Corazon Mining Ltd (ASX:CZN) is using a new innovative geophysical processing technique to identify multiple new targets at Lynn Lake Nickel-Copper-Cobalt Sulphide Project in Canada.
Modelling of magnetic data utilising Magnetic Vector Inversion (MVI) has proven extremely beneficial for Corazon by opening up the prospectivity of the Lynn Lake Mining Centre.
It does so by identifying known previously mined ore bodies and resource areas down to at least 600 to 700 metres below surface.
This new method has proven more effective and accurate than the previously utilised Magnetic Susceptibility Inversion method and is double the depth of conventional techniques.
Corazon’s managing director Brett Smith said: “Our aim is to utilise this new modelling technique on a number of fronts at Lynn Lake.
“The potential for new discoveries is obvious, however, there are also numerous historically drill defined targets in the mining area that have yet to be properly tested.
“Our focus will be on these near-mine targets with a view towards optimising the potential of the mine area ahead of more detailed mine-planning and feasibility drill-outs for the project”.
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Corazon is focused on advancing the Lynn Lake project in parallel with its ongoing priority work programs at the Mt Gilmore Copper-Cobalt Project in New South Wales.\
Benefits of MVI
The benefits of MVI processing of existing detailed ground magnetic data are:
- Effective mapping of known mineralisation and deposits, and identification of new areas of interest within Lynn Lake’s prolific historical mining centre;
- High priority nickel-copper-cobalt targets defined adjacent to Lynn Lake’s historical mines; and
- Methodology also to be applied to numerous regional nickel sulphide targets.
“Substantial” level of information
Adoption of MVI follows a review of results from the last phase of drilling at the Fraser Lake Complex exploration play at Lynn Lake which targeted compelling anomalies generated by conventional modelling.
“Put simply the conventional inversion modelling methods didn’t deliver the results anticipated at the Fraser Lake Complex,” Smith said.
“We’re looking within a large, complex, multi-phase magmatic sulphide system with variable magnetic characteristics - too complex for the conventional methods to accommodate.
“With MVI, the level of information and detail is substantial and allows us to interrogate the anomalies better.
“Targets that have previously been ignored because of their overall magnetic characteristics are now being reassessed more favourably.”
Targets interpreted from IP surveys, with resource areas, historical stopes and definition of the Eastern Corridor.
READ: Corazon Mining delivers “exceptional” test results for Lynn Lake nickel and copper concentrates
Corazon recently received results from metallurgical test work on Lynn Lake mineralisation.
Despite Lynn Lake having a long mining history, modern reagents and processing techniques have enabled separate high-value nickel and copper concentrates to be produced for the very first time.
The initial work highlighted:
- Nickel concentrate with a grade of 26% nickel with recoveries of 71%; and
- Copper concentrate with a grade of 27% copper with recoveries of 77%.
These results were not optimised, and it is believed that further refinement of the test work could deliver even greater improvements, particularly in the recoveries.
New round of tests
A new round of test work is in progress incorporating the same float circuit used in the previous testing, however, utilising methodologies more representative of a commercial operation.
This work is expected to optimise the methodology and deliver similar high-grade concentrates, but with increased recoveries.
The metallurgical test work, which is being managed by METS Engineering, is expected to be completed in the next few weeks.