VANCOUVER, BC — January 6, 2026 — Leads & Copy — GoldMining Inc. has announced additional assay results from the 2025 RC drilling program at its São Jorge Project in the Tapajós gold district, Pará State, Brazil. The company owns 100% of the project.
The exploration results support initial drilling results that identified exploration discoveries at four new gold prospects, including the William South prospect, which is located approximately 1.5 km north of the existing São Jorge deposit. The initial results were released on October 20, 2025.
Alastair Still, Chief Executive Officer of GoldMining, said that GoldMining is encouraged by the additional positive drill results from the 2025 RC drilling at the William South prospect.
Still noted that the geology and geophysical signature at William South resembles the São Jorge gold deposit based on exploration to date. He added that the work has been encouraging of the potential for this area, highlighting that significant additional systematic exploration is required, especially over the core of the IP anomaly which has not yet been tested by drilling.
Still also said that the company continues to explore additional targets across the broad 12 km x 7 km geochemical footprint overlying the São Jorge property-scale mineral system, where it has additional exploration results pending.
The reverse circulation drilling results are a continuation of the William South drilling program, a high priority part of the broader 2025 São Jorge Project exploration program that the Company designed to test new targets outside of the known areas of mineralization.
Highlights of the drilling results include:
- 12 metres at 2.38 grams per tonne gold from 13 m depth, including 1 m at 22 g/t Au (SJRC-048-25)
- 4 m at 1.11 g/t Au from 46 m depth (SJRC-049-25)
- 1 m at 1.23 g/t Au from 16 m depth (SJRC-047-25)
Preliminary processing of Induced Polarisation data indicates drilling completed at William South to date has only tested the southern flank of a broad chargeability anomaly, which is similar in scale and intensity to the known IP signature of the São Jorge Deposit.
Drilling over the highest chargeability core of the William South IP anomaly is planned in 2026.
A total of 9,533 metres of drilling was safely and successfully completed on-budget during 2025.
Exploration results received to date support the broader potential for discovery and delineation of new zones of mineralization across the 46,000 hectare São Jorge Project.
The São Jorge Gold Project is located in the Tapajós gold district in the south-central portion of the Amazon Craton. The São Jorge gold deposit is a granite-hosted, intrusion-related gold deposit which is a similar deposit style to the Tocantinzinho gold mine located approximately 80 km northwest of São Jorge.
Exploration activities at the Project carried out by the Company over the past two years have successfully delineated several new exploration targets comprising gold ± copper ± molybdenum ± silver soil geochemical anomalies, which cumulatively outlines a large mineral system.
The São Jorge mineral system is defined by a comprehensive exploration data set which the Company has developed over previous campaigns. Surrounding the previously delineated São Jorge deposit, which has a defined 1.4 km strike length, the broader mineral system comprises a zone of contiguous surface geochemical anomalies over an area of 12 km x 7 km, which the Company interprets to be the surface expression of a broad intrusive related gold system.
The 2025 São Jorge exploration program successfully and safely completed a total of 9,533 m of drilling, which exceeded the total planned meterage of 9,000 m while remaining on–budget. The Project benefitted from the introduction of RC drilling which is cheaper and more rapid than diamond core, while providing greater depth penetration and assay reliability than auger drilling. The Program comprised 3,862 m diamond core, 3,528 m RC and 2,143 m auger drilling.
Of the 84 RC holes drilled to date across the Project for a total of 3,528 metres, assays have been returned for 78 holes, with the remaining 18 holes pending assays. To date, four target areas have returned >1 g/t Au intercepts from RC drilling: William South, William North, Ivonette and Dragon West.
Previously announced initial intercepts at the William South prospect included 4 m at 1.78 g/t Au from 12 m depth.
New assay results are presented herein for additional drilling at the William South Prospect, which is located 1.5 km north of the Deposit. The full drilling program at William South comprised 20 RC holes drilled on three fences to test beneath a broad zone of elevated gold-in-soil and auger drilling geochemistry. The western–most drill fence returned the best assay results from weathered monzogranite containing disseminated pyrite mineralization. The strongest mineralized intercept to date, comprising 12 m at 2.38 g/t Au (including 1 m at 22.08 g/t Au), occurs adjacent to a contact between monzogranite and syenogranite intrusive phases. A similar intrusive contact localizes strain, hydrothermal alteration and gold mineralization at the São Jorge deposit. Mineralization remains open along strike and to depth.
Preliminary processing of the recently completed 40 line km of IP surveying indicates that a broad east-west oriented high tenor chargeability anomaly, with coincident high resistivity, occurs at the William South target. Overall, the William South geophysical signature is similar in nature, scale and intensity to the São Jorge deposit. Drilling completed to date primarily targeted the highest tenor gold-in-soil geochemical anomaly, which occurs south of the core geophysical anomaly. Future drilling will extend northwards to test the chargeability / resistivity high.
Further RC drilling was subsequently completed at the Ivonette and Dragon West targets, to follow up on previously returned +1 g/t Au drill intercepts, with the objective to expand the mineralization intersected to date and potentially define new mineral resources. Assays are pending. Also, additional results from other components of the Program, including diamond core drilling beneath the São Jorge deposit, expansion of the IP survey grid, and a garimpo (artisanal mine) mapping and sampling program, will be reported as results are available.
Paulo Pereira, P. Geo., Country Manager, Brazil of GoldMining, has supervised the preparation of, verified and approved all scientific and technical information herein this news release. Mr. Pereira is also a qualified person as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects.
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Source: GoldMining Inc.
