Chariot Corporation has struck some intriguing mineralisation during exploration at its Black Mountain project in the United States, suggesting it may be homing in on a high-grade lithium source, which early evidence suggests may be lurking beneath. The company has confirmed the presence of rubidium in feldspar crystals, which is often a pathfinder to lithium-caesium-tantalum (LCT) mineralisation, with high ratios of potassium-to-rubidium being a further source of encouragement.