TIDMBSE
AIM and Media Release
13 August 2020
BASE RESOURCES LIMITED
2020 Mineral Resources and Ore Reserves Statement
Key Points
* Maiden Ranobe Ore Reserves estimate for the Toliara Project announced on 6
December 2019 of 586Mt at an average HM grade of 6.5% containing 38Mt of
in-situ HM.
* Kwale South Dune Mineral Resources and Ore Reserves estimates were reduced
by mining depletion in the year to 30 June 2020, as well as by a 5%
reduction in the estimated material bulk density, sterilisation of
sub-economic material and a reduction in the size of the prospecting
licence omitting some low-grade material, with the total effect of:
+ Reducing the South Dune Mineral Resources by 38Mt containing 1.1Mt of
in situ HM.
+ Reducing the South Dune Ore Reserves by 22Mt containing 0.9Mt of in
situ HM.
The 2020 Mineral Resources and Ore Reserves estimates for Base Resources
Limited (ASX & AIM: BSE) (Base Resources or the Company) are summarised in the
table below together with the 2019 Mineral Resources and Ore Reserves estimates
for comparison.
2020 2019
as at 30 June 2020 as at 30 June 2019
HM Assemblage HM Assemblage
Tonnes HM HM SL OS Tonnes HM HM SL OS
Deposit ILM RUT LEUC ZIR ILM RUT ZIR
(Mt) (Mt) (%) (%) (%) (%) (%) (%) (%) (Mt) (Mt) (%) (%) (%) (%) (%) (%)
Mineral Resources (Measured + Indicated + Inferred, inclusive of Ore Reserves)
Kwale 246 4.9 2.0 34 2 51 13 5 285 6.0 2.1 33 2 52 13 6
-
Ranobe 1,293 66 5.1 6 0 72 2* - 6 1,293 66 5.1 6 0 72 2 6
Ore Reserves (Proved + Probable)
Kwale 40 1.4 3.4 26 1.7 57 13 6 62 2.3 3.8 27 3 57 13 6
-
Ranobe 586 38 6.5 3.9 0.1 74 1.1 0.9^ 5.9 - - - - - - - -
Table subject to rounding differences. *Rutile reported is rutile + leucoxene
mineral species. ^ Recovered Leucoxene will be split between Rutile and
Chloride Ilmenite products depending on product specification requirements.
Mineral Resources and Ore Reserves estimates in this statement are reported in
accordance with the JORC Code (2012 edition). Accordingly, this statement
should be read in conjunction with the respective explanatory Mineral Resources
and Ore Reserves information included in the following announcements1:
Deposit Announcement Title Estimate Date Release
Date
Kwale South Mineral Updated Kwale South Dune 31 March 2020 27 July
Dune Resources & Mineral Resources and Ore 2020
Ore Reserves Reserves estimate
Kwale North Mineral Mineral Resource for Kwale 1 May 2019 1 May 2019
Dune Resources North Dune deposit
Ranobe Ore Reserves Maiden Ranobe Ore Reserves 27 November 6 December
Estimate 2019 2019
Ranobe Mineral Updated Ranobe Deposit Mineral 23 January 23 January
Resources Resources (corrected) 2019 2019
2019 Mineral 2019 Mineral Resources and Ore 30 June 2019 21 August
Comparatives Resources & Reserves Statement 2019
Ore Reserves
[Note (1): ASX announcements are available at https://baseresources.com.au/
investors/announcements/.]
Kwale Deposits
The Company's 100% owned Kwale Mineral Sands Operations (Kwale Operations) in
Kenya is located approximately 50 kilometres south of Mombasa and 10 kilometres
inland from the Kenyan coast. The Company's wholly owned subsidiary, Base
Titanium Limited, holds Prospecting Licence 2018/0119 (PL119) which hosts the
Kwale South Dune and North Dune deposits. The majority of the Kwale South Dune
deposit resides within Special Mining Lease No. 23 (SML23), which sits within
PL119 and is currently being mined. A pre-feasibility study is currently
underway to assess the potential to mine the North Dune deposit.
Base Resources is the operator of Kwale Operations and has a net attributable
interest of 100% in the 2020 Kwale Mineral Resources and Ore Reserves
estimates.
Mineral Resources
The 2020 Kwale Mineral Resources, as at 30 June 2020, are estimated to be 246
million tonnes (Mt) at an average heavy mineral (HM) grade of 2.0% for 4.9Mt of
contained HM, at a 1% HM cut-off grade.
Table 2: 2020 Kwale Mineral Resources estimate compared with the 2019 estimate
at a 1% HM cut-off grade.
2020 2019
as at 30 June 2020 as at 30 June 2019
HM Assemblage HM Assemblage
Tonnes HM HM SL OS Tonnes HM HM SL OS
Category ILM RUT ZIR ILM RUT ZIR
(Mt) (Mt) (%) (%) (%) (%) (%) (%) (Mt) (Mt) (%) (%) (%) (%) (%) (%)
Kwale South Dune
Measured 55 1.8 3.2 24 1 58 14 6 81 2.6 3.2 25 1 59 14 6
Indicated 20 0.6 2.9 26 7 52 12 6 33 0.8 2.5 26 7 52 12 6
Total 76 2.3 3.1 25 3 57 13 6 114 3.5 3.0 25 3 56 13 6
Kwale North Dune
Indicated 136 2.1 1.5 38 2 45 12 5 136 2.1 1.5 38 2 45 12 5
Inferred 34 0.5 1.4 36 3 46 13 6 34 0.5 1.4 36 3 46 13 6
Total 171 2.6 1.5 38 2 45 12 5 171 2.6 1.5 38 2 45 12 5
Total Kwale Mineral Resources
Measured 55 1.8 3.2 24 1 58 14 6 81 2.6 3.2 25 1 59 14 6
Indicated 157 2.7 1.7 37 2 47 12 5 169 2.9 1.7 36 3 47 12 5
Inferred 34 0.5 1.4 36 3 46 13 6 34 0.5 1.4 36 3 46 13 6
Total 246 4.9 2.0 34 2 51 13 5 285 6.0 2.1 33 2 52 13 6
Table subject to rounding differences. Mineral Resources are inclusive of
Kwale South Dune Ore Reserves.
The 2020 Kwale Mineral Resources estimate represents a decrease of 13.5% in
material tonnes and 18.5% in contained HM tonnes when compared with the 2019
Kwale Mineral Resources estimate.
The decrease was solely to the Kwale South Dune Mineral Resources which are
estimated to be 76Mt at an average HM grade of 3.1% for 2.3Mt of contained HM
as at 30 June 2020, a decrease of 38Mt containing 1.1Mt of HM to the 2019
estimate. The decrease was due to:
* Mining depletion, decreasing material by 18.5Mt containing 0.67Mt of HM.
* Mining sterilisation of 12.0Mt of material and 0.25Mt of contained HM
comprising material that was not mined as it was not considered economic to
do so.
* A 5% reduction in the estimated material bulk density, decreasing material
by 5.7Mt containing 0.17Mt of HM compared to the 2019 estimate.As announced
on 27 July 20202, the reduction in estimated material bulk density was the
result of routine reconciliations undertaken between the resource model
predictions and run-of-mine operating data gained for ore mined since
mining commenced on the Kwale South Dune in July 2019.
* A prospecting licence area reduction, decreasing material by 2.2Mt
containing 0.03Mt of HM. The previous prospecting tenure instrument,
Special Prospecting Licence 173, which was granted under the previous
Kenyan Mining Act, was converted to PL119 in May 2018, which was granted
under the 2016 Kenyan Mining Act, requiring a 50% reduction in size.
Material excluded by the reduction was not considered economic.
The Kwale North Dune Mineral Resources as at 30 June 2020 are unchanged from
the 2019 estimate.
[Note (2): Refer to Base Resources' market announcement "Updated Kwale South
Dune Mineral Resources and Ore Reserves estimate" released on 27 July 2020,
which is available at https://baseresources.com.au/investors/announcements/.]
Ore Reserves
Contained within the Kwale South Dune Mineral Resources are the Kwale Ore
Reserves, estimated as at 30 June 2020 to be 40Mt at an average HM grade of
3.4% for 1.4Mt of contained HM.
Table 3: The 2020 Kwale Ore Reserves estimate compared with the 2019 estimate.
2020 2019
as at 30 June 2020 as at 30 June 2019
HM Assemblage HM Assemblage
Tonnes HM HM SL OS Tonnes HM HM SL OS
Category ILM RUT ZIR ILM RUT ZIR
(Mt) (Mt) (%) (%) (%) (%) (%) (%) (Mt) (Mt) (%) (%) (%) (%) (%) (%)
Kwale South Dune
Proved 35 1.2 3.5 26 0.8 58 14 6 39 1.6 4.0 27 1 59 14 6
Probable 5 0.2 2.9 27 7 51 12 5 23 0.8 3.3 26 5 53 13 6
Total 40 1.4 3.4 26 1.7 57 13 6 62 2.3 3.8 27 3 57 13 6
Table subject to rounding differences.
The 2020 Kwale Ore Reserves estimate represents a decrease of 35% in total ore
tonnes and 41% in contained HM tonnes compared to the 2019 Kwale Ore Reserves
estimate. This decrease was due to:
* Mining depletion, decreasing ore by 18.3Mt containing 0.68Mt of HM.
* A 5% reduction in the estimated material bulk density of the resource
model, decreasing ore by 3.1Mt containing 0.11Mt of HM.
* Other minor changes, including updates to the resource model (other than
for material bulk density), altering the mine design to reflect the switch
from dozer mining to hydraulic mining and sterilisation of ore, resulting
in total reduction in ore of 0.16Mt containing 0.16Mt of HM.
The estimated material and contained HM tonnes for the 2020 Kwale South Dune
Mineral Resources are significantly higher than the 2020 Kwale South Dune Ore
Reserves estimate because the Ore Reserves are constrained within SML23,
whereas the Mineral Resources are constrained within the much larger PL119.
Mining tenure arrangements are being progressed with the Kenyan Ministry of
Petroleum and Mining to extend the SML23 boundary to incorporate some of these
additional Mineral Resources as a precursor to an anticipated updated Ore
Reserves estimate.
No Ore Reserves estimate has been completed for the Kwale North Dune deposit.
Ranobe Deposit
The Company's 100% owned Toliara Project is based on the Ranobe deposit,
located approximately 45 kilometres north of the town of Toliara and 15km
inland from the coast in south west Madagascar. The Ranobe deposit sits within
Permis d'Exploitation 37242, which is a mining lease under Malagasy law. The
Company is currently progressing the project towards development, with a
definitive feasibility study completed in December 20193.
Base Resources is the operator of the Toliara Project and has a net
attributable interest of 100% in the 2020 Ranobe Mineral Resources and Ore
Reserves estimates.
[Note (3): Refer to Base Resources' market announcement "DFS reinforces
Toliara Project's status as a world class mineral sands development" released
on 12 December 2019, which is available at https://baseresources.com.au/
investors/announcements/.]
Mineral Resources
The 2020 Ranobe Mineral Resources are estimated to be 1,293Mt at an average HM
grade of 5.1% for 66Mt of contained HM, based on a 1.5% HM cut-off grade. The
Ranobe Mineral Resources at 30 June 2020 are unchanged from the 2019 estimate.
Table 4: The 2020 Ranobe Mineral Resources estimate, compared with the 2019
estimate, at a 1.5% HM cut-off grade.
2020 2019
as at 30 June 2020 as at 30 June 2019
In HM Assemblage In HM Assemblage
Material Situ HM SL OS Material Situ HM SL OS
Category HM HM
ILM RUT* ZIR ILM RUT* ZIR
(Mt) (Mt) (%) (%) (%) (%) (%) (%) (Mt) (Mt) (%) (%) (%) (%) (%)
Ranobe Mineral Resources
Measured 419 28 6.6 4 0 75 2 6 419 28 6.6 4 0 75 2 6
Indicated 375 18 4.9 8 1 72 2 6 375 18 4.9 8 1 72 2 6
Inferred 499 20 3.9 7 1 70 2 5 499 20 3.9 7 1 70 2 5
Total 1,293 66 5.1 6 0 72 2 6 1,293 66 5.1 6 0 72 2 6
Table subject to rounding differences. Mineral Resources are inclusive of
Ranobe Ore Reserves. * Rutile reported in the table is rutile + leucoxene
mineral species.
Ore Reserves
Contained within the Ranobe Mineral Resources are the Ranobe Ore Reserves,
estimated as at 30 June 2020 to be 586Mt at an average HM grade of 6.5% for
38Mt of contained HM. The Ranobe Ore Reserves estimate as at 30 June 2020 are
unchanged from the maiden estimate announced on 6 December 20194.
Table 5: The 2020 Ranobe Ore Reserves estimate.
2020 2019
as at 30 June 2020 as at 30 June 2020
Deposit Tonnes HM HM SL OS HM Assemblage Tonnes HM HM SL OS HM Assemblage
ILM RUT LEUC ZIR ILM RUT LEUC ZIR
(Mt) (Mt) (%) (%) (%) (%) (%) (%) (%) (Mt) (Mt) (%) (%) (%) (%) (%) (%) (%)
Ranobe Ore Reserves
Proved 347 24 7.0 3.8 0.1 75 1.0 1.0 5.9 N/A
Probable 239 14 5.8 4.2 0.2 73 1.3 0.8 5.7 N/A
Total 586 38 6.5 3.9 0.1 74 1.1 0.9^ 5.9 N/A
Table subject to rounding differences. ^ Recovered Leucoxene will be split
between Rutile and Chloride Ilmenite products depending on product
specification requirements.
[Note (4): Refer to Base Resources' market announcement "Maiden Ranobe Ore
Reserves Estimate" released on 6 December 2019, which is available at https://
baseresources.com.au/investors/announcements/.]
Mineral Resources and Ore Reserves Governance
A summary of the governance, internal controls and estimation process
applicable to Base Resources' Mineral Resources and Ore Reserves estimates are
as follows:
Mineral Resources
* Review and validation of drilling and sampling methodology and data
spacing, geological logging, data collection and storage, sampling and
analytical quality control.
* Geological interpretation - review of known and interpreted structure,
lithology and weathering controls.
* Estimation methodology - relevant to mineralisation style and proposed
mining methodology.
* Comparison of estimation results with previous mineral resources models,
and with results using alternate modelling methodologies.
* Visual validation of block model against raw composite data.
* Use of external competent persons to assist in preparation of Mineral
Resources estimate updates.
Ore Reserves
* Review of potential mining methodology to suit deposit and mineralisation
characteristics.
* Review of potential Modifying Factors, including cost assumptions and
commodity prices to be utilised in mining evaluation.
* Ore Reserves estimate updates initiated with material changes in the above
assumptions.
* Optimisation using appropriate software packages for open pit evaluation.
* Design based on optimisation results.
* Use of external competent persons to assist in preparation of Ore Reserves
estimates.
Competent Persons' Statements
The 2020 Mineral Resources and Ore Reserves Statement has been approved by the
following competent persons on the basis detailed below:
Mineral Resources - South Dune Deposit
The information in this announcement that relates to the Kwale South Dune
Mineral Resources estimate is based on, and fairly represents, information and
supporting documentation prepared by Mr. Scott Carruthers. Mr. Carruthers is a
Member of The Australasian Institute of Mining and Metallurgy. Mr. Carruthers
is employed by Base Resources, he holds equity securities in Base Resources,
and is entitled to participate in Base Resources' long-term incentive plan and
receive equity securities under that plan. Details about that plan are
included in Base Resources' 2019 Annual Report. Mr. Carruthers has sufficient
experience that is relevant to the style of mineralisation and type of deposits
under consideration and to the activity which he is undertaking to qualify as a
Competent Person as defined in the JORC Code and as a qualified person for the
purposes of the AIM Rules for Companies. Mr. Carruthers has reviewed this
announcement and consents to the inclusion in this announcement of the Kwale
South Dune Mineral Resources estimate and supporting information in the form
and context in which the relevant information appears.
Mineral Resources - North Dune Deposit
The information in this announcement that relates to Kwale North Dune Mineral
Resources estimate is based on, and fairly represents, information and
supporting documentation prepared by Mr. Greg Jones, who acts as a Consultant
Geologist for Base Resources and is employed by IHC Robbins. Mr. Jones is a
Member of The Australasian Institute of Mining and Metallurgy and has
sufficient experience that is relevant to the style of mineralisation and type
of deposits under consideration and to the activity which he is undertaking to
qualify as a Competent Person as defined in the JORC Code and as a qualified
person for the purposes of the AIM Rules for Companies. Mr. Jones has reviewed
this announcement and consents to the inclusion in this announcement of the
Kwale North Dune Mineral Resources estimate and supporting information in the
form and context in which it appears.
Ore Reserves - South Dune Deposit
The information in this announcement that relates to the Kwale South Dune Ore
Reserves estimate is based on, and fairly represents, information and
supporting documentation prepared by Mr. Per Scrimshaw and Mr. Scott
Carruthers. Mr. Scrimshaw and Mr. Carruthers are both Members of The
Australasian Institute of Mining and Metallurgy. Mr. Scrimshaw is employed by
Entech, a mining consultancy engaged by Base Resources. Mr. Carruthers is
employed by Base Resources, he holds equity securities in Base Resources, and
is entitled to participate in Base Resources' long-term incentive plan and
receive equity securities under that plan. Details about that plan are
included in the Company's 2019 Annual Report. Mr. Scrimshaw and Mr. Carruthers
each have sufficient experience that is relevant to the style of mineralisation
and type of deposits under consideration and to the activity which they are
each undertaking to qualify as Competent Persons as defined in the JORC Code
and as qualified persons for the purposes of the AIM Rules for Companies. Mr.
Scrimshaw and Mr. Carruthers have each reviewed this announcement and consent
to the inclusion in this announcement of the South Dune Ore Reserves estimate
and supporting information in the form and context in which it appears.
Mineral Resources - Ranobe Deposit
The information in this announcement that relates to the Ranobe Mineral
Resources estimate is based on, and fairly represents, information and
supporting documentation prepared by Mr. Greg Jones, who acts as Consultant
Geologist for Base Resources and is employed by IHC Robbins. Mr. Jones is a
Member of The Australasian Institute of Mining and Metallurgy and has
sufficient experience that is relevant to the style of mineralisation and type
of deposits under consideration and to the activity which he is undertaking to
qualify as a Competent Person as defined in the JORC Code and as a qualified
person for the purposes of the AIM Rules for Companies. Mr. Jones has reviewed
this announcement and consents to the inclusion in this announcement of the
Ranobe Mineral Resources estimate and supporting information in the form and
context in which it appears.
Ore Reserves - Ranobe Deposit
The information in this announcement that relates to Ranobe Ore Reserves
estimate is based on, and fairly represents, information and supporting
documentation prepared by Mr. Chris Sykes and Mr. Scott Carruthers. Mr. Sykes
and Mr. Carruthers are both members of The Australasian Institute of Mining and
Metallurgy. Mr. Sykes acts as a Consultant Mining Engineer for Base
Resources. Mr. Carruthers is employed by Base Resources, he holds equity
securities in Base Resources, and is entitled to participate in Base Resources'
long-term incentive plan and receive equity securities under that plan.
Details about that plan are included in the Company's 2019 Annual Report.
Both Mr. Sykes and Mr. Carruthers have sufficient experience that is relevant
to the style of mineralisation and type of deposits under consideration and to
the activity which they are each undertaking to qualify as a Competent Person
as defined in the JORC Code and as qualified persons for the purposes of the
AIM Rules for Companies. Mr. Sykes and Mr. Carruthers have each reviewed this
announcement and consent to the inclusion in this announcement of the Ranobe
Ore Reserves estimate and the supporting information in the form and context in
which the relevant information appears.
Glossary
Assemblage The relative proportion of valuable heavy mineral components of ilmenite,
rutile, zircon and, where applicable, leucoxene.
Competent The JORC Code requires that a Competent Person must be a Member or Fellow
Person of The Australasian Institute of Mining and Metallurgy, or of the
Australian Institute of Geoscientists, or of a 'Recognised Professional
Organisation'. A Competent Person must have a minimum of five years'
experience working with the style of mineralisation or type of deposit
under consideration and relevant to the activity which that person is
undertaking.
Cut-off grade The lowest grade of mineralised material that is thought to be
economically mineable and available. Typically used by Base Resources to
define which material is reported in a Mineral Resource estimate.
Grade A physical or chemical measurement of the characteristics of the material
of interest. In this context, the grade is always a percentage and the
characteristics are heavy mineral, oversize, slime and the various product
minerals (ilmenite, rutile etc).
Heavy mineral In mineral sands, minerals with a specific gravity greater than 2.85 t/m3.
ILM Ilmenite, a valuable heavy mineral.
Indicated An Indicated Mineral Resource is that part of a Mineral Resource for which
Resource quantity, grade (or quality), densities, shape and physical
characteristics are estimated with sufficient confidence to allow the
application of Modifying Factors in sufficient detail to support mine
planning and evaluation of the economic viability of the deposit.
Inferred An Inferred Mineral Resource is that part of a Mineral Resource for which
Resource quantity and grade (or quality) are estimated on the basis of limited
geological evidence and sampling. Geological evidence is sufficient to
imply but not verify geological and grade (or quality) continuity. It is
based on exploration, sampling and testing information gathered through
appropriate techniques from locations such as outcrops, trenches, pits,
workings and drill holes.
JORC Code The 2012 Edition of the Australasian Code for Reporting of Exploration
Results, Mineral Resources and Ore Reserves, as published by the Joint Ore
Reserves Committee of The Australasian Institute of Mining and Metallurgy,
Australian Institute of Geoscientists and Minerals Council of Australia.
LEUC Leucoxene, a valuable heavy mineral.
Measured A Measured Mineral Resource is that part of a Mineral Resource for which
Resources quantity, grade (or quality), densities, shape, and physical
characteristics are estimated with confidence sufficient to allow the
application of Modifying Factors to support detailed mine planning and
final evaluation of the economic viability of the deposit.
Modifying Modifying Factors are considerations used to convert Mineral Resources to
Factors Ore Reserves. These include, but are not restricted to, mining,
processing, metallurgical, infrastructure, economic, marketing, legal,
environmental, social and governmental factors.
Mineral Mineral Resources are a concentration or occurrence of solid material of
Resources economic interest in or on the Earth's crust in such form, grade (or
quality), and quantity that there are reasonable prospects for eventual
economic extraction. The location, quantity, grade (or quality),
continuity and other geological characteristics of a Mineral Resource are
known, estimated or interpreted from specific geological evidence and
knowledge, including sampling. Mineral Resources are sub-divided, in
order of increasing geological confidence, into Inferred, Indicated and
Measured categories.
Ore Reserves Ore Reserves are those portions of Mineral Resources that, after the
application of all Modifying Factors, result in an estimated tonnage and
grade which, in the opinion of the Competent Person making the estimates,
can be the basis of a technically and economically viable project, after
taking account of material relevant Modifying Factors.
OS Oversize material.
Probable A Probable Ore Reserve is the economically mineable part of an Indicated,
Reserve and in some circumstances, a Measured Mineral Resource. The confidence in
the Modifying Factors applying to a Probable Ore Reserve is lower than
that applying to a Proved Ore Reserve.
Proved Reserve A Proved Ore Reserve is the economically mineable part of a Measured
Mineral Resource. A Proved Ore Reserve implies a high degree of confidence
in the Modifying Factors.
RUT Rutile, a valuable heavy mineral.
SL Slimes, being a waste product from the processing of mineral sands.
ZIR Zircon, a valuable heavy mineral.
ENDS.
For further information contact:
James Fuller, Manager Communications and Investor UK Media Relations
Relations
Base Resources Tavistock Communications
Tel: +61 (8) 9413 7426 Jos Simson and Barnaby Hayward
Mobile: +61 (0) 488 093 763 Tel: +44 (0) 207 920 3150
Email: jfuller@baseresources.com.au
About Base Resources
Base Resources is an Australian based, African focused, mineral sands producer
and developer with a track record of project delivery and operational
performance. The company operates the established Kwale Operations in Kenya
and is developing the Toliara Project in Madagascar. Base Resources is an ASX
and AIM listed company. Further details about Base Resources are available at
www.baseresources.com.au
PRINCIPAL & REGISTERED OFFICE
Level 1, 50 Kings Park Road
West Perth, Western Australia, 6005
Email: info@baseresources.com.au
Phone: +61 (0)8 9413 7400
Fax: +61 (0)8 9322 8912
NOMINATED ADVISOR
RFC Ambrian Limited
Stephen Allen
Phone: +61 (0)8 9480 2500
BROKER
Berenberg
Matthew Armitt / Detlir Elezi
Phone: +44 20 3207 7800
END
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