presentacion

VĂ­ctor Carlos Estrella / General Manager of Activos Mineros S.A.C. (Company specialized in Remediation of Mining Liabilities), vcarlos@activosmineros.com.pe

September 24 - 25 de 2009 Kangwon Land, Gangwon-do, Korea

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PERU MINING

It´s time to Invest in Peru

PERU MINING

It´s time to Invest in Peru

PERU MINING

It´s time to Invest in Peru

PERU MINING

It´s time to Invest in Peru

PERU MINING

It´s time to Invest in Peru

PERU MINING

It´s time to Invest in Peru

PERU MINING

It´s time to Invest in Peru

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EXPERIENCES IN REMEDIATION OF ENVIRONMENTAL LIABILITIES

ENVIRONMENTAL REMEDIATION OF TABLACHACA

BEFORE

TABLACHACA 

Environmental remediation of Tablachaca

AFTER

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OBJECTIVES

To achieve these project’s objectives, some works and field and laboratory investigations were performed, such as: Hydrology, Geology, Geotechnics, Geochemestry.

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

Hydrology: To evaluate the basins of influence, to determine the design discharge over the basis of predominant meteorological phenomena, characteristics of the rivers and streams within the zone of influence.



Geology: To evaluate the structural condition of the area of study, determining the presence of fractures, cracks, failures, etc. of the area and its surrounding areas.

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

Geotechnics: Evaluation of the physical and static stability of the tailings and wastes deposits, as well as the adjacent slopes of influence, by means of indirect exploration, using Seismic Refraction and direct exploration through drills and

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Geochemestry: Chemical composition of tailings and wastes, as well as the quality of waters from the different superficial run-off flows, mine drainages, industrial waters and waste water. In addition, the Acid - Base Balance of tailings and wastes will be determined, as well as the characteristics of the different quarries, including soil analyses.

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IDENTIFICATION OF NEGATIVE ENVIRONMENTAL IMPACTS AND RISKS 

The main impacts identified were:



Visual Landscape Erosion of the tailings’ surface Contamination with sulfide Possible slides Rimac River water pollution Contamination by infiltration to underground waters Air pollution with presence of dust Damage to adjacent pastures, productivity Safety for passers-by

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

GOALS



To protect health and public safety To prevent environmental degradation in a long term To allow the productive use of affected areas, returning them to their initial state or to an environmentally acceptable one.

To comply with the regulations in force

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

WORKS PERFORMED

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Stabilization Deposit Tablachaca 1 Stabilization Deposit Tablachaca 2 Canalization Stream - Divider Steps - Transition Spring catchment Channel over a tailings deposit Transition and rock channel Cover and revegetation Crest and drainage channels – Accesses Works in tunnels Treatment of existing piezometers Quarries

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

AUTHORIZATION TO USE SURFACES FOR SOWING

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It consists in the qualification of the surface for sowing of vegetables, which contributes to avoid wind and water erosion problems, generation of acid waters and to restitute the previous ecosystem.

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MATERIALS

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a. Substrate

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This material was extracted from the watersheds around the tailings deposit that have a volcanic lithology. This granulated and burdensome material constitutes that substrate in flat zones of the tailings deposits. This material was spread on the tailings deposit with an approximate thickness of 30 cm.

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b. Farming Soil

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This material made of garden soil extracted from the zone of Chinchán, is the physical and biochemical support of vegetation.

The thickness is of 20 cm. For the topsoil, gravel with a less than V’ diameter was used and the volume for the composition of this recommended soil was: 30% gravel, 50% sand and 20% less than mesh 200.

REVEGETATION REVEGETATIONTHE THETAILINGS TAILINGSDEPOSITS DEPOSITS

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PLANT COVER TOP SOIL

TAILINGS DEPOSIT SUBSTRATE GEOTEXTILE GEOMEMBRANE

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OTHER PROYECTS OF ENVIRONMENTAL RECOVERY

TAILINGS BELLAVISTA

TAILINGS YAULIYACU BEFORE

BEFORE

Investment US$:

1’251

Investment US$:

AFTER

859,

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TAILINGS ANTUQUITO BEFORE

TAILINGS CASAPALCA BEFORE

Investment US$:

593,

AFTER

Investment US$:

1’897

AFTER

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DEPOSIT VADO (Arsenic Trioxide) BEFORE

AFTER

AFTER

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DEPOSIT MALPASO (Arsenic Trioxide)

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CLOSE-OUT PLAN: FIVE WASH-OUT DEPOSITS OF «EL DORADO» HUALGAYOC - CAJAMARCA BEFORE

During 2008, it has developed civil work of stabilizing slopes and retaining wall in the foot of the slope. The hydrological stabilization has been performed during civil works and crowning channels.

AFTER

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CLOSE-OUT PLAN: AFFECTED AREAS IN «EL CALLAO» During 2008, the information has been evaluated, dust sampling has begun, as well as grounds, water and sediments in different areas of El Callao.

Brocal

Volcan

in m r Co

Perubar

SIMSA

Perubar

Hoschild

Sta. Luisa

CLOSE-OUT AREAS AFFECTED: EMISSIONS FROM METALLURGICAL MINING CENTER «LA OROYA» The study conducted by «Ground Water International» company has developed the ground characterizati on, the analysis of human health and ecological risk.

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CURRENT RESEARCH AREA 340, 400 Ha Impact Area (Ugarte) 14,190 Ha (1933-1941) 3,830 Ha (1996) Original Sampling Area 70,000 Ha

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PLAN OF QUILLACOCHA «EXCELSIOR» CLOSE-OUT In this environmental liability, it has elaborated a hydrogeological study indicating that the «Excelsior» clearing deposit, is located in an underground water collector from the north, northeast and southeast areas. The best direction of the underground flow is NE to SW, and the infiltration volume is 15.63 l/s.

Excelsior

Ocroyocc

Quiulacocha

Ocroyoc DESMONTES EXCELSIOR Dique Flotante

Dique

Zn-Pb-rich tailings Cu-rich tailings

PROMOTION OF PRIVATE INVESTMENT RECLAIMING LIABILITIES: QUIULACOCHA - EXCELSIOR

A Passive?

Or an Opportunity?

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METAL CONTENT QUIULACOCHA

METAL CONTENT EXCELSIOR 30

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COVERAGE IN THE EXCELSIOR DEPOSIT

In order to mitigate the environmental pollution generated by the Aeolian erosion of the accumulating mining residual materials in the «Excelsior» deposit, generating dust in suspension and rock fall, Activos Mineros made the acquisition and installation of the Geomanta for the coverage of the «Excelsior» slope, located in front of the populated village of Champamarca, contributing to the area’s improvement of living conditions.

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CONCLUSIONS Peru is a country open to mining investments.  Peru has designed environmental sustainability policies to engage in the exploration, exploitation and closure of mines.  We are working on the remediation of mining environmental liabilities.  We are looking for strategic partners in Korea and worldwide. 

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www.activosmineros.com.pe