| Queensland Minerals |
| A Summary of Major Mineral Resources, Mines and Projects, 2nd Edition |
| Deposit Model |
| PORPHYRY-RELATED AURIFEROUS SUBVOLCANIC |
| BRECCIAS & VEINS |
| Mineralisation Age |
| Comments |
| Gold mineralisation at Mount Rawdon is hosted by a sequence of interbedded subaerial pyroclastic flow, surge and ashfall deposits, |
| intruded by coeval dacite bodies and irregular dacite, trachyandesite and trachyte dykes. |
| The bulk of the sequence consists of massive lapillistone. The gold occurs as microscopic fine grains within pyrite and sphalerite, which |
| occur as disseminations and in irregular veinlets within the lapillistone and dacite intrusives. |
| The gold is coincident with a zone of phyllic alteration that has overprinted a more widespread, pervasive zone of chlorite-carbonate |
| alteration. Three times more silver than gold is recovered from the ore. |
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