Ontario Geological Survey
Permanent Link to this Record:
MDI000000002298
| Record Name(s) | Nikka Cu-Zn Deposit Zone 8 - 2020, McFaulds No. 8 - 2017 |
|---|---|
| Related Record Type | |
| Record Status | Occurrence |
| Date Created | 2019-Jun-27 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Therese Pettigrew |
| Revised By | Therese Pettigrew |
Primary Commodities: Copper, Zinc
Secondary Commodities: Gold, Silver
Township or Area: BMA 527 861
Latitude: 52° 50' 5.26" Longitude: -86° 1' 39.47"
UTM Zone: 16 Easting: 565504 Northing: 5854336 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 43D16SE
Point Location Description: Approximated from map in Noront’s May 11, 2020 press release: https://norontresources.com/noront-ann
Location Method: Data Compilation
2017-18: Noront conducted EM and ground gravity surveys, high resolution airborne magnetic surveys, and drilled 13 DDH totaling 6120 m.
Province: Superior
Subprovince: Sachigo
Terrane: North Caribou
Domain: Oxford-Stull
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Near |
|---|---|---|---|---|
| Intermediate Tuff | 2 | Tuffs | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Sphalerite | Economic | Ore |
Jun 27, 2019 (Therese Pettigrew) - The McFaulds deposits are hosted within a northeast-trending, northwest-facing, folded sequence of altered felsic to intermediate tuffs and lesser flows deposited into an interpreted half graben based on the asymmetry of the volcanic basin. Mineralization consists dominantly of pyrite-chalcopyrite-sphalerite rich banded sulfides and stringers. Broad zones of chlorite alteration mark the exhalative horizons. Noront discovered the McFaulds No. 8 zone in DDH MCF-17-88, which returned 2.0% Cu, 3.6% Zn, and 7.8 g/t Ag over 9.0 m. DDH MCF-18-98 returned 26.4 m at 2.1% Cu, 3.4% Zn, 5.5 g/t Ag. The Cu-rich Main Zone from 711.0-727.7 m returned 3.1% Cu, 1.8% Zn, and 7.3 g/t Ag, including the high-grade Cu base from 725.7-727.7 m with 8.9% Cu, 11.4% Zn, and 19.8% Ag. The Zn-rich Main Zone from 724.7-733.8 m returned 2.5% Cu, 9.7% Zn, and 6.7 g/t Ag, including the high-grad Zn base from 730.3-733.8 m with 0.6% Cu, 14.2% Zn, and 3.5 g/t Ag. DDH MCF-18-92 returned 1.3% Cu, 5.9% Zn, 10.3 g/t Ag, and 0.5 g/t Au. The McFaulds No. 8 zone is 175 m into the footwall of the McFaulds No. 3 zone. The McFaulds VMS deposits are situated within in a structurally controlled volcanic basin near the top of the Muketei Assemblage, stratigraphically above the ultramafic sills hosting the Ni-Cu-PGE and chromite resources and above the large Thunderbird layered ferrogabbro body (Noront website: http://norontresources.com/projects/mcfaulds-deposit/; Noront press release, October 2, 2018).
| Rank | Classification |
|---|---|
| 1 | VMS Base Metal |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Nikka No. 8 Main | 2020 | Inferred Mineral Resource | 1800000 | Noront press release May 11, 2020 | Copper 1.8 Percent, Gold 0.2 Grams per Tonne, Silver 5.8 Grams per Tonne, Zinc 1.8 Percent | |
| Nikka No. 8 Footwall | 2020 | Inferred Mineral Resource | 1100000 | Noront press release May 11, 2020 | Copper 2.8 Percent, Gold 0.2 Grams per Tonne, Silver 6.5 Grams per Tonne, Zinc 0.04 Percent |
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