Arc Minerals (AIM: AMGO) said it has mapped an 18-kilometre geological contact at its Virgo copper project in Botswana, significantly expanding the prospective structure ahead of drilling.
The AIM-listed copper explorer said the newly mapped structure is around 14 kilometres longer than previously expected.
The work was completed through an induced polarisation survey, which identified several high-priority chargeability and resistivity anomalies.
Arc said the survey also highlighted areas of structural complexity that could act as potential mineral trap sites.
The inferred contact between the D’Kar and Ngwako Pan formations is now more than four times longer than the company had previously anticipated.
Chief executive Remy Welschinger said the structure lies within metres of MMG’s Mawana Fold and Zone 9 discoveries at the Khoemacau mining project.
Arc said the results remain qualitative exploration targets and require geological testing through drilling.
The company is finalising the appointment of a drilling contractor, with drilling expected to begin in early August.
Welschinger is due to present a Virgo project update through Investor Meet Company on 30 July at 4.30pm BST.
