Pisolitic laterite geochemistry in the golden grove massive sulphide district, Western Australia

Transported cover in northwestern Victoria, Australia — An impediment to geochemical exploration for gold

“…For the HA extraction, which targets the amorphous Mn oxide fraction results of pathfinders were normalized to Mn. The CHI*6 index (As + 3.56 * Sb + 10 * Bi + 3 * Mo + 30 * Ag + 30 * Sn + 10 * W + 3.5 * Se) was developed by Smith and Perdrix (1983) and also tested as it has been effectively used to detect anomalous corridors of chalcophile elements (Cornelius et al, 2008;Smith et al, 1989) using laterite residuum.…”

Gossans

“…At the Golden Grove polymetallic sulphide deposit in Western Australia, for example, anomalous values of pathfinder elements were detected in lateritic pisolites about a kilometre downslope from gossan outcrops, although some of this dispersion can be attributed to hydromorphic effects (Smith and Perdrix, 1983). The typical "mushroom" effect observed in many gossan profiles (e.g.…”

“…Gossan fragments can also be incorporated into pisolites during lateritic weathering, and analyses of such pisolites have shown that they have retained the element associations characteristic of the gossan from which they were derived (Smith and Perdrix, 1983).…”

Biological origin of minerals in pisoliths in the Darling Range of Western Australia

“…They have been shown to be reliable exploration media for regional ground selection to target delineation for a wide range of commodities (Smith & Perdrix 1983;Anand et al 1989a;Smith et al 2000;Anand 2001;Cornelius et al 2001). Pisoliths may also form bauxitic ore, for example at Weipa (Taylor et al 2008).…”