Top left - multivariate precious metal basal till anomaly– silver, gold, bismuth, antimony, tellurium

Top right - multivariate base metal basal till anomaly – copper, lead, zinc

Bottom left - multivariate rare metal basal till anomaly – cerium, cesium, europium, lanthanum, lutetium, rubidium, samarium, terbium, thorium, uranium, ytterbium

Bottom right - multivariate basal till anomaly – molybdenum, tin, tungsten