Ontario Geological Survey
Permanent Link to this Record:
MDI52J15NE00004
| Record Name(s) | Belcher-Doran - 1958, Doran Lake - 1956 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1982-Nov-25 |
| Date Last Modified | 2023-Mar-23 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Doran Lake Area
Latitude: 50° 57' 32.19" Longitude: -90° 38' 26.33"
UTM Zone: 15 Easting: 665691.225 Northing: 5647909.277 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52J15NE
Point Location Description: Fe triangle depicted on map 2442 (southwest bay of Doran Lake).
Location Method: Other Literature
Access Description: Access is by float plane from Pickle Lake.
The iron formations that outcrop on the islands in the southwest part of Doran Lake were discovered by prospectors working for Lun-Echo Gold Mines Limited in March 1956. Hanna Mining completed metallurgical tests on samples for this prospect in 1957 and on that basis rejected property acquisition. Belcher Mining Corporation and Lun-Echo Gold Mines Limited completed an exploration program on their Doran Lake Iron Prospect. Diamond drilling and magnetic (dip needle) surveys conducted from 1958 to 1960 outlined some 375 M tons grading 19.24% magnetic iron.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52J15NE0012 | 52J15NE9000 | 52J15NE9000 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Lake St. Joseph
Geological Age: Neoarchean
Dec 07, 2005 (Mark O'Brien) - The iron formations of eastern Lake St. Joseph are 'composed of interbanded quartz, siliceous magnetite, and clastic sedimentary rocks.' A.M. Goodwin (ODM 1965) further described the Doran Lake 'iron-silica layers' as 'generally thinner and more discontinuous than are those at Soules Bay'. These layers are less than 4 inches thick and they 'are commonly separated by 3 to 6 inches of biotite-quartz schist'.
Aug 28, 2007 (Mark Puumala) - The Belcher-Doran deposit is located within an east-west-trending band of metasedimentary rocks located south of the granitic Doran Lake stock and to the north of a band of granite gneiss and migmatite (Goodwin 1965). The metasedimentary sequence consists of impure quartzite, pebble conglomerate, arkose, greywacke, shale, tuff, and extensive bands of iron formation. The iron formation is described by Goodwin (1965) as a thinly-banded rock composed of alternating layers of magnetite, quartz and meatsedimentary schist. The main iron formation zone is approximately 4.5 km long, striking east-west (with a steep southerly dip) across the west half of Doran Lake. This iron formation ranges in thickness from 91 to 396 m, with an average width of 183 m. A second iron formation zone approximately 760 m long and 61 to 91 m wide occurs at the north shore of Doran Lake. This zone strikes approximately 110 with a steep southerly dip. Goodwin (1965) reports that a deposit (both iron formation zones combined) containing 381,675,000 tonnes (375,664,000 tons) of iron formation averaging 19.2% magnetic iron has been delineated at this location.
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Hematite | Economic | Ore | ||||
| 10 | Magnetite | Economic | Ore |
| Rank | Classification |
|---|---|
| 1 | Sedimentary |
| Rank | Characteristic |
|---|---|
| 1 | Layered |
| 2 | Stratabound |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Doran Lake A and B | 1957 | Unclassified | 340796648 | R042 p. 39 | Goodwin (1965) reports that a deposit (both iron formation zones combined) containing 340,796,648 tonnes (375,664,000 tons) of iron formation averaging 19.2% magnetic iron has been delineated at this location. | Iron 19.24 NA |
Map - Sioux Lookout-Armstrong, geological compilation series, Kenora and Thunder Bay districts
Publication Number: M2442 Scale: 1:253,440 Date: 1981
Author: Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Doran Lake sheet, Kenora and Thunder Bay districts
Publication Number: M2095 Scale: 1:31,680 Date: 1997
Author: Goodwin A.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Pashkokogan-Misehkow area, District of Thunder Bay, Ontario
Publication Number: ARM42E Scale: 1:253,440 Date: 1997
Author: Dyer W.S.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Pashkokogan Lake-eastern Lake St. Joseph area, districts of Thunder Bay and Kenora
Publication Number: R042 Page: 50-54 Date: 1997
Author: Goodwin A.M.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of the Pashkokogan-Misehkow area
Publication Number: ARV42-06.001 Date: 1998
Author: Dyer W.S.
Publisher Name: Ontario Dept. of Mines
Location:
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