Dec 21 (Reuters) - Atlas Iron Ltd AGO.AX :
* Asx alert-atlas delivers positive results from Corunna Downs DFS-ago.ax
* Capital expenditure estimate of A$47m to A$53m to develop project
* C1 cost estimate in range of A$37 to A$43/WMT
* full cash cost estimate in range of A$49 to A$55/WMT Source text for Eikon: ID:nASX2dFys3 Further company coverage: AGO.AX