Name: |
Sample Copper
Mine |
Location: |
x |
Latitude: |
x |
Longitude: |
x |
State: |
x |
Country: |
x |
Geological
Province: |
x |
|
Telephone: |
x |
Facsimile: |
x |
Mine
Status: |
Production |
Mine
Type: |
O/P |
Process
Routes: |
Flotation,
SX/EW |
Reported
Plant Capacity: |
153
ktpd |
Commodities: |
Copper in
concs., Copper-Electrowon, Gold, Molybdenum,
Silver | |
Owners and
Operators
Owner |
%
Interest |
Company A |
100 | |
Operator |
%
Interest |
Operator X |
100 | |
Production
|
|
1989 |
1990 |
1991 |
1992 |
1993 |
1994 |
1995 |
MINING |
|
|
|
|
|
|
|
|
Waste |
|
|
|
|
|
|
|
|
Mill
Ore |
|
|
|
|
|
|
|
|
Waste |
tonnes |
|
|
|
|
|
|
160,776,000 |
Waste
Ratio |
|
2.60 |
2.60 |
2.90 |
2.90 |
2.90 |
2.90 |
2.90 |
Leach
Ore |
|
|
|
|
|
|
|
|
Waste |
tonnes |
|
|
|
|
|
|
6,144,000 |
Waste
Ratio |
|
|
|
|
|
|
|
0.64 |
Total
Waste |
tonnes |
|
|
|
|
|
|
166,920,000 |
Total Waste / Open
Cut Ore Ratio |
|
|
|
|
|
|
|
2.57 |
Ore
Production |
|
|
|
|
|
|
|
|
Mill
Ore |
|
|
|
|
|
|
|
|
Open
Cut |
tonnes |
|
|
|
|
|
|
55,440,000 |
Underground |
tonnes |
|
|
|
|
|
|
|
Total |
tonnes |
|
|
|
|
|
|
55,440,000 |
Open Cut Leach
Ore |
tonnes |
|
|
|
|
|
|
9,600,000 |
Total |
tonnes |
|
|
|
|
|
|
65,040,000 |
PROCESSING |
|
|
|
|
|
|
|
|
Ore
Treated |
|
|
|
|
|
|
|
|
Surface |
tonnes |
|
|
|
|
|
|
55,440,000 |
Underground |
tonnes |
|
|
|
|
|
|
|
Stockpile |
tonnes |
|
|
|
|
|
|
|
Total
Milled |
tonnes |
47,280,000 |
44,810,000 |
49,060,000 |
45,020,000 |
50,246,000 |
54,706,000 |
55,440,000 |
Mill
Capacity |
Mtpy |
|
|
|
|
|
|
|
SX-EW
Leach |
tonnes |
|
37,950,000 |
36,820,000 |
36,820,000 |
29,300,000 |
30,100,000 |
47,226,531 |
Total |
tonnes |
47,280,000 |
82,760,000 |
85,880,000 |
81,840,000 |
79,546,000 |
84,806,000 |
102,666,531 |
Head Grades of Ore
Milled |
|
|
|
|
|
|
|
|
Cu |
% |
1.47 |
1.42 |
1.29 |
1.26 |
1.22 |
1.15 |
1.10 |
Pb |
% |
|
|
|
|
|
|
|
Zn |
% |
|
|
|
|
|
|
|
Mo |
% |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
Co |
% |
|
|
|
|
|
|
|
Au |
g/t |
0.03 |
0.09 |
0.06 |
0.07 |
0.07 |
0.06 |
0.06 |
Ag |
g/t |
4.3 |
|
2.9 |
3.5 |
3.2 |
3.0 |
3.0 |
Sn |
% |
|
|
|
|
|
|
|
Leach Ore Grade |
Cu% |
|
0.60 |
0.60 |
0.60 |
0.68 |
0.70 |
0.59 |
Cu
CON |
|
|
|
|
|
|
|
|
Tonnes of conc |
|
1,695,000 |
1,811,000 |
1,677,000 |
1,633,000 |
1,640,000 |
1,600,000 |
1,540,000 |
Cu |
% |
35.40 |
29.98 |
29.99 |
30.01 |
30.02 |
29.66 |
29.81 |
Au |
g/t |
0.40 |
1.33 |
1.13 |
1.09 |
1.19 |
1.19 |
1.19 |
Ag |
g/t |
102.0 |
86.7 |
73.3 |
71.1 |
74.9 |
75.6 |
85.0 |
Co |
% |
|
|
|
|
|
|
|
Mo |
% |
|
|
|
|
|
|
|
Contained Cu |
tonnes |
600,000 |
543,000 |
503,000 |
490,000 |
492,343 |
474,481 |
459,113 |
Contained Au |
ozs |
21,798R |
77,439R |
60,926R |
57,227 |
62,745 |
61,215 |
58,919 |
Contained Ag |
kgs |
172,808R |
157,014 |
122,850R |
116,025R |
122,850 |
120,900 |
130,900 |
Contained Co |
tonnes |
|
|
|
|
|
|
|
Contained Mo |
tonnes |
|
|
|
|
|
|
|
OTHER
CON |
|
|
|
|
|
|
|
|
Tonnes of conc |
|
5,887 |
5,098 |
4,476 |
4,886 |
4,600 |
4,500 |
5,000 |
Cu |
% |
|
|
|
|
|
|
|
Pb |
% |
|
|
|
|
|
|
|
Zn |
% |
|
|
|
|
|
|
|
Au |
g/t |
|
|
|
|
|
|
|
Ag |
g/t |
|
|
|
|
|
|
|
Mo |
% |
51.20 |
51.00 |
51.01 |
50.00 |
50.00 |
49.80 |
40.58 |
Co |
% |
|
|
|
|
|
|
|
Sn |
% |
|
|
|
|
|
|
|
Contained Cu |
tonnes |
|
|
|
|
|
|
|
Contained Pb |
tonnes |
|
|
|
|
|
|
|
Contained Zn |
tonnes |
|
|
|
|
|
|
|
Contained Au |
ozs |
|
|
|
|
|
|
|
Contained Ag |
kgs |
|
|
|
|
|
|
|
Contained Mo |
tonnes |
3,014R |
2,600R |
2,283R |
2,443R |
2,300R |
2,241R |
2,029R |
Contained Co |
tonnes |
|
|
|
|
|
|
|
Contained Sn |
tonnes |
|
|
|
|
|
|
|
Cu
PROD |
|
|
|
|
|
|
|
|
Cu in Ore Milled |
tonnes |
695,016 |
636,302 |
632,874 |
567,252 |
613,001 |
629,119 |
609,840 |
Metal in Cons |
|
|
|
|
|
|
|
|
Cu |
tonnes |
600,000 |
543,000 |
503,000 |
490,000 |
492,343 |
474,481 |
459,113 |
Recovery |
% |
86.30 |
85.30 |
79.50 |
86.40 |
80.30 |
75.40 |
75.30 |
Contained Cu Leach Ore |
tonnes |
|
227,700 |
220,920 |
220,920 |
199,240 |
210,700 |
278,637 |
EW Copper |
|
|
|
|
|
|
|
|
Cu |
tonnes |
|
148,000 |
148,000 |
148,000 |
134,220 |
141,220 |
160,220 |
Recovery |
% |
|
65.00 |
67.00 |
67.00 |
67.40 |
67.00 |
57.50 |
Total Copper
Production |
tonnes |
600,000R |
691,000R |
651,000R |
638,000R |
626,563R |
615,701R |
619,333R |
Au
PROD |
|
|
|
|
|
|
|
|
Au in Ore Treated |
oz |
45,603 |
129,661 |
94,639 |
101,320 |
113,081 |
105,530 |
106,946 |
Production as
Metal |
|
|
|
|
|
|
|
|
Production by
CIP/CIL |
oz |
|
|
|
|
|
|
|
Production by
HL |
oz |
|
|
|
|
|
|
|
Production by
Gravity |
oz |
|
|
|
|
|
|
|
Sub-total |
oz |
|
|
|
|
|
|
|
Recovery |
% |
|
|
|
|
|
|
|
Au in Conc |
oz |
21,798 |
77,439 |
60,926 |
57,227 |
62,745 |
61,215 |
58,919 |
Total |
|
|
|
|
|
|
|
|
Production |
oz |
21,798 |
77,439 |
60,926 |
57,227 |
62,745 |
61,215 |
58,919 |
Recovery |
% |
47.80 |
59.70 |
64.40 |
56.50 |
55.50 |
58.00 |
55.10 |
Head Grade |
g/t |
0.03 |
0.05 |
0.03 |
0.04 |
0.04 |
0.04 |
0.03 |
Yield |
g/t |
|
|
|
|
|
|
|
Ag
PROD |
|
|
|
|
|
|
|
|
Ag in Ore Treated |
kg |
203,304 |
|
249,052 |
286,440 |
254,547 |
254,418 |
166,320 |
Ag in Cons |
kg |
172,808 |
157,014 |
122,850 |
116,025 |
122,850 |
120,900 |
130,900 |
Ag as Metal |
kg |
|
|
|
|
|
|
|
Total Ag Production |
kg |
172,808 |
157,014 |
122,850 |
116,025 |
122,850 |
120,900 |
130,900 |
Recovery |
% |
85.00 |
|
49.30 |
40.50 |
48.30 |
47.50 |
78.70 |
Mo
PROD |
|
|
|
|
|
|
|
|
Mo in Ore Milled |
tonnes |
14,184 |
13,443 |
14,718 |
13,506 |
15,074 |
16,412 |
16,632 |
Metal in Cons |
|
|
|
|
|
|
|
|
Mo |
tonnes |
3,014 |
2,600 |
2,283 |
2,443 |
2,300 |
2,241 |
2,029 |
Recovery |
% |
21.20 |
19.30 |
15.50 |
18.10 |
15.30 |
13.70 |
12.20 |
|
|
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
MINING |
|
|
|
|
|
|
|
|
Waste |
|
|
|
|
|
|
|
|
Mill
Ore |
|
|
|
|
|
|
|
|
Waste |
tonnes |
102,182,000 |
109,308,000 |
106,134,000 |
116,952,000 |
117,000,000 |
118,000,000 |
118,000,000 |
Waste
Ratio |
|
2.00 |
2.00 |
2.00 |
2.00 |
2.00 |
2.00 |
2.00 |
Leach
Ore |
|
|
|
|
|
|
|
|
Waste |
tonnes |
6,400,000 |
6,656,000 |
6,720,000 |
2,520,000 |
2,520,000 |
2,520,000 |
2,520,000 |
Waste
Ratio |
|
0.64 |
0.64 |
0.64 |
0.40 |
0.40 |
0.40 |
0.40 |
Total
Waste |
tonnes |
108,582,000 |
115,964,000 |
112,854,000 |
119,472,000 |
119,520,000 |
120,520,000 |
120,520,000 |
Total Waste / Open
Cut Ore Ratio |
|
1.78 |
1.78 |
1.78 |
1.84 |
1.84 |
1.85 |
1.85 |
Ore
Production |
|
|
|
|
|
|
|
|
Mill
Ore |
|
|
|
|
|
|
|
|
Open
Cut |
tonnes |
51,091,000 |
54,654,000 |
53,067,000 |
58,476,000 |
58,500,000 |
59,000,000 |
59,000,000 |
Underground |
tonnes |
|
|
|
|
|
|
|
Total |
tonnes |
51,091,000 |
54,654,000 |
53,067,000 |
58,476,000 |
58,500,000 |
59,000,000 |
59,000,000 |
Open Cut Leach
Ore |
tonnes |
10,000,000 |
10,400,000 |
10,500,000 |
6,300,000 |
6,300,000 |
6,300,000 |
6,300,000 |
Total |
tonnes |
61,091,000 |
65,054,000 |
63,567,000 |
64,776,000 |
64,800,000 |
65,300,000 |
65,300,000 |
PROCESSING |
|
|
|
|
|
|
|
|
Ore
Treated |
|
|
|
|
|
|
|
|
Surface |
tonnes |
51,091,000 |
54,654,000 |
53,067,000 |
58,476,000 |
58,500,000 |
59,000,000 |
59,000,000 |
Underground |
tonnes |
|
|
|
|
|
|
|
Stockpile |
tonnes |
|
|
|
|
|
|
|
Total
Milled |
tonnes |
51,091,000 |
54,654,000 |
53,067,000 |
58,476,000 |
58,500,000 |
59,000,000 |
59,000,000 |
Mill
Capacity |
Mtpy |
|
|
|
|
|
|
|
SX-EW
Leach |
tonnes |
51,708,163 |
56,189,796 |
56,289,796 |
52,089,796 |
52,089,796 |
52,089,000 |
52,089,000 |
Total |
tonnes |
102,799,163 |
110,843,796 |
109,356,796 |
110,565,796 |
110,589,796 |
111,089,000 |
111,089,000 |
Head Grades of Ore
Milled |
|
|
|
|
|
|
|
|
Cu |
% |
1.14 |
1.13 |
1.16 |
1.17 |
1.10 |
1.10 |
1.10 |
Pb |
% |
|
|
|
|
|
|
|
Zn |
% |
|
|
|
|
|
|
|
Mo |
% |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
Co |
% |
|
|
|
|
|
|
|
Au |
g/t |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
Ag |
g/t |
3.0 |
3.0 |
3.0 |
3.0 |
3.0 |
3.0 |
3.0 |
Sn |
% |
|
|
|
|
|
|
|
Leach Ore Grade |
Cu% |
0.57 |
0.56 |
0.57 |
0.51 |
0.51 |
0.51 |
0.51 |
Cu
CON |
|
|
|
|
|
|
|
|
Tonnes of conc |
|
1,600,000 |
1,640,000 |
1,640,000 |
1,671,339 |
1,680,000 |
1,690,000 |
1,690,000 |
Cu |
% |
29.91 |
30.11 |
30.11 |
30.09 |
30.00 |
30.00 |
30.00 |
Au |
g/t |
1.19 |
1.19 |
1.19 |
1.19 |
1.25 |
1.25 |
1.25 |
Ag |
g/t |
85.0 |
85.0 |
85.0 |
85.0 |
85.0 |
85.0 |
85.0 |
Co |
% |
|
|
|
|
|
|
|
Mo |
% |
|
|
|
|
|
|
|
Contained Cu |
tonnes |
478,635 |
493,868 |
493,811 |
502,906 |
504,000 |
507,000 |
507,000 |
Contained Au |
ozs |
61,215R |
62,745R |
62,745 |
63,944 |
67,517 |
67,918 |
67,918 |
Contained Ag |
kgs |
136,000 |
139,400 |
139,400 |
142,064 |
142,800 |
143,650 |
143,650 |
Contained Co |
tonnes |
|
|
|
|
|
|
|
Contained Mo |
tonnes |
|
|
|
|
|
|
|
OTHER
CON |
|
|
|
|
|
|
|
|
Tonnes of conc |
|
10,000 |
25,000 |
28,000 |
28,000 |
28,000 |
28,000 |
28,000 |
Cu |
% |
|
|
|
|
|
|
|
Pb |
% |
|
|
|
|
|
|
|
Zn |
% |
|
|
|
|
|
|
|
Au |
g/t |
|
|
|
|
|
|
|
Ag |
g/t |
|
|
|
|
|
|
|
Mo |
% |
51.00 |
50.26 |
53.08 |
50.69 |
51.62 |
51.62 |
51.62 |
Co |
% |
|
|
|
|
|
|
|
Sn |
% |
|
|
|
|
|
|
|
Contained Cu |
tonnes |
|
|
|
|
|
|
|
Contained Pb |
tonnes |
|
|
|
|
|
|
|
Contained Zn |
tonnes |
|
|
|
|
|
|
|
Contained Au |
ozs |
|
|
|
|
|
|
|
Contained Ag |
kgs |
|
|
|
|
|
|
|
Contained Mo |
tonnes |
5,100 |
12,564R |
14,861R |
14,194R |
14,454 |
14,454 |
14,454 |
Contained Co |
tonnes |
|
|
|
|
|
|
|
Contained Sn |
tonnes |
|
|
|
|
|
|
|
Cu
PROD |
|
|
|
|
|
|
|
|
Cu in Ore Milled |
tonnes |
582,437 |
617,590 |
615,577 |
684,169 |
643,500 |
649,000 |
649,000 |
Metal in Cons |
|
|
|
|
|
|
|
|
Cu |
tonnes |
478,635 |
493,868 |
493,811 |
502,906 |
504,000 |
507,000 |
507,000 |
Recovery |
% |
82.20 |
80.00 |
80.20 |
73.50 |
78.30 |
78.10 |
78.10 |
Contained Cu Leach Ore |
tonnes |
294,737 |
314,663 |
320,852 |
265,658 |
265,658 |
265,654 |
265,654 |
EW Copper |
|
|
|
|
|
|
|
|
Cu |
tonnes |
163,220 |
166,220 |
166,220 |
137,220 |
137,220 |
137,220 |
137,220 |
Recovery |
% |
55.40 |
52.80 |
51.80 |
51.70 |
51.70 |
51.70 |
51.70 |
Total Copper
Production |
tonnes |
641,855R |
660,088R |
660,031R |
640,126R |
641,220 |
644,220 |
644,220 |
Au
PROD |
|
|
|
|
|
|
|
|
Au in Ore Treated |
oz |
98,557 |
105,430 |
102,369 |
112,803 |
112,849 |
113,814 |
113,814 |
Production as
Metal |
|
|
|
|
|
|
|
|
Production by
CIP/CIL |
oz |
|
|
|
|
|
|
|
Production by
HL |
oz |
|
|
|
|
|
|
|
Production by
Gravity |
oz |
|
|
|
|
|
|
|
Sub-total |
oz |
|
|
|
|
|
|
|
Recovery |
% |
|
|
|
|
|
|
|
Au in Conc |
oz |
61,215 |
62,745 |
62,745 |
63,944 |
67,517 |
67,918 |
67,918 |
Total |
|
|
|
|
|
|
|
|
Production |
oz |
61,215 |
62,745 |
62,745 |
63,944 |
67,517 |
67,918 |
67,918 |
Recovery |
% |
62.10 |
59.50 |
61.30 |
56.70 |
59.80 |
59.70 |
59.70 |
Head Grade |
g/t |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
0.03 |
Yield |
g/t |
|
|
|
|
|
|
|
Ag
PROD |
|
|
|
|
|
|
|
|
Ag in Ore Treated |
kg |
153,273 |
163,962 |
159,201 |
175,428 |
175,500 |
177,000 |
177,000 |
Ag in Cons |
kg |
136,000 |
139,400 |
139,400 |
142,064 |
142,800 |
143,650 |
143,650 |
Ag as Metal |
kg |
|
|
|
|
|
|
|
Total Ag Production |
kg |
136,000 |
139,400 |
139,400 |
142,064 |
142,800 |
143,650 |
143,650 |
Recovery |
% |
88.70 |
85.00 |
87.60 |
81.00 |
81.40 |
81.20 |
81.20 |
Mo
PROD |
|
|
|
|
|
|
|
|
Mo in Ore Milled |
tonnes |
15,327 |
16,396 |
15,920 |
17,543 |
17,550 |
17,700 |
17,700 |
Metal in Cons |
|
|
|
|
|
|
|
|
Mo |
tonnes |
5,100 |
12,564 |
14,861 |
14,194 |
14,454 |
14,454 |
14,454 |
Recovery |
% |
33.30 |
76.60 |
93.30 |
80.90 |
82.40 |
81.70 |
81.70 |
|
|
2003 |
2004 |
2005 |
|
|
|
|
MINING |
|
|
|
|
|
|
|
|
Waste |
|
|
|
|
|
|
|
|
Mill
Ore |
|
|
|
|
|
|
|
|
Waste |
tonnes |
128,000,000 |
130,000,000 |
130,000,000 |
|
|
|
|
Waste
Ratio |
|
2.00 |
2.00 |
2.00 |
|
|
|
|
Leach
Ore |
|
|
|
|
|
|
|
|
Waste |
tonnes |
2,520,000 |
2,520,000 |
2,520,000 |
|
|
|
|
Waste
Ratio |
|
0.40 |
0.40 |
0.40 |
|
|
|
|
Total
Waste |
tonnes |
130,520,000 |
132,520,000 |
132,520,000 |
|
|
|
|
Total Waste / Open
Cut Ore Ratio |
|
1.86 |
1.86 |
1.86 |
|
|
|
|
Ore
Production |
|
|
|
|
|
|
|
|
Mill
Ore |
|
|
|
|
|
|
|
|
Open
Cut |
tonnes |
64,000,000 |
65,000,000 |
65,000,000 |
|
|
|
|
Underground |
tonnes |
|
|
|
|
|
|
|
Total |
tonnes |
64,000,000 |
65,000,000 |
65,000,000 |
|
|
|
|
Open Cut Leach
Ore |
tonnes |
6,300,000 |
6,300,000 |
6,300,000 |
|
|
|
|
Total |
tonnes |
70,300,000 |
71,300,000 |
71,300,000 |
|
|
|
|
PROCESSING |
|
|
|
|
|
|
|
|
Ore
Treated |
|
|
|
|
|
|
|
|
Surface |
tonnes |
64,000,000 |
65,000,000 |
65,000,000 |
|
|
|
|
Underground |
tonnes |
|
|
|
|
|
|
|
Stockpile |
tonnes |
|
|
|
|
|
|
|
Total
Milled |
tonnes |
64,000,000 |
65,000,000 |
65,000,000 |
|
|
|
|
Mill
Capacity |
Mtpy |
|
|
|
|
|
|
|
SX-EW
Leach |
tonnes |
52,089,000 |
52,089,000 |
52,089,000 |
|
|
|
|
Total |
tonnes |
116,089,000 |
117,089,000 |
117,089,000 |
|
|
|
|
Head Grades of Ore
Milled |
|
|
|
|
|
|
|
|
Cu |
% |
1.08 |
1.08 |
1.08 |
|
|
|
|
Pb |
% |
|
|
|
|
|
|
|
Zn |
% |
|
|
|
|
|
|
|
Mo |
% |
0.03 |
0.03 |
0.03 |
|
|
|
|
Co |
% |
|
|
|
|
|
|
|
Au |
g/t |
0.06 |
0.06 |
0.06 |
|
|
|
|
Ag |
g/t |
3.0 |
3.0 |
3.0 |
|
|
|
|
Sn |
% |
|
|
|
|
|
|
|
Leach Ore Grade |
Cu% |
0.51 |
0.51 |
0.51 |
|
|
|
|
Cu
CON |
|
|
|
|
|
|
|
|
Tonnes of conc |
|
1,800,000 |
1,850,000 |
1,850,000 |
|
|
|
|
Cu |
% |
30.00 |
30.00 |
30.00 |
|
|
|
|
Au |
g/t |
1.25 |
1.25 |
1.25 |
|
|
|
|
Ag |
g/t |
85.0 |
85.0 |
85.0 |
|
|
|
|
Co |
% |
|
|
|
|
|
|
|
Mo |
% |
|
|
|
|
|
|
|
Contained Cu |
tonnes |
540,000 |
555,000 |
555,000 |
|
|
|
|
Contained Au |
ozs |
72,339 |
74,349 |
74,349 |
|
|
|
|
Contained Ag |
kgs |
153,000 |
157,250 |
157,250 |
|
|
|
|
Contained Co |
tonnes |
|
|
|
|
|
|
|
Contained Mo |
tonnes |
|
|
|
|
|
|
|
OTHER
CON |
|
|
|
|
|
|
|
|
Tonnes of conc |
|
30,000 |
31,000 |
31,000 |
|
|
|
|
Cu |
% |
|
|
|
|
|
|
|
Pb |
% |
|
|
|
|
|
|
|
Zn |
% |
|
|
|
|
|
|
|
Au |
g/t |
|
|
|
|
|
|
|
Ag |
g/t |
|
|
|
|
|
|
|
Mo |
% |
51.62 |
51.62 |
51.62 |
|
|
|
|
Co |
% |
|
|
|
|
|
|
|
Sn |
% |
|
|
|
|
|
|
|
Contained Cu |
tonnes |
|
|
|
|
|
|
|
Contained Pb |
tonnes |
|
|
|
|
|
|
|
Contained Zn |
tonnes |
|
|
|
|
|
|
|
Contained Au |
ozs |
|
|
|
|
|
|
|
Contained Ag |
kgs |
|
|
|
|
|
|
|
Contained Mo |
tonnes |
15,486 |
16,002 |
16,002 |
|
|
|
|
Contained Co |
tonnes |
|
|
|
|
|
|
|
Contained Sn |
tonnes |
|
|
|
|
|
|
|
Cu
PROD |
|
|
|
|
|
|
|
|
Cu in Ore Milled |
tonnes |
691,200 |
702,000 |
702,000 |
|
|
|
|
Metal in Cons |
|
|
|
|
|
|
|
|
Cu |
tonnes |
540,000 |
555,000 |
555,000 |
|
|
|
|
Recovery |
% |
78.10 |
79.10 |
79.10 |
|
|
|
|
Contained Cu Leach Ore |
tonnes |
265,654 |
265,654 |
265,654 |
|
|
|
|
EW Copper |
|
|
|
|
|
|
|
|
Cu |
tonnes |
137,220 |
137,220 |
137,220 |
|
|
|
|
Recovery |
% |
51.70 |
51.70 |
51.70 |
|
|
|
|
Total Copper
Production |
tonnes |
677,220 |
692,220 |
692,220 |
|
|
|
|
Au
PROD |
|
|
|
|
|
|
|
|
Au in Ore Treated |
oz |
123,459 |
125,388 |
125,388 |
|
|
|
|
Production as
Metal |
|
|
|
|
|
|
|
|
Production by
CIP/CIL |
oz |
|
|
|
|
|
|
|
Production by
HL |
oz |
|
|
|
|
|
|
|
Production by
Gravity |
oz |
|
|
|
|
|
|
|
Sub-total |
oz |
|
|
|
|
|
|
|
Recovery |
% |
|
|
|
|
|
|
|
Au in Conc |
oz |
72,339 |
74,349 |
74,349 |
|
|
|
|
Total |
|
|
|
|
|
|
|
|
Production |
oz |
72,339 |
74,349 |
74,349 |
|
|
|
|
Recovery |
% |
58.60 |
59.30 |
59.30 |
|
|
|
|
Head Grade |
g/t |
0.03 |
0.03 |
0.03 |
|
|
|
|
Yield |
g/t |
|
|
|
|
|
|
|
Ag
PROD |
|
|
|
|
|
|
|
|
Ag in Ore Treated |
kg |
192,000 |
195,000 |
195,000 |
|
|
|
|
Ag in Cons |
kg |
153,000 |
157,250 |
157,250 |
|
|
|
|
Ag as Metal |
kg |
|
|
|
|
|
|
|
Total Ag Production |
kg |
153,000 |
157,250 |
157,250 |
|
|
|
|
Recovery |
% |
79.70 |
80.60 |
80.60 |
|
|
|
|
Mo
PROD |
|
|
|
|
|
|
|
|
Mo in Ore Milled |
tonnes |
19,200 |
19,500 |
19,500 |
|
|
|
|
Metal in Cons |
|
|
|
|
|
|
|
|
Mo |
tonnes |
15,486 |
16,002 |
16,002 |
|
|
|
|
Recovery |
% |
80.70 |
82.10 |
82.10 |
|
|
|
|
Cost Sheet (Conc) - Cost Information from AME Copper
Cost Report issued Dec 2000
|
|
|
|
|
|
|
Costs in 2000 terms |
|
|
|
|
1998 |
1999 |
2000 |
2001 |
2002 |
2003 |
2004 |
2005 |
|
Mining,
Reclamation & Primary Crushing |
|
Open Pit Waste:Ore |
|
t:t |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
|
Open Pit |
kt ore |
53,067 |
58,476 |
58,500 |
59,000 |
59,000 |
64,000 |
65,000 |
65,000 |
|
Underground |
kt ore |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
kt ore |
53,067 |
58,476 |
58,500 |
59,000 |
59,000 |
64,000 |
65,000 |
65,000 |
|
Material
Reclaimed |
kt |
- |
- |
- |
- |
- |
- |
- |
- |
|
O/P Waste:Ore - Basis
of Costing |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
2.0:1 |
|
Unit
costs |
|
Open Pit |
US$/t ore |
2.54 |
2.45 |
2.55 |
2.44 |
2.43 |
2.42 |
2.41 |
2.40 |
|
Underground |
|
US$/t ore |
- |
- |
- |
- |
- |
- |
- |
- |
|
Reclamation |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
|
Annual Cost of
Mining, Reclamation & Primary Crushing (based on tonnes
processed) |
|
Labour |
US$M |
36.12 |
36.30 |
34.27 |
33.63 |
32.72 |
34.52 |
34.11 |
33.21 |
|
Pet Products |
US$M |
18.10 |
23.74 |
32.07 |
26.89 |
27.07 |
29.56 |
30.22 |
30.42 |
|
Electricity |
US$M |
3.69 |
3.71 |
3.69 |
3.72 |
3.72 |
4.00 |
4.05 |
4.05 |
|
Other
Consumables |
76.83 |
79.46 |
79.27 |
79.95 |
79.95 |
86.71 |
88.06 |
88.06 |
|
|
|
|
|
|
Total |
|
US$M |
134.74 |
143.20 |
149.31 |
144.19 |
143.46 |
154.78 |
156.45 |
155.74 |
|
|
|
|
|
|
Mining |
US$M |
134.74 |
143.20 |
149.31 |
144.19 |
143.46 |
154.78 |
156.45 |
155.74 |
|
Reclamation |
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
Avg No. in
Workforce |
|
1,693 |
1,820 |
1,773 |
1,740 |
1,693 |
1,786 |
1,765 |
1,718 |
Metallurgy |
|
Ore Treated - Total
Milled |
kt |
53,067 |
58,476 |
58,500 |
59,000 |
59,000 |
64,000 |
65,000 |
65,000 |
|
Ore Ground |
kt |
53,067 |
58,476 |
58,500 |
59,000 |
59,000 |
64,000 |
65,000 |
65,000 |
|
Ore
Concentrated |
kt |
53,067 |
58,476 |
58,500 |
59,000 |
59,000 |
64,000 |
65,000 |
65,000 |
|
|
|
- |
- |
- |
- |
- |
- |
- |
- |
|
Unit costs per
tonne ore milled |
|
Ore Transport |
US$/t ore |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
0.01 |
|
Milling |
US$/t ore |
2.01 |
2.02 |
2.03 |
2.02 |
2.02 |
2.04 |
2.04 |
2.04 |
|
Concentrating |
US$/t ore |
0.84 |
0.78 |
0.77 |
0.77 |
0.77 |
0.74 |
0.74 |
0.73 |
|
|
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
|
|
2.87 |
2.82 |
2.81 |
2.80 |
2.80 |
2.79 |
2.79 |
2.78 |
|
|
|
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
- |
- |
- |
- |
- |
- |
- |
- |
|
Annual Cost of
Metallurgy |
|
Milling &
Concentrating |
US$M |
152.04 |
164.73 |
164.67 |
165.44 |
165.34 |
178.54 |
181.12 |
181.02 |
|
Gold Recovery |
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
|
|
152.04 |
164.73 |
164.67 |
165.44 |
165.34 |
178.54 |
181.12 |
181.02 |
|
Labour |
US$M |
5.23 |
4.97 |
4.70 |
4.58 |
4.46 |
4.48 |
4.41 |
4.29 |
|
Pet Products |
|
US$M |
1.35 |
1.88 |
2.54 |
2.12 |
2.14 |
2.31 |
2.36 |
2.37 |
|
Electricity |
|
US$M |
46.52 |
49.46 |
49.26 |
49.75 |
49.75 |
54.63 |
55.61 |
55.61 |
|
Other
Consumables |
US$M |
98.94 |
108.42 |
108.17 |
108.98 |
108.98 |
117.12 |
118.74 |
118.74 |
|
Total
Metallurgy |
US$M |
152.04 |
164.73 |
164.67 |
165.44 |
165.34 |
178.54 |
181.12 |
181.02 |
|
Avg No. in
Workforce |
|
245 |
249 |
243 |
237 |
231 |
232 |
228 |
222 |
Unit Costs per
tonne ore Treated |
|
Mining |
|
US$/t ore |
2.54 |
2.45 |
2.55 |
2.44 |
2.43 |
2.42 |
2.41 |
2.40 |
|
Metallurgy |
|
US$/t ore |
2.87 |
2.82 |
2.81 |
2.80 |
2.80 |
2.79 |
2.79 |
2.78 |
|
|
|
|
|
|
Total |
|
US$/t ore |
5.40 |
5.27 |
5.37 |
5.25 |
5.23 |
5.21 |
5.19 |
5.18 |
|
|
|
|
|
Exchange Rate |
CLP/US$ |
460.3 |
508.8 |
525. |
525. |
525. |
525. |
525. |
525. |
Average Labour
Cost |
US$/head |
$21,330 |
$19,940 |
$19,330 |
$19,330 |
$19,330 |
$19,330 |
$19,330 |
$19,330 |
|
Avg Total
Workforce |
|
1,938 |
2,069 |
2,016 |
1,977 |
1,924 |
2,018 |
1,993 |
1,940 |
Concentrator
Feed |
|
Ore Treated |
|
kt |
53,067 |
58,476 |
58,500 |
59,000 |
59,000 |
64,000 |
65,000 |
65,000 |
|
Head Grade |
Au |
|
0.06g/t |
0.06g/t |
0.06g/t |
0.06g/t |
0.06g/t |
0.06g/t |
0.06g/t |
0.06g/t |
|
|
Ag |
|
3.0g/t |
3.0g/t |
3.0g/t |
3.0g/t |
3.0g/t |
3.0g/t |
3.0g/t |
3.0g/t |
|
|
Cu |
|
1.16% |
1.17% |
1.1% |
1.1% |
1.1% |
1.08% |
1.08% |
1.08% |
|
|
Mo |
|
0.03% |
0.03% |
0.03% |
0.03% |
0.03% |
0.03% |
0.03% |
0.03% |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Silver in
Bullion |
kg |
- |
- |
- |
- |
- |
- |
- |
- |
Gold in
Bullion |
oz |
- |
- |
- |
- |
- |
- |
- |
- |
Nickel
Metal |
t |
- |
- |
- |
- |
- |
- |
- |
- |
Cobalt
Metal |
t |
- |
- |
- |
- |
- |
- |
- |
- |
U3O8
contained |
t |
- |
- |
- |
- |
- |
- |
- |
- |
Copper
Concentrate |
kt |
1640.0 |
1671.3 |
1680.0 |
1690.0 |
1690.0 |
1800.0 |
1850.0 |
1850.0 |
|
Analysis |
Cu |
|
30.11% |
30.09% |
30.0% |
30.0% |
30.0% |
30.0% |
30.0% |
30.0% |
|
|
Ag |
|
85.0g/t |
85.0g/t |
85.0g/t |
85.0g/t |
85.0g/t |
85.0g/t |
85.0g/t |
85.0g/t |
|
|
Au |
|
1.19g/t |
1.19g/t |
1.25g/t |
1.25g/t |
1.25g/t |
1.25g/t |
1.25g/t |
1.25g/t |
|
|
|
|
|
|
|
|
|
|
|
|
Moly
Concentrate |
kt |
28.0 |
28.0 |
28.0 |
28.0 |
28.0 |
30.0 |
31.0 |
31.0 |
|
Analysis |
Mo |
|
53.10% |
50.70% |
51.60% |
51.60% |
51.60% |
51.60% |
51.60% |
51.60% |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(No Conc.
#3) |
kt |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(No Conc.
#4) |
kt |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total Recovered
Metal |
Au |
oz |
62,745 |
63,944 |
67,517 |
67,918 |
67,918 |
72,339 |
74,349 |
74,349 |
|
|
Ag |
kg |
139,400 |
142,064 |
142,800 |
143,650 |
143,650 |
153,000 |
157,250 |
157,250 |
|
Cu |
tonnes |
493,811 |
502,906 |
504,000 |
507,000 |
507,000 |
540,000 |
555,000 |
555,000 |
|
Mo |
tonnes |
14,861 |
14,194 |
14,454 |
14,454 |
14,454 |
15,486 |
16,002 |
16,002 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Overall
Recoveries |
Au |
|
61.3% |
56.7% |
59.8% |
59.7% |
59.7% |
58.6% |
59.3% |
59.3% |
|
Ag |
|
87.6% |
81.0% |
81.4% |
81.2% |
81.2% |
79.7% |
80.6% |
80.6% |
|
Cu |
|
80.2% |
73.5% |
78.3% |
78.1% |
78.1% |
78.1% |
79.1% |
79.1% |
|
Mo |
|
93.3% |
80.9% |
82.4% |
81.7% |
81.7% |
80.7% |
82.1% |
82.1% |
|
|
|
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
- |
- |
- |
- |
- |
- |
- |
- |
Payable
Metals |
|
|
Ag |
kg |
90,200 |
91,924 |
92,400 |
92,950 |
92,950 |
99,000 |
101,750 |
101,750 |
|
|
Cu |
tonnes |
477,411 |
486,193 |
487,200 |
490,100 |
490,100 |
522,000 |
536,500 |
536,500 |
|
|
Mo |
tonnes |
14,861 |
14,194 |
14,454 |
14,454 |
14,454 |
15,486 |
16,002 |
16,002 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Metal Prices
(Including Mine-Specific
Premiums/Discounts) |
Gold |
US$/oz |
294.1 |
278.6 |
280.0 |
293.0 |
295.0 |
293.0 |
290.0 |
287.0 |
Silver |
US$/oz |
5.54 |
5.22 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
Copper |
US¢/lb |
75.0 |
71.4 |
83.0 |
93.0 |
98.0 |
95.0 |
91.0 |
88.0 |
|
Moly disulphide |
|
Mo |
US$/lb |
2.63 |
1.60 |
2.04 |
2.04 |
2.04 |
2.04 |
2.04 |
2.04 |
|
|
|
|
|
|
|
|
|
|
Gross value
in |
|
Metallic
Products |
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
Copper
Concentrate |
US$M |
805.17 |
780.53 |
906.35 |
1,019.79 |
1,073.82 |
1,109.19 |
1,092.68 |
1,057.20 |
|
Other
Concentrates |
US$M |
86.19 |
50.07 |
65.04 |
65.04 |
65.04 |
69.69 |
72.01 |
72.01 |
|
|
|
|
|
|
US$M |
891.36 |
830.59 |
971.39 |
1,084.83 |
1,138.86 |
1,178.87 |
1,164.69 |
1,129.21 |
|
|
|
|
|
Copper
Concentrate |
kt |
1640.0 |
1671.3 |
1680.0 |
1690.0 |
1690.0 |
1800.0 |
1850.0 |
1850.0 |
Gross Value |
US$/t |
491.0 |
467.0 |
539.5 |
603.4 |
635.4 |
616.2 |
590.6 |
571.5 |
Refining
Charges |
US$/t |
(57.2) |
(34.4) |
(43.6) |
(53.6) |
(57.1) |
(55.4) |
(52.5) |
(51.3) |
Treatment
Charges |
US$/t |
(92.3) |
(60.3) |
(67.1) |
(80.1) |
(81.0) |
(81.0) |
(80.1) |
(79.2) |
Freight |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
Net
Realisation |
US$/t |
341.5 |
372.3 |
428.9 |
469.7 |
497.3 |
479.8 |
458.0 |
440.9 |
Moly
Concentrate |
kt |
28.0 |
28.0 |
28.0 |
28.0 |
28.0 |
30.0 |
31.0 |
31.0 |
Gross Value |
US$/t |
3,078.4 |
1,788.1 |
2,322.9 |
2,322.9 |
2,322.9 |
2,322.9 |
2,322.9 |
2,322.9 |
Refining
Charges |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Treatment
Charges |
US$/t |
(500.0) |
(500.0) |
(500.0) |
(500.0) |
(500.0) |
(500.0) |
(500.0) |
(500.0) |
Freight |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
Net
Realisation |
US$/t |
2,578.3 |
1,288.1 |
1,822.9 |
1,822.9 |
1,822.9 |
1,822.9 |
1,822.9 |
1,822.9 |
(No Conc.
#3) |
kt |
- |
- |
- |
- |
- |
- |
- |
- |
Gross Value |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Refining
Charges |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Treatment
Charges |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Freight |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
Net
Realisation |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
(No Conc.
#4) |
kt |
- |
- |
- |
- |
- |
- |
- |
- |
Gross Value |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Refining
Charges |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Treatment
Charges |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Freight |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
Net
Realisation |
US$/t |
- |
- |
- |
- |
- |
- |
- |
- |
Mine Gate
Revenue |
|
Silver in
Bullion |
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
Gold in Bullion |
|
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
Other |
|
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
Cobalt Metal |
|
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
U3O8 |
|
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
|
Concentrates |
|
US$M |
632.27 |
658.29 |
771.52 |
844.78 |
891.45 |
918.38 |
903.87 |
872.18 |
|
|
|
|
|
|
|
|
US$M |
632.27 |
658.29 |
771.52 |
844.78 |
891.45 |
918.38 |
903.87 |
872.18 |
Less Site Cash
Costs |
US$M |
(286.78) |
(307.93) |
(313.97) |
(309.62) |
(308.79) |
(333.32) |
(337.56) |
(336.76) |
|
|
|
|
|
Net Cash
Flow |
US$M |
345.49 |
350.35 |
457.54 |
535.16 |
582.66 |
585.05 |
566.31 |
535.43 |
|
|
|
|
|
Mine Gate
Revenue by Metal |
|
Silver |
|
US$M |
14.62 |
14.24 |
13.67 |
13.75 |
13.75 |
14.64 |
15.05 |
15.05 |
|
Copper |
|
US$M |
545.46 |
607.98 |
706.81 |
779.99 |
826.66 |
849.05 |
832.31 |
800.62 |
|
Moly disulphide |
|
US$M |
72.19 |
36.07 |
51.04 |
51.04 |
51.04 |
54.69 |
56.51 |
56.51 |
|
|
|
0 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
0 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
0 |
- |
- |
- |
- |
- |
- |
- |
- |
CASH
COSTS |
|
Site Costs |
US$M |
286.78 |
307.93 |
313.97 |
309.62 |
308.79 |
333.32 |
337.56 |
336.76 |
|
Treatment
Charges |
US$M |
165.29 |
114.78 |
126.64 |
149.37 |
150.89 |
160.80 |
163.69 |
162.02 |
|
Refining
Charges |
US$M |
93.78 |
57.50 |
73.21 |
90.66 |
96.49 |
99.67 |
97.11 |
94.98 |
|
Freight |
US$M |
0.02 |
0.02 |
0.02 |
0.02 |
0.02 |
0.03 |
0.03 |
0.03 |
|
|
|
|
|
|
|
|
US$M |
545.88 |
480.24 |
513.85 |
549.68 |
556.20 |
593.82 |
598.39 |
593.79 |
|
COST ALLOCATION
by PURE CO-PRODUCT METHOD |
Shared Costs
Allocated by Value (TCs & Freight according to particular
concentrates, RCs directly to metal) |
|
Ag |
|
US$M |
8.08 |
7.84 |
6.75 |
6.23 |
5.96 |
6.59 |
6.93 |
7.12 |
|
Cu |
|
US$M |
491.05 |
441.52 |
472.33 |
510.74 |
518.56 |
552.38 |
554.85 |
549.35 |
|
Mo |
|
US$M |
46.75 |
30.87 |
34.77 |
32.71 |
31.68 |
34.85 |
36.60 |
37.32 |
|
|
|
0 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
Total |
|
US$M |
545.88 |
480.24 |
513.85 |
549.68 |
556.20 |
593.82 |
598.39 |
593.79 |
Costs per Unit
Payable Metal - Co-Product Method |
|
Ag |
|
US$/oz |
2.79 |
2.65 |
2.27 |
2.09 |
1.99 |
2.07 |
2.12 |
2.18 |
|
Cu |
|
US¢/lb |
46.7 |
41.2 |
44.0 |
47.3 |
48.0 |
48.0 |
46.9 |
46.4 |
|
Mo |
|
US$/lb |
1.43 |
0.99 |
1.09 |
1.03 |
0.99 |
1.02 |
1.04 |
1.06 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
COST
ALLOCATION |
Copper: moly
disulphide & silver treated as
by-products |
|
Mining |
|
US$M |
134.74 |
143.20 |
149.31 |
144.19 |
143.46 |
154.78 |
156.45 |
155.74 |
|
Metallurgy |
US$M |
152.04 |
164.73 |
164.67 |
165.44 |
165.34 |
178.54 |
181.12 |
181.02 |
|
Offsite |
US$M |
243.65 |
157.12 |
184.69 |
224.86 |
232.21 |
244.22 |
244.02 |
240.22 |
|
Byproduct
Credits |
US$M |
(86.81) |
(50.31) |
(64.71) |
(64.79) |
(64.79) |
(69.33) |
(71.56) |
(71.56) |
|
|
|
|
|
|
|
Total Cash Cost |
US$M |
443.62 |
414.75 |
433.95 |
469.69 |
476.22 |
508.22 |
510.02 |
505.42 |
|
|
|
|
|
Cu payable |
|
tonnes |
477,411 |
486,193 |
487,200 |
490,100 |
490,100 |
522,000 |
536,500 |
536,500 |
Unit Costs |
|
|
|
|
|
|
|
|
|
|
|
Mining |
US¢/lb Cu |
12.8 |
13.4 |
13.9 |
13.3 |
13.3 |
13.4 |
13.2 |
13.2 |
|
Metallurgy |
US¢/lb Cu |
14.4 |
15.4 |
15.3 |
15.3 |
15.3 |
15.5 |
15.3 |
15.3 |
|
Offsite |
US¢/lb Cu |
23.1 |
14.7 |
17.2 |
20.8 |
21.5 |
21.2 |
20.6 |
20.3 |
|
Byproduct
Credits |
US¢/lb Cu |
(8.2) |
(4.7) |
(6.0) |
(6.0) |
(6.0) |
(6.0) |
(6.0) |
(6.0) |
|
|
|
|
|
|
|
Copper Cash Cost |
US¢/lb Cu |
42.1 |
38.7 |
40.4 |
43.5 |
44.1 |
44.2 |
43.1 |
42.7 |
|
Royalties |
|
US¢/lb Cu |
- |
- |
- |
- |
- |
- |
- |
- |
|
Depreciation |
|
US¢/lb Cu |
8.6 |
8.5 |
8.3 |
8.0 |
8.0 |
7.5 |
7.3 |
7.3 |
|
|
|
|
|
|
|
Copper Production Cost |
US¢/lb Cu |
50.7 |
47.2 |
48.7 |
51.4 |
52.0 |
51.6 |
50.4 |
50.0 |
|
|
|
|
|
|
|
|
|
|
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|
|
|
|
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|
|
|
|
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|
|
|
|
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|
|
|
|
|
|
|
|
|
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cost Sheet (SX-EW) - Cost Information from AME Cost
Report issued Dec 2000
|
|
|
|
|
|
|
|
Costs in 2000 terms |
|
|
|
|
1998 |
1999 |
2000 |
2001 |
2002 |
2003 |
2004 |
2006 |
|
THROUGHPUTS
& OPERATING COSTS |
|
Open Pit
Waste:Ore |
t:t |
0.64:1 |
0.4:1 |
0.4:1 |
0.4:1 |
0.4:1 |
0.4:1 |
0.4:1 |
0.4:1 |
|
Open Pit Ore |
kt ore |
10,500 |
6,300 |
6,300 |
6,300 |
6,300 |
6,300 |
6,300 |
6,300 |
|
Underground
Ore |
kt ore |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
Ore Mined |
kt ore |
10,500 |
6,300 |
6,300 |
6,300 |
6,300 |
6,300 |
6,300 |
6,300 |
|
|
|
|
|
Mining &
Crushing |
Annual Mining
Costs |
|
Labour |
|
US$M |
5.53 |
3.61 |
3.42 |
3.32 |
3.23 |
3.15 |
3.05 |
2.98 |
|
Pet Products |
|
US$M |
1.60 |
1.00 |
1.35 |
1.12 |
1.13 |
1.14 |
1.14 |
1.15 |
|
Electricity |
|
US$M |
0.25 |
0.11 |
0.11 |
0.11 |
0.11 |
0.11 |
0.11 |
0.11 |
|
Other
Consumables |
US$M |
9.26 |
5.81 |
5.80 |
5.80 |
5.80 |
5.80 |
5.80 |
5.80 |
|
|
|
|
|
|
|
US$M |
16.63 |
10.53 |
10.67 |
10.35 |
10.26 |
10.19 |
10.10 |
10.03 |
|
Mine
Employees |
|
259 |
181 |
177 |
172 |
167 |
163 |
158 |
154 |
Leaching &
Processing |
US$/t Cu |
920 |
943 |
1,018 |
971 |
971 |
972 |
973 |
973 |
Annual Leaching
& Processing Costs |
|
Labour |
US$M |
7.74 |
5.78 |
5.49 |
5.33 |
5.20 |
5.06 |
4.93 |
4.79 |
|
Pet Products |
US$M |
20.75 |
19.37 |
26.16 |
21.74 |
21.89 |
22.03 |
22.18 |
22.33 |
|
Electricity |
US$M |
38.15 |
30.24 |
30.72 |
30.72 |
30.72 |
30.72 |
30.72 |
30.72 |
|
Other
Consumables |
US$M |
49.95 |
36.88 |
37.07 |
37.07 |
37.07 |
37.07 |
37.07 |
37.07 |
|
|
|
|
|
|
|
US$M |
116.59 |
92.27 |
99.44 |
94.86 |
94.87 |
94.88 |
94.90 |
94.91 |
|
Process
Employees |
|
363 |
290 |
284 |
276 |
269 |
262 |
255 |
248 |
|
|
|
|
|
|
Avg Total
Workforce |
|
622 |
471 |
461 |
448 |
436 |
425 |
413 |
402 |
|
|
|
|
|
Exchange
Rate |
CLP/US$ |
460.3 |
508.8 |
525. |
525. |
525. |
525. |
525. |
525. |
Average Labour
Cost |
US$/head |
_-$21,330_- |
_-$19,940_- |
_-$19,330_- |
_-$19,330_- |
_-$19,330_- |
_-$19,330_- |
_-$19,330_- |
_-$19,330_- |
|
ORE
TREATED |
kt ore |
56,290 |
52,090 |
52,090 |
52,089 |
52,089 |
52,089 |
52,089 |
52,089 |
|
Avg Grade |
% Cu |
0.57% |
0.51% |
0.51% |
0.51% |
0.51% |
0.51% |
0.51% |
0.51% |
|
|
SX/EW Copper
Produced |
tonnes |
166,220 |
137,220 |
137,220 |
137,220 |
137,220 |
137,220 |
137,220 |
137,220 |
Cu
Recovery |
% Cu |
51.8% |
51.7% |
51.7% |
51.7% |
51.7% |
51.7% |
51.7% |
51.7% |
|
|
REVENUES AND
CASH FLOWS |
Copper Price |
US$/t |
1,653 |
1,574 |
1,830 |
2,050 |
2,161 |
2,094 |
2,006 |
1,940 |
|
|
Product Net
Revenue |
US$M |
274.74 |
215.94 |
251.09 |
281.34 |
296.47 |
287.39 |
275.29 |
266.22 |
By-product Net
Revenue |
US$M |
- |
- |
- |
- |
- |
- |
- |
- |
Less Site Cash
Costs |
US$M |
(133.22) |
(102.80) |
(110.11) |
(105.21) |
(105.13) |
(105.07) |
(105.00) |
(104.94) |
|
|
|
|
|
Net Cash
Flow |
US$M |
141.52 |
113.14 |
140.98 |
176.13 |
191.33 |
182.32 |
170.29 |
161.27 |
|
UNIT
COSTS |
Copper Cost
Components |
|
Mining |
US¢/lb |
4.5 |
3.5 |
3.5 |
3.4 |
3.4 |
3.4 |
3.3 |
3.3 |
|
Leach/SX-EW |
US¢/lb |
31.8 |
30.5 |
32.9 |
31.4 |
31.4 |
31.4 |
31.4 |
31.4 |
|
Offsite |
|
US¢/lb |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
|
|
|
|
|
Copper Cash
Cost |
US¢/lb |
36.4 |
34.0 |
36.4 |
34.8 |
34.8 |
34.7 |
34.7 |
34.7 |
|
Royalties |
|
US¢/lb |
- |
- |
- |
- |
- |
- |
- |
- |
|
Depreciation |
US¢/lb |
5.8 |
7.1 |
6.9 |
6.7 |
6.7 |
6.7 |
6.7 |
6.7 |
|
|
|
|
|
|
|
Total Production Cost |
US¢/lb |
42.2 |
41.1 |
43.3 |
41.5 |
41.4 |
41.4 |
41.4 |
41.4 |
Reserves
Deposit |
Ore Type |
As At |
Mt |
Category |
Grade |
Metal |
|
|
31 Dec 1989 |
4800 |
Total Reserves |
|
Molybdenum |
|
|
31 Dec 1989 |
4800 |
Total Reserves |
|
Gold |
|
|
31 Dec 1989 |
4800 |
Total Reserves |
5.3 g/t |
Silver |
|
SULP |
31 Dec 1995 |
6000 |
Total Reserves |
0.7 % |
Copper in
concs. |
History
Project X is located at an elevation of 2,360 metres (9,300')
above sea level. The climate is extremely dry, resulting in a
dusty working environment.
Operations include the main and
Mina Sur open pits, three mills and concentrators, a smelter,
three refineries and two SX/EW plants.
The operation
is linked to the coast by the Y railway and by two good roads, one
to the port of Y (240km) and one to the smaller port of Z
(150km).
As early as 1536 there were reports of Inca mining
and smelting of copper in the region. Country X gained control of
the region during the mid 19th century War of the Pacific. Country
X prospectors first mined high grade ores at the site in the
1880's. Around 1900 the property was briefly controlled by a
British enterprise, Company B, and by a Country X company, Company
C.
In 1912 the Guggenheim brothers formed the Country
X Exploration Company to explore and develop the property. This
company began leaching 10,000 tonnes per day of oxide ores in
1915. The Company D acquired control of its parent, the Country X
Copper Company, in 1923. From 1913 to 1952 production was solely
derived from oxide ores. Construction of a 25,000 tpd concentrator
to treat sulphide ores began in 1949 and was completed in July,
1952. In mid-1958 a moly recovery section was added.
The
Exotica oxide deposit, now renamed Mina Sur, was discovered in
1957, and was initially developed by a 75/25 joint venture between
Country X Copper Company and Company A. Production was achieved in
1970.
During the process of nationalisation, in January
1970, all of the assets and liabilities of the Country X
Exploration Company were transferred to Company E, which was owned
by Company B (49%) and Company A (51%). Company A acquired Company
B's interest in 1971.
A go-slow by truck drivers, in
protest at new drivers at an adjacent mine receiving as much pay
as veteran Project X drivers, began on May 29, 1998 and severely
disrupted production. Output of copper and molybdenum was
decreased by 50 to 60%.
In March 1999 five of the six
workers unions accepted management plans to freeze wages in order
to contain costs during a period of low copper prices.
The
Mina Sur oxide wastes operation was closed indefinitely in early
1999. This followed problems of excess water and clay in the
wastes which made them clump up on the transportation lines and
hindered the leaching process.
In June 1999 the company set
a budget of 627,500t of contained copper. This represents a fall
from 1998 due to closure of Mina Sur and lower grades. However, it
is 6,500t higher than the original 1999 budget in response to weak
copper prices.
In mid 2000 the company indicated that it
was considering a 10% expansion of treatment capacity in order to
offset the impact of declining ore grades. The expansion would
provide a boost in production of around 50,000tpy of copper in
concentrates from 2003. A feasibility study is also continuing
into the possible development of an SX/EW operation at the Gaby
Sur deposit producing 115,000tpy of copper cathodes at a capital
cost of US$400-450 million. Gaby Sur has reserves of 400Mt at
0.54% copper and could be in production by 2004.
[The
company simply reports the Division's copper production in the
various forms in which it is sold, after most of the concentrates
are smelted and refined. Equivalent copper-in-concentrates
production for this database is calculated at 2% above reported
refined output, after deducting estimated SX-EW production based
on capacity.]
Geology
The Project X orebody lies on the eastern side of the Fisher
fault, which begins here and extends at least 160km to the north.
It is comprised of three important rock units: the Fortuna (38my)
and Elena (122my) granodiorites and the Project X porphyry (24my),
which are all part of a partially exposed Andean batholitic
complex. In the region of the Fisher fault, otherwise known here
as the West fissure, the porphyry is heavily silicified, being
mainly quartz and sericite. The barren Fortuna granodiorite lies
to the west of the fissure, and the rich porphyry to its east. The
porphyry is bounded to its east by shearing and by the Elena
granodiorite.
Ore deposition appears to have proceeded
eastward from the fault, copper minerals being introduced after
the host rock was prepared by fracturing, alteration, and further
fracturing. Uplift in the late Tertiary and a dramatic change from
a humid to an arid climate appear to have caused complex
oxidation, leaching and supergene enrichment.
The Project X
porphyry is a strongly altered quartz latite porphyry. Oxide ores
in its upper portion have largely been extracted, although they
continue to the north. The oxides include cuprite, tenorite,
melaconite, native copper, brochantite, antlerite, chalcanthite
and atacamite. The supergene enriched zone includes chalcocite and
covellite. In addition, ascending fluids have created a hypogene
zone (~1.6% Cu) close to the fissure which is characterised by
chalcopyrite, bornite, pyrite, enargite (Cu3AsS4) and
molybdenite.
At Mina Sur, the Exotica orebody is hosted by
stream gravels and underlying bedrock. It was formed by leaching
of the original Project X porphyry and redeposition some 6km to
the south. It includes the oxide minerals atacamite, chrysocolla,
melaconite, libethenite and copper wad.
Mining
The Project X main pit has reached its maximum depth of 750m,
and is approximately 6km long and 2km wide. The long axis is
almost parallel with a major fault which runs through the entire
district. To the west of the fault lies only waste. The orebody
itself is complex, comprising porphyry copper intersected by veins
and minor faults. The highest grade of ore (~1.6% Cu, 70ppm Mo),
which is also high in arsenic (~140ppm As) lies immediately to the
east of the fault line. Further east is a region of medium grade
(0.5-1.0% Cu, 5-15ppm Mo, 40ppm Zn) with no arsenic. These two
types of material are blended in-pit to provide the feed to the
concentrators. Yet further east, (and therefore higher up the pit
side) follows the low grade (SBL or sulfido de baja ley) copper
zone, grading about 0.3% Cu, which is now mined for dump leaching,
but was for many years simply set aside.
Until 1970 ore
haulage was by train using a bench height of 13m. Truck haulage
was then introduced, and at the same time double height (ie 26m)
benches were introduced. Each bench being 24m wide, this
effectively increased the pit working angle from 28° to about 47°.
The mine is now reverting to single height benches, but most are
only 14m wide, with a berm to arrest spills every fifth bench.
This is further increasing the pit angle to above 60°, and thus
the ore to waste ratio is reduced.
In 1995 the mine moved
daily 160kt of ore to the concentrators, 120kt of SBL to the leach
dumps and 340kt of waste to dumps, (a waste:ore ratio of 2.9:1,
counting the SBL as waste). With the new configuration, the same
movements of ore and SBL will require the movement of 190ktpd of
waste (waste:ore 1.94:1). Waste:ore ratio was 2.6:1 in 1990 and
2.9:1 in 1991.
Major mining equipment comprises 13 drills
(9x Ingersoll-Rand DMH-100, 2x B-E 60R series and 2x Dieltrich
60), 17 shovels (6x P&H2800-XPA 34 cu.yd rated at 42ktpd, 5x
P&H2800 28 cu.yd rated at 35ktpd, plus 6x P&H2800-BLE 17
cu.yd rated at 21ktpd) and 93 trucks (3x various of 240 short
tons, 56x Cat 789 & 789B's of 15st, 27x Dresser 685E Haulpaks
of 205st and 7x Euclid R-170's of 170st, used for watering). Of
the shovels, 2 are retired, 10 are in waste and 5 in ore. The
reduction in haulage duty from 620 to 470ktpd allowed a number of
the trucks to be mothballed.
Ore is hauled to an in-pit
crushing station at where two 1.5m x 2.7m (60x109") cone crushers
with a combined capacity of 240ktpd feed two 1.8m wide belts which
connect the mine, via the old 2.1km rail tunnel, to the
concentrator.
The SBL waste has also been crushed in-pit
and hauled to the lip via an in-pit conveyor. In early 1997 the
semi mobile 1.5 x 2.7m crusher (capacity 120ktpd) was relocated to
a new permanent station at the pit top and the conveyor
decommissioned, in order not to impede mine development. The extra
haulage duty was accommodated by recommissioning many of the
mothballed trucks. SBL material is transported from the pit top
via a 7km belt to leaching dumps.
The Mina Sur pit has a
strip ratio of 3.5:1, and employs 2 shovels and about 20 smaller,
older trucks to mine 10Mtpy of oxide ore, grading 1.3% copper. The
operation starts to reduce in 2002, and the pit is expected to be
exhausted by 2004.
Several options are under examination to
provide copper values to the main SX/EW plant to replace Mina
Sur's contribution, which is already supplemented by the dump
leaching of oxide tailings, both from old dumps and from the
leaching vats. The major potential projects are an extension into
oxides to the north of the main pit, oxide ores located in
sections of some old main pit waste dumps, the MM deposit to the
south, and areas of the tailings dam. Probably several of these
will be developed in parallel to provide a blended pregnant leach
solution meeting necessary criteria in terms of copper tenor,
chloride content, etc.
In March 1999 Company A announced
the closure of the Mina Sur oxide wastes operation, reducing
production by up to 40,000 tpy. Problems began in 1998 because the
wastes contained too much water and clay, which made them clump up
on the transportation lines and hinder the leaching process. A
landslide in a pile of oxide wastes exacerbated this
situation.
Milling
The original milling section (A0) went into service in 1952
with a capacity of 22.7ktpd. By 1977, successive modifications had
expanded it to 70ktpd. It now made up of 12 grinding lines each
based on a 10' x 14' Marcy rod mill and two secondary 10' x 12'
Marcy ball mills. The latter operate in closed circuit with two
clusters of four Krebs D-20 cyclones.
In 1982 a second
concentrator (A1) was added, a 32ktpd plant with three grinding
lines, each based on a 13.5' x 18' rod mill feeding a secondary
16.5' x 21' ball mill, which is in turn operates in closed circuit
with a cluster of 26" cyclones.
The third concentrator
expansion (A2) was made in 1990. This comprised a milling section
with a capacity of 51ktpd, and the modernisation of the old
concentrator to bring its capacity up to 12ktpd. Milling is based
on two parallel grinding lines, each beginning with a Dominion 34'
dia x 17' primary SAG mill (powered by a 11,000hp or 8,206kW
Siemens annular electric motor) fed by a wet pulp containing 68%
solids. SAG mill discharge is delivered to a double-deck
horizontal screen with 25mm apertures on the top deck, and 100m on
the bottom. Oversize from both decks is returned to the SAG mill
feed conveyor, and undersize passes to two parallel secondary
grinding circuits (4 in all). In each secondary circuit, pulp is
pumped to a battery of 8 x 36" hydrocyclones whose underflow
discharge feeds an 18' by 26' Marcy ball mill driven by a 5,000hp
(3,750kW) motor. Ball mill discharge is recycled to the
hydrocyclones. Cyclone overflow passes to the flotation section
via four Tyler vibrating screens with 3.2mm apertures which act as
safety screens to trap any tramp material and return it to the
ball mills.
Thus total mill capacity is now 153ktpd or
about 56Mtpy.
Treatment
For the A2 expansion in 1990, the opportunity was taken to
replace the small Agitair cells of the old 70ktpd concentrator and
carry out other modernisations, lifting its capacity to match the
121ktpd of the combined A0 and A2 milling sections. The flotation
section is equipped mainly with Wemco 190 cells of 42 cu m. These
are arranged in five groups, each of four lines of cells. Three
groups are for primary flotation, one for cleaning and one for
recleaning. In primary flotation, pulp from the 24 ball mills of
the A0 grinding plant passes via two distributors to six banks
each of eight Wemco cells. Pulp from the four A2 ball mills goes
via a motorised distributor to six banks each of seven Wemco
cells. Primary concentrate from four of the banks treating A0
material passes to eight old regrind mills (6' x 12' Marcy ball
mills), while concentrate from all other banks goes to a new
regrind section which has two Marcy 13'6"x 18' ball mills (driven
by 1,492kW motors) operating in closed circuit with batteries of
six Vulco 12B hydrocyclones.
All reground pulp is sent to
four banks of nine cells. The first four cells of each bank act as
cleaners, whose tailings go to the five remaining cells, acting as
scavengers. Concentrate from the cleaners goes to the recleaner
section, which is comprised of four banks of nine smaller Wemco
cells (28 cu.m). The first four cells in each bank produce the
final concentrate, containing 30% Cu and 0.8-1.0% Mo, which is
thickened and then goes to the moly plant. Tailings from these
cells combine with concentrates from the cleaner scavengers to
feed the remaining cells, the recleaner scavengers. Pulp from the
recleaner scavengers is reground in four of the old 6' x 12'
regrind mills and returned to the recleaners.
In the
second, 35ktpd concentrator (A1), cyclone overflow from the
milling section reports to three rows of fifteen 500 cu.ft
roughers whose concentrate is pumped to a battery of six 15"
regrind cyclones in closed circuit with two 10' by 12' ball mills.
Regrind cyclone overflow is directed to the cleaner/cleaner
scavenger circuit. This consists of two rows of thirteen 300 cu.ft
cells in each of which the first five to eight cells can be
assigned to act as cleaners, directing their concentrates to the
recleaner section, while the remaining cells act as scavengers.
Cleaner-scavenger concentrates are reground and directed to the
recleaner-scavenger circuit. Cleaner-scavenger overflow goes to
tailings disposal. The recleaner circuit has two banks of thirteen
cells, six treating concentrate from the cleaners and seven acting
as scavengers on the recleaner overflow and reground
cleaner-scavenger concentrate. Once again, the recleaner
concentrate is thickened before feeding the moly plant.
The
original leach plant, based on 14 vats, was converted to SX/EW
technology in 1986. This plant treats oxide ores from the Mina Sur
pit and oxide tailings to produce around 148ktpy of cathode
copper, although its capacity is rated at 170ktpy. In 1995 a
second SX/EW plant, with a capacity of 14.5ktpy, was commissioned
to treat solutions from the dump leaching (with bacterial
assistance) of low grade sulphide material extracted from portions
of the main pit. The capacity of this plant was augmented by 50%
in late
1996.
|