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Ontario Geological Survey
Permanent Link to this Record:
MDI52P08NW00005
Record Name(s) | Alpamayo Occurrence - 1995, Doorigan Property - 1995, Boylen Occurrences - 1995 |
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Related Record Type | Partial |
Record Status | Occurrence |
Date Created | 1996-Dec-27 |
Date Last Modified | 2022-Jan-05 |
Created By | C Salo |
Revised By | Therese Pettigrew |
Primary Commodities: Copper, Zinc
Secondary Commodities: Lead, Gold, Silver
Township or Area: Petawanga Lake Area
Latitude: 51° 24' 53.54" Longitude: -88° 16' 5.96"
UTM Zone: 16 Easting: 411800 Northing: 5696725 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52P08NW
Point Location Description: Location obtained from assessment file map.
Location Method: Data Compilation
Access Description: The Boylen Occurrences are located approx. 130 km east of the town of Pickle Lake, Ontario and 1 to 3 km south of Kawitos Lake on the Albany River waterway. Access to the area is by boat, west along the Albany River system from the Fort Hope First Nation, located 30 km to the east-northeast (scheduled flights travel to Fort Hope). Alternatively direct access map be obtained via float plane from Pickle Lake to Kawitos Lake, then south by foot along claim lines tothe occurrences.
1961-1962: M.J. Boylen conducted detailed geology, mag, EM, Airborne E.M. and magniphase surveys and diamond drilling (12 holes). Four shallow trenches blasted uncovering sulphide mineralization. - Seeber claim group- Four trenches, 5 ddh's (1090 feet). Morrison-Eden Group- Six ddh's (2319 feet). Ouilette-Eden Group - One DDH (835 feet). 1972: detailed Mag and EM south of Auger Lake by Imperial Oil Enterprises. 1976: New Jersey Zinc Exploration Co. completed 9 DDH's (1053 feet) on Ryley-Cormac Occurrence. 1986: Airborne MAG, EM and VLF by Aerodat for Gold Fields covering Ryley-Cormac Occurrence. 1987 Gold Fields drilled one 807 foot DDH northeast of original Boylen Occurrence. 1989: Prospecting, trenching and recon MAG and VLF-EM over Boylen occ. and Kawitos Lk. area. 1990: Falconbridge optioned 17 claims and staked 176 claims followed by linecutting, mapping, lithgeochemical survey, HLEM and MAG surveys and power stripping. 1991: Further linecutting by Falconbridge, geological grid mapping, 1723.5 m of diamond drilling. 1993 Noranda Ex. co. Ltd. bought 25% interest property. 1995 Noranda completed further MAG, Max-Min, recon and detailed mapping and airborne geophysics. 1995 Drilling conducted by Noranda.
Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
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2.9623 | 52P08NE0005 | 52P08NE0005 |
2.14627 | 52P08NE0001 | 52P08NE0001 |
2.16149 | 52P08NW0007 | 52P08NW0007 |
2.14477 | 52P08NE0002 | 52P08NE0002 |
2.51893 | 20000007220 | 20000007220 |
2.16148 | 52P08NE0009 | 52P08NE0009 |
63.5553 | 52P08NE0003 | 52P08NE0003 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Miminiska-Fort Hope
Geological Age: Neoarchean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
Nov 06, 2006 (Mark Puumala) - The Boylen Occurrences are hosted in a relatively narrow belt of metavolcanic rocks between Auger and Kawitos Lakes that is bounded to the north, south and east by felsic intrusions. Edwards (1991) has subdivided the rocks of this area into five geological domains that include the Western Volcanics, Central Volcanics, Cormac Volcanics, Southern Granitic Terrain and Northern Granitic Terrain. The strike direction of the metavolcanic rock units is influenced by the geometry of the granitic batholiths located to the south and north, and varies from northeast in the western part of the area to east-west in the east. Edwards (1991) indicates that the Western Volcanic Domain is comprised of mafic metavolcanic rocks that include massive and pillowed flows, as well as tuff. These rocks are bounded to the southeast by the Central Volcanic Domain and a significant structure referred to as the Auger Shear (Edwards 1991). The rocks of the Central Volcanic Domain include felsic tuff and reworked felsic sediments (Edwards 1991). The most notable feature of these rocks is the common occurrence of anastamosing brickwork-style, fracture-controlled chlorite-amphibole-garnet-magnetite alteration. Brickwork-style alteration was noted in most outcrop exposures, and the intensity of alteration is most pronounced in the vicinity of the Auger Shear. This type of alteration has only been noted in rocks of the Central Volcanic Domain, and has been interpreted by Edwards (1991) to be related to late structural events that produced the shear zone (i.e., not related to massive sulphide mineralization). The Central Volcanic Domain is bounded to the southeast by rocks of the Cormac Volcanic Domain. Edwards (1991) indicates that this domain is comprised of a variety of lithologies, including mafic metavolcanic flows (massive and pillowed), felsic tuff (crystal and lapilli), debris flows and massive biotitic units (possibly metamorphosed interflow sedimentary layers that commonly contain pyrrhotite and chalcopyrite). The majority of the surface exposures of VMS mineralization in this area (i.e., Boylen, Ryley-Cormac, Gold Fields, NJZ-76 and Nyla Occurrences) have been found within rocks of the Cormac Volcanic Domain. The Southern Granitic Terrain, which forms the southern boundary of the Cormac Volcanic Domain, is a coarse-grained quartz-feldspar-biotite intrusion . Edwards (1991) indicates that this intrusion contains chalcopyrite-bearing chlorite pods (Alpamayo Occurrence) and fracture-associated coarse-grained chlorite-biotite-garnet alteration near the contact with the Cormac Volcanics. The felsic intrusive rocks of the Southern Granitic Terrain have been classified as being part of the Hurst Lake Batholith by Wallace (1981a). Rocks of the Northern Granitic Terrain, which forms the northern boundary of the Central and Cormac Volcanic Domains is also indicated by Edwards (1991) to be a coarse-grained quartz-feldspar-biotite intrusion. This intrusion has been mapped by Wallace (1981b) as the Kawitos Lake Batholith. The rocks of the Western, Central and Cormac Volcanic Domains form a single west to southwest-trending volcanic rock sequence (Edwards 1991). Foliations are steeply-dipping and generally parallel the volcanic domain boundaries, with strike directions ranging from 030 in the southwest to 080 in the east. According to Edwards (1991), younging indicators interpreted from rocks of the Cormac Volcanic Domain generally suggest that the volcanic stratigraphy faces south. However, the results of detailed geological mapping in the vicinity of the Goldfields and Ryley-Cormac occurrences indicate the presence of a southwest-plunging synformal fold axis within the Cormac Domain. A significant northeast-striking shear zone referred to as the Auger Shear by Edwards (1991) has been inferred to be located at the contact between the Western and Central Volcanic Domains.
Rock Type | Rank | Composition | Texture | Relationship | Mafic pillowed flow | 1 | Flows | Pillowed | Near |
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Mafic Tuff | 2 | Mafic Tuff | Tuff | Near |
Granodiorite | 3 | Dikes | Near | |
Granitoid-Unsubdivided | 4 | Quartz-Feldspar-Biotite Int. | Schistose | Host |
Felsic Tuff | 5 | Felsic Tuff | Tuff | Near |
Mudstone | 6 | Argillaceous Rocks | Fine Grained, Med. Gray To Med Brown | Near |
Terrigenous-Clastic-Unsubdivided | 7 | Felsic Sediments | Reworked Felsic Material And Mud | Near |
Felsic flow breccia | 8 | Debris Flow | Coarse Volcaniclastics | Near |
Felsic Lapilli-Tuff | 9 | Felsic Lapilli Tuff | Lapilli Tuff | Near |
Dec 07, 2005 (C Salo) - WESTERN VOLCANICS: MAFIC FLOWS- Massive, med to crs. grained, composed of amph. with interstitial feld, grainsize from2-5 mm, genly. non foliated, associated with pillowed flows. PILLOWED MAFIC FLOWS: Fine grained, composed pred'y of amp and feld. Pillows from 1cmx5 cm to 75cmx200 cm. MAFIC TUFF: fine to v.fine grained, comp. pred'y of apmp and feld with lesser chl as retrograde product. Units are massive to finely laminated. CENTRAL FELSIC VOLCANICS: Felsic Tuff: fine grained, consist of 15 to 20% biotite in quarztofeldspathic matrix, infrequent lapilli in places, some crystal rich units. Felsic Sediments: Very fine grained, med grey to brn., finely laminated, consit of a mixture of mud and reworked felsic material, staurolite occurs infrequently. CORMAC VOLCANICS: Massive Mafic Flows: Dark green, fine to coars grained, similar to Western Volcanics. Pilowed Mafic Flows - Fine grained, med green, consist pred'y of amph and feld. Variable pillow size, some clas rich zones, some vesicular zones, associated mafic flank breccias associated. Felsic Volcaniclastic Tuff: Fine grained, pale greyish white and contain 3 to 5% biot. in a quartzofeldspathic matrix, some crystal tuff units, Debris Flows - Characterized by an open framework of lithic felsic and argillaceous clasts in a muddy pale green mafic to medium brown argillaceous matrix. Felsic Lapilli tuff: Consists of 30% felsic fragments and 5% biotite fragments in a fin grained quartz-feldspar-biotie matrix. SOUTHERN GRNITIC TERRAIN: The southern granitic terrain consits of a coarse grained quarz-feldspar-biotite intrusion, contaces are irregular and in some cases contain thin zones of massive magnetite. NORTHERN GRANITIC TERRAIN: The Northen Granitic Terrain consists of a coarse grained quartz-feldspar-biotite intrusion.
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
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1 | Chalcopyrite | Economic | Ore | ||||
1 | Chlorite | Economic | Gangue | ||||
2 | Biotite | Economic | Gangue | ||||
3 | Garnet | Economic | Gangue | ||||
Chlorite | Alteration | Chloritic | 1 | Strong | Stockwork | ||
Biotite | Alteration | Biotitic | 2 | Medium | Stockwork | ||
Garnet | Alteration | Garnetization | 3 | Strong | Stockwork |
Dec 07, 2005 (C Salo) - The Alpamayo showing is characterized by 2 small 0.5 m wide chalcopyrite bearing chorite pods wthin granite. The showing is associated with a mag anomaly an VLF liners which are interpreted a representing large fractures West of the showing are coarse grained fracture controlled chlorite-biotite-garnet alteration zones (sulphide burned on weathered exposures) within the granitic host. The fractures trend 100 deg to 120 deg and contain 15 to 20% coarse grained biotite, and 3 to 10 % garnet (porphyroblasts up to 15 mm in size). The granitic host near the fracture alteration contains 40% quartz eyes from 3 mm to 8 m in size. The presence of hydrothermally altered intrusive rocks was originally speculated as resulting from the interaction of a subvolcanic intrusive and a hydrothermal cell. The granitic rocks appear to be part of a basement complex and the relationships of the alteration and mineralization are uncertain. Assay Data Surface Grab: 1.8% Cu, 5.85% Cu, 3.22% Cu (S. Parent, 1989) - Assay of up to 0.045 oz Au/t in one of these samles.
Dec 07, 2005 (C Salo) - The Alpamayo showing is characterized ty 2 small 0.5 m wide chalcopyrite bearing chorite pods wthin granite. The showing is associated with a mag anomaly an VLF liners which are interpreted a representing large fractures West of teh showing are coarse grained fracture controlled chlorite-biotite-garnet alteration zones (sulphide burned on weathered exposures) within the granitic host. The fractures tend 100 deg to 120 deg and contain 15 to 20% coarse grained biotite, and 3 to 10 % garnet (porphyroblasts up to 15 mm in size). The granitic host near the fracture alteration contains 40% quartz eyes from 3 mm to 8 m in size. The presence of hydrothermally altered intrusive rocs was originally speculated as resulting from the interaction of a subvolcanic intrusive and a hydrothermal cell. The granitic rocks appear to be part of a basement complex and the relationships of the alteration and mineralization are uncertain.
Rank | Classification |
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1 | VMS Base Metal |
Rank | Characteristic |
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1 | Unknown |
Map - Ontario geological map, west central sheet
Publication Number: M2199 Scale: 1:1,013,760 Date: 1970
Author: Ayres L.D., Lumbers S.B., Milne V.G., Robeson D.W.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Map - Fort Hope-Lansdowne House sheet, geological compilation series, Cochrane, Kenora, and Thunder Bay districts
Publication Number: M2237 Scale: 1:253,440 Date: 1972
Author: Thurston P.C., Carter M.W., Riley R.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Book - OPERATION FORT HOPE
Publication Number: MP042 Scale: Date: 1970
Author: Thurston, P.C. and Carter, M.W.
Publisher Name: Ontario Ministry of Northern Development and Mines
Mono - Mineral Occurrences and Prospects in the Fort Hope-Winisk Area
Publication Number: OFR5926 Scale: Date: 1995
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
Map - Fort Hope area, District of Kenora (Patricia Portion), Ontario
Publication Number: ARM38B-01 Scale: 1:190,080 Date: 1997
Author: Burwash E.M.
Publisher Name: Ontario Dept. of Mines
Map - Precambrian Geology of the Miminiska Lake Area, Fort Hope Greenstone Belt
Publication Number: P3764 Scale: 1:50,000 Date: 2012
Author: Buse S.
Publisher Name: Ontario Geological Survey
Map - Geological Compilation of the Miminiska-Fort Hope Area, Eastern Uchi Domain
Publication Number: P3611 Scale: 1:250,000 Date: 2009
Author: Madon Z.B., McIlraith S.J., Stott G.M.
Publisher Name: Ontario Geological Survey
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