Ontario Geological Survey
Permanent Link to this Record:
MDI42C03NE00035
| Record Name(s) | Porphyry Zone Prospect - 1989 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2000-Dec-14 |
| Date Last Modified | 2022-Sep-09 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Keating
Latitude: 48° 14' 37.76" Longitude: -85° 12' 37.06"
UTM Zone: 16 Easting: 632871.34 Northing: 5344948.97 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C03NE
Point Location Description: Grid on north side of Iron Creek
Location Method: Data Compilation
Access Description: The site is accessible via the Eagle River Mine/Paint Lake road. Drive west along the road for approximately 16 km to the bridge over the University River. Take the Iron Lake bush road north west for approximately 2.5 km. The occurrence is located on the north side of Iron Creek.
1980-83: International Corona Resources - airborne geophysics, mapping, soil survey, ground geophysical survey. 1989-90: Corona Corporation - mapping, sampling, stripping, 6 ddh (732 m), channel sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| WP Abotossaway-29 | 20000018787 | 20000018787 |
| WP Corbiere-14 | 42C06SE0002 | 42C06SE0002 |
| Keating-0017 | 42C07SW0031 | 42C07SW0031 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (A Wilson) - The gold mineralization of the Porphyry Zone coincides with an abrupt change in the strike of the intrusive from 70 to 85 degrees.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Sheared | Near |
|---|---|---|---|---|
| Quartz Diorite | 2 | Quartz Diorite | Footwall | |
| Schist-Unsubdivided | 3 | Sericitic | Near | |
| Porphyry-unsubdivided | 4 | Granodiorite | Sheared | Host |
Dec 07, 2005 (A Wilson) - Gold mineralization is associated with a complex felsic intrusive body that appears to have been emplaced along the main volcanic-metasedimentary contact. Mafic metavolcanics have been observed to the north of the porphyry zone where they are composed of massive to pillowed flows. The foot wall to the intrusion consists of quartz diorite and is composed of feldspar and chloritized amphibole. Quartz, sericite, magnetite and leucoxene are commonly present. The felsic intrusive complex varies from quartz porphyry to feldspar porphyry to granodiorite. At least three sets of quartz veins have been developed within ths intrusion. The veins normally extend a few tens of centimeters into the quartz diorite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Tourmaline | Economic | Gangue | ||||
| Ankerite | Alteration | Carbonatization | 1 | Medium | Replacement | ||
| Sericite | Alteration | Sericitization | 2 | Medium | Replacement |
Dec 07, 2005 (A Wilson) - The quartz veins vary in thickness from 1 mm to 25 cm. Carbonate forms up to 35% of the veins and pyrite forms up to 10% of the veins. Grab samples from the quartz-carbonate-pyrite veins returned values up to 2097 ppb Au. A single grab sample from the fractured and veined granodiorite assayed 24.5 g/t Au. One section of drill core from KE-2 assayed 3.8 g/t Au over 2.8 m. Visible gold was observed in a quartz vein. Channel samples have returned values up to 1.8 g/t Au over 11 m.
| Rank | Characteristic |
|---|---|
| 2 | Concordant |
| 1 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Irregular | 250 | 15 |
File - Resident Geologist files WP Keating-2
Publication Number: Date:
Author:
Publisher Name:
Location: SSM RGP office
Map - Geology of the Iron Lake Area
Publication Number: OFM0116 Scale: 1:15,840 Date: 1988
Author: Reilly B.A.
Publisher Name:
Location:
MonoMap - Geology of the Pukaskwa River-University River area, districts of Algoma and Thunder Bay
Publication Number: R153 Date: 1977
Author: Bennett G., Thurston P.C.
Publisher Name: Ontario Division of Mines
Location:
Map - University River, Algoma and Thunder Bay districts
Publication Number: M2333 Scale: 1:63,360 Date: 1976
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Division of Mines
Location:
Mono - Geology of the Iron Lake area
Publication Number: OFR5783 Date: 1991
Author: Reilly B.A.
Publisher Name: Ontario Geological Survey
Location:
Map - Operation Pukaskwa, districts of Algoma and Thunder Bay
Publication Number: P0541 Scale: 1:126,720 Date: 1997
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office