Azzuro Resources' 3D gravity inversion at Red Hill uncovers a continuous high-density body extending well below existing drill levels, highlighting new down-plunge and southwest targets for imminent drilling.
- 3D constrained gravity inversion integrates geological and drill data
- High-density anomaly extends 240m below current drilling
- New separate gravity anomaly identified 650m southwest
- Downhole electromagnetic surveys starting early August
- Drilling planned for second half of August 2026
Gravity Inversion Unveils Significant Depth Extension
Azzuro Resources (ASX:AZ9) has delivered a fresh perspective on its Red Hill Copper-Gold VMS Project in Mongolia, with a detailed 3D constrained gravity inversion revealing a single, coherent high-density body that extends significantly beyond the mineralisation currently drilled. This high-density anomaly, interpreted as the core of the massive sulphide system, plunges approximately 240 metres below the deepest high-grade intercept to date, itself already 110 metres beneath surface.
From Disconnected Blips to a Unified Target
Previous unconstrained gravity models showed a scatter of isolated density highs with no clear geological correlation. By incorporating geological mapping and drillhole data, Azzuro's constrained inversion has transformed these into a continuous, elongated mass that aligns closely with known mineralised zones, notably drillholes MU2601 and MU2501. This integration offers the company its first geophysical estimate of the down-plunge extent of the Red Hill massive sulphide system, providing a vital guidepost for upcoming drilling.
New Southwest Anomaly Emerges as Drill Priority
Beyond the main system, the inversion highlights a compelling, separate high-density body roughly 650 metres southwest of the current drilling footprint. Measuring about 190 metres in strike length and extending to 300 metres depth, this anomaly coincides with surface rock-chip copper assays reaching up to 9.35% Cu and strong alteration signatures. Crucially, this target lies just east and down-dip of drillhole MU2611, which did not intersect the anomaly, marking it as a fresh and high-priority drill target.
Electromagnetic Surveys and Drilling on the Horizon
To sharpen drill targeting, Azzuro is commencing downhole electromagnetic (DHEM) surveys on selected 2026 drillholes in early August, alongside resistivity measurements across the broader tenement. These geophysical tools aim to refine the understanding of subsurface conductivity anomalies associated with sulphide mineralisation. Drilling to test both the down-plunge extension of the main massive sulphide body and the new southwest anomaly is scheduled for the second half of August 2026.
Assay Delays and Quality Control
While the gravity inversion relies primarily on density data and geological constraints, assay results from Batch 4 of the 2026 drilling program have been delayed by approximately three weeks. A routine QA/QC review identified some results outside acceptable tolerances, prompting re-analysis by ALS Group Laboratory in Ulaanbaatar. This delay does not affect the current gravity inversion findings but investors should note the pending assay updates as they will provide critical grade data to complement the geophysical models.
Strategic Implications for Red Hill Exploration
These results mark a significant step in unlocking the full potential of the Red Hill project, which has already demonstrated promising high-grade copper-gold mineralisation over a 550-metre strike length. The gravity inversion's depth extension suggests that the system is open at depth and along strike, reinforcing the project's exploration upside. The identification of a new anomaly with strong surface geochemical support adds another dimension to Azzuro's drilling campaign, potentially broadening the scope of mineralisation beyond the known zones. The integration of geophysical data with drilling results will be critical in refining the exploration model as the company advances towards resource definition.
Bottom Line?
Azzuro’s gravity inversion offers a clearer, deeper picture of Red Hill’s mineral potential, setting the stage for a pivotal drilling campaign that could redefine the project’s scale.
Questions in the middle?
- Will the upcoming drilling confirm the down-plunge continuity suggested by the gravity inversion?
- How might the new southwest anomaly reshape the overall resource potential at Red Hill?
- What impact will the delayed assay results have on refining the geological model and targeting strategy?