The geology of the greater Arcadia area is dominated by greenstone lithologies of the Arcturus formation of the Harare Greenstone Belt (HGB).  These greenstones are encircled and intruded by a variable suite of granitic rocks, the oldest of which may have been coeval with the youngest felsic volcanic rocks of the belt. There is also some evidence for a small remnant area of gneissic basement to the greenstone belt.
The drilling programmes undertaken by Prospect Resources have proved that the package of stacked pegmatites extends for over 3 km of strike length, while surface mapping and trenching has shown the total strike length to be almost 4.5 km.

1Ore Reserve - As described in ASX Announcement 6 December 2017
2Mineral Resource - As described in ASX Announcement 25 October 2017