Perseus Mining Announces High Grade Drill Results at Edikan Mine Site
Perseus Mining Limited has recently provided details of further high-grade gold intercepts during recent drilling on the Bokitsi South Deposit at its Edikan Gold Mine (EGM) in Ghana, West Africa. The Bokitsi drill program included 37 RC drill holes totaling 2,973 meters. Aside from the three holes that were diamond core tailed due to the presence of water, the predominantly RC drilling program was conducted with dry samples.
This drilling program targeted areas containing Inferred Mineral Resources at Bokitsi South. The southern extent of the lode was also tested. The drill results will now be incorporated into a revised estimation of the Mineral Resources at Bokitsi South to be published early in the September 2014 Quarter. A maiden Mineral Reserve estimate for the Bokitsi South deposit based on the updated Mineral Resource data is expected to be released late in the September 2014 Quarter.
The Bokitsi sediment shear hosted mineralized zone extends along the western flank of the Fetish deposit to 1.5 kilometers to the south. Mineralization is contained in a 5 to 25 meter-wide shear zone in volcaniclastic sediments with silica-sericite alteration, quartz veining and 1 to 3 percent pyrite plus arsenopyrite. While the granite-hosted deposits at Edikan tend to be low-grade and wide, the sediment shear-hosted deposits are narrower and of a significantly higher grade.
Two discrete deposits have been delineated on the trend, including Bokitsi North, which is located immediately west of the Fetish deposit, and Bokitsi South. Oxide ore was mined from both deposits in the 1990’s, with the Bokitsi South lode exploited by Ashanti Goldfields.
Metallurgical test work conducted on the Bokitsi South gold mineralized material indicates that it is amenable to processing through the EGM circuit at marginally lower recoveries than the Edikan granite orebodies.
BHP, Rio Tinto & Vale launch Charge On Innovation Challenge
Mining giants BHP, Vale and Rio Tinto have launched the 'Charge On' Innovation Challenge to solve one of the biggest challenges the industry faces today - decarbonising mining operations.
'Charge On' Innovation Challenge
In partnership with Austmine, Australia's leading mining equipment, technology and services industry association, founding patrons BHP, Vale and Rio Tinto have launched the competition to encourage technology innovators to develop new concepts for large-scale haul truck electrification systems. The main goal is cutting emissions from surface mining operations.
“The mining industry needs to be at the forefront of tackling the climate challenge. The Charge On Innovation Challenge is a great example of the current collaborative work being done by the mining industry and mobile equipment manufacturers to decarbonise mining fleets,” the trio said in a media statement.
“In addition to providing a zero-carbon energy source, the conversion of mobile mining equipment to battery-electric can potentially unlock value, as electric motors have fewer moving parts when compared to standard equipment.”
A number of non-traditional mining sector vendors are actively developing technologies that can assist in mine electrification. By submitting a Challenge to the market, the Patrons of Charge On expect to:
- Demonstrate there is an emerging market for charging solutions in mining
- Accelerate commercialization of solutions
- Indicate to suppliers, the mining industry seeks interoperable solutions
- Maintain multiple actors and competition in the supply chain
- Integrate innovations from other sectors into the mining sector
"We expect some solutions identified in the Challenge could provide propulsion to existing diesel-electric trucks. This may present a pathway to early implementation for dynamic charging solutions," the trio said.
Found patrons BHP, Vale and Rio Tinto are pledging their commitment to fighting climate change:
"The mining industry has an important role to reduce emissions and do our part to achieve the Paris Agreement goals to limit the impacts of climate change."
The Charge On Innovation Challenge asks vendors to present interoperable solutions that can safely deliver electricity to large battery-electric off-road haul trucks in a way that maintains or improves current productivity levels. Specifically, mechanisms capable of delivering in the order of 400kWh of electricity to each truck within a haul cycle (ie load, travel, dump, return, queue). The delivered electricity is to charge a battery, and if applicable directly propel the truck.
Austmine CEO Christine Gibbs Stewart commented: “We expect the Challenge will attract companies from a broad range of sectors including mining, automotive, aerospace, agriculture, and defence to deliver selected charging concepts to create a standard product that can interface with all trucks."
More information about the challenge will be released on May 18.
The competition echoes growing efforts being made across the industry to tackle emmissions and promote electrification. In march this year, the Electric Mine Consortium was launched. It's founding members include Gold Fields, Dassualt Systemes and Sandvik who pledged their commitment to decarbonising mining operations.