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Spectrometry can be used to map the alteration foot print of a porphyry copper deposit

The Casino deposit is a Cu-Mo porphyry deposit located in Yukon.

Gamma ray spectrometry detected potassium enrichment due to potassic alteration associated with the porphyry copper deposit.

Low eTh/K ratios indicate potassium enrichment relative to normal lithological signatures, indicating that the potassium anomaly is due to alteration.

A stacked profile clearly shows the relationship of the radioelements and the magnetic response over the deposit.