Geology and Mineralization
Geology and Mineralization
The Cape Spencer Project is centered along the gold bearing Millican Lake Fault, a regional splay of the Caledonia and Cobequid Fault zones. The Property is underlain by Precambrian Millican Lake granite, and Broad River and Cape Spencer volcanic and sedimentary rocks. The Precambrian stratigraphy is unconformably overlain by and in fault contact with younger Carboniferous sedimentary rocks of the Lancaster Formation.
Gold mineralization at Cape Spencer is hosted within Precambrian Millican Lake granite or bounding Broad River Group and Cape Spencer volcanic and sedimentary rocks, with mineralization and alteration focused along strongly faulted and sheared contacts between the two lithologies. Alteration consists of pervasive and patchy illite + pyrite + quartz ± iron carbonate ± sulfide veins and stockworks with 2-5% total sulfides consisting of pyrite, galena, chalcopyrite or sphalerite, and locally show trace amounts of visible gold.
There are several gold prospects that warrant additional exploration over a 15 kilometre strike outside of the Pit and Northeast Zones particularly in the eastern half of the property that will initially be a primary focus for Magna Terra.
Highlights from historic exploration work (all drill and channel intercepts reported as core length; true width unknown) outside of the main deposit areas from 1982 to 2004 include:
Cape Spencer Mine (Pit Zone) – Past-Producing (1985-1986) Mine. Highlight assays include:
- 13.89 g/t gold over 2.46 metres within a zone grading 4.76 g/t gold over 9.45 metres (GX-86-09);
- 6.22 g/t gold over 1.52 metres within a zone grading 2.13 g/t gold over 21.0 metres (GX-82-18);
- 27.08 g/t gold over 1.08 metres within a zone grading 5.10 g/t gold over 9.15 metres (GX-86-29); and
- 18.00 g/t gold over 1.50 metres within a zone grading 5.18 g/t gold over 8.25 metres (AB-04-10).
Northeast Zone - Located 400 metres northeast of the Cape Spencer Mine. Interpreted to be continuous with the Road Zone. Highlight assays include:
- 41.96 g/t gold over 2.45 metres within a zone grading 7.72 g/t gold over 16.2 metres (CS-87-06);
- 16.20 g/t gold over 1.5 metres within a zone grading 4.45 g/t gold over 19.0 metres (CS-87-08);
- 11.52 g/t gold over 3.0 metres within a zone grading 4.85 g/t gold over 10.5 metres (CS-87-13); and
- 12.54 g/t gold over 4.0 metres within a zone grading 4.26 g/t gold over 18.5 metres (CS-87-17).
Road Zone – 400-metre-long zone of gold-bearing alteration zone with an average width of 20 metres. This zone is interpreted to be the along strike continuation of the Northeast Zone. Highlight assays include:
- 16.28 g/t gold over 2.5 metres within a zone grading 1.81 g/t gold over 55.0 metres (MR-087);
- 10.35 g/t gold over 1.0 metres within a zone grading 1.49 g/t gold over 20.7 metres (MR-147); and
- 13.06 g/t gold over 2.0 metres within a zone grading 1.28 g/t gold over 18.0 metres (MR-105).
Emilio Trend – includes the Emilio Prospect at Eastern end of Property
- 7.86 g/t gold over 7.4 metres (AB-04-06; near surface);
- 12.00 g/t gold over 1.4 metres (chip) and 2.77 g/t gold over 3.0 metres (chip);
- Surface grab samples up to 168.00 g/t gold*;
- Zone A – Grab samples up to 53.50 g/t gold*;
- Zone C – Grab samples up to 8.92 g/t gold* and chip sample of 2.77 g/t gold over 3.0 metres; and
- Zone D – Five occurrences of visible gold with grab samples up to 7.12 g/t gold*.
Birches Zone – 300-metre-long gold-bearing alteration zone south of the Northeast Zone.
- 17.85 g/t gold over 1.0 metre within a zone grading 5.23 g/t gold over 4.0 metres (MR-150);
- 9.48 g/t gold over 1.0 metre within a zone grading 4.01 g/t gold over 4.0 metres (MR-149); and
- 3.60 g/t gold over 5.0 metres (AB-04-08).
- Historic drill assays of 8.71 g/t gold over 2.0 metres (drillhole MGB-88-2); and
- Historic grab samples up to 4.41 g/t gold**
Note: Analytical results are sourced in the Cape Spencer Project Technical Report (2019) – see “Technical Reports and Documentation Notes” below; “grab samples” are selected samples and are not necessarily indicative of mineralization that may be hosted on the property.
*Note: “grab and boulder samples” are selected samples and are not necessarily indicative of mineralization that may be hosted on the property.