● The present Yarrie 1:250,000 Geological Sheet is outdated. Areas previously mapped as granite are in fact new greenstone belts.

● Throughout the Yilgarn banded iron formations have been mapped as metasediments or granite.

● Polaris has reported high-grade iron mineralisation which is not in close proximity to prominent B.I.F ridges. This mineralisation occurs as eroded lateritised (and partially soil covered) outcrops and sub-crops.

● Detrital deposits occur as shallow ‘blankets’ of outwash scree deposited in structural depressions, forming palaeo-channels. The passage of cyclic fluids has resulted in ferruginisation of the matrix and lowering of the phosphorous content. Economic detrital iron accumulations are a valuable resource of low phosphorus, lump iron ore.

● Cementation of the base of the detrital pile can form ‘canga’, a very hard haematitic conglomerate.

● These deposits usually occur near the natural surface in the hydrated zone. They are generally overlain by Quaternary sands and silts and are interbedded with gravels and pisolites.

● On E45/2937, iron ore mineralisation appears to occur down slope of a ridge of an interpreted banded iron formation in the north-west sector of the tenement.