DIATREME RESOURCES LIMITED — Board/Management Information 2021

Nov 2, 2021

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ASX ANNOUNCEMENT

3 November 2021

Mr Wayne Swan appointed Non-Executive Director and Chairman

• Former Australian Deputy Prime Minister and Treasurer Wayne Swan appointed as Non-Executive Director and Chairman

• Appointment enhances Diatreme’s Board, providing strong advocate for economic development, renewable energy, Indigenous engagement, environmental protection and health and safety

• Move to strengthen Diatreme’s stakeholder engagement efforts, as Company accelerates development of Galalar Silica Project in Queensland to supply booming solar PV and other markets.

Emerging silica sands developer and explorer, Diatreme Resources Limited (ASX: DRX, or the Company) announced today the appointment of former Australian Deputy Prime Minister and Treasurer, Mr Wayne Swan as a Non-Executive Director and Chairman.

The appointment is effective 2 November 2021 and will significantly enhance Diatreme’s Board, providing a strong advocate for economic development, Indigenous engagement, environmental protection and health and safety, with connections across all levels of government.

Diatreme’s current Chairman, Mr Greg Starr will return to the role of a Non-Executive Director.

The move follows the acceleration of Diatreme’s community engagement activities concerning its Galalar Silica Project in Far North Queensland, which is set to generate new jobs and investment for the benefit of the Hope Vale/Cooktown region, supplying premium-quality silica product for the fast-growing solar PV and other markets.

One of only two Australian Treasurers to be named “Finance Minister of the Year” by Euromoney magazine, Mr Swan enjoyed a lengthy career in Australian federal politics, serving as Treasurer of Australia from 2007 to 2013 and Deputy Prime Minister of Australia from 2010 to 2013. During his parliamentary career, Mr Swan worked to improve legal

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recognition and protection for traditional owners, as well as supporting workers’ rights and Australia’s clean energy future.

Since retiring from Parliament 2019, he has served as national president of the Australian Labor Party, Director of Stanwell Corporation, and Chairman (incoming) of CBUS (Australia’s leading superannuation fund for the building, construction, and allied industries.)

Mr Starr said: “Wayne Swan needs no introduction. As Federal Treasurer, he successfully steered Australia through the Global Financial Crisis, ensuring Australia was one of a few developed nations to avoid recession during this period.

“We are delighted to have Wayne’s support in advancing our stakeholder engagement activities for our Galalar Silica Project, which has now entered a key phase of its development. The level of corporate understanding and gravitas he brings will be invaluable as the Company continues to transition through the final permitting and approvals process to mining.”

Commenting on his appointment, Mr Swan said: “I am pleased to accept this role with Diatreme. The Company’s Galalar Silica project has enormous potential to generate new jobs and investment for the benefit of the Hope Vale/Cooktown region, including the traditional owners, while its silica product will help support the Asia-Pacific region’s push for renewables through its use as a direct component of PV panels.

“Diatreme has shown enormous foresight in its approach towards the traditional owners, giving them a direct stake in the project at an early stage to ensure they receive its economic benefits. I will be working to ensure the Company delivers these benefits to all the community, while also minimising its environmental impact and protecting worker health and safety.

“I also will be striving to ensure successful stakeholder engagement for Diatreme, with such support critical to the Company earning a social licence to operate.”

This announcement was authorised for release by the Board of the Company:

Neil McIntyre Greg Starr Chief Executive Officer Chairman

Contact – Mr Neil McIntyre - Ph – 07 33972222 Website - diatreme.com.au E-mail - manager@diatreme.com.au

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For media queries, please contact: Anthony Fensom, Republic PR anthony@republicpr.com.au Ph: +61 (0)407 112 623

About Diatreme Resources

Diatreme Resources (ASX:DRX) is an emerging Australian producer of mineral and silica sands based in Brisbane. Our key projects comprise the Galalar Silica Project in Far North Queensland, located next to the world's biggest silica sand mine, together with the Cyclone Zircon Project in Western Australia’s Eucla Basin, considered one of a handful of major zircon-rich discoveries of the past decade.

For more information, please visit www.diatreme.com.au