This one is pretty good as well....

This one is pretty good as well.
https://pubs.usgs.gov/pp/1802/u/pp1802u.pdf

But I still haven’t been able to find what I’m looking for, which is:

For a VTM deposit, what are the average levels of deleterious materials?

In appendix 2 of last weeks ann, we are given values for Fe, Al2O3, and SiO2. Some of those values look high to me but may not necassirly be atypical of this type of deposit.ASX:VML for example has Fe levels of around half of TNO. Obviously deleterious material (and there are others that I’ve come across whilst reading) needs to be factored in to the cost of processing and may negate some of the shine off of high V levels.

I’m just trying to get a handle on what is a new commodity to me. If there are any geo types out there who can point me in the right direction, I’d appreciate it.
Regards,
Perdy