Rio Tinto - JORC Table 1 release

RNS Number : 6322Q
Rio Tinto PLC
22 February 2023
 

Changes to Ore Reserves and Mineral Resources

Rio Tinto has today announced to the Australian Securities Exchange (ASX) changes in Mineral Resources and Ore Reserves to support its 2022 annual reporting [1] , including:  

·

· .

· .

· .

 

 

Rio Tinto Kennecott  

and [2]  

 

Winu  

Table C [3]  

 

 

 

QIT Madagascar Minerals  

[4]  

 

Richards Bay Minerals  

[5]  

 

 


Table A   Rio Tinto Kennecott Copper Bingham Canyon Open Pit Mineral Resources as at 31 December 2022 


Likely
mining
method
(1)

Measured Mineral Resources

Indicated Mineral Resources

Total Measured and Indicated Mineral


as at 31 December 2022



as at 31 December 2022


Resources as at 31 December 2022


Tonnage

Grade




Tonnage

Grade




Tonnage

Grade




Copper (2)

 

Mt

% Cu

g/t Au

g/t Ag

% Mo

Mt

% Cu

g/t Au

g/t Ag

% Mo

Mt

% Cu

g/t Au

g/t Ag

% Mo

Bingham Canyon (US)

















- Bingham Open Pit (3)

O/P

49

0.50

0.15

2.42

0.019

30

0.42

0.15

2.44

0.015

79

0.47

0.15

2.43

0.018

 


Inferred Mineral Resources

Total Mineral Resources

Rio Tinto
interest

Total Mineral Resources

 

 

 

as at 31 December 2022



as at 31 December 2022

as at 31 December 2021


Tonnage

Grade




Tonnage

Grade

 




Tonnage

Grade




Copper (2)

Mt

% Cu

g/t Au

g/t Ag

% Mo

Mt

% Cu

g/t Au

g/t Ag

% Mo

%

Mt

% Cu

g/t Au

g/t Ag

% Mo

Bingham Canyon (US)






 

 

 

 

 







- Bingham Open Pit (3)

14

0.21

0.16

1.19

0.006

93

0.43

0.15

2.24

0.016

100.0

256

0.39

0.20

1.75

0.017

1.  Likely mining method: O/P = open pit/surface. 

2.  Copper Mineral Resources are reported on a dry in situ weight basis.  

3.  Bingham Canyon Open Pit Mineral Resource molybdenum grades interpolated from exploration drilling assays have been factored based on a long reconciliation history to blast hole and mill samples.  

Table B   Rio Tinto Kennecott Copper Bingham Canyon Ore Reserves as at 31 December 2022 


Type
of
mine
(1)

Proved Ore Reserves

Probable Ore Reserves



Total Ore Reserves

 

as at 31 December 2022



as at 31 December 2022


as at 31 December 2022



Tonnage

Grade




Tonnage

Grade




Tonnage

Grade

 



Copper (2)

 

Mt

% Cu

g/t Au

g/t Ag

% Mo

Mt

% Cu

g/t Au

g/t Ag

% Mo

Mt

% Cu

g/t Au

g/t Ag

% Mo

Bingham Canyon (US)












 

 

 

 

 

- Bingham Open Pit (3)

O/P

484

0.40

0.18

2.10

0.037

395

0.35

0.17

1.82

0.029

880

0.38

0.18

1.97

0.033

 


Average mill recovery %


Rio Tinto
interest

Rio Tinto share

 

 

 

Total Ore Reserves

 

 


recoverable metal

 

 

as at 31 December 2021

 



 

 

 

 

 

Tonnage

Grade



 

Copper (2)

Cu

Au

Ag

Mo

%

Mt Cu

Moz Au

Moz Ag

Mt Mo

 

Mt

% Cu

g/t Au

g/t Ag

% Mo

Bingham Canyon (US)






 

 

 

 

 

 

 

 

 

 

- Bingham Open Pit (3)

87

69

72

59

100.0

2.890

3.406

40.386

0.172

 

541

0.44

0.17

2.22

0.029

1.  Type of Mine: O/P = open pit/surface. 

2.  Copper Ore Reserves are reported as dry mill feed tonnes. 

3.  Bingham Canyon Open Pit Ore Reserve molybdenum grades interpolated from exploration drilling assays have been factored based on a long reconciliation history to blast hole and mill samples. 

 

Table C   Winu Mineral Resources as at 31 December 2022 


Likely
mining
method
(1)

Measured Mineral Resources

Indicated Mineral Resources

Total Measured and Indicated Mineral


as at 31 December 2022


as at 31 December 2022



Tonnage

Grade



Tonnage

Grade



Tonnage

Grade



Copper (2)

 

Mt

% Cu

g/t Au

g/t Ag

Mt

% Cu

g/t Au

g/t Ag

Mt

% Cu

g/t Au

g/t Ag

Winu (Australia)

O/P

-

-

-

-

222

0.45

0.35

2.73

222

0.45

0.35

2.73

 


Inferred Mineral Resources

Total Mineral Resources

Rio Tinto
interest


Total Mineral Resources

 

 

as at 31 December 2022


as at 31 December 2022

 

as at 31 December 2021


Tonnage

Grade



Tonnage

Grade

 



Tonnage

Grade



Copper (2)

Mt

% Cu

g/t Au

g/t Ag

Mt

% Cu

g/t Au

g/t Ag

%


Mt

% Cu

g/t Au

g/t Ag

Winu (Australia)

499

0.38

0.33

1.98

721

0.40

0.34

2.21

100.0


608

0.40

0.30

2.26

 

1.  Likely mining method: O/P = open pit/surface. 

2.  Copper Mineral Resources are reported on a dry in situ weight basis. 

 

 

Table D   QIT Madagascar Minerals Mineral Resources as at 31 December 2022 


Likely
mining
method
(1)

Measured Mineral Resources

Indicated Mineral Resources

Total Measured and Indicated Mineral


as at 31 December 2022

as at 31 December 2022

Resources as at 31 December 2022


Tonnage

Grade


Tonnage

Grade


Tonnage

Grade


Titanium dioxide feedstock (2)

 

Mt

% Ti Minerals

% Zircon

Mt

% Ti Minerals

% Zircon

Mt

% Ti Minerals

% Zircon

QMM (Madagascar)

O/P

445

4.3

0.2

398

4.0

0.2

843

4.2

0.2

 


Inferred Mineral Resources

Total Mineral Resources

Rio Tinto
interest

Total Mineral Resources


as at 31 December 2022

as at 31 December 2022

as at 31 December 2021


Tonnage

Grade


Tonnage

Grade

 


Tonnage

Grade


Titanium dioxide feedstock (2)

Mt

% Ti Minerals

% Zircon

Mt

% Ti Minerals

% Zircon

%

Mt

% Ti Minerals

% Zircon

QMM (Madagascar)

596

3.9

0.2

1,439

4.1

0.2

80.0

1,470

4.1

0.2

 

1.  Likely mining method: O/P = open pit/surface. 

2.  Titanium dioxide feedstock Mineral Resources are reported as dry in situ tonnes.  

 

 

 

Table E   Richards Bay Minerals Ore Reserves as at 31 December 2022 


Type
of
mine
(1)

Proved Ore reserves

Probable Ore Reserves

Total Ore Reserves

 

as at 31 December 2022

as at 31 December 2022

as at 31 December 2022


Tonnage

Grade


Tonnage

Grade


Tonnage

Grade

 

Titanium dioxide feedstock (2)

 

Mt

% Ti Minerals

% Zircon

Mt

% Ti Minerals

% Zircon

Mt

% Ti Minerals

% Zircon

RBM (South Africa)

O/P

552

1.6

0.2

732

3.1

0.4

1,284

2.4

0.3

 


Rio Tinto
interest

Rio Tinto share

 

 

Total Ore Reserves


Marketable product

 

 

as at 31 December 2021


 

 

 

Tonnage

Grade


Titanium dioxide feedstock (2)

%

Mt Titanium Dioxide Feedstock

Mt Zircon

 

Mt

% Ti Minerals

% Zircon

RBM (South Africa)

74.0

10.4

2.5


1,393

2.3

0.3

 

1.  Type of Mine: O/P = open pit/surface. 

2.  The marketable product (zircon at RBM and zirsil at QMM) is shown after all mining and processing losses.  Titanium dioxide feedstock Ore Reserves are reported as dry in situ tonnes.  

 


 

Contacts

Please direct all enquiries to media.enquiries@riotinto.com

 

Media Relations, UK

Matthew Klar

M + 44 7796 630 637

 

David Outhwaite

M +44 7787 597 493

 

Media Relations, Americas

Simon Letendre
M +1 514 796 4973

Malika Cherry
M +1 418 592 7293

Investor Relations, UK

Menno Sanderse

M +44 7825 195 178

 

David Ovington

M +44 7920 010 978

 

Clare Peever

M +44 7788 967 877

 

Media Relations, Australia

Matt Chambers

M +61 433 525 739

 

Jesse Riseborough

M +61 436 653 412

 

Alyesha Anderson

M +61 434 868 118

 

 

 

Investor Relations, Australia

Tom Gallop
M +61 439 353 948

Amar Jambaa

M +61 472 865 948

Rio Tinto plc

6 St James's Square
London SW1Y 4AD
United Kingdom

T +44 20 7781 2000
Registered in England

No. 719885

Rio Tinto Limited

Level 43, 120 Collins Street

Melbourne 3000

Australia

 

T +61 3 9283 3333

Registered in Australia

ABN 96 004 458 404

 

This announcement is authorised for release to the market by Steve Allen, Rio Tinto's Group Company Secretary.

 

riotinto.com

 



[1] These Mineral Resources and Ore Reserves were reported in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves, 2012 (JORC Code) and the ASX Listing Rules in a release to the ASX dated 22 February 2023 titled "Ore Reserve and Mineral Resource updates: supporting information and Table 1 checklists" (Table 1 Release). Rio Tinto confirms that it is not aware of any new information or data that materially affects the information included in the Table 1 Release, that all material assumptions and technical parameters underpinning the estimates in the Table 1 Release continue to apply and have not materially changed, and that the form and context in which the Competent Persons' findings are presented have not been materially modified.

[2] The Competent Persons responsible for the information in the Table 1 Release that relates to Rio Tinto Kennecott Mineral Resources were Kim Schroeder and Pancho Rodriguez, who are Members of the Australasian Institute of Mining and Metallurgy (MAusIMM). The Competent Person responsible for the information in the Table 1 Release that relates to Rio Tinto Kennecott Ore Reserves is Brady Pett (MAusIMM).

[3] The Competent Person responsible for the information in the Table 1 Release that relates to Winu Mineral Resources was James Pocoe (MAusIMM).

[4] The Competent Person responsible for the information in the Table 1 Release that relates to QIT Madagascar Minerals Mineral Resources was Adriaan Louw, who is a Member of the South African Council for Natural Scientific Professionals (SACNASP).

[5] The Competent Person responsible for the information in the Table 1 Release that relates to Richards Bay Minerals Mineral Resources was Anton Cawthorn-Blazeby (MAusIMM). The Competent Person responsible for the information in the Table 1 Release that relates to Richards Bay Minerals Ore Reserves is Sinetemba Mnunu (MAusIMM).

 

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