Ms. Mariana Bermudez reports
SOUTHERN CROSS GOLD APPOINTS JOSEPH SEPPELT AS HEAD OF TECHNOLOGY & PROCESSING
Southern Cross Gold Consolidated Ltd. has appointed Joseph (Joe) Seppelt as the company's head of technology and processing, effective immediately. Mr. Seppelt is an accomplished mineral processing engineer and leader with extensive experience commissioning and operating some of Australia's most technically demanding concentrators. His appointment marks a significant step in advancing the processing and smelting strategy for the Sunday Creek gold-antimony project.
As head of technology and processing and a senior member of Southern Cross's executive leadership team, Mr. Seppelt will lead the company's metallurgical testwork programs, processing flowsheet development, and smelting and refining strategy. He will oversee all technical and processing functions across the Sunday Creek project, reporting to the president and chief executive officer.
Mr. Seppelt brings nearly two decades of progressive leadership in mineral processing, with a career spanning greenfield commissioning through to large-scale operational optimization at BHP Carrapateena, Newcrest's Cadia Valley operations, Hillgrove Resources' Kanmantoo copper and BHP Olympic Dam. He holds a bachelor of engineering (chemical, honours) from the University of Adelaide and is an accredited Six Sigma Black Belt, having undertaken study tours in Japan in lean manufacturing and theory of constraints.
Most recently, Mr. Seppelt served as acting general manager at BHP Carrapateena, holding full-site accountability for surface and underground operations during a critical phase of expansion. As processing manager at Carrapateena from 2018 to 2025, he led the successful commissioning and ramp-up of the concentrator to nameplate capacity, and delivered the plant expansion from four Mtpa (million tonnes per annum) to seven Mtpa -- a multiyear program involving new regrind mills, cleaner circuit redesign, tailings dam capacity extension and installation of the HydroFloat coarse particle recovery circuit. He also led the 12 Mtpa surface expansion study. His tenure also included a safety transformation that reduced the site's total recordable injury frequency rate by over half within six months.
Prior to Carrapateena, Mr. Seppelt served as ore treatment manager at Newcrest's Cadia Valley operations, managing a $200-million annual operating budget across multiple concentrators and delivering a series of high-value debottlenecking and expansion projects. His work at Cadia included the justification and delivery of the first base metal sulphide HydroFloat installation for coarse copper and gold recovery, a major crushing circuit upgrade to debottleneck the ridgeway concentrator, multiple new Vertimill and Jameson cell flotation circuit expansions, and the development of a prefeasibility study for the Cadia molybdenum plant. He also collaborated with the Newcrest marketing team to support long-term customer arrangements with key Japanese smelting groups -- experience directly relevant to Sunday Creek's strategic engagement with Japanese processing partners.
Mr. Seppelt began his career at BHP Olympic Dam, progressing through production, metallurgy and superintendent roles over a six-year period. He is a prolific contributor to peer-reviewed technical literature, with eleven published papers across AusIMM mill operators, flotation and Metplant conferences, covering topics including grinding circuit design, Jameson cell optimization, coarse particle flotation and HPGR energy efficiency.
Michael Hudson, president and chief executive officer, commented: "On behalf of the board of directors, I am delighted to welcome Joe Seppelt as head of technology and processing at Southern Cross Gold Consolidated. This is an outstanding appointment for the company as we advance Sunday Creek's gold and antimony processing strategy toward production.
"Joe's appointment is strategically significant as we advance Sunday Creek's processing and smelting strategy. His hands-on experience commissioning and operating some of Australia's most technically complex concentrators -- including delivering a greenfield ramp-up at Carrapateena and executing a multistage capacity expansion from four to seven Mtpa -- is exactly the calibre of processing leadership that Sunday Creek demands.
"Sunday Creek presents a dual-product processing flowsheet -- high-grade gold and strategic antimony -- that requires best-in-class technical leadership. We are developing our gravity and flotation testwork program and evaluating a range of midstream processing pathways. Joe's record at Carrapateena and Cadia demonstrates an exceptional ability to navigate exactly these kinds of complex, multistream metallurgical optimization problems.
"Joe's appointment underscores the calibre of talent our project attracts. As we scale our technical team to match the ambitions of Sunday Creek, his Six Sigma credentials, people leadership and culture-building track record will be invaluable. This appointment, alongside Ryan Austerberry as COO, gives Southern Cross Gold an exceptional operational and technical executive team capable of executing Sunday Creek's development to world-class standards."
About Southern Cross Gold Consolidated Ltd.
Southern Cross Gold Consolidated is defining a leading gold-antimony project at the Sunday Creek gold-antimony project, located 60 kilometres north of Melbourne. Sunday Creek is a significant gold and antimony drill discovery in a Tier 1 location, with high-grade drill results including 81 composite intersections exceeding 100 grams per tonne Au (gold) from 114.8 km of drilling. The mineralization follows a Golden Ladder structure over 12 km of strike length, with structures tested from surface to 1,100 m depth.
Sunday Creek's strategic value is enhanced by its dual-metal profile. The company has a critical mineral the Western world needs. This has gained increased significance following China's export restrictions on antimony, a critical metal for defence and semiconductor applications. Southern Cross's inclusion in the United States Defense Industrial Base Consortium (DIBC) and Australia's AUKUS-related legislative changes position it as a potential key Western antimony supplier.
Technical fundamentals further strengthen the investment case, with preliminary metallurgical work showing non-refractory mineralization suitable for conventional processing and gold recoveries of 93 per cent to 98 per cent through gravity and flotation.
With a strong cash position, 1,392 hectares of strategic freehold land ownership, and a large 200 km drill program planned through Q1 2027, Southern Cross is well positioned to advance this globally significant gold-antimony discovery in a Tier 1 jurisdiction, delivering milestone by milestone.
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