, Grenville Province
Publication Number: OFR5554 Page: 66 Date: 2006
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Jocko River Area
Publication Number: P2846 Scale: 1:50,000 Date: 2006
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Tomiko area (east half), District of Nipissing
Publication Number: P0679 Scale: 1:63,360 Date: 1997
Author: Lumbers S.B.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 272-273 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
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