Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31D15NE00065

Record: MDI31D15NE00065

General

Mineral Record Identification
Record Name(s) Hwy 121 Roadcut - 1984
Related Record Type Simple
Record Status Discretionary Occurrence
Date Created 1991-Jun-28
Date Last Modified 2022-Jan-05
Created By Q Unknown
Revised By A Wilson

Commodities

Primary Commodities: Zinc



Location

Township or Area: Snowdon

Latitude: 44° 51' 10.14"    Longitude: -78° 40' 39.25"

UTM Zone: 17    Easting: 683511.42   Northing: 4969224.21    UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31D15NE

Point Location Description: Precise

Location Method: Based on Assessment

Access Description: 1.0 km northeast of Plewman Lake on Highway 121.



Geology

Province: Grenville

Subprovince: Central Metasedimentary Belt

Terrane: Bancroft

Geological Age: Mesoproterozoic  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Gneiss-Unsubdivided 1 Is
Pegmatite 2 Syenitic Adjacent

Lithology Comments

Jan 06, 2017 (A Wilson) - Rusty-weathering gneiss adjacent to a syenite pegmatite dike near the margin of the Glamorgan Gneiss Complex on Highway 121.




Mineralization Comments

Jan 06, 2017 (A Wilson) - Samples collected from a gneiss adjacent to a pegmatite near Highway 121 assayed 173 ppm Cu and over 900 ppm Zn on samples collected by field party personnel. The adjacent pegmatite dike contains only 39 ppm Cu and 16 ppm Zn, and probably only acted as a heat source, and not a source of the metals. This is a newly reported occurrence.



Mineral Record Details

Classification
RankClassification            
1 Pegmatite
Characteristics
Rank Characteristic            
1 Stratiform

References

MonoMap - Geology of the Howland area, Haliburton, Peterborough and Victoria counties

Publication Number: OFR5639 Scale:     Date: 1987

Author: Easton R.M.

Publisher Name: Ontario Geological Survey


Map - Geological series, Precambrian geology, Howland area, Haliburton, Peterborough, and Victoria counties

Publication Number: P2699 Scale: 1:15,840    Date: 1984

Author: Easton R.M., Bartlett J.R.

Publisher Name: Ontario Geological Survey


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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office