Glebe Mines submitted an application to the Peak District National Park Authority in January to extend the existing Tearsall open pit on Bonsall Moor.

An exhibition will be held until Friday from 3pm to 7pm daily at The Whitworth Centre in Darley Dale.

Fact sheets will be distributed to all households and businesses in the parishes of Winster, South Darley and Bonsall, to provide details of the proposals to extract about 660,000 tonnes of fluorspar ore over a six-year period.

Dr Gary Goodyear of Glebe Mines Limited and INEOS said: "The public exhibition will allow local people to come along, view our plans in more detail and speak to members of the development team who will be on hand to answer any questions regarding the proposals.

"We hope that people will come along and talk to us about the plans, and our proposals for safeguarding the future of Tearsall's natural environment."