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Castle defines, extends Ghana graphite project

A ground-based electromagnetic survey has given clearer definition to the graphite mineralisation at Castle Minerals’ Kambale graphite project in Ghana and indicates likely extensions of the orebody into underexplored ground.

The junior explorer and project incubator said the recently completed ground-based electromagnetic, or ‘HLEM’ survey at Kambale generated more detail and indicated likely below-cover extensions to the graphitic schist host deposit.

It also showed strong correlations between zones of high conductivity and previously drilled areas that confirmed graphite mineralisation.

The survey interpreted several offsetting bedrock structures, some that correspond with known higher-grade areas, implying other such zones may exist.

Castle is planning to crack on with a follow-up drilling program to test the extent and quality of the mineralisation and once completed, aims to extract a bulk sample for a second phase of metallurgical test work.

The company says there appears to be extensive north and south extensions outside of the existing Kambale graphite inferred resource orebody, implying it could be materially increased with further exploration.

According to management, a 1.3 kilometre north-south trending conductor on the far western side of the survey area that has never been drill tested. Drilling on the northern extent of the Kambale resource also appears not to have extended far enough west and clearly remains open to the north for at least 200m.

The HLEM survey at our Kambale graphite project has not only achieved our main objective of better defining the extent of the graphite mineralisation below cover but has also provided a very strong indication of likely extensions to the known resources and mineralisation.

Castle used a local group, SAGAX Afrique SA, for the 2.7km long survey with project management and interpretation done back in Perth by Terra Resources.

The Kambale graphite project dates back to the 1960s when identified by Russian geologists prospecting for manganese. Castle picked up the ground after reviewing historic drilling records and those from previous operator Newmont Limited. Castle started drilling in 2012 and has redoubled its efforts in the past two years, producing a 96.4 per cent total carbon fine flake graphite concentrate from test work on near-surface samples.

The company is also developing its Earaheedy Basin base and precious metals project, the Beasley Creek gold project in the southern Pilbara, the Success Dome gold and base metals project in the Ashburton corridor along with a handful of other early-stage exploration projects chasing lithium in addition to gold and graphite targets.

Castle’s March quarterly report might be an interesting read, given in December it alluded to nine separate exploration programs currently underway.

Is your ASX-listed company doing something interesting? Contact: matt.birney@wanews.com.au

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