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Chilwa Minerals Ltd (ASX:CHW)

ALERT: Price-sensitive ASX Announcement for CHW
Current share price for CHW : $0.750 0 (0%)+
Announcement
Release
9 Oct 2026 8:55AM
Price at Release
$0.750
Full Release
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Summary
Chilwa Minerals Limited announced a Phase I drilling update for its Mpyupyu West heavy mineral sands prospect in southern Malawi, confirming the overall outline of a more than 17 square kilometre target adjacent to the existing Mpyupyu Resource. As at 6 October 2026, the company had completed 218 of a planned 272 sonic drill holes for 2,292 metres, representing about 80% completion, with drilling on a nominal 400 mN by 200 mE grid consistently intersecting a near-surface mineralised profile averaging about 8.6 metres to the base of mineralisation and terminating at saprock. The logged sequence is broadly consistent across the prospect, comprising silty sand, laterised silty sand, sandy clay and a dominant free-dig saprolite unit, with saprolite making up around 63% of the average profile thickness, supporting the interpretation of Mpyupyu West as an in-situ, deeply weathered saprolite-hosted HMS system rather than transported dune or strandline sands. The company stated that no drilling exploration results or assays are reported in this announcement; instead, geological logging, on-site panning and pXRF have been used for domaining and modelling only, while sink-float assay samples have been shipped internationally and results are expected in late October 2026, after which Chilwa expects to report a maiden Exploration Target under JORC. Both sonic rigs remain on site and, after Phase I completion, the company plans Phase II infill drilling at 100 mN by 100 mE spacing to support resource definition, alongside bulk density work, QEMSCAN and continued Scoping Study work based on its broader Lake Chilwa HMS portfolio, including the existing Mpyupyu Mineral Resource of 109.6 Mt at 3.28% THM announced earlier in June 2026.
Key Points
  • Chilwa Minerals reported that Phase I sonic drilling at Mpyupyu West has broadly confirmed the outline of a heavy mineral sands target exceeding 17 square kilometres.
  • As at 6 October 2026, 218 holes for 2,292 metres had been completed, representing about 80% of the planned 272-hole programme.
  • Drilling on a 400 mN by 200 mE grid indicates an average depth of about 8.6 metres to the base of the mineralised interval.
  • The stratigraphy is consistent across the prospect, with silty sand, laterised silty sand, sandy clay and a dominant free-dig saprolite unit over saprock.
  • Saprolite accounts for about 63% of the average logged profile thickness, supporting an in-situ deeply weathered saprolite-hosted HMS interpretation.
  • Mpyupyu West differs from the company’s existing Mpyupyu Dune and Flat deposits because it appears to be an in-situ saprolite system rather than transported sands.
  • No drilling exploration results, grades or assays were reported in the announcement.
  • Samples have been shipped for laboratory sink-float assay to determine total heavy mineral content, with results expected in late October 2026.
  • Chilwa expects assay results to support reporting of a maiden Exploration Target under the JORC Code.
  • Both sonic rigs remain on site and are expected to move to Phase II infill drilling at 100 mN by 100 mE spacing after Phase I is completed.
  • The prospect lies adjacent to the existing Mpyupyu Resource, which had previously been updated to 109.6 Mt at 3.28% THM.
  • The announcement forms part of Chilwa Minerals’ broader development and scoping work across its Lake Chilwa heavy mineral sands projects in southern Malawi.
IMPORTANT NOTE: This information is autogenerated and has not been reviewed for accuracy or completeness. You should refer to the full announcement here for further information.