Ontario Geological Survey
Permanent Link to this Record:
MDI52L02NE00004
| Record Name(s) | Snook Lake Granite - 1991, Snook Lake Deposit - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1991-Feb-28 |
| Date Last Modified | 2022-Jun-09 |
| Created By | |
| Revised By |
Primary Commodities: Granite
Township or Area: Snook Lake Area
Latitude: 50° 13' 45.06" Longitude: -94° 42' .85"
UTM Zone: 15 Easting: 378732.424 Northing: 5565495.84 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52L02NE
Point Location Description: Outcrop
Location Method: Conversion from MDI
Access Description: GENERAL LOCATION: The site is located approximately 50 km northwest of Kenora and 23 km north of Minaki, north of Tourist Lake in the Snook Lake area. ACCESS: The property can be accessed from Kenora by highway and a series of logging roads. Take Highway 658 north from Kenora to the English River Road, travel to the Sand Lake Road and take this road to the Snook Lake road. Total road mileage from Kenora to the site is 88 km.
Prior to 1987 no exploration was conducted for dimension stone. 1987: G.R. Zebruck of Kenora staked three unpatented claims over a high potential dimension stone site. 1988 G.R. Zebruck conducted radiometric and geological surveys. Kenora Gold Occurrences Inc. signed an option agreement with G.R. Zebruck to work the property. 1989: Kenora Gold Occurrences Inc. conducted sample testing to see if the stone met ASTM standards. 1991: The option lapsed and the property was returned to G.R. Zebruck. 1998: Nelson Granite has been removing stone as demanded. Production volume is documented yearly in Kenora ROAs.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52L02NE F-1 | 52L02NE0001 | 52L02NE0001 |
Province: Superior
Subprovince: Winnipeg River
Terrane: Winnipeg River
Geological Age: Archean Geochronological Age: 2.66 GA Geochron. Age Ref.: BEAKHOUSE
Dec 07, 2005 (W Bellinger) - Beakhouse (1991) describes the geology of the area: The Winnipeg River Subprovince is a dominantly granitoid domain within the central part of the western Superior Province. The Subprovince is flanked to the south by a granite-greenstone domain (western Wabigoon Subprovince) and to the north by a metasedimentary migmatite domain (English River Subprovince) and a greenstone domain (Bird River Subprovince). Granodioritic to granitic plutons, the granitic suite, and minor dioritic to granodioritic plutons, the mafic suite, were emplaced between 2.66 and 2.71 Ga. The granitic suite is interpreted to have originated by the partial melting of the older metatonalites in tectonically thickened crust. Beakhouse (1991) goes on to describe the Lount Lake Batholith: The various phases of the Lount Lake batholith are typical of the granitic suite. The most abundant rock type is medium-grained granodiorite commonly characterized by large (less than 10 cm in diameter; usually approximately 1 to 3 cm in their longest dimension), subhedral to euhedral, perthitic microcline megacrysts. On the basis of their textures, composition and phase equilibria considerations, these megacrysts have been interpreted to be late magmatic megacrysts rather than true phenocrysts or porphyroblasts (Beakhouse 1983). Biotite is the ubiquitous and dominant mafic phase. Subordinate hornblende occurs very locally in close proximity to amphibolitic enclaves and is interpreted to be xenocrystic. Common primary accessory phases include magnetite, epidote, sphene, zircon and apatite. Secondary alteration products include white mica, epidote and carbonate (after plagioclase), and chlorite and magnetite (after biotite).
| Rock Type | Rank | Composition | Texture | Relationship | Granodiorite | 1 | Graniute-Granodiorite | Coarse-Gr, Porphyritic | Host |
|---|
Dec 07, 2005 (W Bellinger) - Beakhouse (1991) goes on to describe the Lount Lake Batholith: The various phases of the Lount Lake batholith are typical of the granitic suite. The most abundant rock type is medium-grained granodiorite commonly characterized by large (less than 10 cm in diameter; usually approximately 1 to 3 cm in their longest dimension), subhedral to euhedral, perthitic microcline megacrysts. On the basis of their textures, composition and phase equilibria considerations, these megacrysts have been interpreted to be late magmatic megacrysts rather than true phenocrysts or porphyroblasts (Beakhouse 1983). Biotite is the ubiquitous and dominant mafic phase.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Quartz | Economic | Ore | ||||
| 2 | Microcline | Economic | Ore | ||||
| 3 | Orthoclase | Economic | Ore | ||||
| 4 | Plagioclase | Economic | Ore | ||||
| 1 | Biotite | Economic | Gangue | ||||
| 2 | Chlorite | Economic | Gangue | ||||
| Chlorite | Alteration | Chloritic | 1 | ||||
| Saussurite | Alteration | Saussuritization | 2 |
Dec 07, 2005 (W Bellinger) - Granite is composed of pink and red potassium feldspar phenocrysts which are .5 to 1 cm long. The matrix is made up of quartz, potassium feldspar and biotite. The biotite can form up to 50% of the matrix. The mineralogy is described in detail in a report by Independant Test-Labs Limited of Winnipeg, Mb. for J.E. Dunham of Kenora Gold Occurrences Inc. of Toronto, Ontario (Assessment Files,Kenora Resident Geologist's Files, Kenora): Microcline is mainly coarse-grained (crystals greater than 5 mm),subhedral to euhedral and is distinguished by albite and pericline polysynthetic twinning resulting in a distinctive grid pattern under crossed nicols. Orthoclase is medium-grained, anhedral and occasionally displays simple Carlsbad twins. Myrmekitic intergrowths of quartz in orthoclase occur mainly where orthoclase abuts against microcline. Quartz occurs an anhedral, fine to medium individual grains and also as very fine-grained, granular masses between some feldspar grains. Biotite occurs as medium- to fine-grained, euhedral to anhedral grains between feldspar grains and displays a random orientation. Plagioclase is medium-grained, subhedral and generally displays simple albite twinning. The mineral grains display an interlocking granular texture with no visible structural defects. Minerals Est. Interpretation Vol. % Alkali Feldspar: Microline-40, Primary majorOrthoclase-30, Quartz-15, Biotite-10, Plagioclase-5, minorOpaques-tr, accessoryChlorite-tr. CHEMICAL ANALYSIS: Sample No. 587MCK-0004, SiO2-74.01, Al2O3-14.44, Fe2O3-1.12, MnO- 0.01, MgO-0.20, CaO-1.40, Na2O-3.34, K2O-5.33, TiO2-0.11, P20-0.02.
Dec 07, 2005 (W Bellinger) - PHYSICAL PROPERTIES: Compressive Strength: 20,595 psi (142 MPa dry) 12,328 psi (85 MPa wet); Absorption: 0.28%; Bulk Specific Gravity: 2.61; Modulus of Rupture: 9.0 MPa dry 9.2 MPa wet; Abrasive Hardness: 49.25; Testing conducted by Independant Test-Lab Limited, Winnipeg, Mb. Two types of alteration occur in trace amounts. Some biotite grains have partially altered to chlorite. Most plagioclase display a small amount of very fine-grained saussurite alteration.
Map - Minaki to Sidney Lake, District of Kenora, Ontario
Publication Number: ARM39G Scale: 1:190,080 Date: 1997
Author: Derry D.R.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, Operation Kenora-Sydney Lake, Umfreville-Separation lakes sheet, District of Kenora
Publication Number: P1028 Scale: 1:63,360 Date: 1975
Author: Breaks F.W., Bond W.D., McWilliams G.H., Gower C.F., Findlay D.C., Stone D.
Publisher Name: Ontario Division of Mines
Location:
Mono - Dimensional Stone Occurrences and Deposits in Northwest Ontario
Publication Number: OFR5890 Date: 1994
Author: Hinz P., Landry R.M., Gerow M.C.
Publisher Name: Ontario Geological Survey
Location:
Article - Kenora Resident Geologist's District - 1990
Publication Number: MP152.002 Date: 1997
Author: Blackburn C.E., Hailstone M.H., Storey C.C., Perrault M.
Publisher Name: Ontario Geological Survey
Location:
File - Industrial minerals geologist files
Publication Number: IMF Date: 1996
Author:
Publisher Name:
Location: Kenora RGP
File - Kenora Resident Geologist Mineral Deposit Files
Publication Number: RGF Date: 1996
Author:
Publisher Name:
Location: Kenora RGP
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