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 two major mineral deposits, Taylor and Clark.

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.


Beneath the surface

The Taylor deposit is a greenfield development option that has a reported resource of 138 million tonnes, averaging 3.82% zinc, 4.25% lead and 81 g/t silver. Study work to date has confirmed a preference to pursue a dual shaft development configuration, that prioritises early access to higher grade ore. Read the latest announcement here.

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.

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Students gain valuable experience

Summer internships for students provide mining experience at our Hermosa project.

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Developing skills for the future

We've provided funding for an after school program that encourages Latina girls to explore robotics and coding.

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We’ve constructed a dry stack tailings storage

The new state-of-the-art facility meets the highest safety and environmental standards.

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Get in touch with Hermosa

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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 
Arizona 85719
United States of America

Phone: +1 520 485 1300

Email: [email protected]