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Resources and Reserves

Sibanye-Stillwater’s Mineral Resources and Mineral Reserves are reported in accordance with the SAMREC Code, and are considered to be fully compliant in all material respects with the requirements of the code.

The Mineral Resources and Mineral Reserves Report 2017 contains a comprehensive review of the Mineral Resources and Mineral Reserves as at 31 December 2016, and details the location, geology, mining, processing, operational statistics and changes at each of Sibanye-Stillwater’s mining operations and projects.

Mineral Resources and Mineral Reserves Report 2017
Cover thumbnail: Mineral resources and mineral reserves report 2017

Gold and uranium Mineral Resources and Mineral Reserves split per operation and project as at 31 December 2017

CLASSIFIED GOLD MINERAL RESOURCES AND MINERAL RESERVES STATEMENT1,9 as at 31 December
Mineral ResourcesMineral Reserves
OPERATIONS20172016OPERATIONS20172016
UndergroundTonnes
(Mt)
Grade
(g/t)
Gold
(Moz)
Gold
(Moz)
UndergroundTonnes
(Mt)
Grade
(g/t)
Gold
(Moz)
Gold
(Moz)
Beatrix     Beatrix    
Measured25.56.65.3945.786 Proved AI8.93.30.9332.048
Indicated AI 216.64.32.3106.150 Probable AI11.23.21.1521.675
Inferred AI0.03.30.0040.004      
Total AI42.15.77.70811.940 Total AI20.13.22.0863.723
Indicated BI 33.45.00.5410.789 Probable BI    
Beatrix – total45.55.68.24912.729 Beatrix – total20.13.22.0863.723
Driefontein     Driefontein    
Measured20.712.28.1267.741 Proved AI16.86.73.6024.420
Indicated AI7.911.52.8971.207 Probable AI9.25.61.6700.737
Inferred AI0.05.90.0050.181      
Total AI28.612.011.0299.129 Total AI26.06.35.2725.157
Measured 40.18.40.0172.180 Proved BI 4    
Indicated BI 422.110.27.2906.376 Probable BI 48.86.11.7071.694
Total BI22.210.27.3088.556 Total BI8.86.11.7071.694
Driefontein – total50.711.218.33717.684 Driefontein – total34.86.26.9806.851
Kloof     Kloof    
Measured14.416.27.5387.928 Proved AI13.58.13.5164.700
Indicated AI5.511.62.0741.231 Probable AI13.05.12.1351.184
Inferred AI0.212.00.085       
Total AI20.214.99.6979.159 Total AI26.56.65.6525.884
Measured 53.111.71.162       
Indicated BI 545.113.018.88019.371 Probable BI 53.25.30.5370.566
Inferred BI 52.114.70.9763.831      
Total BI50.213.021.01823.202 Total BI3.25.30.5370.566
Kloof – total70.413.630.71532.361 Kloof – total29.76.56.1896.450
Cooke     Cooke 6    
Measured4.013.11.6893.113 Proved AI   0.728
Indicated AI3.510.11.1304.091 Probable AI   0.097
Inferred AI3.212.01.2202.635      
Total AI10.711.84.0399.839 Total AI   0.826
Inferred BI   3.998      
Cooke – total10.711.84.03913.837 Cooke – total   0.826
Underground – total177.310.861.33976.611 Underground – total84.65.615.25417.849
Surface rock dumps and tailings retreatment facilities  Surface rock dumps and tailings retreatment facilities
Beatrix (Indicated)3.70.30.0410.052 Beatrix (Probable)3.70.30.0410.052
Randfontein Surface     Randfontein Surface    
(Measured)5.40.30.0520.047 (Proved)5.40.30.0520.047
(Indicated)0.40.60.007  (Probable)0.40.60.007 
Driefontein (Indicated)1.10.50.0190.076 Driefontein (Probable)1.10.50.0190.076
Kloof (Indicated)11.30.50.1920.200 Kloof (Probable)11.30.50.1920.200
Surface – total21.80.40.3110.375 Surface – total21.80.40.3110.375
Underground and surface     Underground and surface    
Beatrix49.25.28.29112.781 Beatrix23.92.82.1273.775
Driefontein51.811.018.35517.760 Driefontein35.96.16.9986.926
Kloof81.711.830.90732.561 Kloof41.04.86.3816.650
Cooke16.47.84.09713.883 Cooke5.70.30.0590.872
Total199.19.661.65176.985 Total106.44.515.56518.224
PROJECTS     PROJECTS    
Underground     Underground    
Burnstone 7     Burnstone    
Measured2.25.00.351  Proved0.53.70.058 
Indicated62.44.38.6644.350 Probable14.34.11.8762.137
Inferred   4.540      
Burnstone – total64.64.39.0158.890 Burnstone – total14.84.11.9342.137
Beisa North     Beisa North    
Inferred   1.619      
Beisa North – total   1.619 Beisa North – total    
Bloemhoek*     Bloemhoek*    
Indicated27.44.74.1634.163      
Inferred0.94.90.1350.135      
Bloemhoek – total28.34.74.2974.297 Bloemhoek – total    
De Bron Merriespruit*     De Bron Merriespruit*    
Indicated23.04.53.3073.307 Probable15.44.32.1122.112
Inferred5.34.20.7150.715      
De Bron Merriespruit – total28.34.44.0224.022 De Bron Merriespruit – total15.44.32.1122.112
Underground – total121.24.417.33518.828 Underground – total30.24.24.0454.248
WRTRP8     WRTRP8    
Measured618.50.35.6025.697      
Indicated52.30.30.5240.524 Probable670.80.36.1266.222
WRTRP – total670.80.36.1266.222 WRTRP – total670.80.36.1266.222
Projects – total792.00.923.46025.050 Projects – total701.00.510.17110.470
Grand total – underground and surface991.22.785.111102.035 Grand total – underground and surface807.41.025.73728.694
  • Mineral Resources are inclusive of Mineral Reservese
  • All tonnes (t) are expressed as metric units
  • Cut-off grades have been calculated in accordance with SEC Guidelines for mineral pricing and approximate the historic three-year average commodity prices
  • Mineral Resources were declared at a premium of 10% over the Mineral Reserve metal price
  • Gold Mineral Resources were determined at R540,000/kg and the Gold Mineral Reserves at R490,000/kg
  • 1 Managed, unless otherwise stated
  • 2 Beatrix Indicated Mineral Resources AI and Probable Mineral Reserves includes Beisa Central
  • 3 Beatrix Indicated Mineral Resources BI refers to material below 26 Level (1,341mbs)
  • 4 Cooke Inferred Mineral Resources BI refers to material within Cooke 4 Shaft Prospecting Right (Zuurbekom)
  • 5 Driefontein Indicated and Inferred Mineral Resources and Probable Mineral Reserves BI refers to material below 50 Level (3,300mbs)
  • 6 Kloof Indicated and Inferred Mineral Resources and Probable Mineral Reserves BI refers to material below 45 Level (3,347mbs)
  • * SOFS Projects
Classified uranium Mineral Resources and Mineral Reserves statement 1,3 as at 31 December
Mineral ResourcesMineral Reserves
OPERATIONS20172016OPERATIONS20172016
 Tonnes
(Mt)
Grade
(g/t)
U3O8
(Mlb)
U3O8
(Mlb)
 Tonnes
(Mt)
Grade
(g/t)
U3O8
(Mlb)
U3O8
(Mlb)
Beatrix2     Beatrix    
Measured AI3.61.0868.58.5 Proved AI    
Indicated AI7.81.06918.318.3 Probable AI   16.1
Inferred AI0.01.1010.10.1      
Beatrix – total11.41.07427.027.0 Beatrix – total   16.1
Operations – total11.41.07427.027.0 Operations – total   16.1
PROJECTS     PROJECTS    
Beisa North     Beisa North    
Inferred   35.4      
Beisa North – total   35.4 Beisa North – total    
WRTRP 4     WRTRP 4    
Measured618.50.06386.187.2 Proved    
Indicated52.30.0869.99.9 Probable670.80.06596.197.2
WRTRP – total670.80.06596.197.2 WRTRP – total670.80.06596.197.2
Projects – total670.80.06596.1132.5 Projects – total670.80.06596.197.2
Grand total – operations and projects682.20.082123.1159.5 Grand total – operations and projects670.80.06596.1113.2
  1. For uranium Mineral Reserves, a long-term contract price of R1,208/kg was used
  2. 1 Managed, unless otherwise stated
  3. 2 Beatrix includes uranium Mineral Resources from the Beisa Central project
  4. 3 2017 Mineral Resource depletion includes the actuals up until October 2017 and the remaining depletions were estimates for November – December 2017
  5. 4 Includes the assets which are included with the potential deal with DRDGOLD (44.4Mlb)