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Ontario Geological Survey
Permanent Link to this Record:
MDI31D16NW00280
| Record Name(s) | Bear Lake Diggings - 2003, Gibson Road - 2003 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1991-Mar-23 |
| Date Last Modified | 2023-Jan-09 |
| Created By | |
| Revised By |
Primary Commodities: Apatite (Gemstones)
Secondary Commodities: Amethyst, Feldspar (Gemstones)
Township or Area: Monmouth
Latitude: 44° 57' 44.26" Longitude: -78° 19' 6.87"
UTM Zone: 17 Easting: 711476 Northing: 4982260 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31D16NW
Point Location Description: 0.5 km south of Long Lake
Location Method: Data Compilation
Access Description: The Bear Lake Diggings were situated north and south of the road dividing Concession 10 and 11.
1995-99: C. Fouts - prospecting; trenching; mapping and trenching.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Monmouth142 | 31D16NW2002 | 31D16NW2002 |
| Monmouth145 | 31D16NW2003 | 31D16NW2003 |
| Monmouth152, OP99-117, 2.17745 | 31D16NW0028 | 31D16NW0028 |
| 2.16208 | 31D16NW0017 | 31D16NW0017 |
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Hornblende-Syenite | Host |
|---|---|---|---|---|
| Vein | 2 | Calcite | Contains |
Jan 27, 2017 (C Papertzian) - North-west trending calcite vein-dykes near Bear Lake, Ontario are up to 1.5 meters wide and 120 meters long and are cored by pegmatitic, pink calcite with 1-5% sub-parallel green to red euhedral apatite rystals up to 0.5 meters long. Rare instances of monzaite on apatite have been reported. The vein-dyke selvages are composed of pegmatitic bytownite, edenite, biotite, titanite and apatite. Occurrences of edentite and biotite vary across as well as along strike in several of the veins. Isolated crystals of silicate minerals can be found within the clacite cores. the vein-dykes, intruded into an amphibolite gneiss, crosscut local gneissic foliation.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Amethyst | Economic | Ore | ||||
| 2 | Apatite | Economic | Ore | ||||
| 3 | Feldspar | Economic | Ore | ||||
| 4 | Hornblende | Economic | Ore | ||||
| 5 | Rutile | Economic | Ore | ||||
| 6 | Titanite | Economic | Ore | ||||
| 7 | Biotite | Economic | Ore | Massive | |||
| 8 | Calcite | Economic | Ore | Massive |
Jan 27, 2017 (D Laidlaw) - TYPE: sunstone
Date: Mar 17, 2004
Geologist: C Papertzian
Notes: This site is known for its large crystals of hornblende, biotitie, apatite and titanite. Hornblende occurs as large crystals and crystal groups in buff to pink coarsely crystalline calcite. Large crystals of biotite about 30 cm in diameter, and light green apatite crystals measuring up to 30 cm long occur with the amphibolite. Titanite crystals measuring up to 20 cm long occur in calcite and in the granitic rocks. The calcite fluoresces bright pink in 'short' ultraviolet light. The occurrence is exposed by several shallow pits along the western end of the Gibson Road. The site was visited on September 17th, 2003. Evidence of the pits and trenches could be seen. A number of them had been backfilled by the Bancroft Chamber of Commerce.
Date: Dec 05, 2006
Geologist: D Laidlaw
Notes: The site was visited in June 2006 and the location was GPS'd, 17T 0711414E, 4982296N
Book - Rocks and minerals for the collector: Bancroft - Parry Sound area and southern Ontario; Geological Survey of Canada, Miscellaneous Report 39
Publication Number: Misc Rep 39 Page: 90 Date: 1986
Author: Sabina, A.P.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/121046
File - Resident Geologist files Resident Geologist files Monmouth 135, Monmouth 137, Monmouth 139
Publication Number: Date:
Author:
Publisher Name:
Location: Tweed RGP office
Map - Monmouth Township, Haliburton County
Publication Number: M2174 Scale: 1:31,680 Date: 1970
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office