Geophysical Experience from the Blendevale Deposit W.A.

Geophysical Investigation of the Pb–Zn Deposit of Lontzen–Poppelsberg, Belgium

“…In the Lennard Shelf ore deposit (Western Australia, Australia), the Pb-Zn mineralization is associated with abundant marcasite haloes generating induced polarization anomalies [19]. For example, the IP survey gives the best results on the Blendevale ore deposit (the biggest deposit of the district) as a result of the large amount of pyrite that is strongly associated with the Pb-Zn sulphides; even if the strongest IP signal does not always correspond to the highest Pb-Zn content [20]. Dissociated iron sulphides from the Pb-Zn sulphides can help to indirectly target a deposit [13].…”

Short Note: Early seismic refraction and gravity exploration over the Blendvale MVT lead-zinc deposit, Western Australia

“…The interpretation was constrained by the single borehole (BH on Figure 1), and by measured rock densities on a few shale and limestone samples from this hole. Figure 1 shows the interpreted seismic refraction and gravity sections over the main part of Line AA with the Bouguer gravity profile that was also shown in Figure 4 of Isles et al (1987). The interpreted gravity section was obtained using a density contrast between the shales and siltstones and the limestone of 0.35 t.m -3 , which is close to the 0.30 t.m -3 obtained by Fullagar et al (2004) using extensive borehole data.…”

“…Early Blendvale area geophysical exploration during the 1980s, with IP, gravity, and seismic refraction, has been summarised by Isles et al (1987). These authors also presented a Mini Sosie seismic reflection section over the deeper limestone about 1500 m north of Blendvale that was obtained sometime after the 1980s exploration phase, but no interpretations of the initial seismic refraction or gravity data were presented.…”

“…4 of Isles et al, 1987) traversed the Blendvale deposit in a NW-SE direction, approximately orthogonal to the strike of the reef complex. The refraction line was 9.0 km in length and extended onto the shale/ siltstone sequence at its margins.…”

3D Gravity and Aeromagnetic Inversion for Mvt Lead-Zinc Exploration at Pillara, Western Australia

“…MVT Pb/Zn mineralization is difficult to detect geophysically, so geophysics serves primarily as a stratigraphic and structural mapping tool. In particular, the existence of strong density and velocity contrasts between the limestones and the overlying clastic sediments has allowed seismic and gravity to play a useful role in mapping limestone topography (Isles et al, 1987;Scott et al, 1994).…”