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Región de Antofagasta » Minera El Abra » Explotación de Minas
Martes 24 de Julio del año 2007 » 19:52 Horas.
The El Mochito mine is located in northwest Honduras, near the town of LV
Zinc/lead/silver mineralization at El Mochito occurs in sedimentary rocks ...The El Mochito mine is located in northwest Honduras, near the town of Las Vegas (view map). The closest major city is San Pedro Sula, the commercial centre of the country, approximately 88 kilometres northeast of the mine.

The El Mochito mine was originally discovered in 1938. In 1943, Rosario Resources Corporation purchased the property and production began in 1948. In September 1987, American Pacific Mining Corporation (AMPAC) purchased the mine and in March 1990, Breakwater acquired AMPAC.

The El Mochito mine is accessed by an 870 metre service shaft and a 780 metre production shaft. El Mochito utilizes a combination of mining methods dependent upon the size, geometry and geotechnical considerations of the various zones. Mechanized Post Pillar Cut and Fill is the predominant mining method used in chimney type settings throughout El Mochito but is also used in Manto areas where possible. Post Pillar Open Stoping is used in shallow dipping mantos where the height of the zone is no more than 2 cuts. Conventional narrow vein cut-and-fill and shrinkage stoping is practiced in the higher-grade areas throughout the upper mine.

Summary of Mineral Reserves and Resources

31 December, 2006 31 December, 2005
Tonnes
(000s)
Zn
(%)
Pb
(%)
Ag
(g/t)
Tonnes
(000s)
Zn
(%)
Pb
(%)
Ag
(g/t)
Proven and Probable Reserves 2,899 6.1 2.7 89 2,413 6.6 2.2 87
Measured and Indicated Resources 3,199 6.7 2.8 97 3,195 8.2 2.8 111
Inferred Resources 2,480 5.7 2.3 75 2,174 7.2 4.3 131
Measured and Indicated Resources include Proven and Probable Reserves.

Zinc/lead/silver mineralization at El Mochito occurs in sedimentary rocks of Cretaceous age and belongs to the economically important class of high-temperature replacement zinc/lead deposits in carbonates. Carbonates are particularly susceptible to replacement by acid hydrothermal solutions which, in the case of El Mochito, have deposited skarn minerals such as garnet, epidote and pyroxene together with sulfides of iron, zinc and lead.

The El Mochito mine has a long history of replenishing mineral resources and mineral reserves, and has excellent exploration potential adjacent to mine workings and elsewhere on the property.

The mill is a conventional, differential sulfide flotation mill capable of processing 2,300 tonnes per day of ore, producing separate zinc and lead concentrates. The process consists of crushing, grinding, flotation, concentrate dewatering and tailings disposal.

Year Ended December 31
First Quarter 2007 2006 2005 2004 2003
Ore Milled (Tonnes)
Zinc (%)
Lead (%)
Silver (grams/tonne)
155,184
6.0
2.6
104
690,243
6.0
2.1
92
700,190
6.7
1.8
87
650,017
6.9
1.7
84
652,085
7.3
1.7
87
Concentrate Production
Zinc (tonnes)
    Recovery (%)
    Grade (%)
Lead (tonnes)
    Recovery (%)
    Grade (%)

16,348
89.5
51.2
4,554
79.1
68.8

72,413
90.4
52.0
17,263
81.0
68.2

81,296
91.7
52.5
15,329
80.9
68.4

78,652
91.8
52.7
13,134
80.5
67.6

84,045
92.0
52.1
13,320
81.9
67.7
Metal in Concentrates
Zinc (tonnes)
Lead (tonnes)
Silver (ounces)

8,378
3,134
448,386

37,646
11,775
1,769,456

42,698
10,488
1,723,825

41,413
8,877
1,550,232

43,766
9,014
1,638,465
Total Cash Costs
Per pound payable zinc (US$)

(0.06)

0.43

0.32

0.31

0.29

Breakwater has accelerated its development and exploration programs in various sectors of the mine on targets with the most promise to increase reserves and resources.


http://www.breakwater.ca/operations/mochito.cfm