MIMOSA FACT SHEET - Impala Platinum
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FACT SHEET MIMOSA
Mimosa locality map
Mimosa regional locality map
29°45'E 29°50'E
Shurugwi
20°14'S
20°14'S
Mimosa
Zvishavane
North
Hill
MIMOSA
South
Hill
0 2.5 5
Scale (km)
Wedza Mine
20°21'S
20°21'S
Far
South
Hill
29°45'E 29°50’E
Mimosa is jointly held by Implats and Sibanye-
Stillwater. Its operations are located on the Wedza
Geological Complex on the Zimbabwean Great Dyke,
150 kilometres east of Bulawayo. The operation
comprises a shallow underground mine, accessed
by a decline shaft, and a concentrator. In FY2020,
Mimosa produced 247 800 ounces 6E in
concentrate.
2
GEO L OGY
The Great Dyke is a layered complex similar to that of the Bushveld Complex. It extends
for 550 kilometres and has a maximum width of 11 kilometres. Within the Great Dyke four
geological complexes are known to contain PGM and base metal deposits. These are the
Wedza Complex (Mimosa – Sibanye-Stillwater and Implats), the Selukwe Complex (Unki –
Anglo Platinum), the Hartley Geological Complex (Hartley and Ngezi Platinum Mines – Zimplats)
and the Musengezi Complex. The Hartley Geological complex is the largest of the PGM-bearing
complexes, containing 80% of the known PGM resources in Zimbabwe. The stratigraphy is
broadly divided between a lower ultramafic and an overlying mafic sequence. The ultramafic
sequence hosts the P1 pyroxenite, which in turn hosts the economic PGM-bearing Main
Sulphide Zone (MSZ). The MSZ is generally 2 to 3 metres thick. Optimal mineralisation varies
and, in contrast to the Bushveld Complex, is often difficult to follow visually.
Mimosa has a well-defined grade profile where peak base metal and PGM values are offset
vertically, with palladium dominant at the base, platinum in the centre, and nickel towards the top.
Mineral Resources (inclusive reporting) as at 30 June 2020
Category Tonnes (Mt) Width (cm) 4E Grade (g/t)) 6E Grade (g/t) 6E (Moz)
measured 31.8 200 3.75 3.97 4.1
indicated 12.0 200 3.45 3.67 1.4
South Hill MSZ inferred 6.9 200 3.63 3.86 0.9
inferred (oxides) 4.4 200 3.40 3.62 0.5
Total 55.0 3.64 3.86 6.8
measured 18.0 200 3.48 3.68 2.1
indicated 16.3 200 3.62 3.84 2.0
North Hill MSZ inferred 1.9 200 3.52 3.73 0.2
inferred (oxides) 7.6 200 3.54 3.76 0.9
Total 43.8 3.54 3.76 5.3
measured 3.7 200 3.70 3.93 0.5
indicated 2.0 200 3.87 4.12 0.3
Far South Hill
inferred 0.0 200 3.94 4.19 0.0
MSZ
inferred (oxides) 5.9 200 3.43 3.65 0.7
Total 11.7 3.59 3.82 1.4
Overall total 110.4 3.60 3.82 13.6
Mineral Reserves as at 30 June 2020
Category Tonnes (Mt) Width (cm) 4E Grade (g/t)) 6E Grade (g/t) 6E (Moz)
proved 8.1 200 3.38 3.61 0.9
South Hill
probable 1.5 200 3.19 3.37 0.2
MSZ (Wedza)
Total 9.5 3.35 3.57 1.1
proved 10.3 200 3.61 3.89 1.3
South Hill
probable 7.8 200 3.36 3.62 0.9
MSZ (Mtshingwe)
Total 18.1 3.50 3.77 2.2
Total South Hill
27.6 3.45 3.70 3.3
Mineral Reserves
3
INTRODUCTION SCENE THE DETAILS – MINERAL RESOURCES
AND OVERVIEWINTRODUCTION
SETTING SCENE AND MINERAL RESERVES
THE DETAILS APPENDICES
– MINERAL RESOURCES
AND OVERVIEW SETTING AND MINERAL RESERVES APPENDICES
Mimosa
Mimosa
Mimosa Mimosa
– MSZ - MSZ Mimosa MSZ 6E metal ratio
Mimosa – MSZ
Mimosa
as at 30 JuneMSZ
2020 6E
Mimosa metal6Eratio
(%) MSZ metalasratio
at 30 June 2020
Q
Pt Q
Pd Q
Ni as at 30 June 2020 (%)
250 Q
Pt Q
Pd Q
Ni
200 250 Pt 46.2
150 200 Pt 46.2
100 150 Pd 36.1
Width (cm)
50 100 Pd 36.1
3.9
Width (cm)
0 50 Rh
-50 0 Rh 3.9
Ru 3.8
-100 -50
-150 Ru 3.8
-100 3.0
Ir
-200 -150
Ir 3.0
-250 -200 Au 7.0
0 -250 2 4 6 Au 7.0
0 Grade [g/t (Pt, Pd), 2% x 10 (Ni)] 4 6 0 10% 20% 30% 40% 50%
O Pyroxenite 0 10% (%) 20% 30% 40% 50%
Grade [g/t (Pt, Pd), % x 10 (Ni)]
O Pyroxenite (%)
Metal ratios derived from the Mineral Reserve estimate.
Metal ratios derived from the Mineral Reserve estimate.
Exploration 2019 with five (5) diamond drillholes from the 2018 – 2019 drilling
Exploration
The lease area has been explored by a total of 514 exploration campaign 2019being with five batch
the last (5) diamond drillholesinfrom
to be included the 2018
the solids and– 2019 drilling
The lease
core-recovering area of
drillholes haswhich
been134 explored
are onbythe a total
NorthofHill campaign
514 exploration block modelling. being the
Rounding last batch
of numbers mayto be included
result in minor in the solids and
core-recovering drillholes of which 134
deposit, 344 on the South Hill, four on Mtshingwe Fault Block and are on the North Hill computationalblock modelling.
discrepancies. Rounding
Mineral of numbers
Resource may
estimates result
arein minor
deposit,
22 on the Far South344 Hill.on
Thethearea
SouthhasHill,
alsofour
been on explored
Mtshingwe by Fault Block and computational
inherently imprecise discrepancies.
in nature. The resultsMineral Resource
tabulated estimates are
in this report
22 on the Far South Hill. The area has
surface mapping and trenching. The drillholes were drilled and also been explored by must be inherently
read as imprecise
estimates and in nature.
not as The results
calculations. tabulated
Inferred in this report
assayed oversurface mapping
a series andcampaigns
of drilling trenching. The drillholes
spanning the were must be in
life drilled and Mineral Resources read as estimates
particular anded
are qualifi notasas calculations. Inferred
approximations.
of the mine.assayed
Drill core over a seriesNQ
is largely of size
drilling campaigns
though spanning the life The MineralMineral
the unconsolidated Resource Resources
estimate in refl
particular
ects theare qualifi
actual ed asdepletion
spatial approximations.
part of the of theismine.
hole drilledDrill
HQcoresize.isAll
largely NQ size
drill holes are though
logged the unconsolidated as at 31 May The2020
MineralandResource estimate
the non-spatial reflectsdepletion
forecast the actual to spatial depletion
lithologically
MIN I N G
part
and ofgeotechnically.
the hole is drilled
lithologically and
All HQ size. Alland
lithological
geotechnically. All
verified for integrity before being imported into the database.
drill assay
holes data
lithological
are logged
and
are
assay data
30 June 2020.as atThe
31 May
main2020change andcan
thebenon-spatial
attributedforecast
to normal
mining depletion and review of Mineral Resource loss factors. to normal
are 30 June 2020. The main change can be attributed
mining depletion and review of Mineral Resource loss factors.
depletion to
verified fordrilling
Surface exploration integrity before being
continued duringimported
the past into yearthe database.
with
4 487m in Surface exploration
total drilled drillingdrillholes.
in 33 surface continued during the past year with The classification of Mineral Resources at Mimosa is informed by
4 487m in total drilled in 33 surface drillholes. The classifigeological
a matrix considering cation of Mineral Resources
complexity and theatconfi Mimosa
dence is in
informed by
a matrixestimation.
the geostatistical considering In geological
broad terms complexity
confidence andis the confidence in
derived
Mineral Resource estimation and reconciliation
Mineral from surface thedrill
geostatistical
hole spacing estimation. In broad
and this has terms weighting
the largest confidence is derived
The updated MineralResource
Resource estimatesestimation and reconciliation
are tabulated below. The
from surface drillResources:
hole spacing and this has the largest weighting
statement The updated Mineral Resource estimates Mimosa below. on
arefortabulated Theclassification of Mineral
reflects
Mimosa holds contiguous mining rights over 6 594 hectares on the North Hill, the South
statement
as at 30 June
the total Mineral
reflects Resources
2020. Mineral
Resource
the total Mineral
estimate
Resource
are quoted estimate
inclusive of for Mimosa • Drillhole on classifiless
spacing cation
than of250m
Mineral Resources:
apart supports Measured
as at 30Mineral
June 2020. Mineral Resources areforquoted • Drillhole spacing less than 250m apart supports Measured
inclusive of Mineral Resources
Mineral Reserves.
geological Mineral Hill, Mtshingwe Block and Far South Hill orebody areas. The orebody is shallow and
Reserves.
losses, while
Resource estimates
Mineral Resource
no allowance is made for
allow
estimates
estimated
anticipated •
allow for estimated Drillhole Mineral
spacing Resources
between 250m and 500m supports Indicated
geological losses,eventual
while nomining.
allowance is made for anticipated • Drillhole spacing between 250m and 500m supports Indicated
Mineral Resources
support pillar losses during Mineral Resource
grades aresupport mining commences at a depth of 150 metres below the surface and extends to a depth
quoted pillar losses
in situ. during eventual
The Mineral Resourcemining.estimates Mineral Resource • Drillhole spacing Mineralgreater
Resourcesthan 500m supports Inferred Mineral
Resources.• Drillhole spacing greater than 500m supports Inferred Mineral
have been grades are quoted
done using Surpac™ in situ. The Mineral
software Resource
using inverse estimates
distance
have of approximately 200 metres. The bord and pillar mining method is employed and stoping
been done using Surpac™ software
techniques. The estimation block model cut-off was in December using inverse distance Resources.
techniques. The estimation block model cut-off was in December
widths average around 2 metres. Mining bords advance along the strike.
Mimosa Mineral Resource estimates (inclusive reporting)
Mimosa Mineral Resource estimates (inclusive reporting)
As at 30 June 2020
The mining cycle involves mechanised support drilling and installation, mechanised face
As at 30 June 2020
Orebody South Hill MSZ North Hill MSZ Far South Hill MSZ
Orebody drilling, charging and blasting, and mechanised lashing onto a conveyor network to an
South Hill MSZ North Hill MSZ Far South Hill MSZ
Inferred Inferred Inferred
Category underground bunker. From the bunker ore is conveyed out to a surface stockpile.
Measured Indicated Inferred (Oxides) Inferred
Total Measured Indicated Inferred (Oxides) Inferred
Total Measured Indicated Inferred (Oxides) Inferred Total
Total
Category Measured Indicated Inferred (Oxides) Total Measured Indicated Inferred (Oxides) Total Measured Indicated Inferred (Oxides) Total Total
Tonnes Mt 31.8 12.0 6.9 4.4 55.0 18.0 16.3 1.9 7.6 43.8 3.7 2.0 0.0 5.9 11.7 110.4
Width Tonnes 200Mt 20031.8 20012.0 2006.9
cm 4.4 200 55.0 20018.0 20016.3 2001.9 7.6 20043.8 2003.7 2002.0 2000.0 5.9 11.7 110.4
Width 3.75cm 3.45200 3.63200 3.40200 3.64 200 3.48
4E grade g/t 3.62200 3.52200 3.54200 3.54200 3.70 3.87200 3.94200 3.43200 3.59200 3.60
4E grade3.97g/t 3.673.75 3.863.45 3.623.63 3.863.40 3.68
6E grade g/t 3.64 3.843.48 3.733.62 3.763.52 3.763.54 3.933.54 4.123.70 4.193.87 3.653.94 3.823.43 3.823.59 3.60
Ni 6E
% grade0.14g/t 0.153.97 0.153.67 0.123.86 0.143.62 0.14 3.86 0.163.68 0.143.84 0.143.73 0.153.76 0.143.76 0.153.93 0.164.12 0.134.19 0.143.65 0.143.82 3.82
Cu Ni
% 0.11 % 0.110.14 0.120.15 0.110.15 0.110.12 0.10 0.14 0.120.14 0.100.16 0.110.14 0.110.14 0.110.15 0.110.14 0.110.15 0.100.16 0.110.13 0.110.14 0.14
4E oz Cu
Moz 3.8 % 1.30.11 0.80.11 0.50.12 6.40.11 2.0 0.11 1.90.10 0.20.12 0.90.10 5.00.11 0.40.11 0.20.11 0.00.11 0.70.11 1.40.10 12.80.11 0.11
6E oz 4E oz 4.1
Moz Moz 1.43.8 0.91.3 0.50.8 6.8 0.5 2.16.4 2.02.0 0.21.9 0.90.2 5.30.9 0.55.0 0.30.4 0.00.2 0.70.0 1.40.7 13.61.4 12.8
Pt oz 6E
Moz oz Moz
1.9 0.6 4.1 0.4 1.4 0.2 0.9 3.2 0.5 1.06.8 0.92.1 0.12.0 0.40.2 2.50.9 0.25.3 0.10.5 0.00.3 0.30.0 0.70.7 6.31.4 13.6
4 Pd oz Pt oz
Moz Moz 0.51.9 0.30.6 0.20.4 2.5 0.2 0.83.2 0.71.0 0.10.9 0.30.1 1.90.4 0.22.5 0.10.2 0.00.1 0.20.0 0.50.3 4.90.7
1.5
Pd oz Moz 1.5 0.5 0.3 0.2 2.5 0.8 0.7 0.1 0.3 1.9 0.2 0.1 0.0 0.2 0.5
6.3
4.9
SU S TA I N A B L E
M E TA L L U R G Y
DEV E L O P M E N T
Mimosa remains committed to social Mimosa has a concentrator plant on
development initiatives and engages site where initial processing is done.
in, develops and builds community Concentrate is transported by road to
relationships. It takes responsibility for Impala’s Mineral Processes facility in
economic, social and environmental South Africa in terms of a life-of-mine
issues that impact its people, offtake agreement with Impala
communities and environments and Refining Services (IRS). Discussions
is involved in a number of community continue with the Government of
projects in the area. Zimbabwe regarding beneficiation.
The implementation of a 15% export
levy on unbeneficiated platinum was
deferred to end 2022.
INDI GE N I S AT I O N
The Government of Zimbabwe has been pursuing greater participation in the mining
sector by indigenous Zimbabweans. The company continues to engage with the
government with respect to plans in this regard.
5
HIST O R Y
Mimosa was acquired by Zimasco from Union Carbide in 1993. Zimasco piloted
platinum mining in Zimbabwe by resuscitating the operation and steadily increasing
production to 1 000 tonnes per day achieved in 1998. In July 2001, Implats acquired
a 35% stake in Mimosa for R246 million. This stake was increased to 50% with a further
acquisition of 15% in August of the following year. Aquarius acquired a 50% stake in
Mimosa during the same year. In 2016 Sibanye-Stillwater acquired all the shares that
formerly belonged to Aquarius.
6
mimosa – k ey statistics
Mimosa – KEY STATISTICS FY2020 FY2019
Production
Tonnes milled ex mine (000t) 2 701 2 814
Headgrade (6E) (g/t) 3.85 3.83
6E in concentrate (000oz) 248 122.1
Labour efficiency
Tons milled per employee
(t/man/annum) 1 170 1 220
costed*
Cost
Mining cost of sales (Rm) (3 494) (3 675)
On-mine operations (Rm) (2 168) (1 996)
Processing operations (Rm) (720) (679)
Other (Rm) (606) (1 000)
Total cost (Rm) 2 982 2 852
(US$m) 190 201
Unit costs
(R/t) 1 104 1 014
per tonne milled
(US$/t) 70 71
per 6E ounce (R/oz) 12 034 10 944
in concentrate (US$/oz) 768 771
Financial ratios
Gross margin ex mine (%) 34.8 17.4
Capital expenditure
(Rm) 679 693
(US$m) 43 49
Safety
LTIFR (pmmhw+) 0.50 0.53
FIFR (pmmhw+) – 0.11
Labour complement
Own employees (no) 1 291 1 338
Contractors (no) 2 231 1 009
+ Per million man hours worked
* Average working cost employees including contractors
7CONTACT DETAILS
HEAD OFFICE
2 Fricker Road, Illovo, 2196
Private Bag X18, Northlands, 2116
Tel: +27 (11) 731 9000
E-mail: investor@implats.co.za
www.implats.co.za
Group Executive: Corporate Affairs
Johan Theron
Tel: +27 (11) 731 9013
E-mail: johan.theron@implats.co.za
Executive: Corporate Affairs
Emma Townshend
Tel: +27 (21) 794 8345
E-mail: emma.townshend@implats.co.za
Group Head: Corporate
Communications
Alice Lourens
Tel: +27 (11) 731 9033
E-mail: alice.lourens@implats.co.za
DECEMBER 2020You can also read
