Hermosa

Who we are
- Our approach
- Our Board
- Our Lead Team
- Risk & governance
  - Anti-bribery and corruption
  - Competing fairly
Our purpose is to make a difference by developing natural resources, improving people's lives now and for generations to come. We are trusted by our owners and partners to realise the potential of their resources.
Our business
- Australia
- Southern Africa
- South America
- Exploration & projects
- Marketing
- Our commodities
We produce commodities including bauxite, alumina, aluminium, copper, silver, lead, zinc, nickel, metallurgical coal and manganese from our operations in Australia, Southern Africa and South America.
Community & society
We’re a business with a purpose and believe trust and transparency are essential to the way we operate. That means being in touch with the broader community – considering different perspectives and working together to create shared value.
Sustainability
Environment
We work hard to be responsible stewards of the environment and treat natural resources with care so that they are available for future generations. Successful environmental management is essential to our business.
People & careers
Our people are the foundation of our success and the key to our sustainability and productivity. Together, we create an inclusive workplace where we hold ourselves and each other to account to demonstrate our values.
Investors & media
- Investor centre
- Media centre
Keep up to date with our latest news and announcements.

History and location

In August 2018, we completed the acquisition of Hermosa in the Patagonia Mountains, about 80 kilometres south-east of Tucson, Arizona. Hermosa comprises the zinc-lead-silver Taylor sulphide deposit (Taylor Deposit), the zinc-manganese-silver Clark oxide deposit (Clark Deposit) and an extensive, highly prospective land package with the potential for further polymetallic and copper mineralisation.

Hermosa strongly complements our existing portfolio and provides the opportunity to leverage the underground mining and processing methods we've used at our Cannington operation in Queensland, Australia.

Our work at Hermosa is part of our strategy to reshape our portfolio and increase exposure to the base metals critical for a low carbon future. Zinc is used in renewable energy infrastructure and to protect against corrosion, while silver is used in solar panels and electric vehicles.

Beneath the surface

We have completed a Pre-feasibility Study (PFS) for the Taylor Deposit, our first development option at Hermosa. It is a large, carbonate replacement massive sulphide deposit with a Mineral Resource estimate of 138Mt, averaging 3.82% zinc, 4.25% lead and 81 g/t silver. The deposit remains open at depth and laterally, offering further exploration potential.

We are designing the Taylor Deposit to be our first ‘next generation mine’, using automation and technology to minimise our impact on the environment and to target a carbon neutral operation, in line with our goal of net zero operational carbon emissions by 2050. Learn more about the PFS here.

A scoping study for the spatially linked Clark Deposit has confirmed the potential for a separate, integrated underground mining operation producing battery-grade manganese, as well as zinc and silver. Clark has the potential to underpin a second development stage at Hermosa, with future studies to consider the opportunity to integrate its development with Taylor.

The Clark Deposit has a reported resource of 55 million tonnes, averaging 2.31% zinc, 9.08% manganese and 78g/t silver. Read the latest announcement here. A scoping study for the Clark deposit is evaluating the potential to produce a manganese product used in electric vehicle batteries.

To take an interactive tour and explore the Taylor deposit please click here. Google Chrome is recommended.

Learn about groundwater management at Hermosa.

Hermosa project update

A milestone for Hermosa with the completion of a pre-feasibility study for Taylor

Creative education

Hermosa supports creative education program for students in Southern Arizona

Support for Patagonia Seniors

Our Hermosa Community Fund supporting non-profit, Senior Citizens of Patagonia

Developing skills for the future

Hermosa funds after school robotics and coding program for young Latina girls

Contact

Get in touch with Hermosa

Pat Risner, President Hermosa

Pat Risner, Hermosa President

Pat studied Mining Engineering at the University of Missouri and came to South32 from BHP, where he held the position of Group Health, Safety and Environment Officer. He is an experienced mining operator, having worked in technical, planning and operational roles in both the United States and Australia. With strong leadership experience in mining health, safety, and environment, he is regarded as an industry expert in complex project planning and development.

Corporate Affairs

Hermosa Project
2210 E Fort Lowell Road
Tucson
Arizona 85719
United States of America

Phone: +1 520 485 1300

Email: [email protected]