MEM aprobó estudio de impacto ambiental de ToromochoLa Dirección General de Asuntos Ambientales Mineros (DGAAM) del Ministerio de En. While Chinalco had paid $ million for Toromocho, it expected to produce .. and Mines had to approve the EIA for an extractive project in Peru before. Gerald Wolfe pointed out that the company, which invested $ million in Toromocho last year, is waiting for the EIA approval to begin the construction phase.

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The basic metal prices and cutoff grades for determination of Mineral Reserves and Mineral Resources are also included within the notes on Table Those metal prices ei higher than those used for development of the mine plan.

IMC determined that selective mining of high arsenic could be accomplished and therefore these ores would be removed to allow the production of final copper concentrates of less than smelter penalty grade arsenic. Slope Angles All Cases. There is a central potassic zone with secondary biotite, quartz and pyrite which is surrounded by a phyllic zone with quartz, sericite.

Those pulps have been reassayed as a check on the old methods. Heap leach recovery by year was modified by IMC to reflect inventory in pad and residual leach.

The distance east to La Oroya is about 32 km by road and 35 km by rail. IMC utilized the floating cone algorithm to provide guidance to the design of the final pit and to establish the best extraction order for the mine life. Table summarizes the input information used for mill ore.


Preparation toromoho Tailings and Concentrate Samples for.

Toromocho Project Technical Report dated March 22,

eua Pulverizing is completed with ring and puck pulverizers. The assay differentiates between leachable secondary sulfide minerals chalcocite, digenite, covellite, bornite etc and non-leachable primary copper minerals such as chalcopyrite. A sulfide mill and. The acid soluble rejects are rinsed dried, and dissolved in cyanide solution followed by AA to estimate the amount of chalcocite and other cyanide soluble species.

Chalcopyrite exists in all of the composites however increases with depth. PCI drilled several diamond drill holes from both the surface and underground toromoccho near the shaft.

The Old Holes are generally on a to m spaced drill grid with more infill drilling in the central area of the deposit as indicated on Figure This Technical Report presents a more recent data set and mine plan. MAG of Tucson, Arizona. Comparison of locked cycle results between mass balance of all cycles or only last 3 cycles weighted head grade average.

From youngest to oldest, they are: The Low Grade to Mill Stockpile is comprised of the low grade skarn ores at breakeven cutoff that are stockpiled to the east of the pit and are reclaimed to the mill after the pit is exhausted.

PCI and Corona have a signed contract that states that upon execution of the PCI option to produce ore from Toromocho, a land swap will occur toromochi the Corona claims inside Toromocho 2 will be transferred to PCI in exchange for land in Toromocho 3 that is not within the planned Tormocho pit.


Toromocho mine

Geotechnical logging is completed on whole core. Permits to develop the project are required by Peruvian law. Maximum Prices to Set Cone Limits. The hydrothermal mineralization of the Toromocho deposit is well zoned.

Sociedad Minera de Responsabilidad Limitada, Sociedad Anonima, and Condominium, which are organizations that also have mining concessions adjacent to the project. The metal zoning has some significance from the standpoint of Toromocho development because ultimate back slopes for a Toromocho pit will extend into the vein zone. Mill Processing Schedule Input Parameters.

| Minera Chinalco Perú – Proyecto Toromocho

The resulting assignments were checked on section and on plan. Execution of the items laid out in the toronocho agreement will result in the go ahead for eventual production. The results indicate sound comparison between the CIMM lab and the outside lab for total copper assay. Old Drilling and Assay. CNI were utilized in the pit design.

MAG has appended to the report much work produced by others.