The Dubbo Project resource
The Dubbo Project is based on the Toongi deposit, a massive fine-grained trachyte outcrop of Jurassic age with elevated levels of rare earths, zirconium, niobium and hafnium.
The reportable Dubbo Project Mineral Resources are based on the open pittable Toongi deposit, which has a depth extent of 115 metres below surface. These Mineral Resources are wholly inclusive of Ore Reserves, which are based on economic parameters applied to the Mineral Resources, reflecting an initial project horizon of 20 years.
Ore Reserves and Mineral Resources for the Dubbo Project are reported in accordance with the 2012 edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC 2012). These estimates, provided by independent industry consultants Mining One Pty Ltd, take into account revised engineering, costings and revenue data, and were reported to the ASX on 19 September 2017.
Dubbo Project Mineral Resources
| Resource Category | Tonnes
(Mt) |
ZrO2
(%) |
HfO2
(%) |
Nb2O5
(%) |
Ta2O5
(%) |
Y2O3
(%) |
TREO*
(%) |
| Measured | 42.81 | 1.89 | 0.04 | 0.45 | 0.03 | 0.14 | 0.74 |
| Inferred | 32.37 | 1.90 | 0.04 | 0.44 | 0.03 | 0.14 | 0.74 |
| Total | 75.18 | 1.89 | 0.04 | 0.44 | 0.03 | 0.14 | 0.74 |
*TREO% is the sum of all rare earth oxides excluding ZrO2, HfO2, Nb2O3, Ta2O5, Y2O3
Dubbo Project Ore Reserves
| Reserve Category | Tonnes
(Mt) |
ZrO2
(%) |
HfO2
(%) |
Nb2O5
(%) |
Ta2O5
(%) |
Y2O3
(%) |
TREO*
(%) |
| Proved | 18.90 | 1.85 | 0.04 | 0.440 | 0.029 | 0.136 | 0.735 |
| Probable | 0 | ||||||
| Total | 18.90 | 1.85 | 0.04 | 0.440 | 0.029 | 0.136 | 0.735 |
*TREO% is the sum of all rare earth oxides excluding ZrO2, HfO2, Nb2O3, Ta2O5, Y2O3