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SUPPLEMENTAL CASH FLOW INFORMATION
 12 Months Ended
Dec. 31, 2018
Disclosure Of Supplemental cash flow information [Abstract]  
Disclosure of cash flow statement [text block]
18. SUPPLEMENTAL CASH FLOW INFORMATION
Supplemental cash flow information (included within operating activities) is as follows:
 
 
Year ended December 31
(in millions of U.S. dollars)
2018
2017
CHANGE IN NON-CASH OPERATING WORKING CAPITAL
  
Trade and other receivables
 (5.4)
15.6
Inventories
 (53.1)
3.2
Prepaid expenses and other
 (0.6)
(1.0)
Trade and other payables
 (12.5)
26.0
Total change in non-cash operating working capital
 (71.6)
43.8
 
 
Year ended December 31
(in millions of U.S. dollars)
2018
2017
OTHER NON-CASH ADJUSTMENTS
  
Unrealized gain on share purchase warrants
 -
(1.2)
Unrealized (gain) loss on concentrate contracts
 0.7
1.9
Equity settled share-based payment expense
 2.7
5.7
Loss (gain) on disposal of assets
 0.3
(0.3)
Settlement and (gain) loss on revaluation of gold price option contracts
 4.8
6.5
Unrealized (gain) loss on gold stream obligation
 (11.7)
21.8
Unrealized (gain) loss on copper forward contracts and copper price option contracts
 (4.8)
4.4
Inventory write-downs
 15.8
-
Revaluation of CSP’s reclamation and closure cost obligation
 1.0
-
Other non-cash adjustments
 0.2
0.2
Total other non-cash adjustments
 9.0
39.0