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Ontario Geological Survey
Permanent Link to this Record:
MDI41N11SE00007
| Record Name(s) | Jordan - 1961, Jordan Island - 2000 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1983-May-12 |
| Date Last Modified | 2022-Jul-22 |
| Created By | |
| Revised By |
Primary Commodities: Hematite (Gemstones)
Township or Area: Alarie
Latitude: 47° 35' 10.87" Longitude: -85° 1' 45.5"
UTM Zone: 16 Easting: 648173.62 Northing: 5272208.47 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 41N11SE
Point Location Description: Vein at north end of island
Location Method: Data Compilation
Access Description: The island is part of Lake Superior Provincial Park. The area is best accessed via gravel road (Gargantua Road) from Highway 17, for a distance of approximately 15 km. Jordan Island is situated approximately 5 km northwest of Gargantua Harbour and can be accessed by kayak or canoe from the harbour.
1909: Algoma Ore Properties - 2 ddh.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| ALARIE 0012 | 41N10NE0012 | 41N10NE0012 |
Province: Southern
Supergroup: Keweenawan Supergroup
Geological Age: Mesoproterozoic Geochronological Age: 1.10 MA Geochron. Age Ref.: OGS GOO VOL 1
Dec 07, 2005 (A Wilson) - The rocks of the Keweenawan Supergroup were deposited in and marginal to the Midcontinent Rift at approximately 1.1 Ga. They unconformably overlie the migmatites of the Ryan Mineral Location.
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Rhyolite | Host |
|---|---|---|---|---|
| Breccia-unsubdivided | 2 | Host | ||
| Vein | 3 | Calcite | Host |
Dec 07, 2005 (A Wilson) - The breccia contains about 20% quartz and calcite matrix and the rhyolitic fragments range from a fraction of an inch to several feet in size. The rhyolite host is fine-grained and locally contains feldspar and hematite phenocrysts. The rhyolite is complexly folded and shows good flow textures in several locations on the island.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Hematite | Economic | Ore | ||||
| 1 | Calcite | Economic | Gangue | ||||
| 2 | Quartz | Economic | Gangue |
Dec 07, 2005 (A Wilson) - Hematite is locally botryoidal and is found as lenses, up to 6 inches in size, withn the breccia zone.
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| Rank | Characteristic |
|---|---|
| 2 | Breccia |
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 100 | .45 | 345 | 44 | 1.10 MA | GOOD VOL 1 |
Map - Township 31, Range 19 [Alarie Township], District of Algoma
Publication Number: P0128 Scale: 1:15,840 Date: 1997
Author: Ayres L.D.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of townships 31 and 30, ranges 20 and 19, District of Algoma
Publication Number: R069 Page: 81 Date: 1969
Author: Ayres L.D.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Townships 31 and 30, range 19, Algoma District
Publication Number: M2138 Scale: 1:31,680 Date: 1968
Author: Ayres L.D.
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