Ontario Geological Survey
Permanent Link to this Record:
MDI000000001709
| Record Name(s) | Canadian Shield Amethyst Mine - 2014, Blakely Breezy Lake Project - 2016, Pearl Amethyst - 2015 |
|---|---|
| Related Record Type | |
| Record Status | Producing Mine |
| Date Created | 2014-Jun-10 |
| Date Last Modified | 2021-Nov-17 |
| Created By | Mark Puumala |
| Revised By | Therese Pettigrew |
Primary Commodities: Amethyst
Township or Area: McTavish
Latitude: 48° 41' 27.57" Longitude: -88° 39' 55.53"
UTM Zone: 16 Easting: 377437 Northing: 5394444 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A10NE
Point Location Description: centre of active quarry trench
Location Method: Field Visit with GPS
Access Description: Turn onto Pearl Road No. 5 from Highway 11/17, then take first left after the railway tracks for 4 km and turn left onto the gated quarry access road
Interest in amethyst exploration in the Pearl area was sparked by the discovery of large amethyst veins near Elbow Lake in the 1950s during road construction. In the early 1960’s the occurrence was staked and ultimately was developed into the Thunder Bay Amethyst Mine. Additional prospecting activity during the 1960s uncovered numerous additional amethyst showings to the east of the Thunder Bay Amethyst Mine, in the area where the present-day Canadian Shield Amethyst Mine is located (OFR5891). 2006-8: K. Bartel carried out drilling and blasting, with minor extraction. 2013: MNDM Exploration permit issued to G. Blakely to allow for an exploration program consisting of mechanized drilling, stripping and pitting/trenching. 2014: The quarry operates under the authority of MNR Aggregate License No. 616261 which allows for the extraction of up to 7500 t/year within a 34.5 ha quarry area. 2015: G. Blakely carried out overburden stripping, drilling, and cleaning. 2016: G. Blakely carried out stripping, cleaning, and drilling of 2 DDH totalling 40 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.56654 | 20000013989 | 20000013989 |
| 2.57049 | 20000013995 | 20000013995 |
Province: Southern
Subprovince: Nipigon Basin
Formation Group: Sibley Group
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Quartz Monzonite | 1 |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Amethyst | ECONOMIC | ORE | ||||
| 2 | Sphalerite | ECONOMIC | ORE | ||||
| 3 | Galena | ECONOMIC | ORE | ||||
| 4 | Pyrite | ECONOMIC | ORE |
Jun 10, 2014 (Mark Puumala) - The Canadian Shield Amethyst Mine operates under MNR quarry permit number 616261. The quarry permit covers an area of 34.5 ha and allows for the annual extraction of up to 7500 tonnes
Feb 25, 2020 (Therese Pettigrew) - The Pearl Amethyst Project property is underlain by Archean quartz monzonite rocks of the Quetico subprovince and Proterozoic rocks of the Sibley group. A northeast-trending fault mineralized with amethyst (+/-sphalerite, +/-galena, +/-pyrite) trends though the central portion of the property (Assessment report 20000013989).
| Rank | Classification |
|---|---|
| 1 | Vein |
Date: Nov 08, 2013
Geologist: Mark Puumala
Notes: The active amethyst quarry pit is located at UTM Zone 16, 377438E, 5394444N, follows a 060-striking fault/breccia zone that occurs near the unconformable contact between Granitoid rocks and the overlying Sibley Group. Granitic rocks are exposed on the north side of the fault, while sedimentary rocks of the Sibley Group are exposed to the south. Amethyst occurs in veins and vugs within the breccia zone. Another breccia zone is exposed in outcrop approximately 45 m to the southwest of the working pit at UTM Zone 16, 377397E, 5394424N. Here, the dominant strike of the veins is 030. Vein filling minerals include quartz, amethyst and smoky quartz. Breccia fragments include a mixture of granitic and sedimentary clasts. Conglomerate, most likely representative of the basal unit of Sibley Group rocks), is exposed at the southern end of the outcrop.
Map - Geological series, McTavish Township (west part of north half), District of Thunder Bay
Publication Number: P0720 Scale: 1:15,840 Date: 1997
Author: McIlwaine W.H.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Mono - Amethyst in the Thunder Bay Area
Publication Number: OFR5891 Scale: Date: 1994
Author: Garland M.I.
Publisher Name: Ontario Geological Survey
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office