I did a bit more googling last night and found the term in a glossary within a report filed with the SEC in by a US gold firm.
They defined 'Bonanza grade' to be a sample with 34.0 g/t AU or more.
It would still be nice to find an official definition of tetms though. I went through the JORC documents and their US equivalent yesterday and didn't finda anything.
Nice to see a small bounce in the price yesterday even though it only slightly recovered from the losses of the last few weeks. Not even sure if a 'super duper bonanza grade' would have much of an impact with the current resouces sentiment.
SXG Price at posting:
0.0¢ Sentiment: None Disclosure: Held