That article is very poor in many respects...seems like a snow job from some funds wanting in cheaper. For one thing, ZEN raised 12.7M dollars from warrant exercise, not 6.7M.
Overburden has been consistent at about 40m which is not considered very thick in mining terms.
Do not be snowed by poor reporting. The most important line in there is:
Roth Capital analyst Matt Koranda, said the buy rating remains in place even though the stock is trading well above the $4 target.
And that is because that $4 target was based on finding 13M tons of raw ore and Matt know we have about 4X that in the East pipe alone!!
G.