Resources and Reserves

JORC 2012 compliant updated Mineral Resource and Ore Reserves estimates were released to the ASX on 23 June 2020. Key assumptions, data sources and data reliability/quality information relating to the resource can be found in the appendices to the release.

Mineral Resources (by ore type)

  Measured Indicated Inferred Total
Sihayo deposit Mt g/t Moz Mt g/t Moz Mt g/t Moz Mt g/t Moz
Oxide 1.6 1.8 0.09 1.8 1.5 0.09 0.5 1.5 0.02 4.0 1.6 0.21
Transitional 2.4 2.4 0.19 5.0 1.8 0.29 1.8 1.6 0.09 9.2 1.9 0.57
Fresh 0.9 2.8 0.08 4.3 2.3 0.32 3.2 2.0 0.20 8.4 2.2 0.60
Sub-total 4.9 2.3 0.36 11.2 2.0 0.70 5.5 1.8 0.31 21.5 2.0 1.4
Sambung deposit Mt g/t Moz Mt g/t Moz Mt g/t Moz Mt g/t Moz
Oxide 0.5 1.6 0.02 0.3 1.5 0.02 0.1 1.4 0.00 0.9 1.5 0.04
Transitional 1.0 1.6 0.05 0.5 1.8 0.03 0.1 1.8 0.00 1.6 1.7 0.08
Fresh 0.0 1.3 0.00 0.0 1.8 0.00 0.0 2.2 0.00 0.1 1.5 0.00
Sub-total 1.5 1.6 0.08 0.8 1.7 0.04 0.2 1.6 0.01 2.5 1.6 0.13
Combined resources Mt g/t Moz Mt g/t Moz Mt g/t Moz Mt g/t Moz
Total 6.4 2.1 0.44 12.0 2.0 0.75 5.6 1.8 0.32 24.0 2.0 1.5
  • Figures may not sum due to rounding and significant figures do not imply an added level of precision
  • Reported at a cut-off grade of 0.6 g/t for gold
  • Oxide<=1.50gm/cc, transition>=1.51<=2.50gm/cc and Fresh>=2.51gm/cc
  • Numbers for the Sambung deposit are local mine depleted
  • Refer to  23 June 2020 ASX release titled Sihayo Gold Project Definitive Feasibility Study for updated resource statement including JORC Table 1

Ore Reserves (by ore type)

  Proven Probable Total
Sihayo reserves Mt g/t Moz Mt g/t Moz Mt g/t Moz
Oxide 1.6 1.6 0.09 1.8 1.3 0.08 3.5 1.5 0.16
Transitional 2.1 2.4 0.17 2.7 2.1 0.18 4.8 2.2 0.35
Fresh 0.9 2.6 0.07 1.9 2.8 0.17 2.7 2.7 0.24
Sub-total 4.6 2.2 0.33 6.4 2.1 0.43 11.0 2.1 0.75
Sambung reserves Mt g/t Moz Mt g/t Moz Mt g/t Moz
Oxide 0.4 1.6 0.02 0.2 1.5 0.01 0.5 1.5 0.03
Transitional 0.7 1.8 0.04 0.3 2.0 0.02 1.0 1.8 0.06
Fresh 0.0 1.5 0.00 0.0 2.0 0.00 0.0 1.5 0.00
Sub-total 1.1 1.7 0.06 0.4 1.8 0.03 1.5 1.7 0.08
Combined reserves Mt g/t Moz Mt g/t Moz Mt g/t Moz
Total 5.7 2.1 0.39 6.8 2.1 0.45 12.5 2.1 0.84
  • Figures may not sum due to rounding and significant figures do not imply an added level of precision
  • The Ore Reserve is based conventional open pit mining
  • A Net Smelter Revenue (NSR) cut off was calculated using:
  • A gold price of US$1,450/oz
  • Royalty of 3.75% of recovered gold value
  • Tonne weighted average metallurgical recovery of 71%
  • Refer to  23 June 2020 ASX release titled Sihayo Gold Project Definitive Feasibility Study for updated reserve statement including JORC Table 1