Resource Estimate
Thunder Gold Files NI 43-101 Technical Report for the Tower Mountain Property Mineral Resource Estimate
Tower Mountain MRE filing reinforces a large, scalable gold system with open-pit development potential near Thunder Bay

Executive Summary
- On 2026-03-10 Thunder Gold Corp. filed a NI 43-101 Technical Report supporting the Mineral Resource Estimate (MRE) for its 100%-owned Tower Mountain Gold Property, prepared by Micon International Limited. The report was prepared in accordance with NI 43-101 and CIM definitions, and is available on Thunder Gold’s website and SEDAR+.
- The March filing follows the material January 26, 2026 news release announcing a significant MRE for Tower Mountain with Indicated resources of 34.5 Mt at 0.46 g/t Au (about 514,000 oz) and Inferred resources of 211.1 Mt at 0.45 g/t Au (about 3.053 Moz), with a cut-off of 0.19 g/t Au and All-in Discovery Cost of CAD 3.95/oz. The MRE supported an open-pit development view at US$3,000/oz gold and 80% metallurgical recovery; the MRE was prepared by Micon and reflects a broad, district-scale system surrounding the Tower Mountain Intrusive Complex (TMIC).
- The release on 2026-01-26 (Material - Positive) outlined the MRE numbers and structural context, highlighting the potential for a large, pit-constrained resource and the Western TMIC contact as a focus for expansion.
- Earlier 2026-02-24 financing news (Routine - Positive) disclosed a private placement of up to CAD 2.5 million to fund ongoing exploration and definition drilling at Tower Mountain, with units consisting of flow-through shares and warrants; the offering was expected to close around March 15, 2026.
- Prior news through 2025 includes a 2025-12-22 closing of a CAD 2.15 million private placement (flow-through units), 2025-12-12 interim MD&A, and 2025-12-08 Phase Three drill results showing broad mineralization and expansion potential at Tower Mountain, reinforcing a positive momentum for 2026. The company had announced 2026 resource-definition drilling (Phase One and Phase Two) in late 2025 and ongoing planning for a combined MRE update and Scoping Study in Q4 2026.
- Overall, the March 10 NI 43-101 filing confirms the previously disclosed MRE and adds regulatory disclosure around the mineral resources, maintaining a positive trajectory but not introducing new, market-moving resource data beyond what was already communicated in January 2026.
Material Impact
- Fundamental implications:
- Regulatory confirmation: The NI 43-101 Technical Report filing formalizes the January MRE figures and supports disclosure standards. This strengthens investor confidence in the resource framework and the quality of the data, but does not by itself alter the headline resource numbers.
- Resource scale and development potential: The Tower Mountain resource base is substantial, with a clearly defined Indicated and a large Inferred component. While not a reserve, the scale and the potential for open-pit development under a low capex strategy (as highlighted in prior communications) support a favorable long-term view.
- Valuation drivers remain: open-pit potential, lower capex per ounce (as noted in earlier announcements), proximity to Thunder Bay infrastructure, and the potential to convert Inferred to Indicated with further drilling.
- Alignment with expectations:
- The NI 43-101 filing aligns with the prior material MRE (January 26 release) and the plan to advance resource definition and scoping studies in 2026. It is consistent with the announced path toward resource definition drilling, metallurgical testing, and eventual MRE updates.
- Key risks and hidden factors:
- Mineral Resources vs. Reserves: The MRE comprises Indicated and Inferred resources; no reserves are declared, so economics depend on future delineation, feasibility studies, and permitting.
- Commodity and price sensitivity: The MRE inputs used assumptions (e.g., US$3,000/oz gold price in the MRE), which could affect future economic outcomes if metal prices shift materially.
- Capital needs: Ongoing exploration and development work require equity capital; Thunder Gold has been actively financing these activities via private placements, which introduces dilution risk and execution risk around timely financings.
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Company Overview
- Company: Thunder Gold Corp.
- Flagship project: Tower Mountain Gold Property
- Location: Ontario, Canada; 2,500-hectare property in the Shebandowan Greenstone Belt, roughly 40-50 km west of Thunder Bay, with strong access to infrastructure via the Trans-Canada Highway.
- Ownership: 100% owned by Thunder Gold.
- Project context: The TMIC hosts the primary exploration target. Historical drilling around the intrusive complex has outlined anomalous gold along the western contact, with additional exploration potential around the entire perimeter of the intrusion (75% still untested). The project benefits from proximity to infrastructure and a relatively low drilling cost per metre.
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Jul 28, 2026 · 07:31