The Woodlawn VMS deposit lies on the eastern limb of the asymmetric northnorthwest plunging Woodlawn Syncline. The regional structures trend approximately north-northwest with the local foliation dipping moderately to steeply to the west. The Woodlawn deposit is hosted by regionally metamorphosed (green schist facies) fine to coarse grained felsic to intermediate volcanic rocks, volcanogenic sedimentary rocks and minor carbonaceous shale, known as the Woodlawn Volcanics. The axial plane dips at about 60° to the west and is paralleled by a strong slaty cleavage or in places a schistosity through the mine sequence.

Within the Woodlawn mine area, the Woodlawn Volcanics comprise a lower sequence of coarse-grained silica and sericite altered volcaniclastic quartz-phyric rhyolitic rocks with siltstone, mudstones and minor basalt overlain by strongly silica and sericite altered rhyodacitic to intermediate volcaniclastic mudstones and sandstones that host the massive sulphide lenses. Overlying the mineralised sequence is a less altered massive, coherent, quartz–feldspar phyric rhyolite unit. The Woodlawn Volcanics have been intruded by calc-alkaline and tholeiitic dolerites (McKay & Hazeldene 1987) related to the Currawang Basalt. Dolerites postdate hydrothermal alteration and mineralisation at Woodlawn and are boudinaged (along with mineralisation) indicating that they were emplaced prior to deformation.

The Currawang deposit is conformable to and hosted by sub ........

Mining at the Woodlawn Project will proceed from two independent ore sources, fresh ore from underground and surface reclaimed tailings from the existing tailings dams.

The tailings will be hydraulically mined using a bottom up approach with a channel feeding back to a sump.

The underground is scheduled to produce at an annualised maximum rate of up to 864 ktpa using three different mining methods:
- Drift and half uppers;
- Underhand Longitudinal Open Stoping; and
- Underhand Transverse Open Stoping.

The underground production is supplemented by the retreatment of the tailings from the previous mining operations. Work undertaken on the processing of the underground ore and tailings has determined that a steady-state production rate was not required for the underground operation, so no nominal production rate was defined for the underground operation. The operation was scheduled with no steady-state production rate target. Access to the Woodlawn mine will be through a new boxcut and portal located to the west of the existing open pit. Ore is scheduled from a combination of new and remnant resource blocks. Ore will be truck hauled to surface then transferred overland to the processing plant located 1.2km to the east via a 2.1km long haul road.

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