Montreal-based Afri-Can Marine Minerals (AFA-M) has completed a marine geophysical survey of block J at its marine diamond concession north of Luderitz, Namibia.
Afri-Can says 17 prospective areas in eight geomorphical features may have potential for diamond entrapment.
Marine & Coastal Geosciences, Afri-Can’s South African-based contractor, completed 910 line km of high-resolution surveying on the block. It recommends a sampling program to determine and model the geology and test for the presence of diamonds at each site.
The identified features represent various depositional environments in water that is 75-110 metres deep.
Bathymetric, seismic and sonographic data have outlined:
- The Northern deposit — a fine, sedimentary deposit with four depressions draining into an embayment;
- The Northern reef — a large reef complex comprised entirely of crystalline bedrock outcrops with minimal coarse sediment cover;
- The Northern embayment — a large northwest-facing embayment measuring 3 km by 12 km in its central part;
- The Northern terrace — a gradually sloping terrace measuring 3.8 km by 13 km;
- The Central reef — a reef complex made up entirely of crystalline bedrock;
- The Southern deposit — a sedimentary deposit extending 21 km from the southern boundary of the concession;
- The Southern depression — a mostly fine sedimentary deposit; and
- The Southern reef — an occurrence of semi-isolated reefs consisting of outcrops of crystalline bedrock.
Afri-Can is planning a three-phase prospecting program, including initial sampling, follow-up sampling and mine evaluation sampling.
Planning for the initial sampling will take about two weeks. A contractor will be named soon thereafter.
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