Investment data shows the Australian economy is continuing to get a big boost from the mining sector.
The Australian Bureau of Statistics has released figures show capital expenditure, or spending on buildings and equipment, reached $37.3 billion in the September quarter.
That's an increase of 12.3%, almost double the expectations of economists.
Mining investment led the rise, up 22.1%.
The figures show resource companies have doubled their capital expenditure over the past four years.
Companies indicate they are planning to increase it this year by 75%.