WIM100 is the name of the deposit Iluka proposes to mine as part of the Wimmera project; and refers to the geological type of the deposit. There are other WIM-style deposits in the Wimmera region including WIM50, WIM150, WIM200, WIM250 and Goschen South. WIM style deposits are fine grained sands characterised by sheet-like geometry. They are a lower grade but yield higher tonnages relative to other mineral sands deposits. Because of the fine nature of their mineral sands, mining and processing ore from WIM style deposits is technically challenging.