Metallurgical Testwork
Search documents
Lake Victoria Gold Confirms up to Approximately 97% Gold Recovery and Free-Milling Metallurgy at the Imwelo Gold Project
TMX Newsfile· 2026-03-18 07:01
Core Viewpoint - Lake Victoria Gold Ltd. has announced positive metallurgical test results from the Imwelo Gold Project, indicating high gold recoveries and supporting the project's advancement towards near-term production in Tanzania's Lake Victoria Goldfield [2][19]. Metallurgical Test Results - The testwork confirms that mineralization at Imwelo is largely free-milling, with gold recoveries of approximately 96-97% using conventional gravity concentration and cyanide leaching [2][11]. - The results indicate that about 84% of gold is directly cyanide-leachable, confirming the deposit's non-refractory nature [15][12]. - A strong gravity recoverable gold component of approximately 42-47% was confirmed across multiple test programs [11][12]. Project Development Implications - The metallurgical results significantly de-risk the development pathway for the Imwelo Project, supporting robust project economics and relatively low processing risk [5][8]. - The results align closely with earlier metallurgical programs conducted in 2013, 2014, and 2017, providing a strong technical foundation for final plant design [7][19]. - The project is positioned as a low-risk, near-term gold production opportunity in one of Africa's most prolific gold districts [9][19]. Processing Characteristics - The results support a conventional gravity and carbon-in-leach (CIL) processing flowsheet, which is widely used in the region and expected to provide robust gold recoveries [17][12]. - The Bond Work Index testing returned a value of approximately 22.9 kWh/t, indicating moderate grinding energy requirements typical for deposits in the Lake Victoria Goldfield [18]. Management Commentary - The President & CEO of Lake Victoria Gold emphasized that these metallurgical results represent a significant milestone in advancing Imwelo toward production, confirming the strong gravity recoverable gold component and excellent cyanide recoveries [6][19].
Newcore Gold Commissions Pre-Feasibility Study for its Enchi Gold Project, Ghana
Globenewswire· 2026-02-05 11:30
Core Insights - Newcore Gold Ltd. has commissioned a Pre-Feasibility Study (PFS) for its Enchi Gold Project in Ghana, targeting completion by the end of H1 2026 [1][4] - The PFS will build on the 2024 Preliminary Economic Assessment (PEA) and will include extensive fieldwork and testwork conducted during 2024 and 2025 [2][3] PFS Details - Lycopodium Minerals Canada Limited has been appointed as the lead consultant for the PFS, ensuring continuity from the previous PEA [4] - The PFS will incorporate approximately 30,000 metres of additional drilling, metallurgical testwork, hydrogeological testing, geotechnical work, and environmental studies [2][4] Metallurgical Testwork - Recent metallurgical testwork has shown recoveries of 89.4% to 97.7% using a standard milling and carbon-in-leach (CIL) processing flowsheet, compared to previous assumptions of 75% to 85% for heap leach processing [2][5] - The decision to adopt the milling and CIL method is based on maximizing economic value and minimizing processing risk [8] Fieldwork and Studies - Additional fieldwork for the PFS includes geotechnical, hydrogeological, environmental, and social baseline studies [9] - Geotechnical studies involved diamond drill holes to assess subsurface conditions for construction foundations [10] - Hydrogeological studies included groundwater recharge measurements and the installation of weather stations for continuous monitoring [11] - Environmental and social baseline studies were conducted to meet national and international standards [12] Current Drill Program - A 45,000-metre drill program is underway at Enchi, focusing on near-surface oxide and shallow fresh mineralization, with the goal of resource growth [14] - The first phase of the drill program aimed at resource conversion to improve confidence in the existing Mineral Resource Estimate [14] Company Overview - Newcore Gold is advancing the Enchi Gold Project, which is located in Ghana, a leading gold-producing country in Africa [18] - The company emphasizes best practice standards in exploration, sampling, and drilling activities, ensuring quality assurance and control [15]
FireFly announces major high-grade copper and gold exploration breakthrough at Green Bay
Globenewswire· 2025-10-26 22:47
Core Insights - The Green Bay Copper-Gold Project in Canada is revealing an extremely high-grade core of copper and gold mineralization over a strike length of at least 800 meters, which remains open for further exploration [2][5][4] - Recent drilling results have shown significant intersections, including 43.6 meters at 7.6% copper equivalent (CuEq) and 15 meters at 16% CuEq, indicating a rich mineralized core that will impact the upcoming Mineral Resource Estimate [2][7][33] - The current Mineral Resource Estimate for Green Bay totals 24.4 million tons at 1.9% for 460,000 tons CuEq of Measured & Indicated Resources and 34.5 million tons at 2.0% for 690,000 tons CuEq of Inferred Resources [11][12] Drilling Results - Recent drilling has confirmed the presence of high-grade mineralization, with notable intersections such as 43.6 meters at 7.6% CuEq in hole MUG25-214, which includes an upper VMS zone grading 14.9 meters at 16.0% CuEq [2][33] - Additional significant intersections include 49.0 meters at 6.1% CuEq in hole MUG25-202 and 86.3 meters at 3.7% CuEq in hole MUG24-079, showcasing the potential for large-scale mining [2][6][11] - Infill drilling has also returned exceptional results, such as 4.1 meters at 17.4% CuEq and 16.0 meters at 13.5% CuEq, further confirming the high-grade nature of the mineralization [8][39] Exploration and Resource Conversion - Eight diamond rigs are currently operational, focusing on upgrading the existing Mineral Resource, extending known mineralization, and exploring new regional discoveries [2][19] - Regional exploration is actively underway, with drill rigs testing conductive geophysical anomalies in the central Green Bay leases, indicating ongoing efforts to expand the resource base [3][14] - The company is well-funded to accelerate its growth campaign and engineering studies following a recent equity raising [15]
Cartier Starts Metallurgical Testwork Program at Cadillac
Globenewswire· 2025-09-30 12:00
Core Viewpoint - Cartier Resources Inc. has initiated a comprehensive metallurgical sampling and testwork program for its Cadillac Project, aimed at optimizing processing methods and enhancing project economics [1][2]. Group 1: Program Objectives - The metallurgical program is a critical milestone for de-risking the Cadillac Project, focusing on understanding mineralized material responses to processing methods to define an efficient and cost-effective flowsheet [2]. - The program aims to reduce capital and operating costs while improving the environmental footprint, ultimately enhancing shareholder value [2]. - The initiative follows the launch of baseline environmental studies and aims to generate updated, high-quality data reflecting current standards [3]. Group 2: Historical Context - Historical production from the Chimo mine processed approximately 2.4 million tonnes of mineralized material from 1966 to 1997, with an average recovery rate of 90.6% for contained gold [4]. - The first two operators achieved higher extraction rates of around 94%, while the last operator, Cambior, saw a drop to 89% [4]. Group 3: Methodology of Testwork - The testwork will utilize NQ-size half-drill core intervals to represent the mineralization and average head grade, generating six composites totaling 300 kg from three deposits [6]. - Composites will undergo cyanidation tests at different grind sizes, followed by gravimetric concentration separation and cyanide destruction tests [7]. Group 4: Expected Outcomes - The program aims to define expected gold recovery rates and improve upon historical results from the Chimo deposit, while establishing recovery data for the East Chimo and West Nordeau deposits [9]. - It will support the development of an integrated process flowsheet and provide critical data for future trade-off studies [9]. Group 5: Company Overview - Cartier Resources Inc. is focused on gold exploration and development in Quebec, with a strategy to unlock the potential of its Cadillac Project, which covers 14,000 hectares along the Cadillac Fault [12][14]. - The Cadillac Project integrates the historic Chimo Mine and East Cadillac projects, positioning the company for rapid advancement and value creation [12].