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Commercial Parameters

Pit optimization parameters from Mineral Reserves 2026 MVA. 64 parameters across 5 pits.

64 of 64 shown

Bisha

53

parameters

Harena

54

parameters

Hambok

63

parameters

Northwest

63

parameters

Asheli

62

parameters

Metal Prices (4)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Copper	$/lb	4.2	4.2	4.2	4.2	4.2
Gold	$/oz	3200	3200	3200	3200	2800
Silver	$/oz	30	30	30	30	30
Zinc	$/lb	1.15	1.15	1.15	1.15	1.15

Mining (3)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Reference mining operating cost - Ore	$/t ore mined	2.32	2.32	2.32	2.32	2.32
Reference mining operating cost - Waste	$/t waste mined	2.32	2.32	2.32	2.32	2.32
Incremental cost per 5m bench height	$/t total mined	0.012	0.012	0.012	0.012	0.012

Processing - Primary Ore (4)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Process operating cost	$/t ore milled	31	31	31	26.82	31
G&A cost	$/t ore milled	9	9	9	9	9
Additional Ore rehandling cost	$/t ore milled	-	0.7	1.02	0.45	0.45
Total cost for Primary Ore	$/t ore milled	40	40.7	41.02	36.27	40.45

Processing - Supergene Ore (4)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Process operating cost	$/t ore milled	-	-	31	28.22	31
G&A cost	$/t ore milled	-	-	9	9	9
Additional Ore rehandling cost	$/t ore milled	-	-	1.02	0.45	0.45
Total cost for Supergene Ore	$/t ore milled	-	-	41.02	37.67	0

Copper Concentrate - Supergene (6)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Cu Recovery	%	-	-	73	85.5	86
Au Recovery	%	-	-	27	48	27
Au Grade in Supergene Ore	g/t	2	2	2	2	2
Ag Recovery	%	-	-	34	55	21
Cu Concentrate Grade	%	-	-	13	20.5	-
Zn Concentrate Grade	%	-	-	0	0	-

Copper Concentrate - Primary Ore (7)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Cu Recovery	%	82	88	81	83	86
Zn Recovery	%	5.5	4	4.5	3.5	85
Au Recovery	%	27	27	20	17	27
Au Grade in Cu Concentrate	g/t	2	2	2	2	2
Ag Recovery	%	34	34	30	21	21
Cu Grade	%	21	21	21	20.5	21
Zn Grade	%	6	5	6	4.5	51

Zinc Concentrate (17)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Zn Recovery	%	86	87	82	82	85
Ag Recovery	%	21	18	19	21	21
Zn Grade	%	51	51	51	51	51
Zn payability	%	85	85	85	85	85
Zn minimum deduction	%	8	8	8	8	8
Ag payability	%	70	70	70	70	70
Ag minimum deduction	g/t	93.3	93.3	93.3	93.3	93.3
Zn treatment charge	$/dmt	100	100	100	100	100
Penalty	$/dmt	1.5	1.5	1.5	1.5	1.5
Moisture	%	10	10	10	10	10
Transit losses	%	0.7229	0.7229	0.7229	0.7229	0.7229
Insurance cost	%	0.2	0.2	0.2	0.2	0.2
Inland transport cost	$/wmt	87.97	87.97	87.97	87.97	87.97
Survey/Surveillance/Assays	$/dmt	6	6	6	6	6
Marketing agent fee (Ocean Partners)	$/dmt	2.75	2.75	2.75	2.75	2.75
Port charges	$/wmt	17.3	17.3	17.3	17.3	17.3
Ocean freight charges	$/wmt	50	50	50	50	50

Cu Concentrate (17)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Cu payability	%	96.5	96.5	96.5	96.5	96.5
Cu minimum deduction	%	1	1	1	1	1
Au payability (if above 1g/t Au)	%	90	90	90	90	90
Ag payability (if above 3oz Ag )	%	90	90	90	90	90
Ag minimum deduction	g/t	-	-	-	-	93.3
Inland transport cost	$/wmt	85.3052	85.3052	85.31	85.31	87.97
Survey/Surveillance/Assays	$/dmt	6	6	6	6	6
Marketing agent fee (Ocean Partners)	$/dmt	2.75	2.75	2.75	2.75	2.75
Port charges	$/wmt	17.2	17.2	17.2	17.2	17.3
Ocean freight charges	$/wmt	50	50	50	50	50
Moisture	%	10	10	10	10	10
Transit losses	%	0.598	0.598	0.598	0.598	0.7229
Insurance cost	%	0.2	0.2	0.2	0.2	0.2
Treatment charges	$/dmt	50	50	50	50	50
Cu RC	$/lb	0.05	0.05	0.05	0.05	0.05
Au RC	$/oz	5	5	5	5	5
Ag RC	$/oz	0.4	0.4	0.5	0.4	0.4

Royalty (2)

Parameter	Unit	Bisha	Harena	Hambok	Northwest	Asheli
Precious Metals	%	5	5	5	5	5
Base Metals	%	3.5	3.5	3.5	3.5	3.5

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