Impact Minerals Ltd Annual Report 2022 25 Figure 6.4: 1VD mag image showing location of new EM plate in relation to the Moorkai intrusive trend with interpreted feeder zone. Figure 6.3: High grade massive sulphide from PSD02. The sulphide has a conductance in excess of 5,000 siemens and similar to that modelled for the new conductor. Review of Operations continued The EM plate is located approximately 1,000 metres southeast along strike from the main Platinum Springs Prospect where previous drilling by Impact returned a narrow intercept of high-grade massive sulphide mineralisation in PSD002 (Figure 6.1 and ASX Release 23rd February 2016) that returned: 0.6 metres at 11.5 g/t platinum, 25.6 g/t palladium, 1.4 g/t gold, 7.6% copper, 7.4% nickel, 44.3 g/t silver, 0.16% cobalt, 1.3 g/t rhodium, 1.7 g/t iridium, 2.0 g/t osmium and 0.8 g/t ruthenium from 57.1 metres down hole (Figure 6.2). A down hole EM survey of PSD002 indicated the massive sulphide had a high conductance greater than 5,000 siemens and similar to that modelled for the new conductor (Figure 6.3). 6.2 ABOUT THE PLATINUM SPRINGS PROSPECT AND MOORKAI TREND The Platinum Springs Prospect lies at the southern end of the Moorkai Trend, a nine kilometre long ultramafic to mafic dyke and chonolith complex that is very poorly explored (Figures 6.1 and 6.2). Although high grade rock chips occur along the entire Trend, only the southern end has been explored in detail but with limited success prior to Impact’s work in the area. This is because the mineralisation appeared to be discontinuous and erratic and the controls on its distribution were poorly understood. Work by Impact, including extensive drilling, identified high grades of nickel-copper-PGM’s in a channel-like structure at the base of the ultramafic unit and which has yet to be followed up (ASX Release 9th March 2021). The channel-like structure was identified in close-spaced drilling using Impact’s proprietary ratio for PGM mineralisation and was the first coherent zone of mineralisation defined in the area in over 30 years of exploration. This work has led to a new geological framework within which to understand the Moorkai Trend (ASX Release 9th March 2021). The EM conductor is located within a major structure to the southeast of the main outcrops of the Moorkai intrusive complex (Figures 6.2 and 6.4). It is possible that the Moorkai Trend formed in a large (now folded) perpendicular structure between two major shear zone structures which bound the intrusive complex (Figure 6.2 and 6.4). These shear zones may be feeder zones to the Moorkai Trend and also raise the possibility that the Trend continues to the south to southeast where similar strongly magnetic rocks occur under thin cover (Figure 6.4).
RkJQdWJsaXNoZXIy MjE2NDg3