Ontario Geological Survey
Permanent Link to this Record:
MDI31L01NE00003
| Record Name(s) | McVittie Group 2 - 1982 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1991-Feb-11 |
| Date Last Modified | 2022-Jan-30 |
| Created By | |
| Revised By |
Primary Commodities: Graphite
Township or Area: Maria, Maria, Maria, Maria
Latitude: 46° 13' 3.35" Longitude: -78° 2' 41.24"
UTM Zone: 17 Easting: 727926.002 Northing: 5122469.995 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 31L01NE
Point Location Description: approximate
Location Method: Based on Assessment
1982: Donegal Resources Ltd. - ground geophysics, trenching, sampling, bulk sampling
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 31L08SE0001 | 31L08SE0001 | 31L08SE0001 |
Province: Grenville
Subprovince: Central Gneiss Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Paragneiss | 1 | Host |
|---|
Jan 11, 2012 (A Wilson) - Graphite occurs within semipelitic and pelitic gneiss units within, the host paragneiss sequence. Graphitic horizons outcrop along Highway 17, and are marked by a pronounced gossan. At these locations, graphite-sillimanite-plagioclase-quartz-biotite metapelites occur intercalated with lesser barren biotite-quartzfeldspar-garnet (red) gneisses. At least seven mineralized horizons are identified within the section along the highway and these vary from 2.5m to greater than 7m thick. The intercalated barren zones average about 1.5m thick. Occasionally a relatively barren zone will carry coarse flake along mineral segregation interfaces and as clots in the quartz-rich sections.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Graphite | Economic | Ore |
Jan 11, 2012 (A Wilson) - Within the mineralized facies, graphite occurs as disseminated f lake, (2% to 8% on visual estimate) averaging 2mm to 3mm in size. Flake to 5mm was observed associated with the quartz-rich segregations. Two units of grey (white weathering) graphite + quartz + white feldspar gneiss were present in the showings and these units were relatively high-grade, (perhaps approaching 10%). All of the mineralized horizons can be considered as being open, and in that regard, outcrops of mineralized gneiss were observed approximately 350m south of the highway. The greatest graphite ore grade values are found at trenches l, 3, 9, K, L, and R, (5.75%, 4.98%, 5.80%, 4.60%, 4.65% and 6.00% respectively), while the lowest grades are found at trenches F and G (1.02% and 0.9% respectively). The overall average estimated graphite ore grade is 3.23%.
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 350 |
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