Indonesian mining company PT Bumi Resources Tbk has announced plans to make a $455 million cash takeover offer for West Perth-based Herald Resources Ltd, which is seeking to develop a zinc/lead project in Sumatra.

Indonesian mining company PT Bumi Resources Tbk has announced plans to make a $455 million cash takeover offer for West Perth-based Herald Resources Ltd, which is seeking to develop a zinc/lead project in Sumatra.