Rossing South Zone 1 and Zone 2 – new drilling results with exceptional grades
Kalahari Minerals plc, the AIM listed mining exploration and evaluation group with a portfolio of uranium, copper and base metal interests in Namibia, is pleased to provide an update released by Extract Resources Ltd, in which Kalahari’s subsidiary, Kalahari Uranium Limited, holds a 38.85% interest.
Extract today announced the continued intersection of strong chemical assay results from Rossing South.
- Six drill rigs now operating at Rossing South accelerating resource definition efforts
- Extensive zones of high grade alaskite hosted uranium mineralisation continue to be intersected
- Outstanding exploration potential to be tested
Resource Definition Update
Six drill rigs are now operating on site, four RC and two core rigs. One rig is completing 50m x 50m infill drilling over 200 metres of strike at the northern end of Zone 1. Once this drilling has been completed this rig will resume drilling at the southern end of Zone 1 where mineralisation is still open. This drilling is expected to add to the known dimensions of the Zone 1 uranium mineralisation.
Three RC rigs are now operating on Zone 2 closing the drill hole spacing down to a 100m x 100m grid for the initial resource estimate. With increased drilling rates now underway at Zone 2, a steady flow of chemical assay results is expected. Hand held spectrometer results indicate broad zones of strong uranium mineralisation.
The core samples from the two core rigs will enable site geologists to collect crucial structural, geotechnical, lithological and assay data. Whole NQ and half NQ core is being transported to Australia for comminution and metallurgical test work, as part of the Rossing South Feasibility Study.
All project work is on track for a revised Rossing South resource update in August 2009.
Nine kilometres of the prospective Rossing South stratigraphic trend remain to be explored. The results clearly show the same stratigraphy that hosts the Rossing and Rossing South deposits continuing under the Namib Desert cover south of the known extents of Zone 2 uranium mineralisation. A number of dilational sites (structural openings) are evident in this image; these have a high probability of hosting additional occurrences of uraniferous alaskite. The alaskites are passive intrusives and as such are generally located in zones of dilation.
It should also be noted that the Husab Uranium Project is located in the centre of “Alaskite Alley”, a zone in which all known occurrences of uraniferous leucogranite (alaskite) have been defined in Namibia. This location is coincident with high grade metamorphism, partial melting of basement rocks and the transport and enrichment of uranium. This central location is believed to be related to the elevated uranium grades at Rossing South and highlights the exceptional exploration potential still to be tested south of Zone 2.
A dedicated exploration drill rig is being sourced to follow up on this outstanding exploration potential.