Drilling products and services company Boart Longyear announced a $US250 million offering of senior notes due in 2021. The proceeds of the offer will be used to repay a $US65 million term loan and $US180 million in borrowings under a revolving credit facility and for general corporate purposes.Luke Forrestal

Copper miner Aditya Birla Minerals has suspended preparatory work for the recommencement of underground mining at its Mount Gordon operation near Mt Isa in northern Queensland following the collapse of a collar on a ventilation shaft.Luke Forrestal