Diatreme Resources Limited · ASX:DRX
Diatreme Resources — Noosa Mining Investor Conference 2025
26 slides from Diatreme Resources's conference presentation, Nov 14, 2025
Slide 1: Developer of high purity low iron silica
For personal use only Developer of high purity “low iron” silica – a critical mineral in global demand. Neil McIntyre, CEO, Diatreme Resources Noosa Mining Investor Conference 14 November 2025
Slide 2: Important Information
Important w Information For personal use only Resource Estimates and Production Targets ASX Announcements The Resource Estimates and Production Targets reported by Diatreme Resource Limited’s (DRX or the This presentation should also be read in conjunction with the DRX Annual Report for 2024 and the
Slide 3: Developer of world class silica sands projects in FNQ
Developer of world class silica sands projects in FNQ For personal use only Our vision is to be Australia’s pre-eminent listed producer of high purity, “low iron” silica sands used in growing global solar PV & specialty glass markets. 1 2 3 4 One of the world’s purest Potential delivery of three Glo
Slide 4: Corporate snapshot
Corporate snapshot For personal use only Share price Market capitalisation Shares on issue Cash Debt facility* Options (unsecured) A$0.020 A$100M 5,008M A$10.7M A$1.0M 70M 10.0m – Exp 27/5/26 @ $0.025 7 November 2025 30 September 2025 * Repayment 30 May 2026 (includes corporate and silica joint 10.0
Slide 5: Sibelco
Sibelco One of the world’s leading providers of industrial minerals For personal use only World class silica processing and technical knowledge, marketing and development expertise ▪ Leading supplier of silica to the Asian market for specialty glass ▪ Global leader in supply of cristobalite (refined
Slide 6: High purity, low iron silica sands projects
High purity, low iron silica sands projects For personal use only Developing in partnership with global material solutions leader Sibelco ▪ Long life, sustainable operations with excellent logistics ▪ Diatreme exploration acreage (630 sq km) adjoins the world’s largest high purity silica sand mine a
Slide 7: Silica sand projects advancing towards production
Silica sand projects advancing towards production For personal use only 2024 PFS Underway FID Target 2H 2026 Metallica Metals Limited NSP environmental Mitsui & Co. DRX awarded Major NSP Si2 MRE Upgrade PFS fully funded with takeover completed studies progress offtake MOU Dec 24 Project Status by Fe
Slide 8: Northern Silica Project
Northern Silica Project Positive Scoping Study strengthens development Plans. Pre-Feasibility Study underway For personal use only TARGET Production of 121Mt of high purity silica sand over 25 years Target production CAPEX (Stage 1) Annual average sales revenue Annual operating costs (Av LOM) 3Mtpa
Slide 9: Northern Silica Project
Northern Silica Project For personal use only ▪ Production of 3Mtpa; transhipping via barge to ocean- going vessel (OGV) within Port of Cape Flattery using existing berthing “pocket” ▪ Potential Phase 2: Production of 5Mtpa; direct loading from jetty to OGV docked at wharf subject to PFS optimisatio
Slide 10: Northern Silica Project
Northern Silica Project For personal use only ▪ Bulk metallurgical testwork confirms low-iron, high purity silica sand suitable for solar PV industry ▪ High product yields (85.6%) with low impurities (sub 100 ppm Fe2O3) ▪ Testwork validates process scalability to bulk production ▪ Additional testwor
Slide 11: Northern Silica Project Operations Overview
Northern Silica Project For personal use only OPERATIONS OVERVIEW High purity silica sand in global demand
Slide 12: Mineral Resource Estimate has risen by 513% since 2021
Mineral Resource Estimate has risen by 513% since 2021 68.7% Measured Si2 = Long LOM > 25 years For personal use only 2025 Measured, Indicated & Cape Silica Project Inferred Mineral Resource 61.5Mt 501Mt >99.33 (SiO2%) Northern Silica Project Galalar Project 272.5Mt 75.46Mt >99.33 (SiO2%) >99.18 (Si
Slide 13: Northern Silica Project – Further Exploration Upsides
Northern Silica Project – Further Exploration Upsides For personal use only ▪ Exploration Targets* defined for Casuarina East (80 – 190 Mt) and Casuarina West (35 – 85 Mt) for total of 115 – 275 Mt ▪ Targets represent unexplored extensions of Cape Flattery dune system, adjacent to CFSM ▪ Potential f
Slide 14: Workforce, Traditional Owners and Community
Workforce, w Traditional Owners and Community For personal use only ▪ Focus on local and regional employment and procurement ▪ NSP will contribute to an annual increase in real household consumption by $17 million in Cape York and $35 million in the rest of Qld during a typical operational year ▪ Pr
Slide 15: Why Silica
WhySilica Why silica High-purity silica is vital for the manufacture of solar panels – crucial to the energy transition For personal use only 70% of a solar panel is comprised of 70% high- purity silica glass made from high purity, low iron silica. ▪ High-grade low iron silica sand is an essential r
Slide 16: SiO2 Application Map – Purity the Key
SiO2 Application Map – Purity the Key For personal use only Silica Sand Quartz 450ppmm 250ppm 110ppm 50ppm 45ppm 10ppm Foundry Quartz Slabs Quartz Micro powder Quartz Crucible Middle Layer Quartz Crucible Inner Layer Construction Total Impurity<1000ppm Total Impurity<1000ppm Quartz Tube/Lab/Medical
Slide 17: Silica surge
Silica surge US$32B global market by 2028 For personal use only IMARC predicts global silica sand market will grow from US$25.4B in 2024 to US$38.3B in 2033, with CAGR of 4.7%. ▪ ” Investment in solar, both utility-scale and rooftop, is expected to reach $450 billion in 2025, making it the single la
Slide 18: Program 2025-2026 – Deliver Major Milestones
Program 2025-2026 – Deliver Major Milestones For personal use only 2H - 2025 1H - 2026 2H - 2026 Lodgement of EIS Respond to submissions EPBC Act approval, for adequacy review Submit final EIS Mining Leases Draft EIS notification period – - obtain EIS decision from OCG and lodge all other approvals
Slide 19: Experienced leadership
Experienced leadership Our team has extensive experience in the government, mining and resources sector For personal use only Wayne Swan Kara Keys Neil McIntyre Michael Cheng Brian Flannery Tom Cutbush Chairman Non-Exec MBE Chapman (William) Wang Non-Exec Non-Exec Director/ CEO Non-Exec Non-Exec Dir
Slide 20: Clermont Gold Project
Silica surge Clermont Gold Project For personal use only ▪ Agreement to sell Clermont Gold Project to Moonlight Resources Limited as part of Moonlight’s proposed ASX IPO ▪ Moonlight to issue DRX with ordinary shares and performance rights valued at $3.25M together with $250,000 in cash; DRX sharehol
Slide 21: Appendices
For personal use only APPENDICES
Slide 22: Mineral Resources Statement
Mineral Resources Statement Global Resources: Northern Silica, Galalar Silica, Western Resource Area, Cape Flattery Silica For personal use only Mineral Resource Category Silica sand (Mt) SiO2 % Fe2O3 % TiO2 % Al2O3 % Measured 43.12 99.21 0.09 0.11 0.13 Indicated 23.12 99.16 0.09 0.13 0.10 Galalar I
Slide 23: Mineral Resources Statement – Cyclone Zircon Project
Mineral Resources Statement Cyclone Zircon Project: Western Australia For personal use only Category HM cut-off Material Mt HM HM Slime OS Head Grade Zircon % % Mt % % Kt Zircon % Rutile % Leuco % HiTi % Alt Ilm % Si TiOx Measured 2.0 69 3.7 2.58 3.6 3.8 1.06 0.11 0.24 0.88 0.45 0.82 735 Measured 1.
Slide 24: Ore Reserves Statement
Ore Reserves Statement For personal use only Global Ore Reserves: Galalar Silica, Cape Flattery Silica Waste Mineral Resource Category Silica sand Mt SiO2 % Fe2O3 % TiO2 % LOI % Al2O3 % (Mt) Galalar Probable 32.5 0.04 99.2 0.08 0.11 0.16 0.13 CFS East Probable 47 4.0 99.11 0.09 0.14 0.24 0.15 Combin
Slide 25: Competent person's statement
Competent person’s statement For personal use only Statement in accordance with the Australasian code for reporting of exploration results, The information in this announcement that relates to Mineral Resources at the Western mineral resources and ore reserves (the JORC code) Resource Area deposit i
Slide 26: Competent person's statement
Competent person’s statement For personal use only Statement in accordance with the Australasian code for reporting of exploration results, The information in this announcement that relates to Ore Reserves at the Cyclone deposit is mineral resources and ore reserves (the JORC code) extracted from th
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