MIMOSA FACT SHEET - Impala Platinum
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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 7
CONTACT 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 2020
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