Ann: Deeper Drilling at Carlow Castle Shows Depth Potential, page-16

Yes - from my quick eyeball of some of the assay results - it looks like the As values are elevated wherever you have high Cu and Au assays.

Would be a shame to have a nuisance element like As become a show stopper. Unfortunately some of the reagents used to suppress/remove arsenic and almost worse than arsenic itself!

This paper is probably one of many that discusses the issue:

https://www.sciencedirect.com/science/article/abs/pii/S0301751609001483


This is where good plant metallurgists and operators are worth their weight in gold. But other companies and operations also deal with nuisance elements and I am sure that any good metallurgical study will address this.

I take your point that it is a risk worth considering though.