If at the onset of a major ore body the preliminary sampling finds a combination of copper, nickel and cobalt, what could be expected at depth--i.e., deep inside the ore body? I am interested in knowing if a massive ore body is always going to be a mixture of the three or does a massive ore body become purer at depth--i.e., will the massive ore body be predominantly copper or nickel or cobolt. I am just attempting to understand the overall distribution of metals and how they might be distributed at depth. Thank you.