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Derivatives (Tables)
12 Months Ended
Dec. 31, 2022
Derivatives  
Summary of unsettled sales contracts

Gold

Silver

Copper

Lead

Zinc

Total

(ounces)

(ounces)

(tonnes)

(tonnes)

(tonnes)

Under contract

4,118

279,537

231

1,386

3,268

Average forward price (per ounce or tonne)

$

1,752

$

21.45

$

8,294

$

2,018

$

3,001

Unsettled sales contracts value (in thousands)

$

7,215

$

5,996

$

1,916

$

2,797

$

9,807

$

27,731