Si6’s recent geophysical survey has added a plethora of sulphide targets below and along strike of the current resource at the Maibele North prospect in Botswana.

The audio-frequency magnetotellurics (AMT) survey covered the entire area of the nickel-copper-cobalt-platinum group elements prospect as well as strike extensions.

Si6 Metals (ASX:Si6) executive chairman Patrick Holywell said the AMT survey had continued the success of its Botswana exploration program by accurately mapping the existing sulphide mineralisation and identifying numerous untested sulphide targets below and along strike of the current resource.

Maibele has a current resource of 2.38 million tonnes grading 0.72% nickel, 0.21% copper and 0.63 grams per tonne 4PGE+gold.

“Through our targeted approach, which utilises various ground geophysical techniques to target deeper mineralisation, we are really starting to gain a better understanding of what we are dealing with and in turn, plan our future drilling programs in more detail,” Holywell added.

“We anticipate following up the AMT targets with a combination of RC and diamond drilling, in addition to planning for further AMT surveys to the east and west of the current survey area.”

si6 metals Maibele North slice amt survey target
Depth slice of AMT results for Maibele North (and part of Airstrip) at 500m vertical depth showing the MARD0094 and MADD0153 holes. Pic: Supplied

AMT survey

The deeper, untested zones detected by the AMT survey occur as distinct anomalies and generally lie beneath the thicker zones of mineralisation within the orebody.

Highlighting this, the most prominent anomaly was found below the thickest massive sulphide occurrences in hole MADD0057, where over 15m of massive sulphides were intersected.

At Maibele East, the survey detected a large, strong anomaly corresponding to the mineralisation intersected in MARD0094 and confirmed the narrow nickel sulphide mineralisation observed in MARD0153 lies on the periphery of this very prominent zone.

Si6 says the AMT anomaly is located south of MADD0153 and that the strength of the response in the area of the MARD0094 mineralisation is modest compared to the very strong response extending to the west and south of these two drill holes.

A further strong response is located on the extreme eastern edge of the survey and will require further AMT lines to fully define.

Over at the promising Airstrip prospect, the survey highlighted a small but strong response coincident with, and beneath, some of the shallow high-grade copper-nickel mineralisation intersected in previous drilling.

The company says this indicates a potential deep source of mineralisation beneath the shallow high grades.

Future work programs

The AMT survey has defined a number of drill-ready targets that are prospective for additional nickel sulphide mineralisation.

Quotes are being sought by the company from reliable in-country drill companies to carry out reverse circulation and diamond drilling on these targets.

It is also reviewing the results with the intention of planning further AMT surveys to the east and west of the current survey.




This article was developed in collaboration with Si6 Metals, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.