Avoca Resources' recommended takeover offer for Dioro Exploration has been trumped by Adelaide-based Ramelius Resources, which today launched a superior $92 million all-scrip offer for the gold miner.

Avoca Resources' recommended takeover offer for Dioro Exploration has been trumped by Adelaide-based Ramelius Resources, which today launched a superior $92 million all-scrip offer for the gold miner.