Terrain Minerals has joined the frenetic exploration and drilling fray in Western Australia's up-and-coming, clay-hosted rare earths province near Esperance. The company has joined the ever-growing rare earths search party in the area by launching a maiden proof-of-concept drilling program after securing heritage approval at its 100 per cent-owned, 320-square-kilometre Lort River project, just 50km north-west of the town.