Page 22 - Sundance Resources Ltd Annual Report 2013

20 SUNDANCE RESOURCES LIMITED ANNUAL REPORT 2013
Figure 3: Open Pit designs for Mbarga (left) and Nabeba
Iron Mineral Resources
The Iron Mineral Resource categories are separated
into two distinct types of Hematite mineralisation:
1) High-Grade Hematite Resources (and Reserves) –
These are the near-surface High-Grade Hematite
deposits often referred to as ‘DSO’ due to their
relative simplicity of mining, processing and
transport. Iron grades for this category are typically
between 50-65% Fe and average above 55% Fe
for a defined mineralised domain. The High-Grade
Hematite domains are situated within the near-
Only those High-Grade Hematite Resources estimated
in the Indicated category (748.0Mt @57.2% Fe) have
been made available for consideration of conversion to
Mineral Reserves.
AMC have provided detailed open pit designs at both
Mbarga and Nabeba, which have allowed preliminary
ground works to commence on Site for preparation of
various infrastructure facilities.
surface Supergene profile which
extends from outcropping occurrences to
depths of up to 100m below surface.
2) Itabirite Hematite Resources (Itabirite Reserves
not yet estimated) – These are the lower iron
grade primary rocks directly underlying the above
mentioned High-Grade Hematite Resources. Iron
grades range between 30-50% Fe and there
is high silica content. This means that product
derived from this Itabirite material will require
beneficiation to extract a concentrated product
with acceptable low impurity (silica) content for
customers.
3) The Itabirite rocks at the Mbalam-Nabeba Iron
Ore Project are what are typically referred to
elsewhere as ‘enriched’ and almost entirely made
up of pure hematite and silica, meaning they are
very amenable to processing to separate the iron
product from the silica waste using well-proven
processing technologies, namely, reverse flotation.