Company: FMST
Filing Date: 2025-06-20
Form Type: 20-F
Source: 0001171843-25-004004
Chunk: 65

Company: Foremost Clean Energy Ltd.
Filing Date: 2025-06-20
Form: 20-F
Item: Item 4
Chunk 65
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stone, mudstone and quartzo-feldspathic gneiss and migmatite (the “ Missi Group”). These lithologies are flanked to the south by Missi Group calc alkaline and tholeiitic basalt and rhyolite to dacite ash flow tuff and flows and to the east and west more Missi Group sedimentary rocks. The ocean floor mafic volcanic rocks adjacent to the dykes consist of a fine- to medium-grained strongly foliated dark green lithology. These andesitic to basaltic lithologies are locally interbedded with volcaniclastic sedimentary rocks and all are intruded by a quartz-phyric granite intrusion. The flows are generally fine- to medium-grained, massive with a 50°-70° lineation and strikes of N10°-30° E and steep northwest dips. Localized quartz veins, quartz laminae and associated iron carbonate veinlets are also present in outcrop adjacent to lineaments interpreted to represent faults. Minor arsenopyrite was noted in the quartz veins and laminae. These rocks are locally rusty-weathered and crosscut by veinlets of iron carbonate and quartz. Minor arsenopyrite and pyrite was observed in the quartz veins and laminae.

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Figure 19 - General Geology of the Wekusko Lake Pegmatite Field Region. with Zoro Claims for Context

The pegmatite dykes generally strike northwest to north-northwest with steep dips and crosscut the regional foliation at a low angle. The dykes tend to be concentric in internal structure and the grain size of the constituent minerals (potassium feldspar, quartz, spodumene and black tourmaline) coarsens towards the center of the dykes. This pattern may be locally interrupted by patches of saccharoidal albite, large muscovite aggregates and coarse albite stringers with garnet and beryl. Spodumene is concentrated in the cores of the dykes. Some of the dykes have been split into sub-parallel veins by post-emplacement tectonic activity.

Dyke 1 pegmatite is the largest and best studied dyke on the Zoro Property. It is a north-south trending, near vertical body that extends for at least 280m in length and a maximum known thickness of approximately 35m. An apparent lack of alteration in the country rock is commonly described in the historical drill logs with only a local description