Ontario Geological Survey
Permanent Link to this Record:
MDI31F04SE00083
| Record Name(s) | Egan Chute - 1984, Egan Chute Corundum Occurrence - 2000 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1984-May-29 |
| Date Last Modified | 2022-May-16 |
| Created By | |
| Revised By |
Primary Commodities: Corundum (Gemstones)
Township or Area: Dungannon
Latitude: 45° 4' 24.26" Longitude: -77° 44' 6.1"
UTM Zone: 18 Easting: 284713.414 Northing: 4994744.281 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F04SE
Point Location Description: Dot symbol ' Cor ' nearest Egan Chute and W bank of York River.
Location Method: Conversion from MDI
Access Description: The deposit is 450 m N of the Goulding-Keene nepheline quarry and is reached by a trail along the W side of the York River. Outcrops of sodalite occur along the trail and deep blue corundum is seen in several places and at the blasted area (about 180 m S of the chute).
Mineral location. c 1900 : opened as a corundum prospect and considered a potential sapphire occurrence at the time. This area is under intense pressure from rock collectors and is considered highly sensitive. The ' Egan Chute Proposal ' ( lots 11 and 12, con 11 and 12 - N of Hwy 500) has been recomended to protect this and other local areas of geological interest (c 1980).
Province: Grenville
Geological Age: Mesoproterozoic
Dec 07, 2005 (C Papertzian) - The chute is located at the S end of the York River nepheline syenite gneiss belt where nepheline gneisses are associated with alkalic rocks and intercalated with marble and paragneiss. A complete gradation from nepheline-rich gneisses to calcareous metasediments can be seen, evidence for the metamorphic- metasomatic origin of the gneisses. A 1.5 m thick body of plagiooclase- nepheline-corundum-muscovite-biotite gneiss, forming a 60 m long lens, contains corundum (up to 14 %). The corundum is milky grey to light blue, highly fractured and usually rimmed by muscovite. There is some galena.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Apatite | Economic | Ore | ||||
| 10 | Corundum | Economic | Ore | ||||
| 15 | Galena | Economic | Ore | ||||
| 20 | Muscovite | Economic | Ore | ||||
| 25 | Scapolite | Economic | Ore | ||||
| 30 | Sodalite | Economic | Ore |
Part - Mineral occurrences in the north Hastings area
Publication Number: ARV52-03 Page: 19 Date: 1998
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of Dungannon and Mayo townships
Publication Number: ARV64-08 Page: 44 Date: 1998
Author: Hewitt D.F., James W.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Nepheline syenite deposits of southern Ontario
Publication Number: ARV69-08 Page: 71, 76 Date: 1997
Author: Hewitt D.F., Armstrong H.S., Tilley C.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, industrial minerals of the Pembroke-Renfrew area, southern Ontario
Publication Number: P2209 Scale: 1:126,720 Date: 1980
Author: Vos M.A., Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Pembroke-Renfrew area, part 2
Publication Number: MDC022 Page: 27-29 Date: 1981
Author: Storey C.C., Vos M.A.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 35, 231 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Journal - Some Classic Mineral Localities of Southeastern Ontario; The Mineralogical Record vol. 13, no. 4
Publication Number: Min Rec Page: 203 Date: 1982
Author: Hogarth, D.D., Steacy, H.R., Rose, E.R., Moyd, L.
Publisher Name: The Mineralogical Record
Location:
Publication - Classic mineral collecting localities in Ontario and Quebec; Geological Survey of Canada, Miscellaneous Report 37
Publication Number: GSC MR 37 Page: 61-62 Date: 1983
Author: Hogarth, D D; Moyd, L; Rose, E R; Steacy, H R
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/119504
Publication - Catalogue of Canadian minerals; Geological Survey of Canada, Paper 80-18
Publication Number: Paper 80-18 Page: 82, 120 Date: 1980
Author: Traill, R J
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/119519
Mono - A catalogue of the Ontario localities represented by the mineral collection of the Royal Ontario Museum
Publication Number: MP070 Page: 124,193,261,334,434, Date: 1977
Author: Satterly J.
Publisher Name: Ontario Geological Survey
Location:
Publication - Rock and mineral collecting in Canada, volume II: Ontario and Quebec; Geological Survey of Canada, Miscellaneous Report 8
Publication Number: GSC MR 8 Page: 78 Date: 1964
Author: Sabina, A P
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/119882
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