Ontario Geological Survey
Permanent Link to this Record:
MDI42E11NE00011
| Record Name(s) | Portage Longlac Prospect - 9999, Portage Long Lac - 1991, Longacre Longlac - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-11 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Errington
Latitude: 49° 42' 50.17" Longitude: -87° 2' 7.28"
UTM Zone: 16 Easting: 497451.196 Northing: 5506826.124 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E11NE
Point Location Description: Diamond drill holes
Location Method: Conversion from MDI
Access Description: The property is located in Errington Township, approximately 4.8 km west of Geraldton. The property is accessible by Trans Canada Highway 11, 7.5 km west of the turnoff to Geraldton (Highway 584). The claim block is about 2.5 km north of the road. Alternatively, the property may be reached by canoe from Magnet Lake or Kenogamisis Lake, via Magnet Creek.
1931: Tony Oklend staked 2 claims. 1932: Nick Kochman staked three claims and performed surface work on all three. 1934: Further surface work was done on the above claims by the respective claim holders. Numerous claims were staked by other individuals. 1935: The majority of claims were transferred to Longacre Gold Mines Limited. 1936: J. Ridley staked three claims. J.S. Stevenson transferred one claim to Longacre Longlac Gold Mines Limited. Longacre Longlac transferred all its claims except those originally staked by Tony Oklend to Portage Longlac Mines Limited. The rest of the claims were presumably acquired by Portage Longlac under option. Portage Longlac began a drilling program after mapping the properties. 1937: Ridley's claims were transferred to W.A. Hooten, who optioned the claims to Portage Longlac Gold Mines Limited. A drilling program was completed by Portage Longlac Mines Limited. The two year total was 34 holes for an aggregate 6,277.4 m. 1938: J. Ridley's claims were surveyed. Three claims were transferred to Portage Longlac Mines Limited. 1949: All unpatented claims were transferred to Portage Longlac Mines Limited, and then surveyed. 1950: The unpatented claims were patented. In all, a block of 30 claims was held by Portage Longlac Mines Limited. 1985: Patented ground owned by T.L. Gledhill.
Province: Superior
Geological Age: Archean
Dec 07, 2005 (B Nelson) - Except for a few outcrops of andesite and diorite in the upper middle portion of the property, all the claims are covered to a depth of 100 feet by muskeg accumulations or deposits of sand and gravel. The upper-middle portion of the property is underlain by Keewatin lavas, principally altered andesites or basalts, which separate northern belt of Timiskaming sediments from the southern belt. The nature of the rocks composing the north sedimentary belt is not known. South of the volcanic horizon, where most of the development work has been concentrated, the rocks consist of arkose, greywacke, and iron formation. Intrusive into both the volcanic and sedimentary formations are dykes and sill-like masses of hornblende, diorite, plagioclase diorite porphyry, and albite porphyry. The sedimentary strata strike across the property in a general west-northwest direction, and dip steeply to the south. The apparent repetition of the arkose horizon suggests minor folding along east-west axes, and although the exact nature of the folds is difficult to ascertain from drill cores, it seems likely that they should be compatible with the many minore west-plunging folds in the area. A broad shear zone striking slightly north of west has been located in the sediments near the middle of the property, north of Magnet Creek. Twenty-five holes were drilled up to 1937. Gold values were obtained for a length of 3600 feet over an area up to 500 feet in width. The values are commonly associated with sulphides, in sheared and brecciated greywacke and arkose. Quartz stringers are present but quartz is not prominent.
| Rock Type | Rank | Composition | Texture | Relationship | Diorite | 1 | Diorite | Near |
|---|---|---|---|---|
| Intermediate lava flow-unsubdivided | 2 | Andesite | Near | |
| Mafic lava flow-unsubdivided | 3 | Basalt | Near | |
| Sandstone | 4 | Arkose | Sheared, Brecciated | Host |
| Sandstone | 5 | Greywacke | Sheared, Brecciated | Host |
| Ironstone-unsubdivided | 6 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Arsenopyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Sphalerite | Economic | Ore | ||||
| 5 | Pyrrhotite | Economic | Ore | ||||
| Quartz | Alteration | Silicification | 1 |
Dec 07, 2005 (B Nelson) - Gold values are commonly associated with py, cp, asp, po and sp mineralization in sheared and brecciated greywacke and arkose. A.F. Matheson (1937) reported the following assay results: 0.03 oz/ton Au over 1 foot; $10.18/ton Au over 6.7 feet; $11.37/ton Au over 5 feet. Sections assaying $39.90 and $33.25 acrpss 1 foot were also encountered. One of the veins lying within the major shear was cut by drill holes 25, 30, 31 and possibly 21 with the following results: Hole 25: $10.18/ton over 6.7 feet. Hole 30: $11.37/ton over 5.0 feet. Hole 31: $ 4.20/ton over 5.0 feet. Hole 21: $ 1.75/ton over 2.5 feet.
Map - Little Long Lac gold area, District of Thunder Bay, Ontario
Publication Number: ARM44D Scale: 1:31,680 Date: 1997
Author: Bruce E.L.
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:
Map - Township of Errington, District of Thunder Bay, Ontario
Publication Number: M1951-07 Scale: 1:12,000 Date: 1997
Author: Horwood H.C., Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of Errington Township, Little Long Lac area
Publication Number: ARV60-06 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
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:
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Thunder Bay data series, Lindsley Township area, Thunder Bay District
Publication Number: P2519 Scale: 1:15,840 Date: 1982
Author: Love W.D.
Publisher Name: Ontario Geological Survey
Location:
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