The Paulsens deposit lies within the west-northwest trending regional Wyloo anticlinal dome. Archaean Fortescue Group metasediments and metavolcanics of the Hamersley Basin are exposed in the core of the dome and form the host rocks of the Paulsens deposit. Paulsens is a mesothermal, orogenic lodestyle gold deposit with mineralisation occurring within a structurally controlled quartz vein, up to 40m thick, hosted between a structurally offset section of gabbro intrusive, within a folded, sedimentary sequence. The quartz body is found between the two halves of a large faulted Gabbro dyke. The mineralisation is cut in places by a series of steeply dipping dolerite dykes that vary from one to ten metres in thickness.

The main body of mineralisation comprises an Upper (UZ) and Lower (LZ) Zone located on the hanging wall and footwall contacts respectively.

Standard sub level retreat mining methods are predominantly used. Historical mining and reconciliation data have been taken into consideration but without affecting wire frame interpretation. The total model has been coded to identify previously mined areas and only reports remnant mineralisation. Mine Stope Optimiser (MSO) was run at 10m by 10m blocks to identify potentially economic material. This is coarser than the manually created reserve shapes. Small reserve shapes, not picked up by the Resource MOS process, were added to the overall resource.

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