Two main structural trends exist at LAURION’s Ishkoday property.
These are northeast-southwest trending quartz-sulphide and polymetallic veins, and east-west to east-southeast trending faults. Most of LAURION’s Ishkoday veins are oriented northeast-southwest, and represent a dilatant crack-seal type veining with minor associated shearing. Dextral movements along the east to southeast trending faults are thought to represent the mechanism which produced the northeast dilatant features hosting the gold-bearing quartz veins.
Gold is associated with quartz(-carbonate) veins hosted by felsic to intermediate meta-volcanics, and located often marginal to felsic intrusions (either dykes, stocks or plutons). Veins are typically sigmoidal or lenticular and free visible gold is common. Sulphide content within such veins ranges from trace to 40%. Coarse pyrite, pyrrhotite, chalcopyrite, sphalerite and galena may be present in the veins. Gold usually occurs as either in quartz veins as free coarse gold or in fractured sulphides. Gold can also occur in sheared chlorite and sulphide rich wall rocks.
Historic surface outcrop stripping, channel sampling and assaying of Quartz Veins was completed by Phoenix Gold Mines Ltd. (“Phoenix Gold”) in the 1980’s. The Phoenix Gold report (“1986 Exploration Program Report, Sturgeon River Gold Mines Property, 34 pages, by L.O. Koskitalo, February 1988”) identifies individual and sets of northeast-southwest trending quartz veins up to 1 km lengths, hosting significant gold values, attesting to their individual prospectivity. For example:
- The combined Marge (314m along the 36cm wide vein graded 17.62 g/t gold) and “F” (21m along the 25cm wide vein yielded 30.72 g/t gold) Veins.
- The Nos. 8/11 Vein (40m along the 29cm wide vein graded 0.89 g/t gold; and 10m along the 12cm wide vein yielded 2.50 g/t gold); and
- The No. 85 (21m along the 19cm wide vein yielded 20.26 g/t gold) and “A” (6.5m along the 98cm wide vein grading 24.44 g/t gold; 11m along the 39cm wide vein grading 9.60 g/t gold; and 13m along the 18cm wide vein grading 23.41 g/t gold) Veins.
There are a number of other significant gold results, including:
- 35.5m length over a 7.2cm width grading 31.57 g/t gold carrying visible gold (A9 Quartz Vein);
- 21.0m length over a 9.0cm width grading 105.99 g/t gold, also carrying visible gold (A11Quartz Vein);
- 53.2m length over a 22.5cm width grading 14.71 g/t gold (85-A2 Quartz Vein);
- 55.8m length over 13.8cm width grading 21.90 g/t gold (85-A2B Quartz Vein);
- 56.5m length over 37.2cm width grading 12.86 g/t gold (85-A6 Quartz Vein); and
- 43.2m length over 73.5cm width grading 8.33 g/t gold (A6 Quartz Vein).
In summary, field prospecting and mapping identified two multi-kilometric sectors within the Target Area, the historic '85-A' and 'Marge-F' quartz veins sectors. Both contain abundant multi-directional and anastomosing quartz veins. Historic assay results from Phoenix Gold (1988) showed significant gold mineralization in quartz veins at surface: 17.62 g/t gold with Visible Gold over a 36cm width along a strike length of 314m; 21m of 30.72 g/t gold over 25cm width ('F' Vein); 23.41 g/t gold over a 18cm width along a strike length of 13m ('A-2' Vein); and 20.26 g/t gold over a 19cm width along a strike length of 21m ('85-A2' Vein.
The '85-A' Vein sector defines a minimum 1,500m long by 500m wide corridor containing 56 centimeter to meter wide quartz veins, one of which, the 'A-2' Vein is multi-kilometric long. The '85-A2' Vein shows interconnected 045° and 020° oriented quartz veining forming anastomosing stockworks. At the 85-A2 gold-quartz vein and its subsidiaries, 85-A2B, 85-A5, 85-A6, 85-A11A, 85-A12 and 85-A17 (collectively, the '85-A2'), located in the Target Area, the veins combine into continuous pinch and swell patterns of interconnected and anastomosing shear and tension veins, similar to other gold deposits in Archean Greenstone Belts.
For example, the lode gold settings of the Sigma-Lamaque, Dome and Canadian-Malartic gold deposits of the Abitibi Greenstone Belt ('lode gold setting') are linked to continuous and anastomosing structures with both shear and tension gold-quartz veins; they have 2 to 6km2 surface signatures; and either contain a disseminated gold or gold-quartz stockworks component or both.
It is unknown at this time if these lode gold settings are similar to the setting at the Ishkoday Target Area. If what is observed at the 85-A2 is eventually confirmed at other quartz veins and as the small-scale equivalent of a larger pattern, then LAURION's Ishkoday Project would have a major network of un-developed gold-quartz veins.
Further field validation is required to test these anastomosing mineralized NE-SW system and determine if most or a selective portion, and their orientation, of the hundreds of quartz veins identified by previous workers, and now by LAURION, carry gold, and if the gold mineralization is restricted to certain areas, whether high level intrusives, such as the porphyry N of the Quebec Sturgeon River Gold Mine, and/or polymetallic veins and/or structurally more deformed corridors, such as in quartz-sericite schists as identified in several outcrops of the Target Area.
The polymetallic veins of the CRK, Joe and Tehya showings appear to be localized in specific corridors and are commonly associated with felsic and mafic dykes, sericite-chlorite altered shears, magnetite bands and brecciation, with or without quartz veining, but with gold. Assay results from the 'CRK' Showing, located 1.25km NE of the past producing Quebec Sturgeon River Gold Mine, as previously reported by LAURION in 2015 (“Report on Grab Sampling, Channel sampling and Diamond drilling Programs, Ishkoday Property, prepared by N. Westoll, P. Geo., LAURION Mineral Exploration Inc., dated June 10, 2015”) yielded typical assay results of 8m width of 1.08 g/t gold, 4.90 g/t silver, 1.11% zinc and 0.08% copper, including 5m width of 1.68 g/t gold, 7.00 g/t silver, 1.27% zinc and 0.10% copper. Some 6 polymetallic-sulphide veins were previously identified, all of various metric lengths and widths believed to be centered on 'volcanic vents', associated with mafic and felsic dykes; lenses of silicification and quartz veining; quartz-sericite-chlorite-sulphide schists; granodiorite-diorite porphyries, rhyolite and rhyodacite (brecciated) flows and tuffs; secondary brecciation; chlorite alteration as veins; and sphalerite, chalcopyrite, galena, magnetite, gold and silver.