Macro Metals Ltd (ASX:M4M) completed a detailed program of mapping and rock chip sampling at its Wandanya Manganese Project in WA’s Eastern Pilbara last month, allowing it to define priority drill targets and submit manganese samples for laboratory testing. The program also represented an extension of Macro’s area of focus at the play: traditionally, exploration has targeted the Donkey prospect, but recent fieldwork at two other prospects – Crossroads and Wandanya – has indicated their potential in terms of grade and scale, although they have yet to be drill tested. Previous rock chip sampling…