| Company | Lion Copper and Gold Corp. |
| Date | 2022 |
| Region | Lyon County, Nevada, USA |
| Commodities | Copper |
Executive Summary
This NI 43-101 Technical Report presents an updated mineral resource estimate for the MacArthur Project, located in Lyon County, Nevada. The project is owned by Lion Copper and Gold Corp. and is situated in the Yerington Mining District. The MacArthur Project represents a copper mineralization system that has been explored since the 1970s, with previous mining activity conducted by Arimetco in the late 1990s. The current mineral resource is pit-shell constrained and differs from previous unconstrained estimates. Planned processing includes a ROM heap leach facility with solvent extraction and electrowinning (SX/EW) to produce cathode copper. Additional metallurgical testwork is underway to improve understanding of copper recovery and acid consumption. Environmental baseline studies and permitting are ongoing, with no operating permits yet acquired. The project has potential for expansion through additional drilling and innovative recovery processes.
Key Highlights
- Status: Exploration/Development
- Mine Type: Open pit (planned)
- Processing: ROM heap leach with SX/EW
- Commodities: Copper (primary)
- Permitting: None acquired; exploration permits complete
Reports
Website: https://lioncg.com/
Report Date: 2022
Region: Lyon County, Nevada, USA
Project Status:
Commodity: Copper
Throughput:
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Mine Type:
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Technical report and processing history
The following archived source profiles have been consolidated here to preserve the project’s processing history and study context.
MacArthur Copper Project — 2014 Preliminary Economic Assessment
MacArthur Copper Project — 2014 Preliminary Economic Assessment
| Company | MacArthur Metals |
| Date | 2014 |
| Region | Yerington, Nevada, USA |
| Commodities | Copper |
| Mine Type | Open Pit |
| Throughput | Not specified |
| Mine Life | Not specified |
| Annual Production | Not specified |
| Status | Development |
Executive Summary
The MacArthur Copper Project Preliminary Economic Assessment outlines the planned recovery methods for the MacArthur Copper Project located near Yerington, Nevada. The proposed processing facilities include a ROM heap leach facility designed to recover copper from mineralized material using an acidified leach solution. This is followed by a solvent extraction and electrowinning (SX/EW) circuit to produce cathode quality copper for sale. The project also includes a sulfuric acid plant to generate the necessary acid for leaching and a power plant to generate electricity from waste heat produced during sulfur combustion.
The heap leach pad design adheres to Nevada Division of Environmental Protection requirements, featuring a compacted soil base, clay or geosynthetic liner, and HDPE liner with a perforated piping network. Mineralized material is mined from open benches and stacked on the pad, where it is irrigated with raffinate. The pregnant leach solution (PLS) flows by gravity to a collection pond and is pumped to the solvent extraction circuit at a rate of 10,400 gallons per minute.
The solvent extraction plant utilizes mixer-settlers to transfer copper from the aqueous phase to an organic phase, which is then stripped using an acidic electrolyte solution. The rich electrolyte is pumped to electrowinning cells where copper is plated onto stainless steel cathode blanks. The cathodes are harvested weekly, stripped, and bundled for shipment. Ancillary facilities include solution ponds, water and power distribution, and infrastructure to support the operations.
Reports
Website: https://www.juniorminingnetwork.com/junior-miner-news/press-releases/989-cse/leo/115411-lion-copper-and-gold-corp-releases-updated-geology-resource-presentation-on-the-macarthur-copper-project.html
Report Date: 2014
Region: Yerington, Nevada, USA
Project Status: Development
Commodity: Copper
Throughput: Not specified
Mine Life: Not specified
Mine Type: Open Pit
Ore type:
MacArthur Copper Project — 2012 Preliminary Economic Assessment
MacArthur Copper Project — 2012 Preliminary Economic Assessment
| Company | MacArthur Metals Ltd. |
| Date | 23 May 2012 |
| Region | Nevada, USA |
| Commodities | Copper |
| Mine Type | Open Pit |
| Status | Development |
Executive Summary
The MacArthur Copper Project Preliminary Economic Assessment outlines a comprehensive recovery plan utilizing heap leach technology for copper extraction. The process involves mining ore from open benches and stacking it on a heap leach pad, where it is irrigated with an acidified leach solution to dissolve soluble copper. The resulting pregnant leach solution is collected and processed through a solvent extraction and electrowinning circuit to produce LME Grade A copper cathodes.
Supporting infrastructure includes a sulfuric acid plant to generate the necessary leaching acid and a power plant designed to generate electricity from waste heat produced during sulfur combustion. The facility is designed to conform to Nevada Division of Environmental Protection requirements, featuring a multi-layer liner system for the heap leach pad and solution ponds to manage water balance and prevent environmental contamination.
Processing Profile
- Leaching: Heap Leach (ROM)
- Solvent Extraction: Mixer-Settlers (3 stages extraction, 1 stage stripping)
- Electrowinning: Stainless steel cathode blanks
- Acid Plant: Sulfur burning with waste heat recovery
Reports
Website: https://www.globenewswire.com/news-release/2020/04/29/2024277/0/en/further-exploration-for-gold-and-copper-planned-for-macarthur-s-hillside-project.html
Report Date: 23 May 2012
Region: Nevada, USA
Project Status: Development
Commodity: Copper
Throughput:
Mine Life:
Mine Type: Open Pit
Ore type:
MacArthur Copper Project — Preliminary Economic Assessment
MacArthur Copper Project — Preliminary Economic Assessment
Project: MacArthur Copper Project
Report Type: Preliminary Economic Assessment (PEA) – Form 43-101F1
Date: 23 May 2012
Document Number: M3-PN110127
Revision: 0
Executive Summary
The MacArthur Copper Project is a copper development project located in Nevada, USA, near the Yerington site. The project utilizes a ROM (run-of-mine) heap leach facility to recover copper into a leach solution, followed by solvent extraction and electrowinning (SX/EW) to produce cathode-quality copper for sale. The process facilities also include a sulfur-burning sulfuric acid plant that generates electrical power from waste heat produced during sulfur combustion.
The heap leach operation will process copper ore mined from open benches. The ore will be transported directly to the heap leach pad and stacked, then irrigated with an acidified raffinate solution. The pregnant leach solution (PLS) will be pumped at 10,400 gallons per minute with approximately 1 gpl copper to the solvent extraction circuit. The SX plant consists of one train of mixer-settlers with three stages of extraction in a series-parallel configuration and one stage of stripping. The electrowinning circuit contains 54 cells that produce LME Grade A copper cathodes, harvested weekly and bundled into 2-3 ton packages for shipment.
Processing Overview
The MacArthur Copper Project employs a conventional heap leach-SX/EW flowsheet for copper recovery. Key facilities include the heap leach pad designed to NDEP requirements, solution ponds, a solvent extraction plant, electrowinning tankhouse, sulfuric acid plant, and power generation facilities. The sulfuric acid plant uses a double-contact double-absorption process that conforms to Best Available Demonstrated Control Technology (BADCT) for sulfur dioxide emissions. Waste heat from the sulfur combustion process drives a steam turbine generator to produce electrical power for the operation.
Processing Details
17.2 Heap Leach Pad
- Ore Placement: Direct haul from open pit to leach pad
- Irrigation: Drip emitters with raffinate solution
- PLS Rate: 10,400 gpm at 1 gpl copper
- Pad Design: Compacted soil base, clay/GCL liner, HDPE liner, perforated collection piping, 24 inches crushed over-liner
17.3 Solvent Extraction
- Configuration: One train of mixer-settlers
- Extraction Stages: Three stages (series-parallel)
- Stripping Stage: One stage
- Flow: Counter-current aqueous/organic flow
17.4 Electrowinning
- Cells: 54 electrowinning cells
- Product: LME Grade A copper cathodes
- Harvesting: Weekly schedule
- Packaging: 2-3 ton bundles
17.5 Sulfuric Acid Plant
- Process: Double-contact double-absorption
- Sulfur Source: Molten sulfur delivered by rail
- Converter: Four-bed converter with vanadium pentoxide catalyst
- Product: 98.5% H2SO4
17.6 Power Plant
- Steam Source: Waste heat boiler from sulfur furnace
- Turbine: Steam turbine generator
- Cooling: Cooling towers with chemical water treatment
- Water Treatment: Filtration, cation exchange softening, RO filtration
Ancillary Facilities
- Fuel storage and distribution
- Electrical substation
- Guardhouse and truck scale
- Refurbished buildings: administration, analytical lab, mine truck shop, warehouse, maintenance facilities
Website: https://lioncg.com/projects/yerington-project/
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