The
Nefza Project is located in north-western Tunisia between the Atlas
Mountains and the Mediterranean Sea. The project is covered by an
Exploration Permit over an area of 3,069 sq km about 80 km to the west
of Tunis and is served by excellent infrastructure.
The licence contains large areas of carbonate rocks containing
signifi cant zinc-lead prospects that supported substantial past mining
operations, and a series of volcanic and intrusive rocks that are
associated with significant gold-copper mineralisation.
From mid 2005, Albidon embarked on an evaluation of the zinc-lead
potential of the Nefza licence area with the aim of prioritising
targets for geophysical surveys and drill testing. The key results of
work to date are:
- Recognition of the potential for large
'carbonate-replacement' zinc deposits of similar character to the large
Jinding deposit in Yunnan, China (approx. 140Mt @ 8% Zn, 1.5% Pb).
- Substantial amounts of near-surface mineralisation remain at some of the old zinc mines, most signifi cantly at Bou Aouane.
- Extensive
Zn-Pb anomalies defi ned by stream sediment and soil sampling,
identifying target areas related to major structures in zones extending
from known deposits.
Fieldwork
in 2007 focused on geophysical surveys (IP and gravity) along the main
prospect trends with additional detailed mapping and geochemical
sampling. Eleven drillholes were completed at Bou Aouane and one
drillhole at El Haouria.
The objective of the drilling programme was to confi rm the
thickness and grade of zinc mineralisation reported in previous
drilling at Khatkhadha and to provide reconnaissance drill coverage of
the adjoining area. The programme was directed towards locating zinc
mineralisation where grade is controlled by a favourable combination of
fault structures and geology.
Drill hole BADD003 was drilled within the reported Khatkhadha
mineralisation and intersected 5.5m at 3.9% Zn and 0.1% Pb from 15m
down hole, and 8.1m @ 11.7% Zn and 0.6% Pb from
21.4m down hole. These intervals are separated by 1.4m of core loss
(see table). The drill results support the reports of a remnant
mineralised body at Khatkhadha. The mineralisation is near-surface and
may be accessed by an open pit were a suffi cient resource defi ned.
Additional drilling is planned within the Khatkhadha mineralised area
in 2008.
Drill
hole BADD006 intersected 56.7m @ 1.6% Zn and 1.1% Pb (from 99m),
including 21.3 m @ 2.4% Zn and
1.7% Pb. This confi rms that zinc-lead mineralisation at Bou Aouane is
laterally extensive. Further drilling would be required to assess the
thickness, grade and continuity of the system.
Drilling at the EL Haouaria prospect commenced in late 2007 and one
hole was completed. EHDD001 intersected 11.35m (135.65-146.4) @ 2.3%
Zn. There appears to have been little exploration away from the
outcropping mineralisation that was mined at El Haouaria. The style and
setting of mineralisation ('stratabound') are similar to Bou Aouane and
hold the potential for discovery of more substantial and higher grade
resources than recorded in the historical reports.
Continued drilling is planned on the Nefza licence for 2008 to test
the Sidi Driss, Gantra, Bou Aouane and El Haouaria prospects.
- 2,787m of drilling has been completed at the
Sidi Driss and Gantra targets, with drilling continuing at the El
Haouaria prospect.
- Numerous low grade narrow intercepts were
encountered in drillhole SDDD - 006 at Sidi Driss with the best
intersection being 5.2m @ 2.03% Zn, 1.8% Pb, from 69.8m.