The local share market is trading flat despite a positive lead from Wall Street overnight, with miners among the sectors weighing on the market.
The All Ordinaries index was up 2 points to 4,814 shortly before 11:00am (AEDT), and the ASX 200 index had gained 1 point to 4,789.
Rio Tinto was down 0.7 per cent, while rival BHP Billiton had shed 0.2 per cent.
Two gold and copper miners - Oz Minerals and Newcrest - were down after their latest production results.
Oz shares had tumbled more than 6 per cent to $6.85 after it said fourth quarter production fell, and its Prominent Hill mine was approaching its peak output.
Newcrest shares were off 1.6 per cent after it reported a fall in gold production and said its full-year output would come in at the low end of expectations.
However, oil and gas company Linc Energy surged 13 per cent to $2.44 after releasing two geological reports that estimated there could be up to 233 billion barrels of shale oil in the untapped Arckaringa Basin surrounding Coober Pedy, over the majority of which the company has licences.
Telstra had gained 0.5 per cent, and the big four banks were also in positive territory.
The Australian dollar was buying around 105.37 US cents.