As global mining capital increasingly targets quality copper-gold assets, large, shallow, and highly continuous porphyry deposits have become scarce commodities. Auro Metals Inc. (TSX-V: AURO; OTCPK: AURFF) exemplifies this trend. On September 15, the company announced another significant exploration milestone at its Santa Barbara copper-gold project, where Phase-One drilling delivered breakthrough results.
All three latest drill holes intersected mineralisation consistently, with the flagship hole DSB-68 setting a new project record by returning a continuous 905.22-metre intersection grading 0.60 g/t gold and 0.12% copper. Combined with multiple previously reported high-grade intersections, these results further validate the project's defining characteristics of a world-class porphyry system with thick, continuous, and open-ended mineralisation at depth, expanding the potential resource scale.
"Hole DSB-68 delivered the best intersection to date, with mineralisation still present at the final depth of 1,282 metres, confirming strong down-dip extension potential. Holes DSB-69 and DSB-70 respectively validated the openness of the down-dip mineralisation and the presence of high-grade zones at depth. These latest results continue to confirm the immense scale and excellent continuity of the Santa Barbara deposit," said Auro Metals CEO Victor Feng. Phase-One drilling has now been completed, totalling 22 holes for 11,047.35 metres. Assay results for 17 holes have been released, with the remaining five to be announced in due course.
The company also announced the successful conclusion of its Phase-One 10,000-metre program and the commencement of Phase-Two, a 20,000-metre deep-drilling campaign. With Phase-Two underway, the narrative around resource expansion, grade improvement, and reserve upgrades is expected to strengthen, positioning the company as a compelling copper-gold exploration play in South America and opening a clear window for valuation re-rating.
New and prior results converge to confirm a rare, high-quality resource endowment
All three latest holes were drilled in the southern sector of Santa Barbara, the core zone of the porphyry mineralisation system. Consistent with the design philosophy of earlier Phase-One holes, these holes aimed to test continuity between historical intersections, while also probing extension potential along strike and at depth. Assay results show hole DSB-68 returned 905.22 metres of continuous copper-gold mineralisation from 56.5 metres to 961.72 metres, averaging 0.60 g/t gold and 0.12% copper. The hole reached a final depth of 1,282 metres, making it the deepest and longest hole drilled at the project to date. Weak mineralisation was still present at the bottom of the hole, clearly confirming that the deposit remains completely open at depth, redrawing previous resource boundary assumptions and significantly enhancing the project's development value.
The other two holes also performed strongly, forming a multi-point validation picture. Hole DSB-70 returned a 262.5-metre continuous interval averaging 0.71 g/t gold, including a 100.45-metre high-grade section at depth grading 1.01 g/t gold. Hole DSB-69 returned two continuous mineralised intervals of 103.05 metres and 200.55 metres, including a 57.83-metre ultra-high-grade section grading 1.06 g/t gold. The clear delineation and consistent continuity between high-grade and lower-grade zones further underline the project's top-tier endowment.
More critically, this latest breakthrough is not an isolated event. It represents the continuation of sustained exploration success since the beginning of 2026, with multiple batches of drilling data forming a complete validation loop. In June, hole DSB-54 intersected a 705-metre long mineralised zone averaging 0.61 g/t gold and 0.1% copper, including a 235-metre high-grade core grading 1.00 g/t gold. In July, hole DSB-59 returned a 625-metre continuous intersection averaging 0.64 g/t gold and 0.1% copper. In August, hole DSB-61 delivered a 496.5-metre interval averaging 0.76 g/t gold and 0.12% copper, including a 212.5-metre high-grade section at 1.12 g/t gold. From 625 metres, to 705 metres, and now to this latest 905-metre intersection, the mineralised length continues to grow, with frequent high-grade enrichment.
In industry comparison, major global porphyry copper-gold deposits typically exhibit "large scale but lower grade" characteristics. The Santa Barbara project, by contrast, combines exceptional thickness, consistent continuity, and high-grade enrichment at depth, breaking the conventional trade-off and representing a truly scarce resource. This positions the project as a key catalyst for value re-rating.
Accelerated exploration programme advances both resource upgrade and reserve expansion
To date, the 2026 Phase-One drilling programme at Santa Barbara has officially concluded, with 22 holes completed for a total of 11,047.35 metres. Assay results for 17 holes have been disclosed, with data from the remaining five holes to be released progressively, providing ongoing catalysts for the market.
"Phase-One drilling has fully achieved its three core objectives: comprehensively validating historical exploration results, densifying the drill grid within the inferred resource area, and securing fresh core samples to support subsequent metallurgical test work," said Victor Feng. Phase-Two, a 20,000-metre drilling programme, has now been fully mobilised. With the addition of three new kilometre-capable drill rigs, the project's overall drilling depth capability and operational efficiency have been substantially enhanced.
Given the key observation that multiple deep holes from Phase-One remained within mineralisation at final depth, Phase-Two focuses on three core directions: targeting the deep extension of the orebody, infilling gaps within the known mineralised body, and testing new target areas identified through historical geophysics and surface sampling. This will represent the largest and deepest exploration campaign in the project's history, driving a step-change in resource growth.
With Phase-Two drilling now underway, Santa Barbara is expected to continue generating new thick, high-grade mineralised intervals, supporting ongoing resource upgrades and delivering further market upside.
Location and asset advantages position company for significant valuation re-rating
The Santa Barbara gold-copper project was acquired by Auro Metals (formerly Tincorp Metals Inc.) in May this year as a large-scale porphyry gold-copper asset, covering a 52-square-kilometre exploration concession. The project is located in the Zamora copper-gold belt in southeastern Ecuador, one of the world's premier gold-copper districts, hosting multiple large operating mines and advanced development projects with highly favourable geological conditions.
In terms of resource estimates, the NI 43-101 compliant Mineral Resource Estimate (MRE) released on April 9, 2026, reports, at a 25 USD/t NSR cut-off grade, total Indicated and Inferred resources of 235 million tonnes, containing 128 tonnes (4.11 million ounces) of gold at 0.54 g/t and 224,000 tonnes of copper at 0.10%. This equates to a gold-equivalent of 134 tonnes (4.3 million ounces) at 0.57 g/t. Preliminary metallurgical test work has also demonstrated the project's economic viability, with gold recovery of 85.5% and copper recovery of 19.6%, figures that compare favourably to similar porphyry deposits. This provides a solid foundation for cost control and profit generation in future development.
Looking at broader commodity fundamentals, the new-energy industry continues to underpin industrial copper demand, while gold's safe-haven and store-of-value characteristics remain firmly intact. A copper-gold co-product asset offers both growth optionality and anti-cyclical resilience, supporting a robust valuation base.
Throughout this exploration cycle, the project has repeatedly delivered ultra-long, continuous mineralised intersections that have progressively exceeded market expectations and reshaped value perception. The 905.22-metre intersection now firmly establishes the project's potential as an ultra-large porphyry deposit, reinforcing the valuation re-rating logic and leaving considerable room for upward revision.
Market pricing of Auro Metals is increasingly shifting from that of a high-uncertainty pure exploration play toward a growth-oriented mining company with a clear value-delivery pathway. With the upcoming release of assay results from the remaining five Phase-One holes, continued high-grade intersections from the 20,000-metre Phase-Two drilling campaign, metallurgical test outcomes, and a resource update, Auro Metals is poised to enter a new chapter of asset value re-rating.
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