Why the archive matters
The next discovery may already be in a box.
1981
Hole AD4W1 is drilled to 1,256 m into the Oak Dam West gravity anomaly. No copper is seen. The hole is written off and the core boxed away.
2018
Thirty-seven years later, a rich iron oxide copper-gold-uranium discovery is announced about 200 m from that "barren" hole.
425.7 m at 3.04% Cu, 0.59 g/t Au, 0.34 kg/t U and 6.03 g/t Ag from 1,063 m — including 180 m at 6.07% Cu.
The rock never changed. The interpretation did. Re-reading old drilling against a new mineral systems model turned a discarded anomaly into one of the most significant copper discoveries in recent history.
Today that kind of re-interrogation is slow, costly and physically hazardous, so it rarely happens at scale. That is the problem Prospectra exists to remove.