The drilling programme is a key component of the Feasibility study for Songwe, which is being fully funded by Talaxis Limited, a subsidiary of Noble Group Ltd.
The drilling programme is for a minimum of 5,000 metres and will be focused on infill, step-out and geotechnical drilling. Over 50 drill pads have been constructed along with new access roads and enlarged camp infrastructure.
Mkango is targeting completion of an updated mineral resource estimate by the end of 2018.
At that point, Talaxis will invest a further £7mln to fund completion of the feasibility study for Songwe.
"We are delighted to announce the commencement of the drilling programme at Songwe,” said Mkango chief executive William Dawes.
“This is a culmination of extensive preparatory work completed over recent months and we are excited to kick off what will be the largest drill programme to date at Songwe. Mkango is fully funded to completion of a feasibility study with a clearly defined pathway to production. We look forward to keeping the market updated as we progress through the drilling programme and other major milestones."