PEA...not as robust as one might think...I am going to attempt to post the link from the Osisko Website in regards to todays news release regarding the PEA...if it does not post just go to the website...bring up the release...scroll down to the Resource Estimate..
Table 6: Windfall Deposit Mineral Resorce Estimate.
The chart will identify the following in regards to ounces in each category namely Measured...Indicated and Inferred. I will attach a description of each category...you will quickly see the difference and the confidence of each category when it comes to mining each resource.
Measured 189,000 gold ounces
Indicated 1,668,000 gold ounces
Inferred 4,244,000 gold ounces
They only have 1,857,000 ounces in the Measured & Indicated category
....the remaining is in the Inferred...the lowest and less accurate category...even the Indicated category is not that strong of a indicatory.
The attached descripition of each category will be very helpful..take a look. Mineral resources[edit]
A 'Mineral Resource' is a concentration or occurrence of material of intrinsic economic interest in or on the earth's crust in such form, quality and quantity that there are reasonable prospects for eventual economic extraction. Mineral Resources are further sub-divided, in order of increasing geological confidence, into inferred, indicated and measured as categories.
Inferred Mineral Resource is the part of a mineral resource for which quantity, grade (or quality) and mineral content can be estimated with a low level of confidence. It is inferred from geological evidence and assumed but not verified geological or grade continuity. It is based on information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes which may be of limited or uncertain quality and it is also reliability.
Indicated resources are simply economic mineral occurrences that have been sampled (from locations such as outcrops, trenches, pits and drill holes) to a point where an estimate has been made, at a reasonable level of confidence, of their contained metal, grade, tonnage, shape, densities, physical characteristics.
Measured resources are indicated resources that have undergone enough further sampling that a 'competent person' (defined by the norms of the relevant mining code; usually a geologist has declared them to be an acceptable estimate, at a high degree of confidence, of the grade (or quality), quantity, shape, densities, physical characteristics of the mineral occurrence.
Osisko (osiskomining.com)