Description
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AMIS0297 Cu 23% Ag 354ppm Au 2.18g/t Marcapunta Norte Peru
Origin of Material: The concentrate material for AMIS0297 was supplied by Namibia Custom Smelter (Dundee Precious Metals). The AMIS0297 concentrate is originally from the El Brocal – Marcapunta Norte copper mine located in Peru 285 kilometers east of the city of Lima and 10 kilometers south of the city of Cerro de Pasco. El Brocal (Sociedad Minera El Brocal S.A.A.) is a subsidiary of the Buenaventura Mining Company and is engaged in the extraction, concentration and sale of concentrates of polymetallic minerals—mainly zinc, copper, lead and silver.
Mineral and Chemical Composition: Marcapunta Norte is a high sulfidation epithermal polymetalic replacement vein Au-Cu deposit associated with a Miocene diatreme intrusion into Eocene limestone’s and conglomerates. Marcapunta Norte Mine ore comprises gold mineralization in phreatomagmatic breccia’s (vuggy silica) and arsenic copper enargite mineralization in mineralized mantles.
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
Co Fus 1.10 ± 0.09 %
Co M/ICP 1.11 ± 0.05 %
Cu Fus 22.65 ± 1.12 %
Cu M/ICP 23.14 ± 0.76 %
Cu Titration 23.26 ± 0.47 %
Ag M/ICP 354 ± 28.0 ppm
As Fus 7.08 ± 0.54 %
As M/ICP 7.11 ± 0.61 %
Sb Fus 2995 ± 250 ppm
Zn Fus 1.14 ± 0.08 %
Zn M/ICP 1.14 ± 0.06 %
Specific Gravity 4.10 ± 0.10
Provisional Concentrations
Au Pb Collection 2.18 ± 0.28 g/t
Bi Fus 2615 ± 500 ppm
Bi M/ICP 2612 ± 549 ppm
Sn Fus 3053 ± 466 ppm
Sn M/ICP 3013 ± 729 ppm
