Lingman Lake Gold Project

Signature's primary exploration focus has been on the growth of its Lingman Lake Gold discovery currently contained within a conceptual pit shell of 1,600m EW x 400m NS x 340m maximum depth area starting at surface and open in all directions as reported in the NI 43-101 technical report published July 31, 2025 produced by Signature's geologic consultant, Watts, Griffin, McOuat ("WGM").   In 2024, WGM updated Signature’s geologic model incorporating historic drilling completed in the 1980's which expanded the high-grade mineralization zones as well as identifying moderate grade mineralization (>2g/t and <5g/t) that had not been a focus of past efforts despite being less than 200 metres from surface.  This model was further updated with the analysis necessary for completion of the initial mineral resource.   With the completion of the initial resource the Company is now focused on further extension and infill drilling to continue advancing the resource as well as reviewing potential targets on the large regional package.

Geology

The property is situated in the Lingman Lake Greenstone belt consisting of a complexly folded assemblage, of mafic metavolcanics, felsic metavolcanics and metasedimentary rocks. The assemblage is in intrusive contact with marginal granitic rocks and internally intruded by various intrusive rocks.

High-grade gold mineralization historically modelled at the Lingman Lake mine occurs in multiple zones which are structurally controlled by sub-parallel shears. Within these zones, the most favorable host rocks are mafic volcanics that have been silicified and carbonatized and occur in proximity to feldspar ± quartz bodies that are up to 91-metres wide.

The recently updated geologic model has provided an improved understanding of the Lingman Lake property suggesting the gold discovery at Lingman Lake is more widespread than historically contemplated and modeled. Historic gold exploration and mining emphasis throughout Ontario and Lingman Lake was focused on small, high-grade, near-surface deposits. Modern gold exploration and geologic modelling exercises a much broader approach to discover and define more extensive gold mineralization. With the improved modeling, Signature is in a much better position to interpret past geophysical work.   The 3D IP and Mag survey indicates a high correlation between chargeability, resistivity and mineralization.  High chargeability and low resistivity indicate porosity or ability for fluid movement and are correlated with the mineralization as evidenced in the historic drilling.  There is a large anomalous area of low resistivity (purple area) that extends across the Lingman Lake strike continuing through to the depth of the IP/Mag survey of 500 m.   The graphic below shows a selection of several low resistivity sections across the conceptual pit shell.  As can be seen from the drill traces on the sections, all the drilling has been near surface and the deeper and wider anomalous area has been untested. 

Section 507780E demonstrates the large anomalous area representing the area of low resistivity.  The prior drilling results on this section demonstrate the high correlation between the mineralization and the low resistivity area.   The video provides an overview of the 3D Alpha IP and MAG survey and why we believe it is important in demonstrating the ability of this deposit to grow significantly at depth and continues along strike.   

Section 507780E Large Low Resistivity Anomaly Down Plunge from Existing Resource