Apollo Minerals Ltd (ASX:AON) will take a big step forward with regional exploration at the province-scale Kroussou Zinc-Lead Project in Gabon through an extensive airborne electromagnetic (AEM) survey.
The survey, which is underway utilising the helicopter-borne Xcite™ AEM system, will cover the entire Kroussou prospective trend including all 18 target prospects along the 80-kilometre strike length.
It is the first time that modern airborne geophysics have been undertaken at Kroussou and has the potential to identify and refine shallow, embayment-style, high-grade mineralisation targets like those discovered at Dikaki (TP11) and Niamabimbou (TP6).
“Major step forward”
Apollo Minerals’ managing director Neil Inwood said: “This AEM survey is a major step forward for our regional-scale exploration activities at Kroussou and has been in the planning since the start of the year.
“The results from the survey will enable us to test the entire 80-kilometre Kroussou trend, identify and refine exploration targets, and provide valuable structural targeting information.”
The AEM survey will also extend into the western basin region, which is interpreted as being a potential source for the base metal mineralisation at Kroussou.
This region is also prospective for high-grade mineralisation and has not previously had systematic exploration undertaken.
Kroussou Project with AEM survey area.
Apollo Minerals is actively drilling at TP13 and TP11 targets and expects to have additional exploration drilling results available in the upcoming weeks.
Xcite™ AEM system
The AEM survey at Kroussou is being conducted by New Resolution Geophysics (NRG) utilising the helicopter-borne Xcite™ AEM system, which has been specially designed for surveys with a towed array suitable for low-level flying, offering the detection of early time (near-surface) potential conductors.
This allows near-surface anomalies to be detected using the fast-time response signal, which is important for Kroussou given the outcropping and near-surface sulphide mineralisation already defined at prospects, TP6 and TP11.
Deeper buried conductors may also be possible to be defined in the basin on the western margin using late time response signals.
The survey will also include magnetic information, which will provide valuable structural targeting data to progress the regional exploration and has the potential for further identification of shallow, high-grade mineralisation.
All equipment for the work is in Gabon and the AEM survey is planned to take around three weeks of data capture, with evaluation and review of results to be concurrent. Final processed results are expected in the September quarter.
Kroussou consists of the Prospecting Licence G4-569 which covers 986.5 square kilometres in the Ngounié Province of Western Gabon, about 220 kilometres SSE of the capital Libreville.
Location of the Kroussou Project in Gabon with nearby transport infrastructure.
The project is easily accessible by the major sealed N1 road from Libreville, and well-maintained provincial roads to towns bordering the project. Well-established and wide forestry tracks are present within the project area to the camp and exploration sites.
Eighteen separate shallow channels (target prospects) with base metal occurrences have been identified along more than 80 kilometres of strike length of prospective geology in the project area.
Apollo Minerals completed a maiden drilling campaign in 2021, which returned significant wide zinc-lead mineralised intercepts from shallow depths at Dikaki and Niamabimbou, two of the 18 target prospects.
The results indicated a developing discovery at Dikaki and confirmed shallow mineralisation at Niamabimbou and validate the province-scale, base metal potential of Kroussou.
There are multiple opportunities for further discovery of zinc-lead mineralisation within the remaining untested channels.
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