Please note that the Kalaka project is still subject to closing conditions between Moydow and Panthera Resources.
The Kalaka gold project is located in the southwest of Mali, approximately 55km south of the 7Moz Morila gold mine (Barrick/AngloGold) and 85km northwest of the 7Moz Syama gold mine (Resolute).
The area is located over the major crustal scale Banifin Shear one that can be traced for over 40km before it continues into the Ivory Coast in the southwest and is hidden by younger cover rocks in the northeast. The local geology consists of a narrow, highly deformed greenstone belt that comprises metasediments with granodiorite intrusions elongated in the direction of shearing.
Mineralisation consists of highly sheared and altered (silica, sulphide, biotite) granodiorite dykes within similarly altered metasediments. Some similarities with the early stage of mineralisation at Morila can be seen.
A significant amount of previous exploration has been undertaken within the current project area, including soil sampling over the entire tenement area (7,349 samples), airborne geophysics (909 line km magnetics and EM), ground IP and 20,952m drilling (RAB/AC/RC/DD) in 372 holes.
This work has identified four sub-parallel zones of gold mineralisation with an interpreted combined strike of approximately 47km based on geochemistry, drilling and geophysics.
RAB drilling as follow-up to the regional soil sampling has identified three sub-parallel zones of gold in soil anomalism including the main K1A prospect. It is now interpreted that the gold in soil anomalies are only closed off due to unsuitable sampling media as shown by the regolith mapping and topography. This means that the mineralisation remains open.
The areas identified by the RAB drilling have been partially followed up by Aircore, RC and diamond drilling. This resulted in the identification of large widths of low-grade mineralisation in most areas tested. The K1A prospect has been further foll0wed up with RC and diamond drilling at around 100m line spacing. This drilling outlined mineralisation over at least 750m strike, 150-200m width, and over 200m depth (open at depth) that averages around 0.5g/t Au.
Based on the presence of significant sulphide alteration, a ground EM survey was recently conducted. This confirmed that the K1A mineralisation has a strong IP Chargeability anomaly associated with it. It also identified a stronger chargeability anomaly, offset to the northeast, that has only had very limited shallow RAB drill testing, which is interpreted to have been too shallow to reach mineralisation. This anomaly forms an excellent exploration target, with potential for higher gold grades based on the more intense chargeability high which suggests a higher sulphide content.
The success of the IP survey suggests that this is an excellent exploration targeting tool that may be able to be used to identify and rank additional targets.
It can thus be seen that large areas of low-grade mineralisation have been identified to date. However, the large size of the system augurs well for discovery of higher-grade zones in areas of structural complexity and / or more favourable host rocks. In particular, potential for higher grades can be seen within the combined 47km of prospective strike defined by soil sampling and drilling at the following targets:
- K1A northeast IP chargeability anomaly, higher chargeability potentially indicating more sulphides and hence higher gold grades.
- Southern Artisanal Zone where a 1000m x 150m zone of intense artisanal mining suggests a similar size target to K1A but with potentially better grades as shown by rock chip sampling of dump material (up to 10g/t Au) and the extensive artisanal activity (see image below).A mineralised (artisanally mined) cross structure may also have created higher grades in its vicinity.
- Northern Artisanal Zone where a different host-rock (sericite altered felsic intrusive/extrusive) may have been more conducive for mineralisation.
- Other areas with structural complexity within the combined 47km strike. These include cross faults and shadow zones around an interpreted granite intrusion in the far south of the tenement.