Page 40 - Sundance Resources Ltd Annual Report 2013

38 SUNDANCE RESOURCES LIMITED ANNUAL REPORT 2013
COMPETENT PERSONS
STATEMENT
Itabirite Resources reported at the Mbarga Deposit
(Republic of Cameroon) and at the Nabeba Deposit
(Republic of Congo)
At Mbarga, the estimated quantity and grade of Itabirite-style
mineralisation has been restricted to the area currently covered
by drilling on a 100m x 50m pattern for the Indicated Resource
and a 200m x 100m spaced drill pattern applies for the Inferred
Resource. This is represented by an area approximately 3km
(east-west) x 3km (north-south) on the Mbarga Deposit.
At Nabeba, drilling of the Itabirite has been conducted on an
approximate 400m x 200m spaced pattern and as such is only
categorised at Inferred. Recent drilling of the Itabirite at Nabeba
has been by way or re-entering and extending historical holes.
However, all deep holes across the Deposit area that intersected
Itabirite have been used in the estimation and this covers an area
approximately 3km (east-west) x 3km (north-south).
Grade has been estimated by Ordinary Kriging on composited
sample results. A digital terrain surface (based on highly accurate
topographic data), has been used to limit extrapolation of
the mineralisation to the topography of the relevant deposits.
A number of mineralisation and waste domains have been
modelled as either a digital terrain surface or as wireframes and
used to constrain the grade interpolation. The Itabirite resource
modelling has used 20m (X) x 10m (Y) x 10m (Z) blocks at the
Mbarga Deposit with sub-blocks to honour the constraining
surfaces. Nabeba Itabirite modelling has applied 25m (X) x 25m
(Y) x 5m (Z) blocks at this Inferred stage of estimation.
Drillhole collar survey has utilised DGPS surveying at all Deposits.
Down-hole surveys (at Mbarga only) were determined using either
deviation or gyro survey data. Down-hole geophysical logging
including density, gamma, resistivity and caliper logs has been
used in the evaluation at Mbarga only. Density values of 3.26
t/m3 have been assigned for the Mbarga Itabirite and 2.90 t/m3
for the Nabeba Itabirite.
Core and sample recovery has been recorded during logging.
All drill hole data is stored in an acQuire database and imported
data is fully validated. Assaying QA/QC was undertaken using
field duplicates, laboratory replicates and standards with
comprehensive reporting on laboratory precision and accuracy.
Metallurgical test work programs have supported the assay
grades and density values of the major mineral types.
High-Grade Hematite Resources reported on Exploration
Permit 92, Republic of Cameroon (Mbarga, Mbarga
South and Metzimevin Deposits)
The estimated quantity and grade of High-Grade Hematite
quality Supergene mineralisation and underlying Itabirite-style
mineralisation has been restricted to the area currently covered
by drilling on a 100m x 50m pattern for the Indicated Resource
at Mbarga Deposit and a spacing varying from 200m x 100m
to 50m x 50m for the Indicated Resource at the Mbarga South
Deposit. A 200m x 100m drill pattern applies for the Inferred
Resource at the Mbarga and Metzimevin Deposits. This is
represented by an area approximately 3km (east-west) x 3km
(north-south) on the Mbarga Deposit; by an area approximately
1.5km (east-west) and 1.0km (north-south) on the Mbarga South
Deposit and 1.2km (east-west) x 0.3km (north-south) on the
Metzimevin Deposit. Grade has been estimated by Ordinary
Kriging on composited sample results.
Note that Cut-off grades for High-Grade Hematite at the Mbarga
Deposits have been changed since the previous estimation
(September, 2011) and while most restrictions have been
removed, the following still apply: ‘Phosphorus’ Domain: >50%
Fe and <0.3% P; ‘Hypogene’ Domains: >51% Fe. Metzimevin
Inferred Resources remain unchanged and have a >50% Fe
cut-off and density of 2.80 applied.
A digital terrain surface (based on highly accurate topographic
data), has been used to limit extrapolation of the mineralisation
to the topography of the relevant deposits. A number of
mineralisation and waste domains have been modelled as either
a digital terrain surface or as wireframes and used to constrain
the grade interpolation. The resource modelling has used a block
size of 10m (X) by 10m (Y) by 2m (Z).
Drillhole collar survey has utilised DGPS surveying at all Deposits.
Down-hole surveys were determined using either deviation or
gyro survey data. Down-hole geophysical logging including
density, gamma, resistivity and caliper logs has been used in
the evaluation.
Densities have been assigned from a combination of down
hole geophysical and physical measurements of diamond core
carried out as part of metallurgical analysis. Densities of 2.40
t/m3 have been assigned for the Surficial Zone, 2.80 t/m3 for
the Supergene, 2.80 t/m3 for the Phosphorus, 2.90 t/m3 for
the Transition and 3.20 t/m3 for the Hypogene.
Core and sample recovery has been recorded during logging.
All drill hole data is stored in an acQuire database and imported
data is fully validated. Assaying QA/QC was undertaken using
field duplicates, laboratory replicates and internal standards with
comprehensive reporting on laboratory precision and accuracy.
Metallurgical test work programs have supported the assay
grades and density values of the major mineral types
High Grade Hematite Resources reported on Nabeba-
Bamegod Permit, Republic of Congo (Nabeba, Nabeba
Northwest and Nabeba South Deposits)
The estimated quantity and grade of near-surface, High-Grade
Hematite mineralisation for the Nabeba Resources has been
restricted to an area currently covered by drilling on
The information in this report that relates to Exploration Results and Mineral Resources is based on information
compiled by Mr Robin Longley, a Member of the Australian Institute of Geoscientists, and Mr Lynn Widenbar, a
member of the Australasian Institute of Mining and Metallurgy. Mr Longley and Mr Widenbar are consultants to
Sundance and have sufficient experience which is relevant to the style of mineralisation and type of Deposit and
to the activity which they are undertaking to qualify as a Competent Person as defined in the 2004 Edition of the
“Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves”.
The information in this report that relates to Ore Reserves is based on information compiled by Mr Bruce Gregory,
a member of the Australasian Institute of Mining and Metallurgy. Mr Gregory is employed by AMC Consultants
Pty Ltd and is a consultant to the Company. Mr Gregory has sufficient experience which is relevant to the style of
mineralisation and type of Deposit and to the activity which he is undertaking to qualify as a Competent Person
as defined in the 2004 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources
and Ore Reserves”.
Messrs Longley, Widenbar and Gregory consent to the inclusion in this report of the matters based on their
information in the form and context in which it appears.
For more information including modelling parameters and details, the ASX announcements pertaining to
Exploration Results, Mineral Resources and Ore Reserves are available from the Company’s website:
www.sundanceresources.com.au