Ann: Bonanza Gold Grades in Mulga Bill Phase 5 RC Drilling, page-17

Thanks gustaaf and Mandrews871 for raising this point of "Bonanza gold grades".
I also knew this was an industry term but was not sure what grade constituted 'bonanza' and thus when you could or couldn't use that term.

I found this description online:
"In gold exploration, Bonanza is big news. The gold exploration industry defines a “Bonanza result” as any result above 34g of gold per tonne of rock/ore (g/t) - which is extremely high grade. Anything above 5 g/t is considered high grade, but 34 g/t Bonanza grades are a whole other level."
So GBR's 4m at 40.68gt qualifies.

All the best,
Mama Huhu