Ontario Geological Survey
Permanent Link to this Record:
MDI42E10NE00007
| Record Name(s) | Birch Bay Occurrence - 1934 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Jan-23 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Croll
Latitude: 49° 39' 58.35" Longitude: -86° 41' 10.02"
UTM Zone: 16 Easting: 522650.485 Northing: 5501566.489 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E10NE
Point Location Description: Trenches.
Location Method: Conversion from MDI
Access Description: The claim block is located predominantly in the southeast corner of Croll Township, with portions of the claims in northeastern Coltham Township. The property can be reached by travelling Highway 11, 9.5 km east of the turn-off to Geraldton (highway 584), and southeast on Eldee Lake Road to Long Lake. From this point, the property is accessible by boat, approximately 8.5 km to the northeast on Long Lake to Birch Bay, and 1.5 km to the western end of the bay. Alternatively, the occurrence is accessible by boat from Longlac.
1929: Staked by Stanley B. Watson. 1930: Claims were transferred to Fred MacLeod. 1932: Various claims cancelled and restaked. 1933: Surface exploration was conducted on five claims previously held by MacLeod. (Gordon Duff and Duncan Finlayson were the new holders). 1934: All claims transferred to the newly incorporated Birch Bay Gold Mines Limited. A considerable amount of trenching and stripping was done and the main showing (TB10773) was drilled. The claims were surveyed. 1938: Remaining 11 claims were patented. 1939-45: Due to discouraging results, no further work was done on the property. 1946: The company was listed as inactive in the Canadian Mines Handbook (1946). 1958: Company assets sold and the charter was surrendered. 1986: Claims shown on the most recent claim map as being patented.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.4211 | 42E10NW0029 | 42E10NW0029 |
Province: Superior
Subprovince: Wabigoon
Terrane: Eastern Wabigoon
Belt: Beardmore-Geraldton
Geological Age: Archean
Dec 07, 2005 (G White) - The Big Long Lac Occurrence is located in the southeast portion of the main Beardmore-Geraldton Metasedimentary- Metavolcanic Belt. The property lies just south of the Croll Lake Stock, which may be related to much of the gold mineralization found in the Geraldton camp.
Dec 07, 2005 (B Nelson) - All the consolidated rocks are Precambrian. These are overlain by sands and gravels of glacial origin and in places by peat of poor quality. The pre-cambrian rocks include highly altered basic lavas, agglomerate, horneblende, chlorite, and biotite schists which are grouped as Keewatin; conglomerate, greywacke, arkose, iron formation, and quartzite, grouped as Timiskaming; granite, granodiorite, quartz diorite, diorite, and quartz and feldspar porphyries, probably later than the sediments; and diabase dykes, which are definitely younger than the other rocks of the area and are grouped in the Keweenawan. A mineralized shear zone strikes N75E and dips 80 degrees to the south. It occurs in a coarse, sheared, amygdaloidal agglomerate. Parallel to this zone, and several feel to the north, is a 0.9 m wide, highly sheared diorite porphyry dyke. The shear zone contains a number of small quartz veins up to 0.3 m in width. Mineralization in the 'honey-combed and strongly fractured quartz' consists of abundant coarse pyrite, tourmaline and visible gold. The showing has been exposed for 114.3 m, and the maximum width of quartz veins in the shear zone is 0.3 m. Drilling results were described as 'encouraging' (Fairbairne, 1938).
| Rock Type | Rank | Composition | Texture | Relationship | Porphyry-unsubdivided | 1 | Diorite | Sheared | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host | |
| Mafic Agglomerate | 3 | Amygdaloidal Agglomerate | Shear | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue |
Dec 07, 2005 (B Nelson) - The showing has been exposed for 114.3 m, and the maximum width of quartz veins in the shear zone is 0.3 m. Drilling results were described as 'encouraging' (Fairbairne, 1938).
Dec 07, 2005 (B Nelson) - Not known.
Map - Long Lake-Pagwachuan Lake area, District of Thunder Bay, Ontario
Publication Number: ARM46B Scale: 1:63,360 Date: 1997
Author: Fairbairn H.W., Macdonald R.D.
Publisher Name: Ontario Dept. of Mines
Location:
File - Northern Miner history file
Publication Number: NM Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts
Publication Number: M2102 Date: 1997
Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of the northern Long Lake area
Publication Number: ARV46-03.001 Date: 1997
Author: Fairbairn H.W.
Publisher Name: Ontario Dept. of Mines
Location:
Folio - McBean Lake area, District of Thunder Bay
Publication Number: GDIF047 Date: 1997
Author: Thunder Bay RGO
Publisher Name: Ontario Geological Survey
Location:
Mono - Gold occurrences, prospects, and deposits of the Beardmore-Geraldton area, districts of Thunder Bay and Cochrane
Publication Number: OFR5630 Date: 1986
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
Location:
File - Resident Geologist mineral deposit files
Publication Number: MDF Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office