2. Geology and Exploration

Resource Estimation — Quiz

Test your understanding of resource estimation with 5 practice questions.

Practice Questions

Question 1

When performing ordinary kriging for resource estimation, which of the following assumptions is crucial for the validity of the variogram model?

Question 2

A mining project is evaluating a polymetallic deposit where the grades of different metals (e.g., copper, zinc, lead) are spatially correlated. Which geostatistical interpolation method would be most appropriate to estimate the grades of these multiple variables simultaneously, accounting for their interdependencies?

Question 3

Consider a block model where the estimated grade of a block, $Z^*(v)$, is calculated using a linear combination of sample grades, $Z(x_i)$, within a search neighborhood. If the weights, $\lambda_i$, are determined such that the estimation variance is minimized and the estimate is unbiased, which interpolation method is being applied?

Question 4

During the data preparation phase, a mining engineer encounters a dataset with several outliers in the gold assay values. Which of the following is the most appropriate initial step to address these outliers before proceeding with resource estimation?

Question 5

A mining company is developing a new project and has classified a portion of its mineral deposit as an 'indicated mineral resource'. What is the primary implication of this classification regarding the level of confidence and potential for economic extraction?