Rio Tinto, the London-based mining company whose subsidiary Kennecott Eagle Minerals has sought to develop a nickel sulphide mine near Marquette, Michigan, USA, has withdrawn a request to prospect for minerals on public forest land in Michigan’s western Upper Peninsula. Concerns about the environmental impact of mines in Michigan are behind a proposed 2010 ballot measure to restrict sulphide and uranium mines.
See http://michiganmessenger.com/30635/rio-tinto-drops-exploration-plans-in-iron-county and http://lakesuperiorminingnews.net/2009/11/19/rio-tinto-drops-michigan-exploration-proposal-on-public-forest-land/