World April 20, 2026 08:28 AM

Chile and U.S. to Formalize Mining and Security Pacts in Santiago

Ceremony in Santiago will bring senior officials together as countries aim to coordinate on critical minerals and security matters

By Avery Klein
Chile and U.S. to Formalize Mining and Security Pacts in Santiago

Chile and the United States will hold a signing ceremony in Santiago on Monday to formalize agreements relating to mining and security. Senior officials from both governments, including Chilean ministers and a senior U.S. undersecretary, are scheduled to attend. The move follows a recent announcement that the two countries would begin discussions on rare earths and other critical minerals, focusing on financing, recycling and exploration; Chile provided no detail on the exact content of the accords to be signed.

Key Points

  • Chile and the United States will sign agreements on mining and security in Santiago on Monday, with senior officials from both governments present.
  • Named attendees include Chilean Foreign Minister Francisco Perez Mackenna, Minister of Mining and Economy Daniel Mas, and U.S. Undersecretary Thomas DiNanno.
  • The two countries previously said they would begin discussions on rare earths and other critical minerals to coordinate financing, scrap management for recycling, and exploration to boost supplies - but Chile provided no specifics about the agreements to be signed.

SANTIAGO, April 20 - Chile and the United States are set to sign agreements on mining and security on Monday, the Chilean government said.

A signing ceremony will take place in Santiago later on Monday with representatives from both governments present. Chile named the attendees to include Foreign Minister Francisco Perez Mackenna and Minister of Mining and Economy Daniel Mas. From the U.S. side, the government indicated that Thomas DiNanno, the Undersecretary of State for Arms Control and International Security, will attend.

Chile's announcement did not provide specifics on the content of the agreements that will be signed. The public statement withheld details about the terms or scope of the accords.

Last month the two countries said they would initiate discussions concerning rare earths and other types of critical minerals. Those talks were described as aimed at coordinating public and private financing for mining projects, managing scrap to support minerals recycling, and exploring new projects that could increase mineral supplies in both nations.

The upcoming ceremony formalizes the next step in this diplomatic engagement, but the Chilean statement made clear that the text of the agreements was not released in the announcement. Observers will thus need to await the official documents or further communications from the governments to understand the precise commitments and mechanisms involved.

Below are the officials named by Chile who are expected to be present at the signing:

  • Chilean Foreign Minister Francisco Perez Mackenna
  • Chilean Minister of Mining and Economy Daniel Mas
  • U.S. Undersecretary of State for Arms Control and International Security Thomas DiNanno

The prior announcement about launching discussions on rare earths and other critical minerals outlined three stated areas of cooperation: coordination on public and private financing for mining ventures; management of scrap for mineral recycling; and exploration of new projects intended to boost mineral supplies in both countries. The Chilean government, however, did not disclose whether the agreements being signed will implement those specific elements or cover different provisions.

As presented in the government notice, the signing marks a diplomatic step toward collaboration on both mining-related issues and security, but the absence of published agreement text leaves the details and potential implications open until more information is released.

Risks

  • The Chilean statement did not disclose the contents of the agreements, creating uncertainty about the scope and commitments - this affects the mining and critical minerals sectors.
  • Discussions announced last month on rare earths and critical minerals are at an early stage; outcomes and timelines for any practical coordination remain unclear - this poses uncertainty for markets and projects reliant on planned financing or exploration.

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