Ore metal distribution, zonation and structural relationships at Rosebery, western Tasmania. Final report (submitted to Electrolytic Zinc Company of Australasia). (CODES publication 13)

Abstract

This report presents the results of a geological and mineralogical study of ore metal zonation and distribution at Rosebery Mine. This research programme was carried out to understand the geometry of ore lenses in relationship to the metal zonation in order to determine the location and trend of possible hydrothermal vents. These vent positions may be used as a guide for exploration of new base and precious metal targets on the E.Z. mining leases. Ore mineral zonation was investigated on different mine level plans and selected E-W cross-sections. Ore metal assay data (Zn, Cu, Ag, Au and Fe) were plotted by "Prime" computer and contoured diagrams for each metal on each selected cross-section were established. The method and approach used in this research programme is presented in the previous interim report (Khin Zaw et al., 1987). In the last section of the report, a continuing study on geological and mineralogical zonation at the south-end of the Rosebery mine is briefly presented and the mineralogy of gold in the Devonian replacement assemblages is reported.