Yauricocha Deposit » Dia Bras Exploration Inc. — Canadian mining and exploration company

By: Dia Bras  09-12-2011
Keywords: Copper, Zinc

Yauricocha Deposit  

The Yauricocha deposit is a high-temperature, carbonate-replacement silver-lead-zinc-copper deposit.  This deposit type is well-known in the western United States, Mexico and other locations in Latin America. 

The rich silver ores of Yauricocha were initially documented in the early 1800s.  In 1905, claims were filed on what is today known as the Yauricocha property.  High grade silver ore was mined for 22 years, and in 1927 Cerro de Pasco Corporation acquired the Yauricocha claims.  In 1948, Cerro de Pasco commenced mining operations at Yauricocha until the company was nationalized and became a production unit of State-owned Centromin Peru S. A. for 30 years.  In 2002, the Yauricocha unit was privatized and purchased by Sociedad Minera Corona S. A. 

Prior to the 1970´s, detailed production records are unavailable.  Since 1973, Yauricocha has produced 12.8 million metric tonnes of ore containing 59 million ounces of silver as well as 350 thousand tonnes of lead, 100 thousand tonnes of copper and nearly 600 thousand tonnes of zinc.  Since 1979, Yauricocha has averaged 375,000 metric tonnes of production per year.

Minera Corona has steadily increased production from Yauricocha.  During 2003, the mine produced 212,677 metric tonnes  averaging 5.23 oz/t silver, 3.57% lead, 5.86% zinc and 0.60% copper.  During 2010, 837,839 metric tonnes of ore averaging 5.13 oz/t silver, 3.64% lead, 3.25% zinc and 1.00% copper were mined and processed which produced U$120.5 million in gross value of concentrates sold. 

Historical production information for the Yauricocha mine for the three years ended December 31, 2009, appears below.  Such information is based on reports prepared internally by Corona and included in its annual reports for the periods indicated.


2007

2008

2009

Tonnes processed

527,409

690,587

790,743

Daily throughput

1,507

1,973

2,259

Silver oz/standard ton

3.30

5.38

4.93

Lead grade

3.41%

3.26%

3.39%

Copper grade

1.06%

1.04%

1.60%

Zinc grade

3.04%

3.13%

3.17%

Gold, g/t

-

-

-

Total operating cash costs

(US$ '000)

$19,403

$29,386

$33,624

Mine operating cash costs (US$)/DMT processed

$36.79

$42.55

$42.52

The information in this article was current at 06 Dec 2011

Keywords: Copper, Zinc

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