ZMI increases Kildare zinc and lead resource to 860,000t
Zinc of Ireland NL (ASX:ZMI) has released an updated independent Mineral Resource Estimate for the Kildare Zinc Project, 40 kilometres south-west of Dublin, Ireland.
The updated resource ticks another important box for the group’s Kildare Zinc Project, with the contained zinc and lead resource inventory increasing to more than 850,000 tonnes.
This significant improvement to the resources at Kildare greatly reduces the exploration risk threshold and provides a very strong foundation for ZMI’s ongoing exploration, which is seeking to discover new zones of mineralisation, while also expanding the known mineralisation.
The Inferred Mineral Resource for the McGregor and Shamrock Zones of the Kildare Zinc Project using the preferred zinc equivalent cut-off grade of 5.5% is summarised in the following table.
The excellent results of ZMI’s recent metallurgical test work further reinforce Kildare’s value.
With an enterprise value of $9 million, the company is certainly punching above its weight with an inferred mineral resource of 9 million tonnes at 9.5% zinc and lead and multiple zones of mineralisation from near surface demonstrating 500 metres of vertical extent.
It is worth noting that the company has approximately $3 million in cash which will fund an ongoing and extensive drilling campaign that could well see the company in a position to make strong inroads into establishing a pre-development footprint in the second half of 2019
Good postcode, proven management
Ireland has a rich history of zinc mining as demonstrated by the profitable Lisheen and Galmoy mines which were also located within the Rathdowney Trend within 80 kilometres of Kildare.
With a substantial resource inventory, significant exploration upside, excellent metallurgical performance, and additional de-risking activities ongoing, the Kildare Project remains well-poised on the pathway to development.
Prior to completing the updated resource estimate, ZMI technical management and its specialist consultants undertook a multi-phase data acquisition programme in order to materially increase the level of knowledge and understanding of the Allenwood Graben, a highly prospective area of approximately eight square kilometres located within the greater Kildare Project.
This included sampling and assaying of approximately 4100 metres of previously unsampled drill core, structural and geochemical review of the entire Allenwood Graben, exploration drilling and metallurgical test work.
The latter has been particularly important in terms of establishing a zinc equivalent cut-off grade for use in resource reporting.
The metallurgical test work was carried out at a course grind size using a standard differential flotation process and a standard reagent regime.
This is a highly technical part of assessing the commercial viability of the ore which will be part and parcel of determining the economic credentials of the project, and in ZMI’s case the bottom line clearly delivered promising metallurgical results.
These included an overall 96.4% recovery of zinc to the concentrate was achieved, with a 56% zinc grade in the concentrate and with minimal lead of less than 0.5%.
The lead concentrate achieved 86.4% recovery with a 62% lead concentrate grade and minimal zinc of less than 3%.
Management has gone to exhaustive lengths in all aspects of developing the project, including the retrieval of historical data, exploration outside of known mineralisation and extensive deeper drilling based on well researched targets.
ZMI’s approach to arriving at a zinc equivalent formula was just as intricate with the group applying average prevailing zinc and lead prices over the last five years.
Consequently, the data underpinning the resource estimate appears sound, providing an accurate foundation for further resource expansion.
Expansion of resource proximal to McGregor and Shamrock
The Phase 1 exploration drilling campaign is ongoing in the Allenwood Graben with multiple rigs targeting areas with the potential to host additional zones of mineralisation similar to McGregor and Shamrock.
The planning of the Phase 2 drilling campaign is also being advanced, with particular focus being on the significant potential to expand the resource proximal to McGregor and Shamrock.
Allowances will also be made to follow up areas of priority from the Phase 1 drilling.
Parallel activities such as environmental, ESIA and additional metallurgy work will also be undertaken with a view to further de-risking the Kildare Zinc Project, such that any formal economic and development studies to be undertaken in the future can be expedited.
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