b'FeatureDiscovery and geophysics of the Khamsin depositFigure 6. Cross-section along EW line P1 in Figure 5.1. Profiles: gravity=red; magnetics=blue; solid=data; model response=dotted. The dotted red single-Figure 5 .1. Model body tops. Yellow dots are drill collars. peak gravity response occurs when body 115 has zero density contrast.Figure 7. Phase/Scatter diagram with body numbers for bodies and groups ofbodies thought to have economic significance.Figure 5.2. Model depth slice: 460 mto the host rocks), which, with a thickness of 100 m, adequately simulates the dip in the gravity profile. Alternatively, semi-consolidated material with, say, a -0.35 g/cc contrast and a 200 m thickness would also work, while the depth estimate could also be affected by a failure of the 200 m spaced gravity stations to capture the true shape of the double peak. Table 1 gives more details. Transient electroMagneticsPreambleEarly workers in the 1970s era of the Olympic Dam discovery believed that the sulphides within the hematite breccia ore would be too widely disseminated and too poorly connected to be sensed by transient electromagnetic (TEM) prospecting systems, which were, and still are, used effectively to assess profiles of the late time channels for bumps that might indicate nickel-rich pyrrhotite and/or other high conductance ores. We refer here to such TEM effects as Local Magnetic Induction (LMI) Figure 5.3. Model depth slice: 871 m.FEBRUARY 2024PREVIEW 45'