Ontario Geological Survey
Permanent Link to this Record:
MDI000000003309
| Record Name(s) | New Road Zone - 2020 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2023-Feb-02 |
| Date Last Modified | 2023-Feb-03 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper, Antimony, Nickel, Chromium
Township or Area: Duckworth
Latitude: 48° 34' 1.67" Longitude: -90° 7' 20.49"
UTM Zone: 15 Easting: 712285 Northing: 5383336 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B09SE
Point Location Description: Sample A685618 from Assessment report 20000019257
Location Method: Based on Assessment
2020: Portofino Resources Inc. carried out prospecting and sampling. 2021: Portofino drilled 2 DDH totalling 537 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 3880, 3881 | 20000019257 | 20000019257 |
| 4543 | 20000020176 | 20000020176 |
| Rock Type | Rank | Composition | Texture | Relationship | Monzonite | 1 | weakly sheared |
|---|---|---|---|---|
| Syenite | 2 | weakly sheared | ||
| Diorite | 3 | |||
| Gabbro | 4 |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue |
Feb 02, 2023 (Therese Pettigrew) - The New Road Zone is a zone of rusty, strongly fractured to weakly sheared monzonite to syenite with up to 5% blebby to disseminated pyrite and quartz stringers with pyrite. Sampling returned up to 4.07 gpt Au with 0.87 ppm Sb & 255 ppm Cu (Sample A685618) from monzonite/syenite with quartz stringers and 1% pyrite (Assessment report 20000019257). In DDH GC-2021-01, the New Road Zone was intersected from 27.53 to 47.14 m (19.61 m interval). It was found to actually consist of diorite to gabbro bleached to varying degrees with potassic alteration and silicification. The zone contains 0.5-3% blebby pyrite with minor chalcopyrite throughout, often more abundant where the host rock is more strongly bleached. Minor quartz-carbonate or quartz stringers generally <1 cm are present throughout. Elevated Au values up to 270 ppb Au / 0.56 m were obtained from 29 – 38.17 m (9.17 m length). Samples also returned up to 321 ppb Cu (with 5 ppb Au). Higher Cu values do not necessarily correspond to higher Au values. Shoulder samples of the intrusive returned 1060 ppm Cr / 0.61 m and 1030 ppm Cr / 0.86m at the upper and lower contacts, respectively, along with 491 ppm Ni and 523 ppm Ni respectively. Sections of elevated Au also appear to be associated with slightly elevated Sb up to 1.69 ppm Sb / 0.54 m. In DDH GC-2021-02, the New Road Zone was intersected from 131.64-153 m depth. The gabbro / diorite is more bleached and pyritic than in the previous hole, especially at the upper contact, but no significant Au values were obtained from samples in this interval – only up to 7 ppb Au. Copper values up to 428 ppm / 1.51 m were obtained, as well as several elevated Cr & Ni values up to 1510 ppm Cr & 816 ppm Ni / 1.5 m (the highest Cr & Ni values of the hole), once more in mafic volcanics adjacent to sections of intrusive. Mafic volcanic intervals are more frequent within the zone in this hole (Assessment report 20000020176).
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Antimony | ICP-MS | .39 | ppm | .05 | ||
| Copper | ICP-MS | 141 | ppm | .2 | ||
| Gold | Atomic Absorption AA | Lead Fire Assay | 4070 | ppb | 5 |
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office