Mwana Africa PLC is pleased to announce a 41% increase in the JORC compliant gold resource at its 80% owned Zani-Kodo gold prospect in the Ituri region of north eastern DRC.
Kalaa Mpinga, CEO of Mwana, commented:
"The increased tonnage and grade of our resource at Zani-Kodo, announced today, confirms our belief that we have a world class gold deposit situated in a new, major, emerging gold province now developing in Africa."
The resource update covers the Kodo Main, Badolite and Zani Central areas of Mwana's 80% owned Zani Kodo exploration project in the Ituri Region of north eastern DRC. Table 1 summarises the results.
|July 2011 Resource Update||Current Resource Update||Variance|
|Deposit||Class||Tonnes||Au (g/t)||Metal (oz)||Tonnes||Au (g/t)||Metal (oz)||Tonnes||Au (g/t)||Metal|
Note: Cut-off grade of 0.5g/t utilised
The positions of the resources and exploration targets along the Zani-Kodo trend are shown in Figure 1.
A further five diamond holes have been drilled since July 2011 to target the downdip extension of the Kodo Main ore zone. All holes intersected the mineralised zone as predicted and confirmed excellent continuity of both widths and grades in this area. Results are summarised in Table 2:
|Hole ID||From (m)||To (m)||Width (m)*||Grade (g/t)|
*Measured widths, not true widths.
A detailed reinterpretation of the Kodo drilling data was undertaken taking into consideration all available geological information including newly drilled holes, downhole structural data, detailed lithological logging, and field observations. This resulted in the definition of a robust structural model, with mineralisation related to a thrust fault system which has been disrupted by late vertical faults. The bulk of the Kodo mineralisation is situated along a basal thrust at the contact between Banded Iron Formations ("BIF's") and a competent footwall meta-greywacke. Hanging wall zones have been remodeled as steeper splay structures. The thrust system has been subsequently disrupted by late NE trending vertical faults which define distinct blocks across the deposit (Figure 2). Figure 3 presents a cross section through the central portion of Kodo main orebody showing grade continuity.
The new structural model has allowed for a considerable reduction in dilution, resulting in a lower tonnage, but significantly higher grade in the Kodo area.
The Kodo Main area remains open at depth.
This area is situated on the Zani-Kodo trend 1.5km to the south of Kodo Main (Figure 1). One further hole was drilled at the Badolite area to fully close off the mineralisation against the NNE trending fault which marks the southern limit of the deposit. This has resulted in a 9% rise in the inferred resource in this area.
The Badolite area remains open at depth.
Drilling was completed at this target area which covers 650m strike length of the Zani-Kodo trend immediately south of Badolite (Figure 1). Results are shown in Figure 4, which shows a continuous, broad low grade zone, with local high grade areas (Figure 5).
The Zani Central area remains open at depth.
The detailed reinterpretation at Kodo along with the definition of significant resources along the Zani-Kodo trend has clarified the geological model of the area and confirmed the further potential of the area along the full 9km strike length of the mineralised structure. To date, 317 holes for 70,656m have been drilled at Zani Kodo, with only 3.2km of the total strike length drilled to date.
Drilling in 2012 will extend outwards along the strike of the Zani-Kodo trend, and will initially focus on the following areas:
For figures 1-5, please click here
Charl du Plessis, Executive Vice President Exploration of Mwana Africa, who holds a PhD and is a Member of the AusIMM, is a 'Qualified Person' as defined in the AIM Rules. The exploration and resource information contained in this report pertaining to Zani Kodo have been reviewed and verified by Dr Du Plessis.
Donald McAlister / Lorenz Werndle
Tel: +44 (0)20 7654 5580
(Nominated Adviser and Broker)
Richard Morrison / Jen Boorer
Tel: +44 (0) 20 7634 4700
Jon Belliss / John Grant / Parimal Kumar
Tel: +44 (0)20 7101 7070
David Simonson/ Anca Spiridon
Tel: +44 (0)20 7726 8400