Going off the PRs it's existing ore Mexus currently has over 12,000 tons of ore stockpiled and ready to mine which was a result of the preparation of the pit on the Julio vein. This material is being crushed and placed on the pad now and new ore from high grade will be added to the tune of 5700 tons.
The initial material being leached is existing shear zone lower grade material averaging 1.8 g/t gold and 8 g/t silver. This material was mined while the Julio vein was being drilled and prepped for blasting.

Approximately 5700 tons of high-grade quartz vein material will be broken on site and hauled to the crushing and leaching site. The estimated grade for this material is in the order of 5 to 10 g/t Au and 9 to 12 g/t Ag.

Bummer that in 3 weeks avg of gold grade dropped to 4g from 5-10g.

The estimated grade for this material is in the order of 5 to 10 g/t Au and 9 to 12 g/t Ag.

Julio vein ore material is averaging 4 g/t gold and 12 g/t silver.)

So 12,000tons of really low grade and a smatering of high grade possibly to bring it up to 17,700 tons.