Hello, first you will have to do some studying, 

You can learn a majority of what you need to no online, please, no offense to the fine geologists out there.

What you need to do is use the same formulas as what is required  to provide a 43- 101.

Not really that hard, and once you no it you can calculate raw ounces with an error factor of -20/+20

The nice thing about learning these formulas you can draw conclusions on any exploration company

This certainly doesn't take into account Economic assesments or feasabilitiy studies.

Have a great day