Redstone Tollu Drill Delivers Deep Copper Hit, Big Upside

Redstone Resources (RDS.ASX) has just released insights from a deep diamond drill hole at Tollu, within WA's West Musgrave region. In this ASX small-cap analysis, James Whelan from smallcaps.com.au sits down with Redstone’s project director Greg Shurtleff to unpack why the Tollu results are noteworthy, what they reveal about the geology under Tollu, and what this could mean for future exploration across the Tollu Fault and surrounding gabbro intrusions. The key takeaway is that a single deep hole has intersected significant copper mineralisation far below the existing Tollu limits, with two strong copper zones recorded in a mafic rock (gabbro) environment and signs of alteration and cobalt mineralisation that could point to a larger, deeper magmatic system. The drill targeted beneath what was believed to be the deepest part of the Tollu copper deposit, in the hope of finding an extension or a signature of a bigger copper-nickel-cobalt system similar to Nebo Babel or Voices Bay. While the hole is off-target relative to Tollu’s known surface geometry, the mineralisation encountered at depth suggests the belt could host a much larger, deeper system and emphasises Tollu’s prospectivity when viewed in the broader regional context. Greg discusses the significance of hitting gabbro at depth, the structural information Diamond Core drilling can provide, and how the geochemical signals (including cobalt) align with a potential mafic-hosted sulphide system. The discussion also covers how Tollu’s copper might be sourced from deeper magmatic processes, and why that matters for planning future exploration across the Tollu Fault and adjacent magnetic anomalies. Two high-grade copper zones (>1% and >2% Cu) were found in the gabbro, with the deepest, highest-grade copper around 1,050 m down-hole (roughly 820 m below the surface). Importantly, the hole ended about 130 m south of the previously known Tollu mineralisation and 400 m deeper than the deepest Tollu copper previously discovered. The presence of alteration (chlorite) and cobalt in the gabbro provides additional geological context that engineers future testing for potential copper-nickel sulphides. What does this mean for Tollu? It opens the door to exploring for a deeper, larger copper system and evaluating the broader magmatic intrusion framework around Tollu. It also supports a strategic shift to consider other magnetic anomalies in the region as potential hosts for similar deposits, consistent with Redstone’s Nebo Babel/Voices Bay-style targets. Next steps include ongoing structural analysis of the hole to plan additional drilling, and leveraging government co-funding to support further diamond and RC drilling targeted at Tollu’s deeper extensions and nearby magnetic intrusions (up to $220k for another diamond hole and around $160–$180k for RC drilling). Timestamps: 0:00 Intro and overview 0:39 Interview setup with Greg Shurtleff 1:14 Tollu drill highlights and why it matters 3:14 Geology: Tollu, gabbro and magma 4:53 Drilling method and structural info 5:53 Why gabbro is significant 7:10 Off-target hit but high-grade copper 8:12 Copper zone depth and significance 10:29 What’s next for Tollu 13:53 Cobalt signal in gabbro 15:30 Plans for RC and diamond drilling; future exploration 16:06 Government co-fund grants update 17:06 Wrap up and takeaways If you’d like more updates on Redstone Resources and Tollu, hit subscribe for more ASX small-cap updates and share your thoughts on Tollu’s potential below. ⚠️ IMPORTANT DISCLAIMER: This content is for educational and entertainment purposes only and should not be considered financial advice. All investments carry risk, including the potential loss of principal. Past performance does not guarantee future results. Always conduct your own research and consider seeking advice from a qualified financial advisor before making investment decisions. The creator may hold positions in securities discussed. 📌 Articles: https://smallcaps.com.au/redstone-resources-thick-copper-mineralisation-diamond-drilling-tollu-chatsworth https://smallcaps.com.au/redstone-resources-copper-focused-explorer-poised-potential-re-rating https://smallcaps.com.au/galan-acquire-james-bay-lithium-projects-joint-venture-redstone-resources https://smallcaps.com.au/redstone-resources-pulls-up-95m-thick-copper-intersection-musgrave 🔎 More on this company: https://smallcaps.com.au/stocks/asx-rds/ ⸻ Small Caps is Australia’s #1 site for market news & information on ASX-listed small cap companies. 🌐 WEBSITE https://smallcaps.com.au/ 🎧 PODCAST https://smallcaps.com.au/podcast/ 📱 SOCIAL MEDIA Facebook: https://www.facebook.com/SmallCapsASX Twitter: https://twitter.com/SmallCapsASX LinkedIn: https://www.linkedin.com/company/small-caps/ 📬 NEWSLETTER https://smallcaps.com.au/subscribe/