Ann: High-Grade Copper-Gold Discovery At Cloncurry, page-53

Correct atacamite. BHP discovered and drilled nearby Sandy Ck in the late 80's. I believe it was found by MLEM and was the best conductor in the area that was surveyed at the time. It is small and pod like, much like the Eliose bodies - except they are are a few in number and proximal to each other.

IMO, the size of the conductor says enough, but the results made for a good trade on the day.