Annual report for Jervois ERL's 6 December 1988 to 7 December 1989

Abstract

During this period a synthesis of all information took place in order that a model for exploration may be constructed. From the results it is apparent that dispersion haloes are of little use in tracing economic mineralisation due to high background levels. Primary zinc dispersion haloes are useful for delineating the occurrence of the prospective horizon in this area, but it is unsuitable for determining economic mineralisation. All of the known ore deposits occur on the western attenuated limit of an F2 antiform. Detailed structural analysis of the area is required to determine reserves and extensions to the ore shoots. Magnetic data suggest possible targets to the north of Bell Bird and in the J-structure east of Reward and Green Parrot. These targets are amenable to EM techniques. Recalculation of available data suggest 600 tonnes of Green Parrot type mineralisation to 100m with 8.2 percent Pb, 250ppm Ag and 2.0 percent Zn, and 680 tonnes Marshall type mineralisation to 100m with 3.2 percent Cu, 60ppm Ag and 0.8 percent Pb-Ag combined.