Southern Cross Gold Links Christina and Golden Dyke Prospects with 481m Continuous Mineralization in Westernmost Drill Hole

Westernmost Step-Out Extends Christina Mineralization by 300 Metres Beyond Previous Drilling

Southern Cross Gold’s recent drilling campaign has significantly extended the western boundary of mineralization at Sunday Creek beyond all prior exploration. Three definition holes—SDDSC220, SDDSC232, and SDDSC235—were drilled from a new western pad approximately 300 metres west of any previously released drill collars. Each hole intersected mineralization, confirming the Christina prospect’s continuation into previously untested ground with shallow gold mineralization detected within 15 to 60 metres from surface.

This western step-out marks a vital expansion of Christina’s explored area. The shallow gold mineralization in this new western zone suggests potential near-surface ore bodies that may offer different mining and processing characteristics compared to deeper mineralized zones. The consistent mineralized intersections across all three holes confirm that the mineral system is extensive and continuous rather than localized.

SDDSC235 Confirms Christina Prospect Matches Golden Dyke Scale and Grade

The deepest and westernmost hole to date at Christina, SDDSC235, is regarded as one of the most significant drill holes at Sunday Creek. This 1,405.7-metre hole remained within prospective dyke and altered sediment for about 800 metres of its length. Most notably, from 282.1 metres depth, it intercepted 481 metres of mineralization grading 0.9 g/t gold uncut, linking Christina directly to the Golden Dyke corridor and extending into the Rising Sun area at 1,010 metres below surface.

The hole yielded seven assays above 50 g/t gold, including a peak assay of 496.0 g/t gold. Key highlights include a broad 8.3-metre intercept at 4.8 g/t gold equivalent from 708.7 metres within the Golden Dyke section, and a high-grade 0.8-metre interval at 141.0 g/t gold equivalent from 568.9 metres. These results definitively demonstrate that Christina hosts a mineralized system comparable in scale and grade to the established Golden Dyke and Rising Sun prospects, validating the company’s geological model.

High-Grade Gold Inventory Grows to 93 Composite Intersections Above 100 g/t

The latest drilling has substantially bolstered Southern Cross Gold’s high-grade gold inventory at Sunday Creek. Five new composite intersections exceeding 100 g/t gold have been added, increasing the total from 88 to 93. This growth highlights the consistency of high-grade mineralization across an expanding footprint and confirms Christina’s significant contribution to the overall resource.

Importantly, all new high-grade intersections at Christina lie outside the March 2025 exploration target, indicating that mineralization extends beyond previously defined boundaries. This suggests the Sunday Creek project’s resource potential may be considerably larger than earlier estimates, with the March 2025 target possibly conservative relative to the expanding mineralized footprint.

Shallow Antimony Grades Validate Critical Mineral Zonation at Christina

In addition to gold, the drilling program confirmed significant antimony grades in shallow sections of Christina, supporting the company’s model of critical mineral zonation. Hole SDDSC235 returned 39.5% antimony over 0.1 metre at 91.8 metres depth, while SDDSC220 yielded 12.4% antimony over 0.2 metres from 205.4 metres. These shallow antimony intersections extend the critical mineral endowment westward into new drilling areas.

The antimony results confirm Sunday Creek hosts a gold-antimony system exhibiting epizonal (shallow crustal) zonation, with higher antimony grades near surface and increasing gold grades at depth. The presence of economically significant gold and antimony grades enhances the project’s resource potential and may improve the economics of future mining through multi-metal recovery.

Five-Hole Program Combines Definition and Control Drilling for Structural Insights

The five-hole drilling program was designed to meet multiple objectives. Three holes—SDDSC220, SDDSC232, and SDDSC235—were drilled west to east to optimize vein intersection angles, targeting the upper Christina prospect from surface to depth. Two additional holes, SDDSC207 and SDDSC213, were drilled sub-perpendicular to the dyke trend as control holes to define the down-dip architecture of the mineralized system.

Control holes provided critical structural data by intersecting the mineralized system at different orientations, confirming its dip and extension at depth. This combined approach of definition and control drilling is a sophisticated exploration strategy appropriate for a project at an advanced delineation stage, enabling a comprehensive three-dimensional understanding of mineralization.

Ongoing Eleven-Rig Drilling Campaign Scheduled Through Q1 2027

Southern Cross Gold continues an aggressive exploration program at Sunday Creek, operating eleven rigs concurrently. The company is executing a 200,000-metre drilling campaign planned to run through Q1 2027, according to President and CEO Michael Hudson. At the announcement time, 68 drill holes were pending assay results, indicating a steady flow of data and forthcoming updates.

This large-scale, multi-year drilling effort underscores management’s confidence in Sunday Creek’s resource potential and commitment to rapid resource definition. Operating eleven rigs simultaneously requires significant operational coordination and capital but accelerates exploration progress and shortens decision timelines for project development.

Sunday Creek Gold-Antimony Project Overview and Corporate Structure

The Sunday Creek Gold-Antimony Project is located in Victoria, Australia, and is wholly owned by Southern Cross Gold. It represents a key focus within the company’s exploration portfolio. Southern Cross Gold is dual-listed on the Toronto Stock Exchange (TSX:SXGC) and the Australian Securities Exchange (ASX:SX2), with additional listings on the OTCQX (SXGCF) and Frankfurt (MV3.F) exchanges.

The company maintains operational coordination across multiple jurisdictions, with corporate offices in Vancouver, Canada, and Melbourne, Australia. This dual-continent presence facilitates investor relations across North American and Australian markets while providing close oversight of Australian exploration operations. The executive team is led by President and CEO Michael Hudson, with corporate development and secretary roles managed by Nicholas Mead in Melbourne and Mariana Bermudez in Vancouver.

Multiple Prospect Corridors Highlight Sunday Creek’s Expanding Resource Potential

While this update focuses on Christina, Sunday Creek comprises multiple mineralized corridors including Christina, Golden Dyke, and Rising Sun across a large property. The SDDSC235 hole intersected mineralization within all three corridors, demonstrating lateral and vertical continuity of the system. These prospects may represent segments of a larger continuous mineralized belt rather than isolated deposits.

The presence of multiple mineralized corridors with significant gold and antimony grades suggests Sunday Creek could host a substantial resource encompassing several zones. Each corridor may be developed independently or as part of a larger mining operation. Intersecting multiple corridors in a single hole also indicates potential for discovering additional zones as drilling extends into new areas.

March 2025 Exploration Target Versus Latest Drilling Results and Implications

Southern Cross Gold noted that all Christina intersections from the recent drilling lie outside the March 2025 exploration target. Exploration targets provide estimated ranges of tonnage and grade based on existing data to guide future work. New results beyond prior target boundaries indicate the mineralized system extends further than previously estimated.

This typically leads to revising exploration targets and resource estimates to reflect expanded mineralization. The westward expansion of consistent mineralization beyond the March 2025 target suggests updated targets will likely show a larger mineral endowment. Management will consider revising the exploration target after completing the current drilling program or once sufficient new data is available.

Geological Architecture and True Thickness Considerations

The company provided guidance on true thickness of mineralized intervals, estimating it to be approximately 40% to 90% of the sampled drill thickness across all holes. This range reflects variable drill hole angles intersecting steeply dipping veins. When drill holes intersect veins obliquely, apparent thickness exceeds true perpendicular thickness.

Accurate true thickness is essential for resource estimation since calculations require perpendicular thickness. The 40% to 90% range indicates some intersections are close to perpendicular, while others are more oblique, depending on drill azimuth and dip. This variation demonstrates the use of diverse drilling orientations to optimize mineralized corridor intersections at depth.