Ontario Geological Survey
Permanent Link to this Record:
MDI31D16NW00041
| Record Name(s) | Laronde Creek Nepheline - 1943 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1981-Dec-04 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Nepheline Syenite
Township or Area: Glamorgan
Latitude: 44° 53' 44.68" Longitude: -78° 19' 56.29"
UTM Zone: 17 Easting: 710636.63 Northing: 4974831.4 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31D16NW
Point Location Description: Outcrop symbol 0.45 km west of the east boundary and 2.7 km north of the south boundary, lot 34, con
Location Method: Data Compilation
Access Description: Nepheline rocks occur sporadically in a narrow belt, up to 3 chains wide, extending east from a point 8 chains west of Laronde Creek towards the metagabbro ridge to the east of the creek, and continuing as a fringing belt along the NW base of the ridge,
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Syenite | 1 | Nepheline | Host |
|---|---|---|---|---|
| Marble | 2 | Graphitic | Adjacent | |
| Gneiss-Unsubdivided | 3 | Nepheline-Hornblende-Plagioclase | Host |
Jan 25, 2017 (A Wilson) - The nepheline rocks are of 2 main types and the more abundant is the gneissic variety that occurs throughout the band. This is a dark nepheline-hornblende-plagioclase gneiss (+/- biotite). Nepheline varies from a few % to 60-70 % in thin bands. On the Pusey property, on a low knoll beside a long-abandoned logging road, theralite and theralitic canadite are separated from underlying marble by a 2-3 ft nepheline-oligoclase-biotite-(graphite)-(calcite) gneiss - believed to represent nephelinized marble adjacent to an igneous intrusion. Farther up the hill to the E are several small pits in a rock that is largely titanaugite and magnetite with minor hornblende, apatite, plagioclase and giesekite - possibly related to the essexite known to underlie the gabbro on lot 2, con 4 and lot 3, con 3, Monmouth. This is band 8 in the text.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Nepheline | Economic | Ore | ||||
| 2 | Apatite | Economic | Ore | ||||
| 3 | Graphite | Economic | Ore | ||||
| 4 | Magnetite | Economic | Ore |
Part - Nepheline syenite deposits of southern Ontario
Publication Number: ARV69-08 Page: 36, 44-45 Date: 1997
Author: Hewitt D.F., Armstrong H.S., Tilley C.E.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Glamorgan and Monmouth townships, Haliburton County
Publication Number: OFR5021 Page: 36, 44-45 Date: 1997
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 242 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Part - Mineral occurrences in the Haliburton area
Publication Number: ARV52-02 Page: 71, 73, 74 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
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