Pascua Lama

Pascua Lama
Name	Pascua Lama
Country	Chile / Argentina
Coordinates	30°10′S 69°55′W
Products	Gold, Silver
Owner	Barrick Gold (historically)
Status	Suspended / Contested

Pascua Lama

Pascua Lama is a high-altitude gold and silver mining project located on the Andes mountain range straddling the border between Chile and Argentina. The project drew international attention for its setting near glaciers, indigenous communities, and protected areas, and for disputes involving multinational corporations, national regulators, and transnational environmental NGOs. Development plans, legal challenges, and protests linked to the project have intersected with controversies over resource extraction, indigenous rights, and transboundary water stewardship.

Overview

Located in the Huasco Province of Atacama Region, Chile and the San Juan Province of Argentina, the project site sits in a glaciated zone of the Andes Mountains adjacent to the Los Flamencos National Reserve and watersheds feeding the Huasco River and tributaries of the Desaguadero River. The project was proposed and advanced primarily by the multinational mining company Barrick Gold Corporation in partnership arrangements with other private entities and has been subject to permits from the Servicio de Evaluación Ambiental of Chile and provincial authorities of San Juan Province (Argentina). Opposition involved organizations such as Greenpeace, World Wildlife Fund, and local indigenous groups including communities identifying with Diaguita heritage, alongside national actors like the Chilean Constitutional Tribunal and provincial courts in Argentina.

History and development

Exploration in the high Andes by international firms accelerated in the 1990s after trade liberalization and mining investment reforms by the governments of Chile and Argentina. The project area attracted interest from companies including Barrick Gold, which consolidated claims and acquired rights during the early 2000s amid a global commodities boom. Key milestones included feasibility studies produced by engineering firms and consulting groups, environmental impact assessments submitted to the Servicio de Evaluación Ambiental (SEA) and to provincial regulators in San Juan Province (Argentina), and permit decisions that sparked litigation. Legal interventions by Chilean courts and administrative appeals, as well as injunctions in Argentine jurisdictions, shaped the timeline of construction, operational suspension, and ongoing disputes. International finance scrutiny involved export credit agencies and private banks in Canada, United States, and Europe.

Project description and geology

The project targeted epithermal and porphyry-associated mineralization typical of the Andean metallogenic belts identified in regional studies by institutions such as the United States Geological Survey and national geological surveys. Ore bodies were reported as gold-silver rich, associated with intrusive complexes and altered skarn zones mapped by geologists from consulting firms and university programs at institutions like the University of Chile and National University of San Juan. Planned infrastructure included open-pit and heap-leach facilities, access roads over high-altitude passes, waste rock dumps, and water management systems intended to process ore at an onsite plant. The mine plan proposed cyanide leaching for gold recovery, a common technique discussed in technical literature from organizations like the International Cyanide Management Institute and mining engineering societies.

Environmental and social impacts

Concerns focused on potential impacts to glaciers documented by glaciologists from research centers such as the Centro de Estudios Avanzados en Zonas Áridas and the Glaciology Laboratory at universities in Chile and Argentina. Scientists and NGOs warned about risks to water quantity and quality in the Huasco Valley, effects on agricultural communities in nearby valleys, and threats to biodiversity protected under designations like the Ramsar Convention and national reserves. Indigenous and rural stakeholders raised issues related to cultural sites, ancestral lands, and livelihoods tied to irrigation from meltwater. Environmental assessments debated mitigation measures including cryogenic studies, diversion works, and monitoring programs proposed to meet standards referenced by bodies such as the World Bank and regional environmental tribunals.

Legal, regulatory, and political issues

Regulatory scrutiny involved the Servicio de Evaluación Ambiental in Chile and provincial permitting authorities in San Juan Province (Argentina), and invoked litigation before administrative courts, the Chilean Supreme Court, and provincial judiciary bodies. Political debates occurred across administrations in Santiago and Buenos Aires, with parliamentary committees and ministry-level dialogues addressing transboundary impact, compliance with national environmental laws, and adherence to international obligations under agreements like the Andean Community frameworks. Indigenous rights claims referenced national legal instruments and international instruments such as the ILO Convention 169, while corporate defenders cited contractual protections under investment treaties and mining codes administered by ministries of mining and energy.

Economic aspects and ownership

The project attracted major capital investment proposals and financing discussions with international banks, export credit agencies, and private investors. Ownership and joint-venture arrangements centered on Barrick Gold Corporation, which held primary interest and sought partners for financing and construction. Project economics were influenced by world commodity prices for gold and silver tracked on exchanges like the New York Stock Exchange and London Metal Exchange, by capital expenditure projections from engineering firms, and by fiscal regimes set by Chilean and Argentine mining taxation and royalty systems. Forecasts of job creation, local procurement, and regional development were promoted by corporate communications and debated by regional development agencies and trade associations.

Controversies and protests

The project became a focal point for sustained protests by indigenous communities, local farmers, environmental NGOs, and international activist networks including Friends of the Earth and Amnesty International advocacy around human rights aspects. High-profile demonstrations occurred in regional capitals and before embassies, joined by solidarity from student organizations and labor unions. Controversies encompassed allegations of insufficient consultation, contested environmental impact assessments, and claims of regulatory capture, prompting campaigns for stricter environmental oversight and calls for project cancellation. Judicial rulings, administrative suspensions, and continuing activism left the project in a prolonged state of suspension and legal contestation.

Category:Mining in Chile Category:Mining in Argentina Category:Gold mines