Ontario Geological Survey
Permanent Link to this Record:
MDI42K01SW00004
| Record Name(s) | Nagagami River Alkalic Complex 2 - 1991, Algoma DH #8 - 1964 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Feb-25 |
| Date Last Modified | 2022-Oct-06 |
| Created By | |
| Revised By |
Primary Commodities: Niobium
Secondary Commodities: Nepheline Syenite
Township or Area: Pitopiko River Area
Latitude: 50° 5' 2.21" Longitude: -84° 24' 22.78"
UTM Zone: 16 Easting: 685545.86 Northing: 5551186.54 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42K01SW
Point Location Description: collar of Algoma drillhole #8 on Baseline G
Location Method: Based on Assessment
Access Description: The complex is located 65km NW of Hearst and about 6.5km SW of the junction of the Nagagami and Otasawain rivers, lying 32km north of the Canadian National rail line. Access to the area is by float-equipped aircraft and all-terrain vehicle; planes can land on Ping Lake to the east of the complex.
1961-64:Algoma Ore Properties Division: Aeromagnetic survey; ground dip-needle survey;company obtained an E.L.O. for area of anomaly; line-cutting; ground mag survey; DDH-7-984.3 m, assays, scintillometer testing of core; petrographic analyses.
Province: Superior
Subprovince: Quetico
Geological Age: Archean Geochron. Age Ref.: S043, p.2
Mar 21, 2014 (D Draper) - The complex is unexposed at surface. Aeromagnetic surveys indicate the complex consists of two ring-shaped subcomplexes, with the southern cutting the northern, suggesting the south (#2) complex is younger than the north, larger (#1) complex. The southern subcomplex is approximately 5 km in diameter and is overlain by 15 - 84m of overburden and Paleozoic sediments.
| Rock Type | Rank | Composition | Texture | Relationship | Syenite | 1 | Amphibole-Pyroxene Syenite | Host |
|---|
Mar 21, 2014 (D Draper) - The dominant rock type is an amphibole-pyroxene syenite which varies from fine to coarse grained and locally displays a trachytoidal texture. A very coarse-grained pegmatitic phase and a coarse-grained nepheline-bearing phase (silica-undersaturated, biotite-amphibole-nepheline syenite) appear restricted to the southern subcomplex.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Nepheline | Economic | Ore | ||||
| 1 | Biotite | Economic | Gangue | ||||
| 2 | Amphibole | Economic | Gangue | ||||
| 3 | Magnetite | Economic | Gangue | ||||
| 4 | Perthite | Economic | Gangue |
Mar 21, 2014 (D Draper) - Algoma drillhole #8 (Az. 90º dip 60º, to 577ft) returned an assay of 0.3% Nb205 from a grab sample of syenite taken at 230 feet. Best assay from drillhole #9 (collared 1600ft to west of #8, az. 270º, dip 60º to 449ft) was 0.06% Nb from sample taken from 425 - 435ft. Fluorite was noted at 306ft in #9. Nepheline mineralization occurs in hole #9 as red-brown, waxy hydronephelite (an alteration form of nepheline) comprising 5 - 10% of the rock. Fresh nepheline was not observed.
| Rank | Classification |
|---|---|
| 1 | Carbonatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
File - Resident Geologist files T-0338, T-0343, T-4267
Publication Number: Date:
Author:
Publisher Name:
Location: Timmins RGP office
Map - Pagwa River-Calstock sheet, districts of Cochrane and Algoma, geological compilation series
Publication Number: P0552 Scale: 1:126,720 Date: 1997
Author: Innes D.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Geology of carbonatite-alkalic rock complexes in Ontario: Nagagami River alkalic rock complex, District of Cochrane
Publication Number: S043 Date: 1988
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Map - Caramat-Pagwa River sheet, geological compilation series, Algoma, Cochrane and Thunder Bay districts
Publication Number: M2202 Scale: 1:253,440 Date: 1971
Author: Innes D.G., Ayres L.D.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Map - Aeromagnetic maps of carbonatite-alkalic complexes in Ontario
Publication Number: P0452-REV Scale: 1:4,224,000 Date: 1997
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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 Timmins Resident Geologist District Office