#STOCKPILE AREA CALCULATOR UPDATE#

Under the supervision of ASCU’s growing owner-operator team, the step-up PFS is being led by Ausenco and a consultant team comprised of Samuel Engineering, AGP Mining Consultants, Stantec, MineFill Services, Clear Creek Associates and Call & Nicholas Inc. Rounding out the appointments made within the last 18 months include, Bernie Loyer as SVP Projects, Chris White as Chief Mine Geologist, Dan Johnson Projects Director, Greg Phillips, Process Superintendent, Victor Moraila, Chief Mine Engineer, Graeme Hendricks, Senior Mine Engineer and now Steve Dixon, Chief Metallurgist. Steve has held various project management and metallurgy roles at Goldcorp, Freeport-McMoRan, Quadra, Phelps Dodge Mining and others, with a special focus on the Americas. His area of expertise is in leaching, process design and cost reduction as it relates to managing technical studies and process development and operations. For the past 14 years, Steve has focused on consulting for mining, exploration and development companies and institutional investors for feasibility studies, project and process development and assistance to operations. He is based in Tucson, and joins with over 30 years of metallurgical management experience. in Metallurgical Engineering and B.S in Chemistry. ASCU’s most recent hire is Steve Dixon as Chief Metallurgist. The Company now has 19 employees, up from 17 at the end of 2022, with a key focus on strengthening the development and operations team onsite in Casa Grande, Arizona. He continued, “As the Project and Company continues to evolve, strengthening of the owner’s team sets us up well for future technical studies and any eventual decision to move into a construction and development phase.” Our drilling also continues, both infill and exploration, as we look towards upgrading resources again from the indicated to measured category.” Ongoing work programs include our advanced metallurgical programs, final engineering, mine planning and site characterizations as we progress towards our PFS. George Ogilvie, Arizona Sonoran CEO commented, “The Company has continued to deliver on its key objectives and will continue striving to outperform.

61-82% estimated extraction rates of the primary sulphide material after 75-150 days of leaching.

Nuton testwork continues to deliver positive results, providing optionality to scale the asset beyond the oxide and enriched base case

Improves planning flexibility for the pending PFS.

Increased land to 5,368 acres by optioning the MainSpring Property, extending south from Parks/Salyer

Amendments will be made to accommodate the larger operation, post-PFS.

Completed all major Cactus permits based on the 2021 PEA

DFS level metallurgical studies ongoing.

90% recovery rates for oxides in the Cactus deposits and the Stockpile Project.

Parks/Salyer enriched material shows comparable recovery rates to Cactus (76% and higher) with potentially shorter leach periods.2 years of positive metallurgical results now in hand for oxides and enriched material Infill to measured category drilling is ongoing for a DFS expected in H2 2024.Infill to indicated category drilling complete.Anticipating high conversion of the 2.9B lb 1.015% TCu Parks/Salyer mineral resource estimate into the indicated category from the inferred category Steve Dixon, Chief Metallurgist (July 2023).Bernie Loyer, SVP Projects and Christopher White, Chief Mine Geologist (June 2023).

#STOCKPILE AREA CALCULATOR UPDATE#

PFS scope includes the enriched and oxide material, or approximately 75% of the total mineral resources (based on the 2022 mineral resource update – Sept 28, 2022).Targeting step up from the Preliminary Economic Assessment’s (“PEA”) 28ktpa to 45-50ktpa and to a mine life well-beyond the 18 years previously outlined.On track and on budget to deliver a PFS in Q1 2024 He will be managing the metallurgical programs in preparation for the base case PFS and Definitive Feasibility Study (“DFS”). Furthermore, the owner-operator team continues to strengthen with the appointment of Mr.

All activities are focused on de-risking its high-quality asset in a tier one location, in preparation for the pending step-up Pre-Feasibility Study (“PFS”) expected in Q1 2024. (TSX:ASCU) (“ASCU” or the “Company”), an emerging US-based copper developer and near-term producer, today updates on exploration and development activities at the Cactus Mine Project, inclusive of the Parks/Salyer deposit. & TORONTO / / Business Wire / Arizona Sonoran Copper Company Inc.

Stockpile area calculator