High Grades & Broad mineralized widths

[kathilu]

I really would like to know how can I say in SpanishHigh Grades & Broad mineralized widths
in the following context:

"It has become a key project for us. With its persistent high grades, broad
mineralized widths, excellent ground conditions and favorable metallurgy, it has the potential to rapidly increase our production"

I'm translating a Mining press release.

Thanks in advance

 

[avizor]

veamos...
high grade, HG, según la wikipedia inglesa representa la pureza de un mineral (zinc = 99,90)
broad mineralized width, no sé traducirlo, que alguien me ayude!!!

 

[0scar]

vetas minerales anchas