The horse breeder, the novelist and the $60bn mine

John Kuhns has been many things: an investment banker, a silicon smelter operator in China and a novelist. His sights are now set on an abandoned mine with an estimated $60-billion of gold and copper.

Kuhns is among a handful of people exploring for minerals and courting landowners on the Pacific island of Bougainville. His rivals include an Arabian-horse breeder, a hedge fund investment manager who keeps wallabies on his estate and a former Australian defense minister.

The involvement of such an eclectic mix of entrepreneurs is a reflection of the fact that this is no ordinary mineral reserve. Rio Tinto Group operated the Paguna mine for 17 years through subsidiary Bougainville Copper. The global mining behemoth shut it in 1989 as local protests over mine revenue degenerated into a civil war that killed as many as 20 000 people.