Company: AUST
Filing Date: 2025-03-27
Form Type: 20-F
Source: 0001410578-25-000509
Chunk: 78

Company: Austin Gold Corp.
Filing Date: 2025-03-27
Form: 20-F
Item: Item 6
Chunk 78
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; Lynn Window - Carlin Mine; Bootstrap Window - Gold Strike Deposit; and Cortez Window - Cortez Hills. It is the lower plate carbonate rocks exposed in the windows that host significant “ Carlin-Type” mineralization in these districts.

The oldest structures on the property are thrust faults associated with emplacement of the Roberts Mountains allochthon during the mid-Paleozoic Antler Orogeny. Ordovician Vinini upper plate overlies the younger Devonian to Silurian lower plate assemblage lithologies. On a district scale the strata dip north on the north side of the intrusion, south on the south side, and moderately to steeply to the west on the west side.

High angle structures are numerous, and several large district-scale faults are present:

  North-south-trending fault along the west side of Lone Mountain. This fault places Tertiary volcanic rocks and Ordovician Vinini Formation in contact with lower plate rocks. The fault has a mod...  

  NE to ENE-trending fault through the northern, south-central, and southern parts of the property.  

  NNW-trending fault zone in the southwestern part of the property juxtaposes the Coal Canyon unit and the Nevada Group. Numerous NNW faults are found throughout the project.  

Alteration is widespread and includes:

  Jasperoid; occurring as both bedded-type (passive replacement) and structural-type emplacement. The two normally occur together to some extent, with structures providing a conduit for fluids th...  

  Clay alteration, manifested by bleaching, is noted along structures in fine grained clastic units of the Vinini Formation.  

  Decalcification.  

  Calcsilicate or hornfels developed primarily in the siltstone unit of the Roberts Mountains Formation within a few hundred meters of the Nannies Peak intrusion.  

Table of Contents

  Marble developed in relatively clean carbonate rocks, primarily interior to the Nannies Peak “crescent”. Marble is typically medium gray to rarely white, medium to rarely coarse-grained and ban...  

The most intense and potentially most economically significant alteration occurs as jasperoid. Skarn and gossan are also widespread. When viewed on a district scale the skarn-type alteration occurs close to the intrusive, typically with gold as well as silver and base metals in rocks and soils. The widespread jasperoid development is outboard from the intrusive and commonly is associated with gold and elements typical of Carlin-type sediment-hosted gold deposits (Sb, As,