Ontario Geological Survey
Permanent Link to this Record:
MDI42E10NE00010
| Record Name(s) | Big Long Lac Occurrence - 1933 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-23 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Coltham
Latitude: 49° 39' 19.62" Longitude: -86° 41' 59.14"
UTM Zone: 16 Easting: 521670.633 Northing: 5500366.407 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E10NE
Point Location Description: Diamond-drill holes and surface quartz veins .
Location Method: Conversion from MDI
Access Description: The property is located in northeastern Coltham Township, west of West Side Bay, Long Lake. The property can be reached by travelling Highway 11, 9.5 km east of the turn-off to Geraldton (Hwy 584), and south and east on the Eldee Lake Road to Long Lake. From this point, the property is accessible by boat, approximately 6 km to the northeast on Long Lake. Alternatively, the occurrence is accessible by boat from Longlac.
1931: Claim blocks staked by 4 independent individuals. 1932: Surface exploration conducted on the claims. Three more claims staked. 1933: Big Long Lac Mining Co Ltd incorporated. Claims transferred to H. Cockburn and subsequently to the company. Trenching, stripping and pitting, and sampling done. 1934: Surface exploration continued. 14 diamond-drill holes sunk (640.1 m). Discouraging results led to suspension of operations on this property. A block of nine claims on Suicide River, south and east of Long Lac, were optioned. Work was concentrated on these claims. 1941: Claims surveyed. 1947: Claims were patented and the company was listed as inactive in the Canadian Mines Handbook. 1949: Big Long Lac Gold Mining Co Ltd was noted as holding the 16 claim block in Coltham Township. 1986: Claims still shown as patented on the most recent claim map.
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. (Note: See the Mineral category for a brief description of the property mineralogy).
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.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Sandstone | 2 | Greywacke | Near | |
| Granite | 3 | Host | ||
| Ironstone-unsubdivided | 4 | Near | ||
| Mafic lava flow-unsubdivided | 5 | Near | ||
| Schist-Unsubdivided | 6 | Chlorite, Biotite | Near | |
| Conglomerate | 7 | Near | ||
| Diabase | 8 | Diabase | Near | |
| Diorite | 9 | Diorite | Near | |
| Quartz-Feldspar Porphyry | 10 | Quartz & Feldspar | Near |
| 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 | ||||
| Quartz | Alteration | Silicification | 1 |
Dec 07, 2005 (B Nelson) - Eight veins have been exposed in shear zones. Mineralization noted includes pyrite and free gold. The veins' widths range from 2.5 cm to greater than 3.7 m. Gold values range up to 0.81 oz/ton Au. One zone has been exposed for a length of 121.92 m and averages 0.6 m in width. Gold values range from 0.35 oz/ton Au to 2.14 oz/ton Au, with free gold noted.
Dec 07, 2005 (B Nelson) - Not known.
File - Northern Miner historical file
Publication Number: Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
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:
Map - Compilation series, Geraldton sheet, Thunder Bay and Cochrane districts
Publication Number: P0241 Scale: 1:126,720 Date: 1984
Author: Stott G.M., McConnell C.D., Mason J.K.
Publisher Name: Ontario Geological Survey
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:
Map - Mineral deposits series, Ontario mineral potential, Longlac sheet, districts of Thunder Bay and Cochrane
Publication Number: P1527 Scale: 1:250,000 Date: 1978
Author: Springer J.S.
Publisher Name: Ontario Geological Survey
Location:
Folio - McBean Lake area, District of Thunder Bay
Publication Number: GDIF047 Date: 1997
Author: Thunder Bay RGO
Publisher Name: Ontario Geological Survey
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:
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:
Book - RES. GEOL. MIN. DEP. FILE T.BAY
Publication Number: MDF Date:
Author:
Publisher Name:
Location: Thunder Bay RGP Assessment Files
Book - Canadian Mines Handbook 1947
Publication Number: CMH 1947 Date: 1947
Author:
Publisher Name:
Location: Thunder Bay RGP Library
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